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Acrylic acid water retention layer of coated fertilizer and preparation method and device ofacrylic acid water retention layer

A technology for preparing device and acrylic acid, applied in fertilization devices, layered/coated fertilizers, fertilizer mixtures, etc., can solve the problems of recovery cost, large environmental dust, agglomeration and other problems, achieve good spreadability, reduce labor input , The effect of improving the adhesion rate

Active Publication Date: 2021-02-09
SAAS BIOTECH & NUCLEAR TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above method, there are problems in the method of "bonding the fine powder of the water-retaining agent to the surface of the granular fertilizer through an adhesive": the fine powder of the water-retaining agent is agglomerated and agglomerated during the bonding process; the bonding process causes a large amount of environmental dust
[0005] There are technical problems in the method of "directly synthesizing the water-retaining layer on the surface of the fertilizer through the method of reverse-phase suspension polymerization": the reverse-phase suspension polymerization dispersant, stabilizer, etc. have the problem of recycling costs, and at the same time, most of the organic solvents in the dispersion medium are relatively toxic. Large, if volatilized, it will affect the environment

Method used

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  • Acrylic acid water retention layer of coated fertilizer and preparation method and device ofacrylic acid water retention layer
  • Acrylic acid water retention layer of coated fertilizer and preparation method and device ofacrylic acid water retention layer
  • Acrylic acid water retention layer of coated fertilizer and preparation method and device ofacrylic acid water retention layer

Examples

Experimental program
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Effect test

Embodiment 1

[0061] It should be explained that the terms "length", "width", "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the purpose of It is for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation and therefore should not be construed as an illustration of the invention.

[0062] An acrylic water-retention layer of a coated fertilizer, the water-retention layer comprising 40 parts of acrylic acid, 10 parts of acrylamide, 10 parts of potassium hydroxide, 0.005 part of N,N'-methylenebisacrylamide, 0.005 part of potassium persulfate and deionized 50 parts of water; 500 parts of granular fertilizer.

[0063] as attached Figure 1-7 As shown, a preparation device for an acryli...

Embodiment 2

[0077] An acrylic water retention layer of a coated fertilizer, the water retention layer comprises 80 parts of acrylic acid, 80 parts of acrylamide, 43 parts of potassium hydroxide, 4 parts of N,N'-methylenebisacrylamide, 4 parts of potassium persulfate and deionized 160 parts of water; 600 parts of granular fertilizer.

[0078] The difference between the preparation method of this example and Example 1 is that the viscosity of the prepolymerization solution in this example is 80-200 (mPa.s); the temperature of adding acrylamide aqueous solution in this example is ≤10°C.

Embodiment 3

[0080] An acrylic water-retention layer of a coated fertilizer, the water-retention layer comprises 50 parts of acrylic acid, 50 parts of acrylamide, 20 parts of potassium hydroxide, 2 parts of N,N'-methylenebisacrylamide, 2 parts of potassium persulfate and deionized 100 parts of water; 800 parts of granular fertilizer.

[0081] The difference between the preparation method of this example and Example 1 is that in this example, the viscosity of the prepolymerized solution is 200-400 (mPa.s); in this example, the temperature of adding acrylamide aqueous solution is ≤5°C.

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Abstract

The invention relates to an acrylic acid water retention layer of a coated fertilizer. Theacrylic acid water retention layer comprises the following components in parts by weight: 40-80 parts of acrylic acid, 10-80 parts of acrylamide, 10-60 parts of potassium hydroxide, 0.005-4 part of N, N '-methylene bisacrylamide, 0.005-4 part of potassium persulfate and 50-160 parts of deionized water. The invention further relates to a preparation method of the water retention layer. The preparation method comprises the steps of pre-polymerization liquid preparation, coating liquid preparation and waterretention layer forming. The invention further relates to a water retention layer preparation device, raw materials are mixed through automatic mechanical transmission and then conveyed into the fluidized bed, and the thickness of the water retention layer is uniform; and dust, toxic gas, liquid and potential pollution to the environment are avoided in the coating process, and the coating liquid cannot be polymerized into gel before being sprayed to the surface of the granular fertilizer.

Description

technical field [0001] The invention belongs to the field of preparation of coated fertilizers, in particular to the preparation of acrylic water-retaining coated fertilizers, in particular to an acrylic water-retaining layer of coated fertilizers and a preparation method and device thereof. Background technique [0002] Drought and water shortage and low water and fertilizer utilization efficiency are important limiting factors affecting China's food security and sustainable agricultural development. At present, the effective utilization rate of agricultural irrigation water in China and the seasonal utilization rate of fertilizers in China are far lower than the average level of developed countries. In order to cope with the shortage of water resources and effectively reduce the excessive application of chemical fertilizers, in recent years, the amount of water-retaining agents and slow-release fertilizers with high water and fertilizer utilization rates has increased year ...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F220/56C08F222/38C05G5/30C05G3/70C05G5/12C05G3/40
CPCC08F220/06C08F220/56C05G5/37C05G3/70C05G5/12C05G3/40C08F222/385
Inventor 刘颖魏敏杨平华石治强
Owner SAAS BIOTECH & NUCLEAR TECH RES INST
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