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Preparation method of modified attapulgite water-retaining agent for saline-alkali soil

A technology of modifying attapulgite and attapulgite, which is applied in the direction of chemical instruments and methods, applications, soil conditioning materials, etc., can solve the problems of high water retaining agent price, low gel strength, poor salt and alkali resistance, etc. Achieve the effects of reducing nutrient loss, good water retention, and improving utilization

Active Publication Date: 2021-06-18
CHINA NAT RICE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing water-retaining agents used in saline-alkali ecological vegetation restoration have the following problems: (1) the production cost is high, and the price of water-retaining agents remains high; (2) poor salt and alkali resistance, low gel strength, and short service life
This new, efficient, safe, green, and environmentally friendly new generation of water-retaining agent has rarely been reported at home and abroad.

Method used

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  • Preparation method of modified attapulgite water-retaining agent for saline-alkali soil
  • Preparation method of modified attapulgite water-retaining agent for saline-alkali soil
  • Preparation method of modified attapulgite water-retaining agent for saline-alkali soil

Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method of a modified attapulgite water-retaining agent for saline-alkali land, the steps of which are:

[0025] 1) The attapulgite raw material is crushed and ground by a ball mill to a particle size of 120-150 μm, and the length or diameter of the attapulgite after pulverization does not exceed 150 μm;

[0026] 2) Pyrolyze the attapulgite powder obtained in step 1) at a temperature of 55°C under the protection of nitrogen, soak the pyrolysis product in saturated KOH liquid, dry it, and then use it under the protection of nitrogen to Soak the carbonized product in saturated KOH solution and activate it at 780°C to obtain alkali-catalyzed modified attapulgite powder;

[0027] 3) the alkali-catalyzed modified attapulgite powder obtained in step 2) was stirred at 1100r / min for 1h, and the alkali-catalyzed modified attapulgite powder was mixed with 450 parts by weight of magnetic nano-Fe 3 o 4 6 parts by weight, 35 parts by weight of glutamic acid were mixe...

Embodiment 2

[0031] A preparation method of a modified attapulgite water-retaining agent for saline-alkali land, the steps of which are:

[0032] 1) The attapulgite raw material is crushed and ground by a ball mill to a particle size of 100-150 μm, and the length or diameter of the attapulgite after pulverization does not exceed 150 μm;

[0033] 2) Pyrolyze the attapulgite powder obtained in step 1) at a temperature of 65°C under the protection of nitrogen, soak the pyrolysis product in saturated KOH liquid, dry it, and then use it under the protection of nitrogen to Soak the carbonized product in saturated KOH solution and activate it at 820°C to obtain alkali-catalyzed modified attapulgite powder;

[0034] 3) the alkali-catalyzed modified attapulgite powder obtained in step 2) was stirred at 1600r / min for 3h, and the alkali-catalyzed modified attapulgite powder was mixed with 550 parts by weight of magnetic nano-Fe 3 o 41 part by weight, mixed with 35 parts by weight of glutamic acid, ...

Embodiment 3

[0038] A preparation method of a modified attapulgite water-retaining agent for saline-alkali land, the steps of which are:

[0039] 1) The attapulgite raw material is crushed and ground by a ball mill to a particle size of 100-150 μm, and the length or diameter of the attapulgite after pulverization does not exceed 150 μm;

[0040] 2) Pyrolyze the attapulgite powder obtained in step 1) at a temperature of 60°C under the protection of nitrogen, soak the pyrolysis product in saturated KOH liquid, dry it, and then use it under the protection of nitrogen to Soak the carbonized product in saturated KOH solution and activate it at 800°C to obtain alkali-catalyzed modified attapulgite powder;

[0041] 3) the alkali-catalyzed modified attapulgite powder obtained in step 2) was stirred at 1500r / min for 2h, and the alkali-catalyzed modified attapulgite powder was mixed with 500 parts by weight of magnetic nano-Fe 3 o 4 5 parts by weight, 30 parts by weight of glutamic acid were mixe...

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Abstract

The invention belongs to the technical field of soil water-retaining agents, and particularly relates to a preparation method of a modified attapulgite water-retaining agent for saline-alkali soil. The preparation method comprises the following steps: crushing and grinding an attapulgite raw material through a ball mill to obtain attapulgite powder, carrying out alkali catalysis modification on the attapulgite powder under the protection of nitrogen, magnetizing the obtained alkali catalysis modified attapulgite powder to obtain magnetic attapulgite powder, and then adding an initiator and a cross-linking agent to obtain the soil water-retaining agent for saline-alkali soil. The modified attapulgite water-retaining agent can improve the properties of crop soil, such as soil hardening, also can improve the physicochemical properties of the soil, can well improve the utilization rate of moisture and fertilizer in agricultural production, reduces the nutrient loss, and increases the economic benefits of agricultural production.

Description

technical field [0001] The invention belongs to the technical field of soil water-retaining agents, and in particular relates to a preparation method of a modified attapulgite water-retaining agent for saline-alkali land. 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, high-tech drought-resistant product that has developed rapidly in recent years. 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. The water retaining agent can store gravity water that cannot be continuously used by plants, effectively increase the water holding capacity of the substrate, and improve the water use efficiency. Salinized soil is one of the most common n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40
CPCC09K17/40
Inventor 张均华金千瑜赵夫涛朱春权曹小闯朱练峰孔亚丽黄晶
Owner CHINA NAT RICE RES INST
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