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Soil water-retaining agent and preparation method thereof

A soil water-retaining agent and water-retaining agent technology, applied in soil conditioning materials, chemical instruments and methods, and other chemical processes, etc., can solve problems such as poor soil resistance, collapse, water-retaining agent moisture and soil fertility that cannot provide crops well , to achieve the effect of improving the balance ability, improving porosity, ensuring fertility and organic matter content

Inactive Publication Date: 2020-02-11
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing water-retaining improvers often ignore their ability to maintain soil fertility and release water when pursuing extremely high water absorption multiples, resulting in the water and soil fertility in the water-retaining agent not being able to provide crops well; in order to achieve multiple uses of one fertilizer, It is compounded with various fertilizers, but various elements tend to inhibit each other; the soil structure with the addition of amendments tends to be loose, which makes the soil less resistant to external effects, such as collapse under pressure, etc.

Method used

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  • Soil water-retaining agent and preparation method thereof

Examples

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preparation example Construction

[0030] In a preferred embodiment, the preparation method of the modified clay comprises the following steps:

[0031] (1) Put clay, 1-carboxybenzocyclobutene, water and catalyst in an ice bath and mix uniformly to obtain mixture A;

[0032] (2) Put the mixture A in an oven at -0.06~-0.12MPa and dry at 75~95°C for 5~13 hours to obtain the reactant B;

[0033] (3) After the reactant B is cooled, it is crushed and screened to obtain particles with a particle size of 0.5-2.5 μm, which is the modified clay.

[0034] In a preferred embodiment, the weight ratio of 1-carboxybenzocyclobutene to clay in the step (1) is (0.6-1.2):1.

[0035] In a preferred embodiment, the catalyst in the step (1) is tetrabutylammonium bromide, preferably, the mol ratio of tetrabutylammonium bromide to 1-carboxybenzocyclobutene is (0.004˜0.008): 1; more preferably, the molar ratio of tetrabutylammonium bromide to 1-carboxybenzocyclobutene is 0.006:1.

[0036] In a preferred embodiment, the present inve...

Embodiment 1

[0047] Embodiment 1 provides a kind of soil water-retaining agent, and its preparation raw material comprises by weight: 45 parts of polyacrylamide, 15 parts of potassium polyacrylate, 18.4 parts of inorganic fertilizer, 5 parts of sodium alginate, 7.5 parts of clay, 7.5 parts of peat share.

[0048] The polyacrylamide is an anionic polyacrylamide with a weight average molecular weight of 15 million.

[0049] The inorganic fertilizer is a mixture of calcium fertilizer, magnesium fertilizer, iron fertilizer, and manganese fertilizer; the weight ratio of the calcium fertilizer, magnesium fertilizer, iron fertilizer, and manganese fertilizer is 20:40:14:1; the calcium fertilizer is nitric acid The calcium and magnesium fertilizer is magnesium sulfate, the iron fertilizer is ferrous sulfate, and the manganese fertilizer is manganese chloride.

[0050] The particle size of the clay is 1 μm.

[0051] The present embodiment also provides the preparation method of above-mentioned so...

Embodiment 2

[0056] Example 2 provides a soil water retaining agent, which differs from Example 1 in that the clay contains modified clay, and the weight ratio of modified clay to unmodified clay is 0.6:1.

[0057] The preparation raw material of described modified clay comprises 1-carboxybenzocyclobutene and clay, and its preparation method comprises the following steps:

[0058] (1) Put clay, 1-carboxybenzocyclobutene, water and catalyst in an ice bath and mix uniformly to obtain mixture A;

[0059] (2) Place the mixture A at -0.08MPa and dry it in an oven at 85°C for 8 hours to obtain the reactant A;

[0060] (3) After reactant A is cooled, it is crushed and screened to obtain particles with a particle size of 1 μm, which is the modified clay.

[0061] In the step (1), the weight ratio of 1-carboxybenzocyclobutene and clay is 0.8:1, and the catalyst is tetrabutylammonium bromide, and the mixture of tetrabutylammonium bromide and 1-carboxybenzocyclobutene The molar ratio is 0.006:1, an...

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Abstract

The invention provides a soil water-retaining agent and a preparation method thereof. The soil water-retaining agent comprises an organic water-retaining agent, sodium alginate, clay and turf, and theorganic water-retaining agent comprises polyacrylamide and one or two or more of potassium polyacrylate, sodium polyacrylate, ammonium polyacrylate, a starch-acrylic acid graft copolymer and a cellulose-acrylic acid graft copolymer. The soil water-retaining agent has the advantages of reasonable water absorption and drainage rates, good water retention effect, flexibleness in adjustment of the soil humidity under a wet or drought condition, loosening of soil, preservation of heat of the soil, reduction of mutual inhibition among elements, improvement of the utilization rate of fertilizers andthe content of organic matters in the soil, and improvement of the resistance of the soil to external pressure.

Description

technical field [0001] The invention belongs to the technical field of water-retaining agents, and in particular relates to a soil water-retaining agent and a preparation method thereof. Background technique [0002] In recent years, relevant experts and scholars have carried out some research and attempts on enhancing the soil's ability to retain fertilizer and water, and have achieved certain results. The main component of the water-retaining agent is a functional polymer material with strong water-absorbing capacity. Because it contains a large number of hydrophilic groups, it has a large water-absorbing capacity and a fast rate. The hydrogel formed after absorbing water can slowly release water, effectively In addition, the water-retaining agent expands and contracts during the process of absorbing and releasing water, making the soil loose and air-permeable without agglomeration, so the roots of crops can absorb more oxygen and nutrients; in addition, adding peat for wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C05G3/80C09K101/00C09K107/00
CPCC05C5/04C09K17/40C09K2101/00C09K2107/00
Inventor 黄华宇刘鑫李杨子
Owner NORTHWEST UNIV(CN)
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