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WO2007095575A1 - Procedes et compositions de traitement de pate chimique - Google Patents

Procedes et compositions de traitement de pate chimique Download PDF

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Publication number
WO2007095575A1
WO2007095575A1 PCT/US2007/062136 US2007062136W WO2007095575A1 WO 2007095575 A1 WO2007095575 A1 WO 2007095575A1 US 2007062136 W US2007062136 W US 2007062136W WO 2007095575 A1 WO2007095575 A1 WO 2007095575A1
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WO
WIPO (PCT)
Prior art keywords
strain
pulp
lipase
chemical pulp
peroxide source
Prior art date
Application number
PCT/US2007/062136
Other languages
English (en)
Inventor
Hui Xu
Kimberly Bloomfield
Stefanie Mccloskey
Kim Borch
Original Assignee
Novozymes North America, Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Novozymes North America, Inc filed Critical Novozymes North America, Inc
Priority to EP07717616A priority Critical patent/EP1994219A1/fr
Priority to BRPI0707656-8A priority patent/BRPI0707656A2/pt
Priority to CA002637691A priority patent/CA2637691A1/fr
Priority to AU2007214449A priority patent/AU2007214449A1/en
Priority to US12/160,898 priority patent/US20090065159A1/en
Priority to JP2008554548A priority patent/JP2009526919A/ja
Publication of WO2007095575A1 publication Critical patent/WO2007095575A1/fr
Priority to NO20083436A priority patent/NO20083436L/no

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/02—Agents for preventing deposition on the paper mill equipment, e.g. pitch or slime control

Definitions

  • the present invention relates to enzymatic compositions and methods for treating pitch problems in chemical pulp
  • Wood contains about 1 to 10% of pitcn or extractives in addition to its main components cellulose, hemicull ⁇ se and lignin.
  • Major components of pitch are fatty acids, triglycerdies, sterols, steryi esters and resirs adds, such as, for example, abietic acid.
  • Pitch causes problems in paper machines by sticking to the rollers and causing spots or holes in the paper material.
  • WO 00/53843 discloses steryl esterase enzyme preparations and their use in the manufacture of paper to hydroiyze the steryi ester part of pitch.
  • U.S. Pat Ho. 6,066.486 discloses an enzyme preparation comprising a cholesteroi esterase derived from Pseudomo ⁇ as fragi > and its use to hydrolyze pulp resin.
  • JP 2000080581 discloses the use of certain peroxidases for the decomposition of abietic acid during pulping or paper making processes.
  • the present invention relates to compositions and methods for treating pitch problems in chemical pulp by treating chemical pulp process water with a combination of a lipase and a peroxide source.
  • a lipase and peroxide leads to the formation of perac ⁇ ds which in turn oxidize unsaturated fatty acids and resin acids through an expoxidation reaction.
  • the resuiting products are hydrophiiic and are readily washed from the pulp, thereby reducing pitch problems associated with chemical pulp.
  • the present invention relates to compositions and methods for treating pitch problems in chemical pulp by treating chemical pulp process water with a lipase, a peroxide source and an organic add.
  • a "paper-making process” refers to a process wherein a chemical pulp is suspended in water, mixed wrth various additives and then passed to equipment for further processing, e.g., in which frte paper, cardboard, tissue, towel etc. is formed, pressed and dried.
  • paper material refers to products which can be made out of pulp, such as pa- per, lirserboard, corrugated paperboard , tissue, towels, corrugated containers or boxes.
  • a papermaksng pulp or “pulp” means any chemical pulp which can be used for the production of a paper materia).
  • a “chemical pulp” refers to chemical pulp (such as Kraft pulp or sulfite pulp) or seroichemical pulp (SCP).
  • Chemicai pulp is usually manufactured by alkaline cooking whereby most of the lignin and some hem ⁇ cellulo ⁇ e components are removed.
  • Jn Kraft pulpmg or sulphate cooking, sodium sulphide or s ⁇ drum hydroxide are generally used as principal cooking Chemicals.
  • Jn such pulp as a result of the alkaline cooking, the triglyceride part of pitch wfll be hydrolyzed ⁇ nto fatty acids and glycerol.
  • the chemical pulp is a Kraft pulp or a sulfite pulp
  • the Kraft pulp is bleached Kraft pulp, for example softwood bleached Kraft (SWBK. also called NSKP (Nadef Note Bleached Kraft PuIp)), hardwood bleached Kraft (HWBK, also called LBKP (Laub HoIz Bleached Kraft Pulp and)) or a mixture thereof.
  • SWBK softwood bleached Kraft
  • HWBK also called LBKP (Laub HoIz Bleached Kraft Pulp and)
  • the Kraft pulp to be tmaie ⁇ may be a bleached Kraft pulp, which may consist of softwood bleached Kraft (SWBK 1 also called NBKP (Nadel HoIz Bleached Kraft PuIp)), hardwood bleached Kraft (HWSK, also called LBKP (Laub HoIz Bleached Kraft Pulp and)) or a mixture of these softwood bleached Kraft (SWBK 1 also called NBKP (Nadel HoIz Bleached Kraft PuIp)), hardwood bleached Kraft (HWSK, also called LBKP (Laub HoIz Bleached Kraft Pulp and)) or a mixture of these softwood bleached Kraft (SWBK 1 also called NBKP (Nadel HoIz Bleached Kraft PuIp)), hardwood bleached Kraft (HWSK, also called LBKP (Laub HoIz Bleached Kraft Pulp and)) or a mixture of these softwood bleached Kraft (SWBK 1 also called NBKP (Nadel
  • the pulp to be used in the process of the invention is a suspension of chemical pulp.
  • the pulp to be used in the process of the invention may comprise at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least S0%, at least 90%, at least 95%, or 100% of chemical pulp (such as Kraft pulp or sulfite pulp),
  • chemical pulp such as Kraft pulp or sulfite pulp
  • the percentage of chemical pulp lies within the range of 1 -100%. in particular embodiments, the percentage of chemical pulp (such as Kraft pulp or s ⁇ ime pulp) lies within the range of 1-99%, 2-98%, 3-97%, 4-96%, 5-85%, 8- 94%, 7-93%. 8-92%. 9-91%, 10-90%, 15-85%, 20-80%, 25-75%, 30-70%, 40-60%, or 45-55%.
  • chemical pulp process water is treated with a combination of a lipase and a peroxide source.
  • Such chemical pulp process water contains pitch causing components, such as, fatty acids, triglycerdies.. sterols, steryl esters and/or resin acids (for example, abietic acid).
  • the process of the invention is particularly applicable to the reduction of compounds constituting the pitch during a pulping or paper-making process, e.g. to avoid pitch troubles.
  • Lipases include the enzymes classified by EC 3.1.1 ,3, Ref- erence is made to the Recommendations (1992) of the Nomenclature Committee of the International Union of Biochemistry and Molecular Biology, Academic Press Inc., 1992
  • the lipase is preferably of microbial ori- gin, in particular of bacterial, fungal or yeast origin
  • the iipase may be derived from any source, in- cluding, for example, a strain of Absidia, in particular Absidia blakesleena and Absidia corymbifera, a strain of Achromobacter, in particular Achromobacter iophagus, a strain of Aeromonas, a strain of Altemaria, in particular Altemaria brassiciola, a strain of Aspergillus, in particular Aspergillus niger and Aspergillus flavus, a strain of Achromobrcter, in particular Achromobacter iophagus, a strain of Aureobasidium, in particular Aureobasidium p ⁇ llulans, a strain of Bacillus, in particular Bacillus pumilus, Bacillus sttearothermophilus and Bacillus subtilis,
  • a strain of HumiGola. in particular Humicola brevispora. Humicola brevls var. thermoidea, and Humicola insofens a strain of Hyphozyma, a strain of Lactobacillus, in particular Lactobacillus curvat ⁇ s, a strain of Metarhizium, a strain M ⁇ cor, a strain of Paecilomyces, a strain of Penscilttum.
  • Penic ⁇ llium cydopium Penicillium crustosum and Penidliium ex- pansum
  • Pseudomonas in particular Pseudomonas aeruginosa, Pseudomonas afc&li- genes, Pseudomonas Gapa ⁇ a (syrt. Burkboldeiia cepacia), Pseudomonas ft ⁇ orescens, Pseudomo- nas tragi.
  • Pseudomonas maltophilia Pseudomonas mendocina, Pseudomonas mephitica lipolyfica, Pseudomonas alcaligenes, Pseudomonas plantari. Pseudomonas pseudoalcaligenes.
  • Rhizoctonia in particu- lar Rhizoctonia soiani
  • Rhlzomucor in particular Rhizomucor miehei
  • Rhizopus in particular Rhizopus japonicus
  • Rhizopus microsporus Rhizopus nodosus
  • Rhodosporidium in particular Rhodosporidlum tor ⁇ loides
  • Rhodotorula in particular Rhodotorula glutinis
  • Sporobolomyces in particular Sporobobmyces shibatanus
  • Themomyces in particular Viermomyces lanuglnosus (formerly Humicoia lanuginosa)
  • Thiamsporella in particular Thiarosporeil
  • the lipase is derived from a strain of Aspergillus, a strain of Achromohacter, a strain of Bacillus, a strain of Candida, a strain of Chromobacter, a strain of Fusa- rium, a strain of Humicola, a strain of Hyphozyma, a strain of Pse ⁇ domonas, a strain of Rhizomucor, 3 strain of Rhizopus, or a strain of Thermomyces.
  • Preferred lipases indude the upases described in U.S. Patent No, 6,074.863 and WO
  • Preferred commercial lipases include Resinase A2X and Resinase HT (Novozymes A/S).
  • the lipase is the Candida antarctioa lipase A (CALA) or the Candida antarctica lipase 8 (CALB) (available from Novozymes A/S)
  • a "peroxide source” or “hydrogen peroxide source” refers to hydrogen per- oxide itseif or components which can generate peroxide.
  • the hydrogen peroxide source may be added at the beginning or during the lipase treatment process, e.g., at a concentration of about 0.001-100 mM, particularly 0,01-50 mM.
  • One source of hydrogen peroxide includes precursors of hydrogen peroxide, such as, e.g., a perborate or a percarbonate.
  • Another source of hydrogen peroxide includes enzymes which are able to convert molecular oxygen and an organic or inor- ganic substrate into hydrogen peroxide and the oxidized substrate, respectively.
  • enzymes which are capable of produc- ing hydrogen peroxide include, but are not limited to, glucose oxidase, urate oxidase, galactose oxidase, alcohol oxidase, amine oxidase, amino acid oxidase and cholesterol oxidase.
  • Organic acid ⁇ s may aiso be added to the pulp, e.g., to enhance the pitch treatment.
  • Or- ganic acids refer to any organic substance which contains at least one acidic group. Examples of organic acids are acetic acid, butyric acid, and linoieic acid. The concentration of organic acid is preferably between 0.001-500 mM.
  • the process according to the invention can be carried out at any pulp production stage.
  • the enzyme can be added to any holding tank, e.g, to a promisp storing container (storage chest), storage tower, mixing chest or metering chest.
  • the enzyme treatment is preferably applied before or after pulp bleach process or in between the pulp bleaching stages.
  • the enzyme can be added to the circulated process water (white water) originating from bleaching. In a particular embodiment of a Kraft pulping process, the enzyme is added during the brown-stock washing.
  • process water can include water added as a raw material to the paper manufacturing process; intermediate water products resulting from any step of the process for manufacturing the paper material: as well as waste water as an output or by-product of the process,
  • the process water is, has keen, is being, or is intended for being circulated or re-circulated, i.e., re ⁇ used in another step of the process.
  • water in turn means any aqueous medium, solution, suspension, e.g., ordinary tap water, and tap water in admixture with various additives and adjuvants commonly used in paper manufacturing processes, in a particular embodiment the process water has a low content of solid (dry) matter, e.g,, below 20%, 18%, 16% : 14%, 12%, 10%, 8%, 7%, 6%, S%, 4%, 3%. 20% or below 1% dry matter.
  • dry matter e.g, below 20%, 18%, 16% : 14%, 12%, 10%, 8%, 7%, 6%, S%, 4%, 3%. 20% or below 1% dry matter.
  • the process of t ⁇ e invention may be carried out at conventional conditions in the paper and puSp processing.
  • the process conditions wiii be a function of the enzyrne(s) applied, the reaction time and the conditions given.
  • the enzyme m ⁇ peroxide should be added sn an effective amount.
  • effective amount is meant the amount sufficient to achieve the desired effect of reducing or inhibiting pitch components, such as, by degrading or converting such components into a form which can be more readily removed from the pulp or pulp process water.
  • the dosage of the lipase enzyme Is from about 0,1 mg enzyme protein to about 100.000 mg enzyme protein (of each enzyme) per ton of paper pulp.
  • the enzymatic treatment can be done at consistency, e.g. t 0,5-10 % dry substance, in particular embodiments, the consistency is within the range of 0.5-45; 0.540; 0,5-35; 0.5-30; 0.5- 25; 0.5-20; 0,5-15; 0.5-10; 0,5-8: 0.5-6; or 0.5-5% dry substance.
  • the enzymatic treatment may be carried out at a temperature of from about 10 to about
  • the temperature may be from about 20 to 9G 15 C, or 20 to 95 0 C. preferably from about 40 to 7O 0 C 1 or 40 to 75°C.
  • the enzymatic treatment may be carried out at a pH of from about 2 to about 12. Further examples of pH ranges (all "from about” and “to about”) are the following: 3-12, 4-12, 5-12, 6-12, 1-
  • the pH range may be from about 2 to 11 , preferably within the range from about 3- ⁇ .
  • a suitable duration of the enzymatic treatment may be in the range from a few seconds to several hours, e.g. from about 30 seconds to about 48 hours, or from about 1 minute to about 24 hours, or from about 1 minute to about 16 hours, or from about 1 minute to about 12 hours, or from Bboui 1 minute to S hours, or from about 1 minute to about 2 hours, or from about 1 minute to about 1 hour, or from about 1 minute to about 30 minutes.
  • the reaction time may be from about 10 minutes to 3 hours, 10 minutes to 10 hours, preferably 15 minutes to 1 hour, or 15 minutes to 2 hours,
  • Surfactants and/or dispersants are often present in, and/or added to a papermaking p ⁇ ip.
  • the process and use of the present invention may be carried out in the presence of an anionic, non-ionic, cationic and/or zwilterionic surfactant and/or dispersant conventionally used m a papermaking pulp.
  • anionic surfactants are carboxyiates, sulphates, suiphonates or phosphates of alkyl, substituted alkyl or aryl.
  • Fatty acids are examples of alkykarboxyiates.
  • non-ionic surfactants are poiyoxyethyiene compounds, such as alcohol ethoxyiates, propoxylates or mixed ethoxy-/propoxy Sates, poly-giyeerois and other polyols, as well as certain block-copolymers.
  • cafionic surfactants are wafer-soluble cationic polymers, such as quartenary ammonium sulphates and certain amines, e.g.
  • epichlorohydrin/dimethylamine polymers EPI-DMA
  • cross-linked solutions thereof polydiallyl dimethyl ammonium chioride (DADMAO), DADMAC/Acrylamide co-polymers, and ionene polymers, such as those disclosed in US patents nos. 5,681,862; and 5,575.993.
  • DADMAO polydiallyl dimethyl ammonium chioride
  • DADMAC/Acrylamide co-polymers such as those disclosed in US patents nos. 5,681,862; and 5,575.993.
  • Examples of zwitterionic or amphoteric surfactants are Detains, glycinaies, amino propionates, imino propionates and various imidazolin-derivatives.
  • the polymers disclosed in US patent no. 5,256,252 may be used.
  • surfactants such as the above, including any combination thereof may be used in a paper making process.
  • the amount of each surfactant in such composition may amount io from about 8 to about 40% (w/w) of the composition, in particular embodiments the amount of each surfactant is from about 10 to about 38, or from about 12 to about 36, or from about 14 to about 34, or from about 16 to about 34, or from about 18 to about 34, or from about 20 to about 34, or from about 22 to about 34, or from about 24 to about 34, or from about 26 to about 34, or from about 23 to about 32% ⁇ w/w ⁇ -
  • enzyme encompass wild-type enzymes, as well as any variant thereof that re- tains the activity in question. Such variants may be produced by recombinant techniques.
  • the wild-type enzymes may also be produced by recombinant techniques, or by isolation and purifica- tion from the natural source.
  • the enzyme in question is well-defined, meaning that only one major enzyme component is present. This can be inferred e.g. by fractionation on an appropriate Size-exclusion column. Such weii-deftned, or purified, or highly purified, enzyme can be obtained as is known in the art and/or described in publications relating to the specific enzyme in question.
  • the term “applied together with” means that the additional enzyme may be applied in the same-, or in another step of the process of the invention.
  • the other process step may be upstream or downstream in the paper manufacturing process, as compared to the step in which the papermaking, pulp or process water is treated with lipase and peroxide source, in particular embodiments the additional enzyme is an enzyme which has protease, xy- larsase, cutinase, oxidoreductase, cellulase, endogiucanase, amylase, mannartase, steryl es- terase, and/or cholesterol esterase activity.
  • oxidoreductase enzymes are enzymes with Iaccase, and/or peroxidase activity.
  • a step of a process means at least one step, and it could be one, two, three, four, five or even more process steps.
  • the lipase and peroxide source may be applied in at least one process step, and the additional enzyme(s) may also be applied in at least one process step, which may be the same or a different process step as compared to the step where the lipase an ⁇ peroxide source is used.
  • enzyme preparation means a product containing at ieast one lipase enzyme.
  • a preparation preferably contains at least one adjuvant
  • adjuvants which are used in enzyme preparations for the paper and pulp industry, are buffers, polymers, surfactants and stabilizing agents.
  • Any enzyme having protease, xylanase, cutinase, oxidoreductase, cellulase endogiuca- nase, amylase, mannanase, steryl esterase, and/or cholesterol esterase activity can be used as additional enzymes in the use and process of the invention. Selow some non ⁇ iimiting examples are listed of sued additional enzymes.
  • the enzymes written in capitals are commercial enzymes available from Novozymes A/S. KrogshoejveJ 36. DK-2880 Bagsvaerd, Denmark, The activity of any of those additional enzymes can be analyzed using any method known in the art for the en- zyme in question, including the methods mentioned in the references cited.
  • cutinases are those derived from Humicola insolens (US 5,627,71 S); from a strain of FuSBnUm 1 e.g. F. roseum cutmorum, or particularly F. s ⁇ lani pisi (WO 80/09446; WO 94/14964, WO 94/03578).
  • the cutinase may also be derived from a strain of Fthizoctonia, e.g. R. sol ⁇ nh or a strain of Attemaria, e.g. A, hrassicicola (WO 94/03578), or variants thereof such as those described in WO 00/34450, or WO 01/92502,
  • proteases are the ALCALASE, ESPERASE, SAVINASE, NEUTRASE and DURAZYM proteases.
  • Other proteases are derived from Nocardiopsis, Aspergillus, Rhlzopus, Ba- citkis afcafophiius, B. oereus, B. natto, B, vulgatus, B. myoolde, and subtHisins from Bacillus, es- pecially proteases from the species Nooardiopsis sp, and Nocar ⁇ ' opsis dessertvillei such as those disclosed in WO 88/03947, and mutants thereof, e.g. those disclosed in WO 91/00345 and SP 415286.
  • amylases are the BAN, AQUAZYM, TERMAiVIYL, and AQUAZYM Ultra amy- fases.
  • Art example of a xyianase is the PULPZYME HC hemscelluiase.
  • Examples of endogluca- nases are the NOVOZYM 613, 342, and 476 enzyme products.
  • mannanases examples include the Tnchoderma reesei endo-foeta-mannanases described in St ⁇ hlbrand et ai. J. Biotechnoi. 29 (1893), 229-242.
  • steryl esterases examples include steryl esterases, peroxidases, laccases, and cholesterol esterases.
  • oxi- doreducfases are the peroxidases and laccases disclosed In EP 730641; WO 01/98469; EF 719337; EP 765394; EP 767 ⁇ 3Q; EP 763115; and EP 7S8547, in the present context, whenever an oxtdoreductase enzyme is mentioned that requires or benefits from the presence of acceptors, enhancers., mediators and/or activators, such compounds should foe considered to be included if not already present Examples of enhancers and mediators are disclosed in EP 705327; WQ 98/56899; EP 677102; SP 7S1326: and EP 707637.
  • an ⁇ xidoreductase enzyme system ⁇ e.g. a laccase, or a peroxidase enzyme system
  • an ⁇ xidoreductase enzyme system ⁇ e.g. a laccase, or a peroxidase enzyme system
  • an enhancer and/or mediator for the enzyme in question ⁇ its acceptor, and optionally also an enhancer and/or mediator for the enzyme in question.
  • a process for reducing deposition of pitch in t ⁇ e paper making process wherein the process comprises treating the pulp and/or process water with a lipase, a peroxide source and organic acid.
  • Dammar resin was obtained from Fluka and used as a model pitch to simulate Kraft pulp pitch.
  • TAED was also obtained from Fluka. Put 75 mg of Dammar resin in a flask and add 75 mL of Dl water. Add chemicals or enzymes according to the conditions shown in Table 1. Stir at ambient temperature overnight. Turbidity of the solutions was determined by UV-vis at 600 nm.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Enzymes And Modification Thereof (AREA)

Abstract

La présente invention concerne des compositions et des procédés pour le traitement de problèmes de poix dans une pâte chimique par traitement de l'eau de traitement de la pâte chimique avec un mélange d'une lipase et d'une source de peroxyde. La présente invention concerne également des compositions et des procédés pour le traitement de problèmes de poix dans une pâte chimique par traitement de l'eau de traitement de la pâte chimique avec une lipase, une source de peroxyde et un ou des acides organiques.
PCT/US2007/062136 2006-02-14 2007-02-14 Procedes et compositions de traitement de pate chimique WO2007095575A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP07717616A EP1994219A1 (fr) 2006-02-14 2007-02-14 Procedes et compositions de traitement de pate chimique
BRPI0707656-8A BRPI0707656A2 (pt) 2006-02-14 2007-02-14 mÉtodo para reduzir problemas de breu em uma polpa quÍmica, e, uso de uma lipase e de uma fonte de peràxido
CA002637691A CA2637691A1 (fr) 2006-02-14 2007-02-14 Procedes et compositions de traitement de pate chimique
AU2007214449A AU2007214449A1 (en) 2006-02-14 2007-02-14 Chemical pulp treatment compositions and methods
US12/160,898 US20090065159A1 (en) 2006-02-14 2007-02-14 Chemical pulp treatment compositions and methods
JP2008554548A JP2009526919A (ja) 2006-02-14 2007-02-14 化学パルプ処理組成物及び方法
NO20083436A NO20083436L (no) 2006-02-14 2008-08-05 Kjemisk papirmassebehandling, sammensetning og metoder

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US77324206P 2006-02-14 2006-02-14
US60/773,242 2006-02-14

Publications (1)

Publication Number Publication Date
WO2007095575A1 true WO2007095575A1 (fr) 2007-08-23

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PCT/US2007/062136 WO2007095575A1 (fr) 2006-02-14 2007-02-14 Procedes et compositions de traitement de pate chimique

Country Status (9)

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US (1) US20090065159A1 (fr)
EP (1) EP1994219A1 (fr)
JP (1) JP2009526919A (fr)
CN (1) CN101384769A (fr)
AU (1) AU2007214449A1 (fr)
BR (1) BRPI0707656A2 (fr)
CA (1) CA2637691A1 (fr)
NO (1) NO20083436L (fr)
WO (1) WO2007095575A1 (fr)

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US7951267B2 (en) * 2001-05-21 2011-05-31 Kim Borch Enzymatic hydrolysis of a polymer comprising vinyl acetate monomer
EP2534254A4 (fr) * 2010-02-08 2014-01-22 Iogen Energy Corp Procédé d'élimination des incrustations lors d'un processus de conversion d'une biomasse lignocellulosique
CN103998680A (zh) * 2011-10-27 2014-08-20 巴科曼实验室国际公司 用于酶降解处理造纸纤维的方法和组合物及由其制成的纸制品

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EP1880053B1 (fr) * 2005-05-04 2019-07-31 Novozymes North America, Inc. Compositions et procedes de traitement au dioxyde de chlorure
MX2012013931A (es) * 2010-06-08 2013-01-24 Buckman Labor Inc Metodos para degradar fango de la fabricacion de pulpa y papel.
CN104662225B (zh) * 2012-06-22 2017-07-28 巴克曼实验室国际公司 在造纸过程中使用脂肪酶和氧化剂的组合控制沥青的方法及其制品
CN103243601A (zh) * 2013-04-27 2013-08-14 陕西科技大学 一种脂肪酶、NaOH、滑石粉组合处理马尾松热磨机械浆树脂的方法
CN104088184B (zh) * 2014-06-26 2017-01-11 孔慧 一种洗浆助剂及其制浆工艺方法
CN109610217A (zh) * 2016-10-19 2019-04-12 瑞辰星生物技术（广州）有限公司 制浆造纸生产中控制有机污染物沉积的组合物
CN106480771B (zh) * 2016-12-23 2018-12-04 江南大学 一种利用角质酶处理造纸白水的方法
CN109722422A (zh) * 2018-12-31 2019-05-07 苏州埃斯腾特生物科技有限公司 耐高温脂肪酶及其用途

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CN101384769A (zh) 2009-03-11
EP1994219A1 (fr) 2008-11-26
BRPI0707656A2 (pt) 2011-05-10
AU2007214449A1 (en) 2007-08-23

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