Preparation of agricultural water-retaining agent

Abstract

The invention provides preparation of an agricultural water-retaining agent, which is prepared by the following raw materials by weight: 10-20 parts of acrylic acid, 5-10 parts of corn starch, 4-8 parts of acrylamide, 0.1-0.4 parts of N-hydroxymethyl acrylamide, 0.1-0.4 parts of ammonium persulfate, 0.2-0.6 parts of potassium persulfate, 15-25 parts of water and 45-55 parts of 30% caustic soda. The preparation comprises the steps of adding acrylic acid, corn starch, acrylamide, N-hydroxymethyl acrylamide, ammonium persulfate, potassium persulfate and water into a reaction kettle orderly, agitating adequately and mixing uniformly; adding 1 / 3 amount of 30% caustic soda into the reaction kettle, controlling the temperature at 43-47 DEG C, agitating for 4-6min at 60r / min; adding 1 / 3 amount of caustic soda when the temperature is reduced to 40 DEG C, controlling the temperature within 50 DEG C, and agitating for reaction for 2-3 hours at 60r / min; taking out materials and placing the materials in an open mouth container; adding the balance of caustic soda slowly into the reaction kettle while agitating; stopping agitation immediately when the materials become thick and slightly red; extracting the agitated materials out of the container to foam and crosslink; cooling and cutting to strips after crosslinking; then drying through a 100 DEG C oven and smashing to 10 meshes to obtain the finished product.

Description

technical field [0001] The invention relates to an agricultural water-retaining agent. The agent has strong water-retaining ability and biodegradation ability, is a green and environment-friendly product, and is very suitable for arid and water-deficient areas. Background technique [0002] As a chemical water-saving product, water-retaining agent was successfully developed in the Northern Research Center of the United States Department of Agriculture in the 1970s. Subsequently, the United States, Japan, France and other countries conducted a lot of research on the application of water-retaining agents in agriculture and forestry, and carried out It has been popularized and used in a large area; domestic research on water-retaining agents began in the mid-1980s, and during the "Eighth Five-Year Plan" and "Ninth Five-Year Plan" periods, the national demonstration and promotion reached more than 11 million mu. At present, soil curing agents, composite geotechnical A large numbe...

AI Technical Summary

Problems solved by technology

[0004] However, the synthesis process of conventional water-retaining agents is complicated, and the raw materials are toxic and harmful chemicals.

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