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Method for producing sustained-release granular potassium chloride fertilizer

A production method and technology of slow-release granules are applied in the directions of potash fertilizers, inorganic fertilizers, fertilizer mixtures, etc., to achieve the effects of short technological process, low production cost and convenient operation.

Active Publication Date: 2014-03-05
HENAN LEEF FERTILIZER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no report on the technology of using granular potassium chloride to produce slow-release fertilizers

Method used

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  • Method for producing sustained-release granular potassium chloride fertilizer
  • Method for producing sustained-release granular potassium chloride fertilizer

Examples

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example 1

[0025] Preparation of coating agent: 53 parts (mass) of linseed oil, 9.3 parts (mass) of glycerin, 8.3 parts (mass) of polyether, and 0.18 parts (mass) of calcium naphthenate are added in a high-temperature reactor, and nitrogen protection is carried out. While stirring, heat up to 250°C±2°C, react under heat preservation for 2 hours, stop heating and stirring. Put the reaction materials into the low-temperature reaction kettle immediately, turn on the stirrer of the low-temperature reaction kettle, maintain the temperature of the material at 60°C, pass through nitrogen protection, and add 29 parts (mass) of TDI-80 into the low-temperature reaction kettle at 60-65°C, Addition was complete in about 45 minutes. While adding TDI-80, add 20 parts (mass) of xylene. After TDI was added, 80 parts (mass) of xylene was added into the low-temperature reactor. After stirring and mixing the materials evenly, heat up to 90-93°C, react for 30 minutes and cool down to 50-53°C, add 5 parts ...

example 2

[0029] Preparation of the coating agent: 55 parts (mass) of linseed oil, 9.5 parts (mass) of glycerin, 8.4 parts (mass) of polyether, and 0.2 parts (mass) of calcium naphthenate are added to a high-temperature reactor, and nitrogen protection is carried out. While stirring, heat up to 250°C±2°C, react under heat preservation for 2 hours, stop heating and stirring. Put the reaction materials into the low-temperature reactor immediately, turn on the stirrer of the low-temperature reactor, maintain the temperature of the material at 60°C, pass through nitrogen protection, and add 30 parts (mass) of TDI-80 into the low-temperature reactor at 63°C, about 40 minutes to join. While adding TDI-80, add 20 parts (mass) of xylene. After the TDI-80 was added, 80 parts (mass) of xylene was added to the low-temperature reaction kettle. After stirring and mixing all materials evenly, heat up to 86-90°C, react for 30 minutes and cool down to 54°C, add 5.5 parts (mass) of stabilizer methanol...

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Abstract

The invention relates to a method for producing a sustained-release granular potassium chloride fertilizer and belongs to the technical field of manufacture of fertilizers. The method comprises the specific steps of: preparation of a membrane coating agent and a granular potassium chloride coating membrane; adding linseed oil, glycerin, polyether and calcium naphthenate into a high-temperature reaction kettle, reacting for 2 hours at the temperature of 250 DEG C, putting the materials into a low-temperature reaction kettle, regulating the temperature of the materials to be 60 DEG C, adding toluene diisocynate (TDI-80) to the low-temperature reaction kettle, and simultaneously adding dimethylbenzene in batches; uniformly agitating and mixing, heating to raise the temperature to 80-95 DEG C, reacting for a period of time, cooling to 50-55 DEG C, adding methanol to agitate for a period of time, and adding cobalt naphthenate, lead naphthenate, diacetylmonoxime to uniformly agitate the mixture. A certain amount of granular potassium chloride is added into a fluidized bed coating machine, the air inlet temperature of the fluidized bed coating machine is controlled to be 70-100 DEG C, the wind pressure of an inlet is controlled, the membrane coating agent is sprayed into potassium chloride particles at the ratio to perform membrane coating, the potassium chloride particles are cooled and sieved, and the qualified particles are packaged to obtain the finished product after being coated by the membrane.

Description

technical field [0001] The invention relates to a production method of slow-release granular potassium chloride fertilizer, which belongs to the field of fertilizer manufacturing technology, and in particular to a method for manufacturing granular potassium chloride slow-release fertilizer by using granular potassium chloride as a raw material. Background technique [0002] Potassium is one of the three major elements of fertilizers. Potassium in plants generally accounts for 0.2% to 4.1% of dry matter weight, second only to nitrogen. Potassium participates in the activation of more than 60 enzyme systems, photosynthesis, transport of assimilated products, carbohydrate metabolism and protein synthesis during plant growth and development. [0003] The main varieties of potash fertilizers are potassium chloride, potassium sulfate, potassium nitrate, potassium dihydrogen phosphate, etc. Potassium chloride and potassium sulfate account for more than 95% of potash fertilizer pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00C05D1/02
Inventor 万亚珍张文辉谷守玉
Owner HENAN LEEF FERTILIZER
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