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A method for preparing slow-release fertilizer by inorganic secondary adsorption

A secondary adsorption and slow-release fertilizer technology, applied in the direction of nitrate fertilizers, fertilizer mixtures, nitrogen fertilizers, etc., can solve the problems of difficult preparation and high cost of slow-release fertilizers, simplify the preparation process, improve soil water shortage, slow down good release effect

Active Publication Date: 2019-02-19
史丹利化肥扶余有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the current problems of high cost and difficult preparation of slow-release chemical fertilizers, so as to obtain slow-release fertilizers with long-lasting fertilizer effects and good comprehensive economic benefits

Method used

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  • A method for preparing slow-release fertilizer by inorganic secondary adsorption

Examples

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Effect test

example 1

[0037] First add 3kg of attapulgite and 2kg of bentonite into a low-speed mixer, add 245mL of absolute ethanol as a dispersant, and stir for 2 hours at a speed of 40r / min. Then add 35kg of potassium nitrate powder, continue to stir for 20min, then add 70mL of tetraethyl orthosilicate, continue to stir for 2h. With above-mentioned similar method and proportioning, with 2kg attapulgite and 2kg bentonite, with deionized water as dispersant, 6kg calcium phosphate and 6kg calcium hydrogen phosphate are absorbed; With 3kg attapulgite and 2kg bentonite, with tetrachloro Use carbonized carbon as a dispersant to absorb 15kg of urea. Then the obtained fertilizers were filtered separately, dried in a vacuum oven, and crushed to 60-100 mesh. Then take 8kg of white carbon black and 8kg of diatom powder, add 0.4kg of 3-aminopropyltriethoxysilane, and mix them at high speed. Then take 8kg of expanded perlite, first heat and expand, then pretreat with ammonia water after cooling, then add 0...

example 2

[0039] First add 3kg of attapulgite and 3kg of bentonite to a low-speed mixer, add 280mL of absolute ethanol as a dispersant, and stir for 2 hours at a speed of 40r / min. Then add 40kg of potassium nitrate powder, continue to stir for 20min, then add 40mL of ethyl orthosilicate, continue to stir for 3h. With above-mentioned similar method and proportioning, with 3kg attapulgite and 2kg bentonite, with deionized water as dispersant, 6kg calcium phosphate and 5kg calcium hydrogen phosphate are adsorbed; With 2kg attapulgite and 2kg bentonite, with tetrachloride Carbonization is used as a dispersant to absorb 14kg of urea. Then the obtained fertilizers were filtered separately, dried in a vacuum oven, and crushed to 60-100 mesh. Then take 7kg of white carbon black and 6kg of diatom powder, add 0.3kg of 3-aminopropyltriethoxysilane, and mix at high speed. Then take 7kg of expanded perlite, first heat and expand, then pretreat with ammonia water after cooling, then add 0.2kg of 3-...

example 3

[0041] First add 3kg of attapulgite and 2kg of bentonite into a low-speed mixer, add 301mL of absolute ethanol as a dispersant, and stir for 2 hours at a speed of 40r / min. Then add 43kg of potassium nitrate powder, continue to stir for 20min, then add 45mL of ethyl orthosilicate, continue to stir for 4h. With above-mentioned similar method and proportioning, with 3kg attapulgite and 2kg bentonite, with deionized water as dispersant, 5kg calcium phosphate and 5kg calcium hydrogen phosphate are adsorbed; With 3kg attapulgite and 2kg bentonite, with tetrachloride Use carbonized carbon as a dispersant to absorb 12kg of urea. Then the obtained fertilizers were filtered separately, dried in a vacuum oven, and crushed to 60-100 mesh. Then take 7kg of white carbon black and 8kg of diatom powder, add 0.3kg of 3-aminopropyltriethoxysilane, and mix at high speed. Then take 6kg of expanded perlite, first heat and expand, then pretreat with ammonia water after cooling, then add 0.2kg of ...

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Abstract

The invention relates to a method for preparing slow-release fertilizer through inorganic two-stage adsorption. By adopting by weight, 35-45 parts of potassium nitrate, 5-8 parts of calcium phosphate, 5-8 parts of calcium hydrophosphate, 12-20 parts of urea, 5-10 parts of attapulgite, 5-10 parts of bentonite, 5-10 parts of white carbon black, 5-10 parts of kieselguhr and 5-10 parts of expanded perlite as main raw materials, the compound ecological fertilizer with a good slow-release effect is formed through the processes of two-stage adsorption of porous inorganic powder materials and readsorption of meshy porous materials, wherein attapulgite and bentonite account for 12-16 parts totally, and white carbon black, kieselguhr and expanded perlite account for 20-25 parts totally. The obtained inorganic adsorption slow-release fertilizer has the advantages of being low in cost, lasting and controllable in fertilizer effect, simple in preparation process and the like.

Description

technical field [0001] The invention relates to a method for preparing a compound ecological fertilizer, in particular to a method for preparing a slow-release fertilizer through inorganic secondary adsorption. Background technique [0002] Chemical fertilizer plays an important role in agricultural production and is the largest material investment in agricultural production, accounting for about 50% of its total productive expenditure. According to the Food and Agriculture Organization of the United Nations, 55% of the increase in food production in developing countries comes from the role of chemical fertilizers. The relationship between my country's fertilizer input and food basically conforms to this rule. With the development of high-yield, high-efficiency, and high-quality agriculture, the status of chemical fertilizers in my country's agriculture will become more important. my country's agriculture has become the world's largest producer of chemical fertilizers and co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/80
CPCC05B17/00C05G3/00C05G3/20C05G3/80C05C5/02C05C9/00
Inventor 陈庆曾军堂叶任海陈兵
Owner 史丹利化肥扶余有限公司
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