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Temperature-controlled and slow-release fertilizer production process

A slow-release fertilizer and production process technology, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of inaccurate controlled release of fertilizer nutrients, environmental pollution, non-degradation, etc., and achieve significant environmental protection effects, reduce production costs, The effect of reducing white pollution

Inactive Publication Date: 2012-05-23
SHANDONG HUAKEN FERTILIZER IMPORT & EXPORT
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AI Technical Summary

Problems solved by technology

[0002] At present, most of the controlled-release fertilizer coating materials in my country cannot be degraded. The coating solvent uses chemical raw materials, which often cause environmental pollution after use, high cost, and inaccurate controlled release of fertilizer nutrients.

Method used

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Effect test

Embodiment Construction

[0005] (1) Preparation of coating solution

[0006] The solute and solvent used for the coating are uniformly mixed and stirred according to the ratio of 1:17±0.5, heated to 140-160°C and melted to make a coating liquid for temperature-controlled slow-release fertilizers, wherein the solute used for the coating is made of high-molecular polymer PE , PP, PS, and pore opener are mixed in a ratio of 2:7:2:1. The solvent is natural turpentine. The coating made of this coating liquid has good permeability and strong toughness. The coated fertilizer has a relatively high Strong fertilizer retention effect and fertilizer supply capacity, the coating solution has a wide range of raw materials, low cost, no environmental pollution during processing, simple coating technology, small investment in equipment, and easy implementation.

[0007] The unique feature of this temperature-controlled slow-release fertilizer is that natural turpentine is added to the coating liquid. The addition of...

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Abstract

The purpose of the invention is to provide a temperature-controlled and slow-release fertilizer production process. According to the process, a natural turpentine oil is added to the raw material so as to adjust polymer molecule structure, functional groups, adhesion, glass transition temperature, molecular weight, molecular distribution, cross-linked network size, hydrophilicity and hydrophobicity; the process comprises the following steps: (1) preparing a coating liquid; (2) spraying the coating liquid with temperature controlling; (3) treating waste gas; (4) packaging the finished product. With the production process of the present invention, the temperature-controlled and slow-release fertilizer can control the nutrient release along with the soil temperature curve and according to different requirements of the effective nutrients in composite fertilizer by different crops in different periods. With the present invention, the waste packaging bag can be recycled to adopt as the coating agent of the composite fertilizer, such that the white pollution is reduced, and the production cost is reduced. In addition, the used solvent adopts the natural raw material, such that no pollution is generated, and the effects of energy saving and environmental protection are significant.

Description

technical field [0001] The invention relates to a production process of a temperature-controlled slow-release fertilizer. Background technique [0002] At present, most of the coating materials of controlled-release fertilizers in my country cannot be degraded. The coating solvents are made of chemical raw materials, which often cause environmental pollution after use, high cost, and inaccurate controlled release of fertilizer nutrients. Contents of the invention [0003] The technical problem to be solved by the present invention is: choose low-cost, high-performance, degradable small molecular monomers as raw materials, add a kind of natural turpentine, adjust the molecular structure, functional group, adhesion, glass transition temperature, and molecular weight of the polymer and distribution, size of cross-linking network, and hydrophilicity and hydrophobicity, which can meet the needs of the product in production, transportation, and storage, and can also meet the req...

Claims

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Application Information

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IPC IPC(8): C05G3/00
Inventor 高建国李锦选韩斌
Owner SHANDONG HUAKEN FERTILIZER IMPORT & EXPORT
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