CN107188128A - A kind of method that thick iodine is reclaimed in secondary zinc oxide - Google Patents
A kind of method that thick iodine is reclaimed in secondary zinc oxide Download PDFInfo
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- CN107188128A CN107188128A CN201710401832.8A CN201710401832A CN107188128A CN 107188128 A CN107188128 A CN 107188128A CN 201710401832 A CN201710401832 A CN 201710401832A CN 107188128 A CN107188128 A CN 107188128A
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- iodine
- zinc oxide
- alkali
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- secondary zinc
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- 229910052740 iodine Inorganic materials 0.000 title claims abstract description 131
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 239000011630 iodine Substances 0.000 title claims abstract description 130
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical group [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 239000011787 zinc oxide Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000003513 alkali Substances 0.000 claims abstract description 45
- 230000001590 oxidative effect Effects 0.000 claims abstract description 31
- 239000007800 oxidant agent Substances 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 230000003647 oxidation Effects 0.000 claims abstract description 14
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 14
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000002425 crystallisation Methods 0.000 claims abstract description 10
- 230000008025 crystallization Effects 0.000 claims abstract description 10
- 238000000926 separation method Methods 0.000 claims abstract description 10
- 238000007654 immersion Methods 0.000 claims abstract description 9
- 239000007787 solid Substances 0.000 claims abstract description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 6
- 238000002386 leaching Methods 0.000 claims abstract description 6
- 239000013078 crystal Substances 0.000 claims abstract description 4
- 238000001704 evaporation Methods 0.000 claims abstract description 4
- 230000008020 evaporation Effects 0.000 claims abstract description 4
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical compound [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000003828 vacuum filtration Methods 0.000 claims abstract description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 24
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 20
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- 235000010265 sodium sulphite Nutrition 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 6
- 235000017550 sodium carbonate Nutrition 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 claims description 4
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 claims description 2
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 claims description 2
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims 2
- 238000011084 recovery Methods 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000013508 migration Methods 0.000 abstract description 2
- 238000012546 transfer Methods 0.000 abstract description 2
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical group [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 229910052700 potassium Inorganic materials 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 239000001117 sulphuric acid Substances 0.000 description 4
- 235000011149 sulphuric acid Nutrition 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- -1 and atomic number 53 Inorganic materials 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical group 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 150000002497 iodine compounds Chemical class 0.000 description 1
- 229910001674 iodine mineral Inorganic materials 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- HNBFUFIYQWYCDM-UHFFFAOYSA-N oxygen(2-) sulfane titanium(4+) Chemical compound [O--].[O--].S.[Ti+4] HNBFUFIYQWYCDM-UHFFFAOYSA-N 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 230000001698 pyrogenic effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229940098465 tincture Drugs 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/13—Iodine; Hydrogen iodide
- C01B7/14—Iodine
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a kind of method that thick iodine is reclaimed in secondary zinc oxide, it has the following steps：Alkaline leaching, adds alkali to leach secondary zinc oxide material, and solid-liquor separation obtains the immersion liquid of alkali containing iodine and leached mud；Acidifying, sulfuric acid is added to alkali immersion liquid or hydrochloric acid carries out being acidified to obtain iodin-containing liquid；Oxidation and blowout, the iodin-containing liquid after acidifying add oxidant, air are blasted in the solution, iodine oxidation is escaped into iodine steam and separate；Trapping, traps iodine steam with reducing agent, obtains rich iodine solution；Crystallization Separation, rich iodine solution adds oxidant crystallization, obtains the solid crystal of black purple, and isolated by vacuum filtration, obtains thick iodine.Lean solution after iodine ease is isolated is neutralized to after ph values 78 with alkali, send multiple-effect evaporation operation to reclaim potassium sodium therein.The present invention is effectively reclaimed the iodine of secondary zinc oxide production process transfer in-migration, the technological process of whole recovery method is brief, and operations number is few, but school assignment quick, thick iodine grade and the iodine rate of recovery are high, are reclaimed for the low-grade iodine in secondary zinc oxide class metallurgical material and provide technological borrowing.
Description
Technical field
The present invention relates to a kind of method that thick iodine is reclaimed in secondary zinc oxide.
Background technology
Iodine is halogen, and atomic number 53, iodine is in atropurpureus crystal, easily distillation, is easily sublimated after distillation.Iodine have compared with
Strong toxicity and corrosivity.With the development of science and technology, the purposes of iodine expands from fields such as traditional tincture of iodine, dyestuff, test paper
To the iodine compound of a variety of functions.Meanwhile, iodine is also one of the essential trace elements of the human body, is also commonly incorporated into salt certain
Iodine makes salt compounded of iodine, to prevent the generation of some diseases.With the continuous expansion of iodine new application, its consumption and market value are also in hair
Give birth to great variety.However, iodine content in nature is rare, almost without independent iodine mineral, mostly with associated resources
Form is present in various non-ferrous metals or metallurgical semi-finished product or intermediate product, and content is low, causes cost recovery very high, China
The gesture that supply is asked is presented in the yield and consumption figure of iodine.The existing active charcoal method of technology, ion-exchange for reclaiming iodine etc., due to adding
Work cost is high, and resin saturation degree is low, the low reason of the rate of recovery can not be mass produced.Also have and carried out for different raw materials containing iodine
Special process technology, but all more dispersed, the technology report for being available for using for reference of no specification.
Secondary zinc oxide be by low-grade, high impurity material containing zinc by pyrogenic process enrichment handle obtain be rich in volatile metal
The primary product based on zinc oxide.Because impurity is high, especially containing elements such as K, Na, Cl, simultaneously containing I elements, mainly
The recovery technology of valuable element zinc is different from the conventional zinc abstraction technology using zinc concentrate as raw material, need to increase alkali leaching removing
K, Na, Cl and alkali immersion liquid reclaim, separate valuable element or the process of other materials.K, Na, Cl, I etc. enter during alkali leaching
The content of iodine entered in alkali immersion liquid, alkali wash water reaches more than 1g/l, has higher recovery value, hesitates to discard, will also result in resource
Waste, and the pollution to environment.Therefore, research and development can be entered simultaneously in the production process of this kind of primary raw materials of secondary zinc oxide
The method that row iodine is reclaimed is very important.
The content of the invention
Therefore, the present invention proposes a kind of method that thick iodine is reclaimed in secondary zinc oxide, this method can be by secondary zinc oxide
Low-grade iodine high efficiency extraction, while the valuable element such as synthetical recovery potassium sodium, improves secondary zinc oxide purity, improves the utilization water of resource
It is flat, improve Business Economic Benefit.
The purpose of the present invention is realized by following means.
A kind of method that thick iodine is reclaimed in secondary zinc oxide, it is characterised in that have the following steps：
（1）Alkaline leaching, adds alkali to leach secondary zinc oxide material, and solid-liquor separation obtains the immersion liquid of alkali containing iodine and leached mud；
（2）Acidifying, sulfuric acid is added to alkali immersion liquid or hydrochloric acid carries out being acidified to obtain iodin-containing liquid；
（3）Oxidation and blowout, the iodin-containing liquid after acidifying add oxidant, air are blasted in the solution, makes iodine oxidation into iodine steam
Effusion separation；
（4）Trapping, traps iodine steam with reducing agent, obtains rich iodine solution；
（5）Crystallization Separation, rich iodine solution adds oxidant crystallization, obtains the solid crystal of black purple, and isolated by vacuum filtration, obtains
Thick iodine.
Step（1）Secondary zinc oxide alkali soak operation liquid-solid ratio（Mass ratio）For 2.5-5:1, temperature control is on 75 DEG C of left sides
The right side, alkali used is the one or more in soda ash, piece alkali and liquid caustic soda, the ph7-12. of alkali wash water terminal
Step（2）The whole acid concentration of acidifying solution controls the temperature in 3-10g/l, acidization to be 45-65 DEG C of
Step（3）Oxidant addition according to acidifying solution oxidizing potential be not less than 480mv standard control add, blast air
Stress control in 10-50kpa.
Step（3）One or more of the oxidant in hydrogen peroxide, hypochlorite, sodium chlorate and potassium chlorate.
Step（3）Lean solution after iodine effusion separation is neutralized to after ph7-8 with alkali, send multiple-effect evaporation operation to reclaim potassium therein
Sodium.
Step（4）The control of rich iodine solution iodine concentration not less than 40g/l, reducing agent used is sodium sulfite or titanium dioxide
Sulphur.
Step（5）In oxidant be hydrogen peroxide.
The present invention is effectively reclaimed the low-grade iodine of secondary zinc oxide production process transfer in-migration, is controlled during alkali leaching
Solution ph processed makes iodine enter alkali immersion liquid, after alkali wash water containing iodine is acidified with sulfuric acid or hydrochloric acid, and oxygen is added according to oxidizing potential
Agent, iodine is effectively evaporated separate, and reducing agent absorbs the rich iodine solution of iodine steam output, and rich iodine solution carries out aoxidizing again and vacuum separation
Obtain thick iodine product.The technological process of whole recovery method is brief, and operations number is few, but school assignment quick, and thick iodine grade and iodine are returned
High income, reclaims for the low-grade iodine in the metallurgical primary material of secondary zinc oxide class and provides the choice of technology.
Brief description of the drawings
Fig. 1 is present invention process flow chart.
Embodiment
The advantageous effects of the present invention are further illustrated with example below in conjunction with the accompanying drawings.
The technical process of following example is with shown in Fig. 1.
Example one
Secondary zinc oxide contains iodine 0.054%, the liquid-solid ratio of alkali cleaning（Mass ratio, similarly hereinafter）For 3.1：1, use in alkaline cleaning procedure pure
Alkali, alkali cleaning temperature is 75 DEG C, and terminal pH is 10, and after being soaked by alkali, iodine is enriched to 0.723g/l in solution.Use industrial sulphuric acid
It is acidified, acid is 4g/l to solution eventually after acidifying；Acidifying solution uses hydrogen peroxide oxidation, and oxidizing potential is 495mV, the aobvious purple of solution
There is purple gas slowly spilling on color, surface.Iodine air inlet in the air that pressure is 30kpa, solution is blasted in oxidation solution
Formation iodine steam, and the lean solution that solution becomes colorless, through analysis, the iodine in lean solution is 0.015g/l, and lean solution is neutralized using piece alkali
Triple effect evaporator is returned after to ph8 and reclaims k-na salt, iodine steam is absorbed using sodium sulfite solution, in absorption process progressively
When iodine is enriched to 45.7g/l in supplement sodium sulfite, rich iodine solution, rich iodine solution is delivered to oxidizing and crystallizing in crystallization reaction groove, according to
The oxidant of addition needed for the gauge of iodine is calculated, hydrogen peroxide is as oxidant, and the thick iodine crystallized out is obtained slightly by vacuum filter
Iodine, thick iodine contains iodine 95.4%.It is 91% by the rate of recovery for calculating iodine in secondary zinc oxide.
Example two
Secondary zinc oxide contains iodine 0.076%, and the liquid-solid ratio of alkali cleaning is 2.9：1, soda ash is used in alkaline cleaning procedure, alkali cleaning temperature is 75
DEG C, terminal pH is 10, and after being soaked by alkali, solution is enriched to 0.887g/l containing iodine.It is acidified using industrial sulphuric acid, after acidifying
Acid is 4.2g/l to solution eventually；Acidifying solution uses hydrogen peroxide oxidation, and oxidizing potential is 505mV, and solution shows purple, and there is purple gas on surface
Body slowly overflows.Iodine air inlet formation iodine steam in the air that pressure is 30kpa, solution is blasted in oxidation solution, and it is molten
The lean solution that liquid becomes colorless, through analysis, the iodine in lean solution is 0.018g/l, and lean solution is neutralized to after pH8 using piece alkali and returns to triple effect
Evaporator reclaims k-na salt.Iodine steam is absorbed using sodium sulfite solution, and sodium sulfite is progressively supplemented in absorption process, rich
When iodine is enriched to 43.6g/l in iodine solution, rich iodine solution is delivered to oxidizing and crystallizing in crystallization reaction groove, according to needed for being calculated the gauge of iodine
The oxidant of addition, hydrogen peroxide is as oxidant, and the thick iodine crystallized out obtains thick iodine by vacuum filter, and thick iodine contains iodine 95.3%.
It is 93% by the rate of recovery for calculating iodine in secondary zinc oxide.
Example three
Secondary zinc oxide contains iodine 0.15%, and the liquid-solid ratio of alkali cleaning is 3.2：1, soda ash is used in alkaline cleaning procedure, alkali cleaning temperature is 75
DEG C, terminal pH is 10, and after being soaked by alkali, solution is enriched to 1.186 g/l containing iodine.It is acidified, is acidified using industrial sulphuric acid
Acid is 4g/l to solution eventually afterwards；Acidifying solution uses hydrogen peroxide oxidation, and oxidizing potential is 490mV, and solution shows purple, and there is purple gas on surface
Body slowly overflows.Iodine air inlet formation iodine steam in the air that pressure is 30kpa, solution is blasted in oxidation solution, and it is molten
The lean solution that liquid becomes colorless, through analysis, the iodine in lean solution is 0.025g/l, and lean solution is neutralized to after pH8 using piece alkali and returns to triple effect
Evaporator reclaims k-na salt, and iodine steam is absorbed using sodium sulfite solution, and sodium sulfite is progressively supplemented in absorption process, rich
When iodine is enriched to 54.3g/l in iodine solution, rich iodine solution is delivered to oxidizing and crystallizing in crystallization reaction groove, and being calculated according to the gauge of iodine to add
The oxidant entered, hydrogen peroxide is as oxidant, and the thick iodine crystallized out obtains thick iodine by vacuum filter, and thick iodine contains iodine 95.8%.Through
It is 92.6% to cross and calculate the rate of recovery of iodine in Second-rate zinc oxide powder.
Example four
Secondary zinc oxide contains iodine 0.062%, and the liquid-solid ratio of alkali cleaning is 3.3：1, soda ash is used in alkaline cleaning procedure, alkali cleaning temperature is 75
DEG C, terminal pH is 10, and after being soaked by alkali, solution is enriched to 0.618g/l containing iodine.It is acidified using industrial sulphuric acid, after acidifying
Acid is 4g/l to solution eventually；Acidifying solution uses hydrogen peroxide oxidation, and oxidizing potential is 515mV, and solution shows purple, and there is purple gas on surface
It is slow to overflow.The air that pressure is 30kpa is blasted in oxidation solution, iodine air inlet formation iodine steam in solution, and solution
The lean solution become colorless, through analysis, the iodine in lean solution is 0.02g/l, and lean solution is neutralized to after pH8 using piece alkali and returns to triple effect evaporation
Device reclaims k-na salt, and iodine steam is absorbed using sodium sulfite solution, and sodium sulfite, rich iodine solution are progressively supplemented in absorption process
When middle iodine is enriched to 58.6g/l, rich iodine solution is delivered to oxidizing and crystallizing in crystallization reaction groove, calculates what need to be added according to the gauge of iodine
Oxidant, hydrogen peroxide is as oxidant, and the thick iodine crystallized out obtains thick iodine by vacuum filter, and thick iodine contains iodine 95.3%.By meter
The rate of recovery for calculating iodine in Second-rate zinc oxide powder is 92%.
Claims (8)
1. the method for thick iodine is reclaimed in a kind of secondary zinc oxide, it is characterised in that have the following steps：
（1）Alkaline leaching, adds alkali to leach secondary zinc oxide material, and solid-liquor separation obtains the immersion liquid of alkali containing iodine and leached mud；
（2）Acidifying, sulfuric acid is added to alkali immersion liquid or hydrochloric acid carries out being acidified to obtain iodin-containing liquid；
（3）Oxidation and blowout, the iodin-containing liquid after acidifying add oxidant, air are blasted in the solution, makes iodine oxidation into iodine steam
Effusion separation；
（4）Trapping, traps iodine steam with reducing agent, obtains rich iodine solution；
（5）Crystallization Separation, rich iodine solution adds oxidant crystallization, obtains the solid crystal of black purple, and isolated by vacuum filtration, obtains
Thick iodine.
2. the method for thick iodine is reclaimed in secondary zinc oxide according to claim 1, it is characterised in that step（1）Secondary zinc oxide alkali
Soak the liquid-solid ratio of operation（Mass ratio）For 2.5-5:1, temperature control is at 75 DEG C or so, and alkali used is soda ash, piece alkali and liquid caustic soda
In one or more, the ph values of alkali wash water terminal are 7-12.
3. the method for thick iodine is reclaimed in secondary zinc oxide according to claim 1, it is characterised in that step（2）The acid eventually of acidifying solution
Concentration control temperature in 3-10g/l, acidization is 45-65 DEG C.
4. the method for thick iodine is reclaimed in secondary zinc oxide according to claim 1, it is characterised in that step（3）Oxidant add
Measure the standard for being not less than 480mv according to acidifying solution oxidizing potential to control to add, blast the Stress control of air in 10-50kpa.
5. the method for thick iodine is reclaimed in secondary zinc oxide according to claim 1, it is characterised in that step（3）Oxidant be selected from
One or more in hydrogen peroxide, hypochlorite, sodium chlorate and potassium chlorate.
6. the method for thick iodine is reclaimed in secondary zinc oxide according to claim 1, it is characterised in that step（3）After iodine ease is isolated
Lean solution be neutralized to alkali after ph values 7-8, send multiple-effect evaporation operation to reclaim potassium sodium therein.
7. the method for thick iodine is reclaimed in secondary zinc oxide according to claim 1, it is characterised in that step（4）Rich iodine solution iodine it is dense
Degree control is not less than 40g/l, and reducing agent used is sodium sulfite or sulfur dioxide.
8. the method for thick iodine is reclaimed in secondary zinc oxide according to claim 1, it is characterised in that step（5）In oxidant be
Hydrogen peroxide.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108862199A (en) * | 2018-06-28 | 2018-11-23 | 广东先导稀材股份有限公司 | The method of iodine is recycled in the waste liquid of trimethyl gallium containing iodine |
| CN109019513A (en) * | 2018-10-12 | 2018-12-18 | 鑫联环保科技股份有限公司 | A method of iodine is extracted based on high chlorine Zinc Oxide alkali cleaning dechlorination liquid |
| CN109250689A (en) * | 2018-11-29 | 2019-01-22 | 河北远大中正生物科技有限公司 | It is a kind of rinsed using secondary zinc oxide after the salt water technique for preparing calcium iodate as raw material |
| CN109336053A (en) * | 2018-11-29 | 2019-02-15 | 河北博泰环保科技有限公司 | A method of iodine is extracted from the salt water after secondary zinc oxide rinsing |
| CN112121735A (en) * | 2020-09-02 | 2020-12-25 | 衡阳百赛化工实业有限公司 | Retrieve device of thick iodine in secondary zinc oxide |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108862199A (en) * | 2018-06-28 | 2018-11-23 | 广东先导稀材股份有限公司 | The method of iodine is recycled in the waste liquid of trimethyl gallium containing iodine |
| CN109019513A (en) * | 2018-10-12 | 2018-12-18 | 鑫联环保科技股份有限公司 | A method of iodine is extracted based on high chlorine Zinc Oxide alkali cleaning dechlorination liquid |
| CN109250689A (en) * | 2018-11-29 | 2019-01-22 | 河北远大中正生物科技有限公司 | It is a kind of rinsed using secondary zinc oxide after the salt water technique for preparing calcium iodate as raw material |
| CN109336053A (en) * | 2018-11-29 | 2019-02-15 | 河北博泰环保科技有限公司 | A method of iodine is extracted from the salt water after secondary zinc oxide rinsing |
| CN109250689B (en) * | 2018-11-29 | 2020-06-05 | 河北远大中正生物科技有限公司 | Process for preparing calcium iodate by taking saline water obtained after rinsing secondary zinc oxide as raw material |
| CN112121735A (en) * | 2020-09-02 | 2020-12-25 | 衡阳百赛化工实业有限公司 | Retrieve device of thick iodine in secondary zinc oxide |
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