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Process for preparation of ammonium salt hydrogel

A salt water and gel technology, applied in ammonium salt fertilizer, ammonium nitrate fertilizer, nitrogen fertilizer and other directions, can solve problems such as unfavorable application, and achieve the effects of eliminating pollution, being easy to obtain, and easy to control.

Inactive Publication Date: 2006-09-27
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rubbery gel has high strength, and the gel network has the characteristics of overall penetration, which is not conducive to application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of ammonium hydrogel of the present invention may further comprise the steps:

[0029] (1) prepare the ammonium nitrate aqueous solution of concentration 50% with ammonium nitrate;

[0030] (2) Acrylic acid is neutralized with sodium hydroxide, and the degree of neutralization of carboxyl groups is 10%;

[0031] (3) Mix acrylamide and acrylic acid that has neutralized the carboxyl group with α-glycidyl methacrylate and methylenebisacrylamide in a ratio of 1.5:3:0.1:0.3, and add it to ammonium while stirring. In the saline solution, the total weight percentage of acrylamide, acrylic acid that has neutralized the carboxyl group, α-glycidyl methacrylate, and methylenebisacrylamide is 1%, and the temperature of the solution is controlled at 90°C;

[0032] (4) Add the ammonium persulfate solution of 10% by weight into the solution prepared in step (3) under stirring. 0.1% of the total mass of glycidyl acrylate and methylenebisacrylamide, and polymeri...

Embodiment 2

[0035] The preparation method of ammonium hydrogel of the present invention may further comprise the steps:

[0036] (1) prepare the saturated ammonium chloride aqueous solution that concentration is 30% with ammonium chloride;

[0037] (2) neutralize the carboxyl groups of acrylic acid and α-methacrylic acid with ammonium hydroxide, and the degree of neutralization of the carboxyl groups is 100%;

[0038] (3) The amount of acrylic acid, α-methacrylic acid and hydroxypropyl acrylate, glycidyl acrylate, and α-glycidyl methacrylate that has neutralized the carboxyl group in the amount of 3:4:1.5:1:1 Proportional mixing, adding to the ammonium salt aqueous solution while stirring, so that the total weight percentage of acrylic acid, α-methacrylic acid and hydroxypropyl acrylate, glycidyl acrylate, and α-glycidyl methacrylate that have neutralized the carboxyl group The content is 20%, and the temperature of the solution is controlled at 10°C;

[0039] (4) Potassium persulfate a...

Embodiment 3

[0042] The preparation method of ammonium hydrogel of the present invention may further comprise the steps:

[0043] (1) prepare the mixed ammonium phosphate aqueous solution of concentration 25% with ammonium bicarbonate, ammonium dihydrogen phosphate;

[0044] (2) neutralize the carboxyl groups of acrylic acid and α-methacrylic acid with sodium hydroxide, and the degree of neutralization of the carboxyl groups is 50%;

[0045](3) The amount of acrylic acid, α-methacrylic acid and acrylamide, α-hydroxypropyl methacrylate and ethylene bisacrylamide that have neutralized the carboxyl group is 5:1:0.5:2:0.8 Proportional mixing, adding to ammonium salt aqueous solution while stirring, so that the total weight percentage of acrylic acid, α-methacrylic acid, α-hydroxypropyl methacrylate, acrylamide and ethylene bisacrylamide is 10%, And control the solution temperature to 50°C;

[0046] (4) Ammonium cerium sulfate and sodium bisulfite solution of 20% by weight are added in the so...

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PUM

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Abstract

The invention discloses an ammonium salt preparing method, which comprises the following steps: A, preparing ammonium salt aqueous solution with ammonium salt; B, adding 1-20%function integral and crossbridging integral in ammonium salt aqueous solution at the temperature between 10deg.c and 90deg.c; C, putting 5-30% initiating agent liquor in liquor of step (the admission amount is 0.1-1% function integral and crossbridging integral); getting the ammonium salt by polymerization reaction for one hour to five hours. The invention is characterized by the following: the raw material is easy to get; the manufacturing technique is simple; it's easy to operate; the prepared ammonium salt aquagel is stored in network architecture of function macromolecule with ammoniacal nitrogen fertilizer and water; It's widely used for horticulture cultivation and desert handing.

Description

technical field [0001] The invention relates to a method for preparing chemical fertilizers, in particular to a method for preparing ammonium hydrogel with the function of water retention and fertilizer storage. Background technique [0002] In order to improve the utilization rate of soluble chemical fertilizers and reduce the pollution of the atmosphere, soil, groundwater, rivers and lakes due to the use of chemical fertilizers, the controlled release technology of fertilizers has been actively researched and developed in recent decades. Applying chemical fertilizer coating technology to form coated controlled-release fertilizers is the most researched technology. It is expected to achieve the goal of realizing chemical fertilizers by selecting coating materials and controlling the thickness, porosity, degradation speed and particle size of the coating film. The purpose of the release rate is comparable to the absorption rate of the plant. So far, due to cost and price co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/08C05C1/00C05C3/00C05G3/90
Inventor 王正辉王红飞朱伯明廖宗文
Owner SOUTH CHINA AGRI UNIV
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