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Preparation process of controlled-release and long-acting film-coated fertilizer

A preparation process and long-acting technology, applied in layered/coated fertilizers, organic fertilizers, inorganic fertilizers, etc., can solve problems such as low utilization, waste of human resources, social resources, soil environment, groundwater pollution, etc.

Inactive Publication Date: 2019-01-11
利辛县鑫圣农业科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The utilization of crop straws in my country and even in the world is low, and a large amount of biomass resources have not been rationally utilized
In addition, the nutrient utilization rate of traditional fertilizers is low, and most of the nutrients seep into the ground with irrigation water, causing pollution to the soil environment and groundwater bodies, and also causing a waste of human and social resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation process of slow-release long-acting coated fertilizer, comprising the steps of:

[0021] S1. Mix ammonium bicarbonate, urea, superphosphate, ammonium hydrogen phosphate, potassium chloride, potassium nitrate, sodium humate, zinc sulfate, magnesium sulfate, and boric acid evenly, and add them to a granulator to granulate to obtain fertilizer granules;

[0022] S2. Wash the corn stalks and sorghum stalks respectively, dry them in the air, crush them, put them in an oven and dry them to constant weight, and set them aside;

[0023] S3. After mixing corn stalks, sorghum stalks, glycerin, polyethylene glycol, Tween 80, tungsten trioxide, and concentrated sulfuric acid, stir, heat in an oil bath, control the temperature at 155°C, condense and reflux for 90 minutes, and centrifuge. to obtain a liquid product;

[0024] S4, mixing the liquid product prepared in S3 with polyether polyol, microcrystalline wax, stannous octoate, and triethylenediamine to obtain a mix...

Embodiment 2

[0027] A preparation process of slow-release long-acting coated fertilizer, comprising the steps of:

[0028] S1. Mix ammonium bicarbonate, urea, superphosphate, ammonium hydrogen phosphate, potassium chloride, potassium nitrate, sodium humate, zinc sulfate, magnesium sulfate, and boric acid evenly, and add them to a granulator to granulate to obtain fertilizer granules;

[0029] S2. Wash the corn stalks and sorghum stalks respectively, dry them in the air, crush them, put them in an oven and dry them to constant weight, and set them aside;

[0030] S3. After mixing corn stalks, sorghum stalks, glycerin, polyethylene glycol, Tween 80, tungsten trioxide, and concentrated sulfuric acid, stir, heat in an oil bath, control the temperature at 158°C, condense and reflux for 70 minutes, and centrifuge. to obtain a liquid product;

[0031] S4, mixing the liquid product prepared in S3 with polyether polyol, microcrystalline wax, stannous octoate, and triethylenediamine to obtain a mix...

Embodiment 3

[0034] A preparation process of slow-release long-acting coated fertilizer, comprising the steps of:

[0035] S1, by weight 40 parts of ammonium bicarbonate, 70 parts of urea, 30 parts of superphosphate, 70 parts of ammonium hydrogen phosphate, 20 parts of potassium chloride, 40 parts of potassium nitrate, 60 parts of sodium humate, 30 parts of zinc sulfate , 15 parts of magnesium sulfate, and 35 parts of boric acid are mixed evenly, and added to a granulator to granulate to obtain fertilizer granules with a particle diameter of 3 mm;

[0036] S2. Wash the corn stalks and sorghum stalks respectively, dry them in the air, crush them, put them into an oven set at 103° C., and dry them to constant weight, and set them aside;

[0037] S3. After mixing corn stalks, sorghum stalks, glycerin, polyethylene glycol, Tween 80, tungsten trioxide, and concentrated sulfuric acid in a weight ratio of 20:25:12:77:0.3:0.7:1.9, stir, oil Bath heating, temperature control at 156 ° C, reflux for...

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Abstract

The invention discloses a preparation process of a controlled-release and long-acting film-coated fertilizer. The preparation process contains the following steps: mixing ammonium hydrogen carbonate,urea, calcium superphosphate, ammonium hydrogen phosphate, potassium chloride, potassium nitrate, sodium humate, zinc sulfate, magnesium sulfate and boric acid, and carrying out granulation, so as toobtain fertilizer particles; cleaning corn straws and sorghum straws, airing, crushing, drying, mixing the straws with glycerol, polyethylene glycol, Tween 80, tungsten trioxide and concentrated sulfuric acid, stirring, and carrying out oil-bath heating, condensation reflux and centrifugal separation, so as to obtain a liquid product; uniformly mixing the liquid product with polyether polyol, microcrystalline wax, stannous octoate and triethylenediamine, so as to obtain a mixed solution; preheating the fertilizer particles, atomizing the mixed solution and polymethylene polyphenyl polyisocyanate, and alternately spraying the mixed solution and polymethylene polyphenyl polyisocyanate to the surfaces of the fertilizer particles, maintaining the temeperaure, and cooling. The fertilizer prepared by virtue of the preparation process has good fertilizer efficiency, is long in nutritional release period and capable of preserving moisture and fertility and has good ecological and economic benefits.

Description

technical field [0001] The invention relates to the technical field of agricultural fertilizers, in particular to a preparation process of slow-release and long-acting coated fertilizers. Background technique [0002] The utilization of crop straws in my country and even in the world is low, and a large amount of biomass resources have not been rationally utilized. In addition, the nutrient utilization rate of traditional fertilizers is low, and most of the nutrients seep into the ground with irrigation water, causing pollution to the soil environment and groundwater, and also causing a waste of human and social resources. The crop stalks that rely on a large amount of fertilizers are wasted as waste after the crops are harvested. How to rationally use these discarded crop stalk resources has become the direction of people's continuous efforts. Contents of the invention [0003] Based on the problems in the background technology, the present invention proposes a preparati...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C05G3/08C05G3/80C05G3/90
CPCC05B1/02C05G3/00C05G3/80C05G3/90C05G5/38C05D5/00C05D9/00C05D9/02C05F11/00C05F11/02C05B7/00C05C3/00C05C5/02C05C9/00C05D1/02
Inventor 李清李珂李畅李瑾
Owner 利辛县鑫圣农业科技有限责任公司
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