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Ecological water-retaining agent used for restoring saline lands, and preparation method thereof

A water-retaining agent, saline-alkali soil technology, applied in chemical instruments and methods, applications, organic fertilizers, etc., can solve the problems of low gel strength, poor salt tolerance, short service life, etc. The effect of low agent cost and production cost reduction

Active Publication Date: 2015-03-11
绍兴绿赫生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many types of water-retaining agents, mainly starch series and synthetic polymers. There are the following problems in the restoration of ecological vegetation in saline-alkali land: (1) The production cost is high, and the price of water-retaining agents remains high; ( 2) The water-retaining agent produced by starch graft copolymerization has poor salt and alkali resistance, low gel strength, and short service life. The synthetic polymer water-retaining agent has poor salt resistance and cannot be biodegraded, which is easy to cause soil compaction
The market lacks special water retaining agents suitable for the geographical environment of saline-alkali land

Method used

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  • Ecological water-retaining agent used for restoring saline lands, and preparation method thereof
  • Ecological water-retaining agent used for restoring saline lands, and preparation method thereof
  • Ecological water-retaining agent used for restoring saline lands, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Embodiment 1: A water-retaining agent for restoring the ecology of saline-alkali land, the water-retaining agent is composed of the following parts by weight:

[0041]

[0042]

[0043] The water-soluble catalyst is potassium persulfate or hydrogen peroxide or ammonium persulfate. The crosslinking agent is glycerol or epichlorohydrin or N,N-methylenebisacrylamide. The stabilizer is polyethylene glycol or polypropylene oxide or polyoxyethylene nonphenyl ether. The molecular formula of the technical grade acrylic acid is CH 2 =CHCOOH, the content of acrylic acid is greater than 99%. The molecular formula of industrial grade acrylamide is: CH 2 =CHCONH 2 , the content of acrylamide is greater than 98%. The neutralizing agent refers to the industrial ionic membrane method granular alkali with a content greater than 99%. The industrial-grade purified water has no calcium and magnesium ions.

[0044] The preparation steps of described modified corn bran are:

[...

Embodiment 2-10

[0049] Embodiment 2-10: the same as embodiment 1, the difference is that the water-retaining agent is composed of substances according to the parts by weight in the following table:

[0050]

Embodiment 11

[0051] Embodiment 11: the same as embodiment 1, the difference is:

[0052] The preparation steps of described modified corn bran are:

[0053] 1) Firstly, corn husks are steam-exploded using a continuous steam explosion machine, and the steam explosion conditions are as follows: the density of the corn husks is 140Kg / m3, the holding time is 60S, and the pressure is 0.8-0.9MPa.

[0054] 2) Add the corn bran after step 1) in the reaction kettle, add water and adjust to a slurry with a corn bran content of 15%, then slowly add 25% sodium hydroxide solution for alkalization, at this time, the corn bran and The mass ratio of sodium hydroxide is 1:0.6;

[0055] 3) Stir at 35-45°C for 20 minutes and then add chloroacetic acid for etherification. At this time, the mass ratio of corn bran to chloroacetic acid is 1:0.6;

[0056] 4) Raise the temperature to 60° C. while maintaining constant temperature and stirring for 60 minutes, wash with ethanol, dry and pulverize after washing to ...

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Abstract

The invention relates to the fields of ecological environment protection and chemical production, and relates to a water-retaining agent used in saline lands, and a preparation method thereof. The water-retaining agent is composed of substances of, by weight: modified corn bran, industrial-grade acrylic acid, industrial-grade acrylamide, a neutralizing agent, a water-soluble catalyst, industrial-grade purified water, a cross-linking agent, a stabilizing agent, ultrafine modified bentonite powder with a specification of 1200-1800 meshes, and sorbitol tristearin. The invention also discloses a preparation method of the water-retaining agent. The water-retaining agent provided by the invention is advantaged in high reaction efficiency, low cost, and good application effect in saline land ecological vegetation restoration.

Description

technical field [0001] The invention relates to the fields of ecological environment protection and chemical production, and relates to a water-retaining agent for saline-alkali land and a preparation method thereof. Background technique [0002] Salinized soil is one of the most common natural adversities encountered in the process of plant growth. Alkaline soiling severely limits the growth of plants, resulting in a decline in the yield of large areas of good land, which gradually become abandoned land; amount decreased. Due to the low content of organic matter in saline-alkali soil, poor physical and chemical properties, and low water storage and fertilizer retention capacity, adding water-retaining agents to ecological vegetation restoration in saline-alkali soil can complete water and moisture storage, promote the formation of soil aggregate structure, reduce water evaporation, and prevent secondary salinization. role. At present, there are many types of water-retaini...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/32C08F251/02C08B11/12C09K101/00
Inventor 郝军元禹军窦永位秦伟志
Owner 绍兴绿赫生物科技有限公司
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