Composite moisture holding agent of humic acid and preparation method

A technology of humic acid and water-retaining agent, which is applied in the direction of chemical instruments and methods, fertilizer mixtures, organic fertilizers, etc., can solve the problems of single function, high production cost of water-retaining agent, and unobvious effect of increasing production, and achieve simple preparation process and large area Promote the effect of promotion and low cost

Inactive Publication Date: 2005-10-26
师进
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a low-cost, multi-functional composite humic acid water-retaining agent and its preparation method in order to overcome the defects of the existing water-retaining agent, such as high production cost, single function, and ineffective application in agricultural production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] ①Put acrylic acid in the mixer, adjust to PH value = 5 with 40% potassium hydroxide deionized aqueous solution under stirring, and cool to room temperature; then add potato starch of the same amount as acrylic acid and 0.0001 times of acrylic acid to a concentration of 0.5 % Potassium persulfate aqueous solution, stir and heat up to 40°C for graft polymerization, stop stirring when the mixture becomes translucent, continue to heat up to 50°C for polymerization until the mixture becomes a transparent polymer gel .

[0017] ② Dissolve potassium dodecyl phosphate in 10 times the amount of water, then add sodium humate 3 times the amount of potassium dodecyl phosphate, heat to 75°C for 30 minutes for esterification reaction, and prepare a product with Reactive black glue, modified humate.

[0018] ③Mix the reactive copolymer gel produced in step ①, the modified humate, formaldehyde, and LD-123 dispersant prepared in step ② in a ratio of 1:0.1:0.01:0.001, and heat to 100°C ...

Embodiment 2

[0020] ①Put acrylic acid in the mixer, adjust the pH value to 5.5 with 45% potassium hydroxide deionized aqueous solution under stirring, cool to room temperature; 0.6% potassium persulfate aqueous solution, stir and heat up to 40°C to allow graft polymerization, stop stirring when the mixture becomes translucent, continue to heat up to 60°C for polymerization until the mixture becomes transparent polymer gel glue.

[0021] ② Dissolve potassium dodecyl phosphate in 12 times the amount of water, then add sodium humate with 5 times the amount of potassium dodecyl phosphate, heat to 80°C for 30 minutes for esterification reaction, and prepare a product with Reactive black glue, modified humate.

[0022] ③Mix the reactive copolymer gel produced in step ①, the modified humate, formaldehyde, and LD-123 dispersant prepared in step ② in a ratio of 1:0.3:0.02:0.002, and heat to 105°C for reaction 1.5 hours, cooling, drying, crushing and sieving to get the finished product.

Embodiment 3

[0023] Embodiment three, a kind of compound humic acid water retaining agent preparation method comprises three steps:

[0024] ①Put acrylic acid in the mixer, adjust the pH value to 6 with 50% potassium hydroxide deionized aqueous solution under stirring, cool to room temperature; 0.7% potassium persulfate aqueous solution, stir and heat up to 50°C to allow graft polymerization, stop stirring when the mixture becomes translucent, continue to heat up to 70°C for polymerization until the mixture becomes transparent polymer gel glue.

[0025] ② Dissolve potassium dodecyl phosphate in 13 times the amount of water, then add sodium humate 10 times the amount of potassium dodecyl phosphate, heat to 85 ° C for 35 minutes for esterification reaction, and prepare a product with Reactive black glue, modified humate.

[0026] ③Mix the reactive copolymer gel produced in step ①, the modified humate, formaldehyde, and LD-123 dispersant prepared in step ② in a ratio of 1:0.5:0.03:0.003, an...

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PUM

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Abstract

The present invention provides a method for preparing compounded type humic acid water-retaining agent. Said method includes the following steps: adopting acrylic acid, starch and potassium hydroxide as main agent, compounding humic acid protective function group, controlling by items, respectively modifying and improving humate and potassium polyacrylate water-absorbing resin to make both them have reaction activity, then uniformly mixing them, and under the condition of heating and melting them making them implement compounding reaction so as to obtain the invented water-retaining agent with the function of promoting plant rooting, germination and growth.

Description

technical field [0001] The invention belongs to the field of agriculture and forestry water and soil conservation, and relates to a water-retaining agent and its preparation method, in particular to a method for preparing a compound humic acid water-retaining agent and the compound humic acid water-retaining agent prepared by the method, which is mainly used in agriculture and forestry Drought resistance and water saving, desert greening, water and soil conservation, planting trees and grass. Background technique [0002] Water-retaining agents have been reported in many patent documents and have been widely used in agriculture. However, due to their single function and insignificant yield-increasing effect, their large-scale promotion has been limited. Chinese patent 97104129.6 discloses a preparation method of polyacrylate superabsorbent resin. The product has a single function, high production cost, and only has the function of water absorption and water retention, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H99/00
Inventor 师进黄高宝
Owner 师进
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