CN106146763A - A kind of method of Fructus Gleditsia full powder synthesis hydroscopic high-molecular resin - Google Patents

Abstract

The invention discloses a method for synthesizing high-molecular water-absorbing resin with whole powder of saponins, comprising preparing sodium acrylate solution; putting whole powder of saponins and water into a reaction kettle, gelatinizing at 80°C for 1 hour, and cooling to 40°C; Put the sodium acrylate solution with cross-linking agent into the reaction kettle, stir for 30 minutes under nitrogen atmosphere, replace the nitrogen with oxygen, and then add the initiator; heat up to 55-65°C for 1 hour; cool to room temperature, dry, split, 70°C Drying, crushing, sieving and packaging. The invention can be applied to large-scale production, expands the utilization value of saponins, has the advantages of low manufacturing cost, simple production control and good performance of the obtained water-absorbent resin. The soil water-retaining agent prepared with superabsorbent resin as the base material has good water-absorbing performance. The water absorption multiple is ≥450, and the water retention capacity is ≥40. It has good water and moisture retention performance for the soil, and the water retention performance can last for many years. It can also improve the aggregate structure of the soil and increase the air permeability and water permeability of the soil.

Description

A method for synthesizing polymer water-absorbing resin from saponin whole powder

technical field

The invention relates to the field of water-absorbing resins, in particular to a method for synthesizing high-molecular water-absorbing resins from saponin whole powder.

Background technique

Acacia fruit is a natural raw material for medicine, food, health products, cosmetics and cleaning products. In addition, acacia seeds can digest food and appetizers, and contain guar gum; acacia thorns (soap needles) contain flavonoid glycosides, phenols, and amino acids, which have high economic value. Acacia seeds are rich in galactomannan gum and protein components, and galactomannan gum is used as a thickener, stabilizer, binder, gelling agent, and flotation agent because of its unique rheological properties , flocculants, dispersants, etc., are widely used in petroleum drilling, food and medicine, textile printing and dyeing, mining ore dressing, military explosives, daily chemical ceramics, architectural coatings, wood processing, papermaking, pesticides and other industries. The gum content in the seeds is as high as 30% ^to 40%, and the protein content in the leftovers of the gum locust is higher than 30%, which can be used to make feed materials or extract green protein. Acacia beans are rich in crude protein and polysaccharides, and their oil content exceeds that of soybeans. The wood of the honey locust tree is solid, rot-resistant and wear-resistant, yellowish brown or mixed with red stripes, and can be used to make handicrafts and furniture.

Polymer water-absorbent resin is a new type of polymer functional material developed in recent years. Due to its strong water absorption, it has the ability to absorb hundreds of times or even thousands of times its own weight, and releases the absorbed water when it is dry, so it can be used in industries. , agriculture and daily life and other aspects have been applied. Wang Cunguo, He Lixia and others used the water absorption rate of cotton stalks, wheat straws, corn stalks and acrylic acid to deionized water in the preparation of high-rate water-absorbing resins by grafting and copolymerizing cellulose-rich crop stalks and acrylic acid. Sun Lin, Wang Cunguo, et al. used wheat straw and acrylic acid graft copolymerization to prepare salt-tolerant water-absorbent resin, carried out structural characterization, and studied monomer ratio, acrylic acid neutralization degree, initiator and crosslinking agent dosage and reaction temperature. Influence on saline absorption rate.

The invention discloses a method for preparing superabsorbent resin by using saponins, and opens up a way for the deep processing and application of saponins products. In the tailings pond, after all the heavy metals are extracted and added to the polymer water-absorbing resin, it can realize the reclamation of cultivated land, greening, afforestation, sandy soil transformation, and achieve the purpose of heavy metal pollution control. At the same time, it can also be used for pollution control of fly ash accumulation sites After treatment, it can realize re-cultivation and generate huge profits for the enterprise.

Contents of the invention

The object of the present invention is to provide a method for synthesizing polymeric water-absorbing resin from saponins whole powder, so as to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

A method for synthesizing a polymer water-absorbing resin from saponin whole powder, the specific steps comprising:

1) Prepare sodium acrylate solution; dissolve 120g of acrylic acid in 50ml of deionized water to form an acrylic acid solution; dissolve 50-60g of sodium hydroxide in 150ml of water to form a sodium hydroxide solution, mix the acrylic acid solution and the sodium hydroxide solution to prepare A sodium acrylate solution with a neutralization degree of 75%-90% is obtained;

2) Put 4-8g saponins whole powder and 50ml water into the reaction kettle, gelatinize at 80°C for 1 hour, cool down to 40°C; add 0.1-0.2g cross-linking agent to sodium acrylate solution, and add cross-linking The sodium acrylate solution of the coupling agent is placed in a reaction kettle, stirred for 30min under a nitrogen atmosphere,

3) Replace nitrogen with oxygen to make the reactor an oxygen environment, then add 0.1-0.2g initiator; heat up to 55-65°C for 1 hour;

4) Cool to room temperature; dry until the moisture content is 5-15%, divide, dry at 70°C, pulverize, pass through a 150-mesh sieve, and pack.

As a further solution of the present invention: the cross-linking agent uses N,N'-methylenebisacrylamide solution.

As a further solution of the present invention: the initiator uses potassium persulfate.

Compared with the prior art, the beneficial effects of the present invention are: the method for synthesizing polymeric water-absorbing resin for a saponin product provided by the present invention can be applied to large-scale production, expands the utilization value of saponin, and has the advantages of low cost A little bit, the production control is simple, and the performance of the obtained water-absorbent resin is good. The soil water-retaining agent prepared by using the high water-absorbing resin prepared by the method of the invention as a base material has good water-absorbing performance. The water absorption multiple is ≥450, and the water retention capacity is ≥40. It has good water and moisture retention performance for the soil, and the water retention performance can last for many years. Polymer water-absorbent resin not only has excellent water absorption and water retention, but as a soil improver and water retention agent, it can also improve the aggregate structure of the soil, increase the air permeability and water permeability of the soil, and reduce the temperature difference between the day and night of the soil. At the same time, it can also absorb fertilizers and pesticides, prevent fertilizers, pesticides and soil erosion, and slowly release fertilizers, agriculture and water, improve the effects of fertilizers and pesticides, and greatly enhance drought resistance.

Description of drawings

Fig. 1 is a process flow diagram of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

Please refer to Fig. 1, in the embodiment of the present invention, a method for synthesizing polymeric water-absorbing resin from saponin whole powder, the specific steps include:

1) Dissolve 120 grams of acrylic acid in 50 ml of deionized water to form an acrylic acid solution.

2) Dissolve 50 grams of sodium hydroxide with 150 ml of water to become a sodium hydroxide solution.

3) Slowly add sodium hydroxide solution into the acrylic acid solution to prepare a sodium acrylate solution with a neutralization degree of 75% for later use.

4) Put 4 grams of saponins whole powder and 50 ml of distilled water into a 250 ml three-neck flask for gelatinization at 80°C for 1 hour, and cool down to 40°C.

5) Add 0.15 g of cross-linking agent N, N'-methylenebisacrylamide solution to the sodium acrylate solution with a neutralization degree of 75%, put it into a three-necked flask, stir for 30 minutes under a nitrogen atmosphere, and then replace the nitrogen Oxygen makes the inside of the reactor into an oxygen atmosphere, and then adds 0.15 g of initiator potassium persulfate. Raise the temperature to 55°C for 1 h, then cool to room temperature.

6) Dry to an appropriate level, divide, dry at 70°C, pulverize, sieve with 150 mesh and pack.

Example 2

Please refer to Fig. 1, in the embodiment of the present invention, a method for synthesizing polymeric water-absorbing resin from saponin whole powder, the specific steps include:

1) Dissolve 120 grams of acrylic acid in 50 ml of deionized water to form an acrylic acid solution.

2) Dissolve 60 grams of sodium hydroxide with 150 ml of water to become a sodium hydroxide solution.

3) Slowly add sodium hydroxide solution into the acrylic acid solution to prepare a sodium acrylate solution with a neutralization degree of 90%.

4) Put 8 grams of saponins whole powder and 50ml of distilled water into a 250ml three-neck flask for gelatinization at 80°C for 1 hour, then cool down to 40°C.

5) Add 0.1 g of cross-linking agent N, N'-methylenebisacrylamide solution to the sodium acrylate solution with a neutralization degree of 90%, put it into a three-necked flask, stir for 30 minutes under a nitrogen atmosphere, and then replace the nitrogen Oxygen makes the interior of the reactor into an oxygen atmosphere, and then adds 0.2 g of initiator potassium persulfate. Raise the temperature to 55°C for 1 h, then cool to room temperature.

6) Dry to an appropriate level, divide, dry at 70°C, pulverize, sieve with 150 mesh and pack.

Example 3

Please refer to Fig. 1, in the embodiment of the present invention, a method for synthesizing polymeric water-absorbing resin from saponin whole powder, the specific steps include:

1) Dissolve 120 grams of acrylic acid in 50 ml of deionized water to form an acrylic acid solution.

2) Dissolve 60 grams of sodium hydroxide with 150 ml of water to become a sodium hydroxide solution.

3) Slowly add sodium hydroxide solution into the acrylic acid solution to prepare a sodium acrylate solution with a neutralization degree of 90%.

4) Put 8 grams of saponins whole powder and 50ml of distilled water into a 250ml three-neck flask for gelatinization at 80°C for 1 hour, then cool down to 40°C.

5) Add 0.2 g of cross-linking agent N, N'-methylenebisacrylamide solution to the sodium acrylate solution with a neutralization degree of 90%, put it into a three-necked flask, stir for 30 minutes under a nitrogen atmosphere, and then replace the nitrogen Make the inside of the reactor an oxygen environment for oxygen, and then add 0.1 g of initiator potassium persulfate. Raise the temperature to 65°C for 1 h, then cool to room temperature.

6) Dry to an appropriate level, divide, dry at 70°C, pulverize, sieve with 150 mesh and pack.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (3)

1. the method for a Fructus Gleditsia full powder synthesis hydroscopic high-molecular resin, it is characterised in that concrete steps include:

1) configuration sodium acrylate solution；The acrylic acid of 120g is dissolved in 50ml deionized water, forms acrylic acid solution； 50-60g sodium hydroxide 150ml water dissolution is become sodium hydroxide solution, acrylic acid solution is mixed with sodium hydroxide solution Preparing degree of neutralization after conjunction is the sodium acrylate solution of 75%-90%；

2) complete for 4-8g Fructus Gleditsia powder and 50ml water are inserted in reactor, and at 80 DEG C of gelatinizing 1h, be cooled to 40 DEG C；To third Olefin(e) acid sodium solution adds 0.1-0.2g cross-linking agent, and the sodium acrylate solution adding cross-linking agent is inserted in reactor, 30min is stirred under nitrogen atmosphere,

3) displacement nitrogen is to become oxygen atmosphere in oxygen makes reactor, adds 0.1-0.2g initiator；It is warming up to 55-65 DEG C reaction 1h；

4) it is cooled to room temperature；Being dried to biodiversity content is 5-15%, segmentation, 70 DEG C of drying, pulverizes, mistake 150 mesh sieves, Pack and get final product.

The method of Fructus Gleditsia the most according to claim 1 full powder synthesis hydroscopic high-molecular resin, it is characterised in that described friendship Connection agent uses N, N '-methylene-bisacrylamide solution.

Fructus Gleditsia the most according to claim 1 full powder synthesis hydroscopic high-molecular resin method, it is characterised in that described in draw Send out agent and use potassium peroxydisulfate.