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Preparation method and application of straw sodium water retention and conditioning material

A technology of straw sodium and straw, which is applied in the field of straw modification and utilization of agricultural solid waste resources, can solve the problems of poor utilization of straw resources, environmental pollution, waste of resources, etc., and achieve good market application prospects and biocompatibility Good performance, increase water retention effect

Active Publication Date: 2021-01-05
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for a long time, straw resources have not been well utilized. Except for some straws used as feed and fertilizer, most of them are disposed of by burning and discarding, which not only causes waste of resources, but also pollutes the environment.

Method used

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  • Preparation method and application of straw sodium water retention and conditioning material
  • Preparation method and application of straw sodium water retention and conditioning material
  • Preparation method and application of straw sodium water retention and conditioning material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: the preparation method of carboxymethyl straw sodium (abbreviation straw sodium)

[0031] Straw raw materials: wheat straw, corn straw, soybean straw, cotton straw or other straw-like raw materials, one of which can be used or several raw materials can be mixed.

[0032] Straw raw material pretreatment: remove impurities, dry, crush the straw, and then sieve, and take the straw powder with a particle size of ≥40 mesh for later use.

[0033] Slowly add 1000g of wheat straw powder into a 10L kneader, according to the ratio of straw powder raw material to alkalizing agent is 1:1.90, add alkalizing agent aqueous solution and mix, the concentration of alkali is 19.5% (its density test value is about 268g / l), under normal temperature, under the condition of continuous kneading and stirring by the kneader, add the straw and the alkalizing agent in 25 minutes, and then perform solvent-free alkalization for 1.5 hours; then enter the etherifying agent into the alka...

Embodiment 2

[0034] Embodiment 2: preparation method of carboxymethyl straw sodium

[0035] Straw raw materials: wheat straw, corn straw, soybean straw, cotton straw or other straw materials, one or several of them can be used in combination.

[0036] Straw raw material pretreatment: remove impurities, dry, crush the straw, and then sieve, and take the straw powder with a particle size of ≥40 mesh for later use. Slowly add 1001g of wheat straw powder into a 10L kneader, according to the ratio of straw powder raw material to alkalizing agent is 1:1.95, add alkalizing agent aqueous solution and mix, the concentration of alkali is 20% (the density test value is about 269g / l), under the condition of continuous kneading and stirring by the kneader, add the straw and the alkalizing agent in 25 minutes, and then perform solvent-free alkalization for 1.5 hours; then enter the etherifying agent into the alkalized straw (the preparation method of the etherifying agent is chloroacetic acid Mix even...

Embodiment 3

[0037] Embodiment 3: preparation method of carboxymethyl straw sodium

[0038] Straw raw materials: wheat straw, corn straw, soybean straw, cotton straw or other straw materials, one or several of them can be used in combination.

[0039] Straw raw material pretreatment: remove impurities, dry, crush the straw, and then sieve, and take the straw powder with a particle size ≥ 40 mesh for use. Slowly add 997g of wheat straw powder into a 10L kneader. According to the ratio of straw powder raw material to alkalizing agent is 1:1.90, add alkalizing agent aqueous solution and mix. The concentration of alkali is 19.7% (the density test value is about 269g / l ), under the condition of continuous kneading and stirring in the kneader, the straw and alkalizing agent were added in 20 minutes, and then carried out solvent-free alkalization for 2.0 hours; The ratio of soda ash is mixed evenly in the range of 1:0.563, and the pH value is about 3.6) for etherification. The ratio of straw raw...

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Abstract

The invention discloses a preparation method and application of straw sodium water retention and conditioning material. The preparation method mainly includes: (1) crushing of straw raw materials; (2) alkalization; (3) etherification; (4) drying and crushing of products. The method has simple process, wide sources of preparation raw materials, and can directly use straw as raw material in the preparation process, with high yield and low cost; the prepared straw sodium material is biodegradable, has good biocompatibility, can increase soil water retention, and is resistant to microorganisms and Plant growth has a growth-promoting effect, which can realize the utilization of straws from waste to wealth and high added value.

Description

technical field [0001] The invention relates to a preparation method and application technology of straw sodium, and belongs to the field of straw modification and utilization of agricultural solid waste resources. Background technique [0002] my country is a large agricultural country with abundant straw resources, and the annual output of straw is more than 700 million tons. Straw is mainly composed of chemical components such as cellulose, hemicellulose, lignin, crude protein, and small molecular carbohydrates. It is a renewable resource with low price and abundant sources. But for a long time, straw resources have not been well utilized. Except for some straws used as feed and fertilizer, most of them are disposed of by burning and discarding, which not only causes waste of resources, but also pollutes the environment. Therefore, it is of great practical significance to carry out comprehensive utilization of straw. At the same time, my country is still a country with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/32C05G3/80A01B79/02C09K103/00C09K101/00
CPCC09K17/32C05F11/00A01B79/02C09K2103/00C09K2101/00C05G3/80
Inventor 李艳菊吴月邵自强刘燕华陈静李友琦王行惠袁晶晶王飞俊
Owner BEIJING INSTITUTE OF TECHNOLOGYGY