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Composite type soil water retention agent and preparation

A soil water-retaining agent and water-retaining agent technology, applied in other chemical processes, chemical instruments and methods, etc., can solve the problems of weak gel strength, short service life, poor salt and alkali resistance, etc., to prevent soil compaction and improve utilization efficiency. , the effect of improving soil structure

Inactive Publication Date: 2009-06-24
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A number of water-retaining agents that have been successfully developed in China are mostly divided into three categories: starch, cellulose and acrylic. Starch-based water-retaining agents have high water absorption, but they also have poor salt and alkali resistance and low gel strength. Problems such as short service life in practical applications
For example, the Chinese patent CN1359974 uses acrylamide and potassium acrylate to copolymerize, and the additives are kaolin and bentonite to prepare a superabsorbent composite resin. It is obviously weaker than the gel strength of the composite material in which the inorganic filler and the organic monomer exist in the form of graft copolymerization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1 kg of wood bran, 10 kg of peanut cake, 3 kg of lignite, and 0.005 kg of yeast are crushed and added to about 1.5 kg of diluted urea solution (the weight concentration of urea solution is 10%) for mixing, and after mixing, stack and ferment at room temperature for two weeks (or use fermentation equipment to ferment, the fermentation time can be shortened to 24-72 hours), after that, dry it in the air for three days (or dry it with a drying mechanism), and become a dry product of about 10 kg (organic matter ≥ 70%), And carry out secondary pulverization, cross 100 mesh sieves.

[0020] Soak 3 kg of attapulgite in 10% hydrochloric acid by weight for 24 hours, dry at 120°C until constant weight, and crush it for later use.

[0021] Add 8 kg of cornstarch to distilled water, gelatinize at 95°C for 30 minutes, cool down to 40°C, add 3 kg of attapulgite, 10 kg of organic matter, 0.3 kg of initiator potassium persulfate, 20 kg of acrylamide, 0.07 kg of cross-linking agent pol...

Embodiment 2

[0024] Put 10 grams of wood bran, 150 grams of bean cake, 35 grams of lignite, and 0.07 grams of yeast. After crushing, add 20 grams of urea solution with a total concentration of 10% for stirring. The time can be shortened to 24-48 hours), and then dried in the air for three days (or dried with a dryer), becoming a dry product of about 140 grams, which is pulverized for the second time and passed through a 100-mesh sieve.

[0025] Soak 78 grams of attapulgite in hydrochloric acid with a total concentration of 10% for 24 hours, bake at 120° C. to constant weight, and grind it for later use.

[0026] Add 150 grams of cornstarch into distilled water, gelatinize at 95°C for 30 minutes, cool down to 40°C, add 78 grams of attapulgite, 140 grams of organic matter, 6 grams of initiator ammonium sulfate, 120 grams of acrylamide, 2 gram of crosslinking agent polyethylene glycol diglycidyl ether, 30 grams of expanded perlite and 1L of water, raise the temperature to 50-70°C and keep for...

Embodiment 3

[0029] Put 25 grams of wood bran, 375 grams of bean cake, 90 grams of peat, and 0.2 grams of yeast. After crushing, add 50 grams of urea solution with a total concentration of 10% for stirring. The time can be shortened to 24-48 hours), and then dried in the air for three days (or dried with a dryer), becoming a dry product of about 340 grams, which is pulverized for the second time and passed through a 100-mesh sieve.

[0030] Soak 200 grams of attapulgite in hydrochloric acid with a total concentration of 10% for 24 hours, bake at 120° C. to constant weight, and grind it for later use.

[0031] Add 375 grams of cornstarch into distilled water, gelatinize at 95°C for 30 minutes, cool down to 40°C, add 200 grams of attapulgite, 340 grams of organic matter, 15 grams of initiator ammonium sulfate, 300 grams of acrylamide, 5 1 gram of crosslinking agent polyethylene glycol diglycidyl ether, 75 grams of expanded perlite and 3 L of water, the temperature is raised to 50-70 ℃ and ke...

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PUM

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Abstract

The invention relates to a soil water retaining agent, in particular to a starch and a cellulose compound water retaining agent and preparation thereof, comprising the ingredients, based on parts by weight of: 100-200 parts of organic substances, 0.2-3 parts of active covering agent, 150-200 parts of acrylamide, 50-100 parts of starch, 20-50 parts of attapulgite, 20-40 parts of perlite, 2-4 parts of initiators and 0.5-1 part of crosslinking agent. The compound soil water retaining agent of the invention simultaneously retains the advantages of starch and cellulose water retaining agents, and can play a role of improving the soil structure owing to the addition of equivalent organic materials therein; the addition of humic acid is capable of serving as a urease inhibitor to a certain extent, which enhances the utilization ratio of a fertilizer N that is applied along with the water retaining agent.

Description

technical field [0001] The invention relates to a soil water-retaining agent, in particular to a starch-cellulose composite water-retaining agent and its preparation. Background technique [0002] China is a large agricultural country, and it is also a country with the largest arid and semi-arid area. Therefore, drought resistance and moisture conservation are an important link in agricultural production. The water-retaining agents currently used in agricultural production have good water-retaining and anti-aging properties, and have achieved good results in solving crop water shortages and desertification control. Water-retaining agent is also called water-absorbing agent and humectant. The research on agriculture and forestry began in the late 1980s, and its structure has network molecular chains. When the water retaining agent encounters water, it will be electrolyzed and dissociated into positively charged and negatively charged ions. The positively charged and negative...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00C08F251/00C08L51/00C08K3/34
Inventor 马强宇万太张璐周桦
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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