Water-soluble ammonium phosphate fertilizer wrapping agent and preparation method thereof

A water-soluble, wrapping agent technology, applied in the direction of ammonium orthophosphate fertilizer, alkaline orthophosphate fertilizer, phosphate fertilizer, etc., can solve environmental pollution and other problems, achieve good effect, good anti-caking, and cheap price

Inactive Publication Date: 2022-03-08
HUBEI FORBON NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the object of the present invention provides a water-soluble ammonium phosphate coating agent and a preparation method thereof to solve the pollution of the traditional ammonium phosphate coating agent to the environment

Method used

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  • Water-soluble ammonium phosphate fertilizer wrapping agent and preparation method thereof

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preparation example Construction

[0019] A water-soluble ammonium phosphate fertilizer coating agent and a preparation method thereof. The coating agent includes the following components in parts by weight: 10-20 parts of plasticized modified polyvinyl alcohol, 10-30 parts of cross-linked starch and 50-80 parts of water; The plasticized modified polyvinyl alcohol is obtained by heat fusion of plasticizer and polyvinyl alcohol, and the cross-linked starch is obtained by cross-linking reaction of cross-linking agent and starch under the action of a catalyst.

[0020] The plasticized modified polyvinyl alcohol and cross-linked starch in the technical solution are used as the main components of the wrapping agent to form a coating layer on the surface of the fertilizer. Polyvinyl alcohol (PVA) is a degradable, water-soluble and film-forming polyhydroxy polymer. However, since the melting point temperature (200-250°C) of PVA is very close to the decomposition temperature, melt blending is currently used to plastici...

Embodiment 1

[0023] This embodiment provides a water-soluble ammonium phosphate fertilizer coating agent, which includes the following components in parts by weight: 10% plasticized modified polyvinyl alcohol, 10% cross-linked starch and 80% water. The preparation method is as follows: add 70g of polyvinyl alcohol and 30g of glycerin-ethylene glycol (wherein the weight ratio of glycerol to ethylene glycol is 4:1) compound plasticizer to a high mixer, mix at a temperature of 80°C for 1 hour, After cooling and crushing, powdery plasticized modified polyvinyl alcohol is obtained; potato starch and water are prepared into 36% starch milk in a reaction kettle, and 0.1% phosphorus oxychloride is added to account for the mass of dry potato starch, and 0.1mol / L Adjust the pH of the sodium hydroxide solution to 10.5, react at 45°C for 1.5h, centrifuge, filter, wash with water, dry, pulverize, and sieve to obtain powdery cross-linked starch; weigh 10g of plasticized modified polysaccharide Dissolve ...

Embodiment 2

[0026] This embodiment provides a water-soluble ammonium phosphate fertilizer coating agent, which includes the following components in parts by weight: 10% plasticized modified polyvinyl alcohol, 30% cross-linked starch and 60% water. The preparation method is as follows: add 70g of polyvinyl alcohol and 30g of urea-triethanolamine (where the weight ratio of urea to triethanolamine is 1:1) compound plasticizer into a high mixer, mix at 80°C for 1 hour, cool and pulverize After that, powdery plasticized modified polyvinyl alcohol is obtained; cornstarch is prepared into 40% starch milk with water, 1% sodium trimetaphosphate accounting for the mass of dry cornstarch is added, and the pH is adjusted with 0.1mol / L sodium hydroxide solution to 10, react at 50°C for 1.5h, centrifuge, filter, wash with water, dry, pulverize, and sieve to obtain powdery cross-linked starch; weigh 10g of plasticized modified polyvinyl alcohol and 30g of modified starch In 60g of water, stir and mix ev...

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Abstract

The invention relates to a water-soluble ammonium phosphate fertilizer wrapping agent and a preparation method thereof. The water-soluble ammonium phosphate fertilizer wrapping agent comprises the following components in parts by weight: 10-20 parts of plasticized modified polyvinyl alcohol, 10-30 parts of crosslinked starch and 50-80 parts of water, the plasticized modified polyvinyl alcohol is obtained by thermally fusing a plasticizer and polyvinyl alcohol, the crosslinked starch is obtained by carrying out crosslinking reaction on a crosslinking agent and starch under the action of a catalyst, and the plasticized modified polyvinyl alcohol, the crosslinked starch and water are uniformly stirred and mixed to prepare the water-soluble ammonium phosphate fertilizer wrapping agent. The water-soluble wrapping agent is used for wrapping the ammonium phosphate fertilizer, so that the fertilizer is consistent in color inside and outside, free of color difference, high in wrapping capacity, light-proof, sun-proof, temperature-resistant, free of color fading and free of color change, meanwhile, the method is low in use cost and good in anti-caking performance, the fertilizer is coated with the water-soluble wrapping agent, the fertilizer loosening rate reaches 90% or above, the water-soluble wrapping agent can be rapidly biodegraded, and environmental protection is facilitated.

Description

technical field [0001] The invention belongs to the technical field of ammonium phosphate wrapping, and in particular relates to a water-soluble ammonium phosphate fertilizer wrapping agent and a preparation method thereof. Background technique [0002] At present, the production capacity of my country's phosphate and compound fertilizer industry is seriously overcapacitated, especially the competition among ammonium phosphate companies is becoming increasingly fierce, and the appearance and quality of fertilizers are getting more and more attention from the market and fertilizer companies. Ammonium phosphate often has problems such as moisture absorption, whitening, and gloss fading during production, storage, and transportation, especially in high-temperature and high-humidity weather, which seriously affects market sales. [0003] At present, ammonium phosphate wraps the fertilizer surface with a wrapping agent, which can initially improve the moisture-proof, agglomeratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G5/30C05G3/30
CPCC05G5/30C05G5/37C05G3/30C05B7/00
Inventor 王仁宗华佳李淑华
Owner HUBEI FORBON NEW MATERIAL CO LTD
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