Preparation method of water-absorbing resin from silkworm litter

A technology of water-absorbent resin and silkworm sand, applied in the field of water-absorbent resin, can solve the problems of high polymerization reaction temperature, high cost, not easy to degrade, etc., and achieves the effects of simple preparation method, prevention of waste and pollution, and easy operation.

Inactive Publication Date: 2015-01-07
GUANGXI SOURCE OF THE FERTILIZER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of high polymerization reaction temperature, high cost, and difficult degradation in the production of existing water-absorbing resins, the present invention provides a method for preparing water-absorbing resins using silkworm excrement as a raw material, so as to obtain water-absorbing resins that are beneficial to the quality of agricultural soil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A. First crush the silkworm excrement, then place it at 600°C for conventional pyrolysis and dry distillation to obtain dry distillation gas and residue;

[0021] B. According to the liquid-solid ratio (mL / g) of 3:1, mix the residue obtained in step A with acrylic acid, and stir and hydrolyze at 5°C to obtain mixture I;

[0022] C. The dry distillation gas in step A is condensed to obtain an extract, and the mass ratio of tapioca starch:extract is 1:12, stirred and mixed, heated to 80° C. under the protection of nitrogen, stirred and reacted for 10 minutes, and mixture II is obtained;

[0023] D, get 15% ammonium sulfate of silkworm excrement quality, then according to the liquid-solid ratio (mL / g) of ammonium sulfate and dimethyl sulfoxide is 1:1, mix the two evenly, i.e. mixture III;

[0024] E. According to the mass ratio of methylene bisacrylamide: water is 1:20, dissolve methylene bisacrylamide in water, then mix the solution with the mixture II obtained in step C,...

Embodiment 2

[0027] A. First crush the silkworm excrement, then place it at 500°C for conventional pyrolysis and dry distillation to obtain dry distillation gas and residue;

[0028] B. According to the liquid-solid ratio (mL / g) of 4:1, mix the residue obtained in step A with acrylic acid, and stir and hydrolyze at 0°C to obtain mixture I;

[0029] C. Condensing the dry distillation gas in step A to obtain an extract, stirring and mixing according to the mass ratio of cornstarch:extract of 1:15, heating to 80° C. under nitrogen protection, and stirring for 5 minutes to obtain mixture II;

[0030] D, get 20% ammonium sulfate of silkworm excrement quality, then be 2:1 according to the liquid-solid ratio (mL / g) of ammonium sulfate and dimethyl sulfoxide, mix the two evenly, i.e. mixture III;

[0031] E. According to the mass ratio of methylene bisacrylamide: water is 1:5, dissolve methylene bisacrylamide in water, then mix the solution with the mixture II obtained in step C, and then add the ...

Embodiment 3

[0034] A. First crush the silkworm excrement, then place it at 800°C for conventional pyrolysis and dry distillation to obtain dry distillation gas and residue;

[0035] B. According to the liquid-solid ratio (mL / g) of 1:1, mix the residue obtained in step A with acrylic acid, and stir and hydrolyze at 10°C to obtain mixture I;

[0036] C. Condensing the retort gas in step A to obtain an extract, stirring and mixing according to the mass ratio of potato starch:extract of 1:5, heating to 80° C. under nitrogen protection, and stirring for 8 minutes to obtain mixture II;

[0037] D, get 5% ammonium sulfate of silkworm excrement quality, then be 1.5:1 according to the liquid-solid ratio (mL / g) of ammonium sulfate and dimethyl sulfoxide, the two are mixed homogeneously, i.e. mixture III;

[0038] E. According to the mass ratio of methylene bisacrylamide: water is 1:50, dissolve methylene bisacrylamide in water, then mix the solution with the mixture II obtained in step C, and then ...

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Abstract

The invention provides a preparation method of a water-absorbing resin from silkworm litter, which comprises the following steps: carrying out conventional pyrolysis carbonization on the silkworm litter to obtain retort gas and residues; mixing the residues with acrylic acid, and stirring at low temperature for hydrolysis to obtain a mixture I; condensing the retort gas to obtain an extracting solution, mixing with starch, and heating in a nitrogen protective atmosphere to obtain a mixture II; evenly mixing ammonium sulfate and dimethyl sulfoxide to obtain a mixture III; and dissolving methylene bis acrylamide in water, evenly mixing the solution with the mixture II, sequentially adding the mixture I and mixture III, stirring, and heating with microwaves to obtain the water-absorbing resin. The method utilizes the waste resources, implements resource reutilization, and is simple and easy to operate and low in energy consumption. The water-absorbing resin has the advantages of high efficiency, strong adaptability, moth resistance and the like, is degradable, and is applicable to the industries of agriculture, horticulture, medicine, hygiene and the like.

Description

technical field [0001] The invention relates to a method for preparing a water-absorbing resin using silkworm excrement as a raw material, and belongs to the technical field of water-absorbing resins. Background technique [0002] Water-absorbing resin is a new type of functional polymer material. It has a high water absorption function of absorbing water hundreds to thousands of times heavier than itself, and has excellent water retention performance. Once it absorbs water and swells into a hydrogel, it is difficult to separate the water even if it is pressurized. Superabsorbent resin is a functional polymer material with a large number of hydrophilic groups. With its high liquid absorption capacity, high liquid absorption speed and high liquid retention capacity, it is widely used in medical and sanitary products, agricultural gardens, and construction industries. [0003] Superabsorbent resins used in agriculture and horticulture are also called water retaining agents a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/06C08F222/38C08F2/44
Inventor 陈作军王修海
Owner GUANGXI SOURCE OF THE FERTILIZER IND
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