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Selenium-containing coating agent for sustained release fertilizer special for selenium-rich agricultural products and preparation method for selenium-containing coating agent

A technology for slow-release fertilizers and agricultural products, which is applied in the field of a special slow-release fertilizer coating agent for selenium-enriched agricultural products and its preparation field, can solve the problems of increasing the production cost of selenium-enriched agricultural products, high addition of inorganic selenium compounds, and low utilization rate, etc. Guaranteed degradability, improved fertilizer utilization rate, and high utilization rate

Active Publication Date: 2013-06-19
中亿农业发展(山东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of selenium fertilizer avoids the occurrence of human poisoning, after being applied to the soil, the selenate or selenite in it is easily fixed by the soil, and the utilization rate is low. In order to meet the needs of producing selenium-rich agricultural products, inorganic selenium The addition of chemical compounds is often very high, which greatly increases the production cost of selenium-enriched agricultural products

Method used

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  • Selenium-containing coating agent for sustained release fertilizer special for selenium-rich agricultural products and preparation method for selenium-containing coating agent

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A special slow-release fertilizer for selenium-enriched agricultural products containing selenium coating agent, made of the following components:

[0043] Cellulose 10g, polyvinyl alcohol 6g, acrylic resin 20g, epoxy resin (E44) 4g, N-methylolacrylamide 0.2g, Tween-800.1g, potassium persulfate 0.01g, sodium selenite 0.20g, Deionized water is 94g.

[0044] Preparation method, the steps are as follows:

[0045] (1) Weigh 10g of cellulose and 6g of polyvinyl alcohol, slowly disperse them into 70g of normal temperature water, soak for about 12 hours, and stir properly to make them fully swell and disperse, then gradually raise the temperature to 80°C, and Stir continuously at a stirring rate of 80r / min. After the polyvinyl alcohol and cellulose are completely dissolved, cool while stirring until normal temperature and stir evenly, and then pass through a 60-mesh sieve to obtain polyvinyl alcohol-cellulose co-soluble solution, stored for later use;

[0046] (2) 20g of ac...

Embodiment 2

[0053] Embodiment 2: A kind of preparation method of selenium-enriched agricultural product special slow-release fertilizer containing selenium coating agent

[0054] Weigh 10g of cellulose, 6g of polyvinyl alcohol, 21g of acrylic resin (9g of butyl acrylate and methyl methacrylate monomer, 3g of acrylic acid monomer), 6g of epoxy resin (E44), N-hydroxyl 0.4g of methacrylamide, 0.2g of polymethylsiloxane, 0.02g of potassium persulfate, 0.5g of sodium selenite, and 95g of deionized water;

[0055] First, slowly disperse polyvinyl alcohol and cellulose into 70g of normal temperature water, soak for about 12 hours, and stir properly to make it fully swell and disperse, then gradually raise the temperature to 80°C, and keep stirring, the stirring rate is 80r / min, after the polyvinyl alcohol and cellulose are completely dissolved, cool while stirring until room temperature, and stir evenly, then pass through a 60-mesh sieve, and store for later use; ester, methyl methacrylate, and...

Embodiment 3

[0056] Embodiment 3: a kind of preparation method of selenium-enriched agricultural product special slow-release fertilizer selenium-containing coating agent:

[0057] Weigh 12 g of carboxymethyl cellulose, 8 g of polyvinyl alcohol, 21 g of acrylic resin (wherein butyl acrylate and acrylic acid monomers are 18 g and 3 g respectively), 5 g of epoxy resin (E51), and 0.4 g of N-butoxyacrylamide g, OP-10 0.2g, ammonium persulfate 0.02g, potassium selenite 0.5g, and deionized water 125g; first, slowly disperse polyvinyl alcohol and cellulose into 100g of normal temperature water, soak for about 24h, and Stir properly to make it fully swell and disperse, then gradually increase the temperature to 80°C, and keep stirring at a stirring rate of 80r / min. After the polyvinyl alcohol and cellulose are completely dissolved, cool while stirring until room temperature, and Stir until uniform, pass through a 60-mesh sieve, and store for later use; dissolve the epoxy resin into the mixed monom...

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Abstract

The invention relates to a selenium-containing coating agent for a sustained release fertilizer special for selenium-rich agricultural products and a preparation method for the selenium-containing coating agent. The selenium-containing coating agent contains the following components: cellulose, polyvinyl alcohol, acrylic resin, epoxy resin, a crosslinking agent, an emulsifying agent, an initiator, selenite and deionized water. The invention also provides a method for preparing the selenium-containing coating agent. Selenium is dispersed in a coating agent, and the selenium is slowly released;and the prepared sustained release fertilizer can meet the requirements of the selenium-rich agricultural products in all growth periods through one-time application, solves that problems that a selenium-enriching agent is required to be sprayed on leaf surfaces for multiple times to cause high labor consumption and human poisoning is caused by improper spraying, and also overcomes a defect that the utilization rate of a selenium-enriching fertilizer through soil application is low. The sustained release fertilizer prepared from the coating agent has effects of improving fertilizer utilization rate, increasing crop yield and reducing environmental pollution.

Description

technical field [0001] The invention relates to a slow-release fertilizer coating agent and a preparation method thereof, in particular to a selenium-containing special slow-release fertilizer coating agent for selenium-rich agricultural products and a preparation method thereof. Background technique [0002] In 1973, the World Health Organization (WHO) announced that selenium is an essential trace element for humans. A large number of studies at home and abroad have confirmed that more than 40 kinds of diseases, including cancer, diabetes, cardiovascular and cerebrovascular diseases, Keshan disease, Kaschin-Beck disease, etc., are related to selenium deficiency in patients. According to incomplete statistics, there are 42 countries or regions lacking selenium in the world, and my country is also a selenium-deficient country - 2 / 3 of my country's areas are selenium-deficient areas, and 29% of the areas are severely selenium-deficient areas. In selenium-deficient areas, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00C05D9/02
Inventor 林海涛刘兆辉江丽华沈玉文石璟徐钰郑福丽高新昊谭德水王梅宋效宗
Owner 中亿农业发展(山东)有限公司
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