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A salt-resistant functional coating slow/controlled release fertilizer and preparation method thereof

A technology of controlled-release fertilizers and functional packages, which is applied in the direction of layered/coated fertilizers, alkaline orthophosphate fertilizers, calcium fertilizers, etc., can solve the problems of slow/controlled release of nutrients and poor water resistance, and reduce the The risk of soil pollution, the realization of environmental friendliness, and the effect of improving slow and controlled release performance

Active Publication Date: 2020-06-09
北京中盛正兴投资发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these inorganic coated fertilizers are cheap and the process is simple, their slow / controlled release of nutrients is poor and their water resistance performance factors restrict their application and promotion.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046]Weigh 10kg of 16-16-16 Russian Akon compound fertilizer. Put the fertilizer granules in the drum, turn on the switch to preheat the core until the temperature is constant at 80°C. Weigh 150g of 1,5-naphthalene diisocyanate, add 50g of paraffin, put it in a heating kettle and melt it at a constant temperature to 80°C to make a coating solution a; weigh 230g of polytetrahydrofuran diol, 20g of terpene resin, dilaurate dilaurate Put 18g of butyltin catalyst, 10g of polymaleic acid crosslinking agent, and 10g of paraffin wax in a heating kettle to melt to a constant temperature of 85°C to make coating liquid b; weigh 100g of high-activity polyether triol and 20g of oxalic acid crosslinking agent , 100 g of 2,6-diisocyanatohexanoic acid, and 20 g of terpene resin were placed in a heating kettle to 80° C. to prepare coating solution c. Turn on the proportional pump to mix the two components a and b through the high-efficiency mixer, set the pressure of the pressure nozzle to ...

Embodiment 2

[0048] Weigh 10kg of Wolfte organic-inorganic compound fertilizer. The fertilizer granules are placed in the drum, and the switch is turned on to preheat the core until the temperature is constant at 80°C. Weigh 100g of hexamethylene diisocyanate biuret, 100g of dimethyl biphenyl diisocyanate, 12g of tetramethylbutanediamine, add 20g of film-forming aid paraffin, 30g of petroleum resin, and place in a heating kettle to melt and keep the temperature To 80°C, make coating solution a. Weigh 150g of polycarbonate diol, 100g of castor oil, 100g of sulfonated paraffin, and 15g of paraffin, put them in a heating kettle and melt to a constant temperature of 85°C to prepare coating solution b. Weigh 150g of polyethylene succinate, 100g of glycerin, 28g of ethylenediaminoethanesulfonic acid, and 15g of sulfonated paraffin, put them in a heating kettle and melt them to a constant temperature of 85°C to prepare coating solution c. Turn on the proportional pump to mix the two components ...

Embodiment 3

[0050] Weigh 3kg of urea, 4kg of potassium sulfate, 2kg of diammonium hydrogen phosphate, 1kg of ammonium nitrate, 100g of zinc sulfate, 100g of ferrous sulfate, 100g of calcium chloride, 5g of sodium selenite and 1kg of starch to prepare a particle size of 2~ 6mm particles. The prepared core particles were placed in a drum, and the switch was turned on to preheat the core until the temperature was constant at 80°C. Weigh 200g of triphenylmethane triisocyanate, 13g of tetramethylbutanediamine, add 20g of film-forming aid glycerin, and 30g of petroleum resin, put them in a heating kettle and melt at a constant temperature of 80°C to prepare coating solution a. Weigh 100 g of polyurea polyol, 50 g of polyethylene polyol, 100 g of polycarbonate diol, 10 g of epoxypropylamine, and 10 g of formaldehyde, and melt them in a heating kettle to a constant temperature of 85° C. to prepare coating liquid b. Weigh 150g of aromatic polyester polyol, 52g of diethylene glycol isophthalate-5-...

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Abstract

The invention discloses an anti-salt functional coated slow / controlled release fertilizer and a preparation method thereof. The fertilizer comprises a core and a coating layer wrapping the surface of the core. The core comprises a fertilizer particle, the coating layer is prepared from carboxylic acid polyurethane, sulfonate group polyurethane, sulfate group polyurethane or sulfite polyurethane materials, injury to seedlings can be avoided by controlling the release speed of quick-dissolving nutrients in saline alkali soil through the coating materials, carboxylic acid, sulfonate groups, sulfate groups or sulfite groups on the coating materials can interact with salt ions on saline alkali soil particles, the salt ions are efficiently replaced, and saline alkali damage is remarkably reduced. The coated slow / controlled release fertilizer is high in salt resistance and excellent in nutrient slow release performance, and the weight of the coating materials is 2%-10% that of the core. Besides, the coating materials have biodegradability and solve environmental problems caused by difficulty in degrading controlled release fertilizer coating materials.

Description

technical field [0001] The invention relates to the field of fertilizers, in particular to a salt-resistant functional coated slow / controlled release fertilizer and a preparation method thereof. Background technique [0002] Saline-alkali soil, also known as saline soil, the salt content in the soil is above 0.2%, the soil colloid absorbs a certain amount of exchangeable sodium, and the alkalization degree is above 15%. The clay content in the soil particle composition is relatively high, and the texture is sticky. Heavy, poor water permeability, strong plasticity and cohesion, scattered soil particles, poor structure, which seriously restricts the development and utilization of saline-alkali soil. According to the second national soil census, the area of ​​saline-alkali soil in my country is as high as 100 million hectares. my country's cultivated land resources have been relatively fully tapped, and the further improvement of conventional cultivated land productivity is f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00C05G5/30C05G3/40
CPCC05B7/00C05G1/00C05G5/30C05C1/00C05C9/00C05D1/02C05D3/00C05D9/02C05F11/00
Inventor 胡树文汪顺义冯浩杰高子登任雪芹
Owner 北京中盛正兴投资发展有限公司
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