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Method for synthesizing high-molecular water-absorbent resin from cottonseed byproduct

A technology for synthesizing polymers and water-absorbing resins, which is applied in the field of functional superabsorbent resins, can solve the problems of protein resources not being well utilized and protein resources being wasted, and achieve development and utilization value, prevent soil erosion, and improve aggregate structure. Effect

Inactive Publication Date: 2016-12-07
山东中商研高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this protein resource has not been well utilized in our country, and 80% of cottonseed is forced to be used as a fertilizer or a medium for edible fungi, resulting in a waste of protein resources

Method used

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  • Method for synthesizing high-molecular water-absorbent resin from cottonseed byproduct

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for synthesizing a polymer water-absorbent resin from cottonseed by-products, the specific steps are as follows:

[0027] (1) 120g of acrylic acid is dissolved in 50ml of deionized water to form an aqueous solution of acrylic acid;

[0028] (2) 40g sodium hydroxide is dissolved in 150ml deionized water to form a sodium hydroxide solution;

[0029] (3) Slowly add the sodium hydroxide solution dropwise to the acrylic acid aqueous solution at room temperature until the degree of neutralization is 75%;

[0030] (4) Cool to room temperature, add 0.036g cross-linking agent N-N' methylenebisacrylamide, fully stir evenly, obtain the mixed liquid of monomer and cross-linking agent;

[0031] (5) Add 15g of cottonseed meal powder into a three-neck flask equipped with a stirrer, add 150g of distilled water, and stir and gelatinize in a constant temperature water bath at 60°C for 15min;

[0032] (6) Regulate the pH of mixed solution to 8.5 with sodium hydroxide solution, ...

Embodiment 2

[0036] Specific steps are as follows:

[0037] (1) 120g of acrylic acid is dissolved in 50ml of deionized water to form an aqueous solution of acrylic acid;

[0038] (2) 50g sodium hydroxide is dissolved in 150ml deionized water to form a sodium hydroxide solution;

[0039] (3) Slowly add the sodium hydroxide solution dropwise to the acrylic acid aqueous solution at room temperature until the degree of neutralization is 75%;

[0040] (4) Cool to room temperature, add 0.036g cross-linking agent N-N' methylenebisacrylamide, fully stir evenly, obtain the mixed liquid of monomer and cross-linking agent;

[0041] (5) Add 20g of cottonseed meal powder into a three-necked flask equipped with a stirrer, add 100g of distilled water, and stir and gelatinize in a constant temperature water bath at 80°C for 30min;

[0042] (6) Regulate the pH of the mixed solution to 8.0 with sodium hydroxide solution, and feed nitrogen for 20min, then add 0.2g initiator potassium persulfate;

[0043] ...

Embodiment 3

[0046] Specific steps are as follows:

[0047] (1) 150g of acrylic acid is dissolved in 50ml of deionized water to form an aqueous solution of acrylic acid;

[0048] (2) 50g sodium hydroxide is dissolved in 150ml deionized water to form a sodium hydroxide solution;

[0049] (3) Slowly add the sodium hydroxide solution dropwise to the acrylic acid aqueous solution at room temperature until the degree of neutralization is 75%;

[0050] (4) Cool to room temperature, add 0.036g of cross-linking agent N-N' methylenebisacrylamide, fully stir evenly, and obtain a mixed liquid of monomer and cross-linking agent;

[0051] (5) Add 15g of cottonseed meal powder into a three-necked flask equipped with a stirrer, add 100g of distilled water, and stir and gelatinize in a constant temperature water bath at 60°C for 30min;

[0052] (6) Regulate the pH of mixed solution to 8.0 with sodium hydroxide solution, and pass into nitrogen 20min, then add 0.19g initiator potassium persulfate;

[005...

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Abstract

The invention discloses a method for synthesizing high-molecular water-absorbent resin from a cottonseed byproduct. The method comprises the following steps: slowly adding a sodium hydroxide solution to an aqueous acrylic acid solution in a dropwise manner at room temperature until the neutralization value is 75%, cooling the neutralized solution, and adding a cross-linking agent N-N'-methylenebisacrylamide to obtain a monomer and cross-linking agent mixed solution; adding distilled water to cottonseed meal, stirring the distilled water and the cottonseed meal in constant-temperature water bath to gelatinize the cottonseed meal, adjusting the above obtained mixed solution to be alkaline by using the sodium hydroxide solution, introducing nitrogen, adding an initiator potassium persulfate, stirring, adding the prepared monomer and cross-linking agent mixed solution, continuously stirring until the obtained reaction mixed solution is thickened, immediately pouring the reaction mixed solution to a pallet, and carrying out a reaction in the constant-temperature water bath to obtain polymer gel; and taking out the polymer gel, cutting the polymer gel, carrying out vacuum drying, crushing the dried polymer gel, screening the crushed polymer gel, and packaging the screened polymer gel to obtain the target product. The product has the advantages of strong water absorption effect, small volume expansion, excellent compressive strength, good heat stability, slow degradation speed and harmlessness to crops, and is especially suitable for oilfield and the agriculture.

Description

technical field [0001] The invention relates to the technical field of functional superabsorbent resins, in particular to a method for synthesizing high-molecular water-absorbent resins from cottonseed by-products. Background technique [0002] my country is the world's largest cotton-producing country, with an annual output of more than 8 million tons of cottonseed. Cottonseed after oil extraction is rich in protein, which can reach 38%-45%. Based on this calculation, the annual output of cottonseed after oil extraction in my country exceeds 4 million tons, containing about 1.6 million tons of protein, which shows that the resources are very rich. However, this protein resource has not been well utilized in our country, and 80% of cottonseed is forced to be used as a fertilizer or a medium for edible fungi, resulting in a waste of protein resources. [0003] Combined with the application of the existing natural protein preparation superabsorbent resin technology, in order ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F289/00C08F220/06C08F2/44
Inventor 曹灿贾凡信
Owner 山东中商研高分子材料有限公司
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