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Process for preparing agricultural slow-release nitrogen fertilizer by regenerating powdery amino resin

A technology of amino resin and slow-release nitrogen fertilizer, applied in nitrogen fertilizer, agriculture, application, etc., can solve problems such as polluted air quality, polluted water body and soil, and deterioration of living environment, achieving good slow-release effect and prolonged release time

Active Publication Date: 2020-05-19
爱克太尔新材料(南京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past two years, with the rapid growth of the production of amino resin adhesives, the amount of solid waste generated due to factors such as production control, storage conditions, and use conditions is about 200,000 tons. Most of the current treatment methods are incineration and landfill. This treatment method not only seriously pollutes the air quality, pollutes the water body and the soil, but also causes the deterioration of the living environment to a greater extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] Add 2kg of choline chloride and 4kg of urea into the mixing container, adjust the temperature in the mixing container to 88°C, and stir evenly for 12 minutes to prepare a deep eutectic ionic liquid; then add 24kg of powder into the mixing container amino resin and 30kg of water, adjust the temperature in the mixing container to 85°C, stir and activate, and the activation time is 120min; Release nitrogen fertilizer liquid; The amino resin slow-release nitrogen fertilizer liquid that will make is put into granulator and carry out granulation, the obtained amino resin slow-release nitrogen fertilizer granule, particle average diameter is 3.5mm; Put into drier again and dry, The inlet temperature of the dryer is 140°C, the outlet temperature is 60°C, and the drying time is 25 minutes, so that the slow-release nitrogen fertilizer based on amino resin regeneration can be obtained.

[0023] The performance indicators of the product are as follows: initial nitrogen release rate...

example 2

[0025] Add 2kg of choline chloride and 3kg of urea into the mixing container, adjust the temperature in the mixing container to 85°C, and stir evenly for 10 minutes to prepare a deep eutectic ionic liquid; then add 25kg of powder into the mixing container Amino resin and 20kg of water, adjust the temperature in the mixing container to 88°C, stir and activate, and the activation time is 180min; Release nitrogen fertilizer liquid; The amino resin slow-release nitrogen fertilizer liquid that will make is put into granulator and carry out granulation, the obtained amino resin slow-release nitrogen fertilizer granule, particle average diameter is 3.5mm; Put into drier again and dry, The inlet temperature of the dryer is 160°C, the outlet temperature is 55°C, and the drying time is 0min, that is, the slow-release nitrogen fertilizer based on amino resin regeneration can be obtained.

[0026] The performance indicators of the product are as follows: initial nitrogen release rate: 12%...

example 3

[0028] Add 2kg of choline chloride and 5kg of urea into the mixing container, adjust the temperature in the mixing container to 90°C, and stir evenly for 15 minutes to prepare a deep eutectic ionic liquid; then add 21kg of powder into the mixing container Amino resin and 21kg of water, adjust the temperature in the mixing container to 78°C, stir and activate, the activation time is 150min; then cool down the temperature in the mixing container to 35°C, and then the material can be discharged to make amino resin slow Release nitrogen fertilizer liquid; The amino resin slow-release nitrogen fertilizer liquid that will make is put into granulator and carry out granulation, the obtained amino resin slow-release nitrogen fertilizer granule, particle average diameter is 3.5mm; Put into drier again and dry, The inlet temperature of the dryer is 150°C, the outlet temperature is 65°C, and the drying time is 20 minutes, so that the slow-release nitrogen fertilizer based on amino resin re...

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Abstract

The invention relates to the technical field of slow-release nitrogen fertilizer production. The invention further discloses a process method for preparing the agricultural slow-release nitrogen fertilizer by crushing and regenerating the waste amino resin. The preparation method comprises the following steps: preparing choline chloride and urea into eutectic ionic liquid, activating and degradingthe crushed powdery waste amino resin and processing the amino resin into amino resin slow-release nitrogen fertilizer liquid, and granulating and drying the nitrogen fertilizer liquid to finally obtain the amino resin slow-release nitrogen fertilizer. The initial nitrogen release rate of the slow-release nitrogen fertilizer is 1.5-2 times of the nitrogen release rate of common urea formaldehyde,the effective slow-release total amount is about 2-2.5 times of that of common urea formaldehyde, the effective release time is prolonged by 3-4 weeks, and the slow-release nitrogen fertilizer has agood slow-release effect.

Description

technical field [0001] The invention relates to the technical field of slow-release nitrogen fertilizer production, in particular to a process for preparing agricultural slow-release nitrogen fertilizer through regeneration of powdered amino resin. Background technique [0002] Amino resin adhesives include UF urea-formaldehyde resin, UMF melamine-modified urea-formaldehyde resin and MF melamine-formaldehyde resin, all of which contain ammonia (-NH 2 Or -NH) groups of compounds and aldehydes reaction polymerization product, its dosage accounts for more than 80% of the amount of wood-based panel adhesives, played an important role in the wood-based panel industry. In the past two years, with the rapid growth of the production of amino resin adhesives, the amount of solid waste generated due to factors such as production control, storage conditions, and use conditions is about 200,000 tons per year. Most of the current treatment methods are incineration and landfill. This tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/40C05G3/90C05G5/12
CPCC05C9/00C05G3/00Y02P60/21
Inventor 张茜
Owner 爱克太尔新材料(南京)有限公司
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