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Soil water-retaining agent for saline-alkali soil and preparation method

A soil water-retaining agent and a technology for saline-alkali land, applied in the field of soil drought-resistant materials, can solve problems such as poor saline-alkali resistance and inapplicability, and achieve the effects of improving alkali resistance, water absorption capacity, and high liquid absorption rate.

Inactive Publication Date: 2019-12-24
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the defect that the soil water-retaining agent produced by starch graft copolymerization is poor in saline-alkaline resistance and not suitable for saline-alkali soil, the present invention proposes a soil water-retaining agent for saline-alkali land and its preparation method, thereby improving the quality of starch-grafted acrylic acid copolymerization. The alkali resistance and salt resistance of the water retaining agent produced ensure the good water absorption capacity and strength performance of the water retaining agent

Method used

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  • Soil water-retaining agent for saline-alkali soil and preparation method

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Embodiment 1

[0034] (1) First, the kaolin ore is crushed and ground, then purified to remove impurities, then mixed with N,N-dimethylacrylamide monomer solution, and then mechanically stirred for 23 hours at room temperature at a speed of 170 rpm, using N,N- Dimethacrylamide is directly intercalated with kaolin, and filtered to obtain N,N-dimethylacrylamide intercalated kaolin; in the preparation of N,N-dimethylacrylamide intercalated kaolin, N,N-dimethylacrylamide The mass ratio of acrylamide and kaolin is 100:12;

[0035] (2) First, mix acrylic acid and starch evenly, add water to control the temperature of the material to be 85 °C, and keep heat for 1.5 hours to gelatinize the starch to obtain a gelatinized product; the starch is corn starch; the mass ratio of acrylic acid, corn starch and water is 2:1:5;

[0036] (3) Transfer the gelatinized product into the reaction kettle, first introduce nitrogen gas, then add dextrin, straw powder, corn husk, diatomaceous earth, initiator and cros...

Embodiment 2

[0042] (1) First, the kaolin ore is crushed and ground, then purified to remove impurities, then mixed with N,N-dimethylacrylamide monomer solution, and then mechanically stirred for 25h at a speed of 150rpm under normal temperature conditions, using N,N- Dimethacrylamide is directly intercalated with kaolin, and filtered to obtain N,N-dimethylacrylamide intercalated kaolin; in the preparation of N,N-dimethylacrylamide intercalated kaolin, N,N-dimethylacrylamide The mass ratio of acrylamide and kaolin is 100:5;

[0043] (2) First, mix acrylic acid and starch evenly, add water to control the temperature of the material to be 85 °C, and keep heat for 1.5 hours to gelatinize the starch to obtain a gelatinized product; the starch is corn starch; the mass ratio of acrylic acid, corn starch and water is 2:1:5;

[0044] (3) Transfer the gelatinized product into the reaction kettle, first introduce nitrogen gas, then add dextrin, straw powder, corn husk, diatomaceous earth, initiator...

Embodiment 3

[0049] (1) First, the kaolin ore is crushed and ground, then purified to remove impurities, then mixed with N,N-dimethylacrylamide monomer solution, and then mechanically stirred at a speed of 200rpm for 20h under normal temperature conditions, using N,N- Dimethacrylamide is directly intercalated with kaolin, and filtered to obtain N,N-dimethylacrylamide intercalated kaolin; in the preparation of N,N-dimethylacrylamide intercalated kaolin, N,N-dimethylacrylamide The mass ratio of acrylamide and kaolin is 100:20;

[0050] (2) First, mix acrylic acid and starch evenly, add water to control the temperature of the material to be 85 °C, and keep heat for 1.5 hours to gelatinize the starch to obtain a gelatinized product; the starch is corn starch; the mass ratio of acrylic acid, corn starch and water is 2:1:5;

[0051] (3) Transfer the gelatinized product into the reaction kettle, first introduce nitrogen gas, then add dextrin, straw powder, corn husk, diatomaceous earth, initiato...

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Abstract

The invention provides a soil water-retaining agent for saline-alkali soil and a preparation method. The soil water-retaining agent is prepared by the following steps: performing intercalation treatment on kaolin by using N,N-dimethylacrylamide, adding acrylic acid and starch for gelatinization, moving the mixture into a reaction kettle, adding dextrin, straw powder, corn bran, diatomite, an initiator and a cross-linking agent in a nitrogen atmosphere, performing a mixing reaction, and crushing a reaction product to obtain the soil water-retaining agent. In the process of producing the soil water-retaining agent by graft polymerization of the starch into the composite water-absorbing resin provided by the invention, by adding the N,N-dimethylacrylamide intercalated kaolin, the alkali resistance of the water-retaining agent and the water absorption capacity of the water-retaining agent to saline water are remarkably improved, so that the water-retaining agent has good salt and alkali resistance, and the application range of the soil water-retaining agent is effectively widened.

Description

technical field [0001] The invention relates to the technical field of soil drought-resistant materials, in particular to a soil water-retaining agent for saline-alkali land and a preparation method thereof. Background technique [0002] Developing water-dissolving agriculture and improving water use efficiency are one of the effective measures to ensure the development of agriculture in arid areas. Water-retaining agent is a chemical water-saving and high-tech drought-resistant product that has developed rapidly in recent years. It has been gradually applied to the production of flowers, seedlings and crops. The water retaining agent has the characteristics of fast absorption and slow release of water, which can reduce the surface water of the cultivation substrate and the evaporation of substrate water. That is to say, during the watering process, the water-retaining agent can store the gravitational water that cannot be continuously used by the plants, effectively increa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C08F251/00C08F220/06C09K101/00
CPCC08F251/00C09K17/40C09K2101/00C08F220/06
Inventor 陈庆昝航
Owner CHENDU NEW KELI CHEM SCI CO LTD
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