A kind of production method of acid potassium thiophosphate

A kind of technology of acid potassium thiophosphate and its production method, which is applied in the field of phosphate production, can solve the problems that there is no good industrial production method for acid potassium thiophosphate, and achieve good market prospects, simple method and high acidity

Active Publication Date: 2018-05-11
CHANHEN ECO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is that acid potassium thiophosphate does not have a good technical problem in the industrialized production method in the prior art

Method used

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  • A kind of production method of acid potassium thiophosphate
  • A kind of production method of acid potassium thiophosphate
  • A kind of production method of acid potassium thiophosphate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh 100kg of potassium sulfate, add it to 60kg of water, start stirring, disperse evenly, heat to 70°C, and make potassium sulfate slurry;

[0037] According to P 2 o 5 / K 2 O mass ratio is 1.0 ratio calculation Weigh 126kg of wet-process phosphoric acid, add it to the evenly stirred potassium sulfate slurry, and react for 3 hours; put the slurry into the drier to atomize and dry, and control the inlet temperature of the drier to 230-270°C. The outlet temperature is 110-130°C to obtain a powdery final product. Product indicators are shown in Table 2.

Embodiment 2

[0039] Weigh 100kg of potassium sulfate, add it to 80kg of water, start stirring, disperse evenly, heat to 90°C, and make potassium sulfate slurry;

[0040] According to P 2 o 5 / K 2 O mass ratio is 0.7 ratio calculation Weigh 88kg of wet-process phosphoric acid, join in the evenly stirred potassium sulfate slurry, react for 2 hours; add the slurry into the drier to atomize and dry, control the inlet temperature of the drier to 300-320°C, The outlet temperature is 90-100°C to obtain a powdery final product. Product indicators are shown in Table 2.

Embodiment 3

[0042] Method is the same as embodiment 1, P 2 o 5 / K 2 O mass ratio control is 1.20, obtains product index and is shown in Table 2.

[0043] Weigh 100kg of potassium sulfate, add it to 90kg of water, start stirring, disperse evenly, heat to 80°C, and make potassium sulfate slurry;

[0044] According to P 2 o 5 / K 2 O mass ratio is the ratio calculation of 1.2 Weigh 151kg of wet-process phosphoric acid, join in the evenly stirred potassium sulfate slurry, react for 4 hours; Add the slurry into the drier to atomize and dry, control the inlet temperature of the drier to 280-300°C, The outlet temperature is 100-105° C. to obtain a powdery final product. Product indicators are shown in Table 2.

[0045] Table 2 Product Index

[0046]

[0047]The method for measuring the acidity is: take 1 g of the sample, dissolve it in 100 ml of water, titrate it with 0.5 mol / L NaOH solution to a pH value of 6.5, and the volume of lye consumed is the acidity of the product. This can m...

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PUM

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Abstract

The invention belongs to the technical field of production of phosphate in inorganic chemical industry and especially relates to a production method of acidic potassium thiophosphate. In the technical scheme, the production method includes the steps of: a) preparing material slurry with potassium sulfate and water; 2) adding phosphoric acid to the material slurry to perform a reaction; and c) drying the reacted material slurry to prepare the acidic potassium thiophosphate. The acidic potassium thiophosphate is high in water-solubility and has high acidity. The method solves the problem that a product, which is prepared by only physically mixing wet-method phosphoric acid and a potassium sulfate raw material, is liable to absorb moisture and cake in the prior art. The method has good market prospect.

Description

technical field [0001] The invention belongs to the technical field of phosphate production in the inorganic chemical industry, in particular to a production method of acid potassium thiophosphate. Background technique [0002] Potassium acid thiophosphate, its molecular structure is: KH 2 PO 4 ·KHSO 4 ·H 3 PO 4 , there are few related reports, and its pH value is about 2.0. [0003] Due to the high phosphorus and potassium content, good water solubility and high acidity of acid potassium thiophosphate products, it is suitable for cotton planting with drip irrigation technology in dry saline-alkali land in Northwest China. When used at the peak of potassium absorption, it can promote early maturity, increase boll weight, and improve cotton quality. During use, the acid potassium thiophosphate fertilizer can be dissolved in water, and then sent to the place where fertilization is required through the drip irrigation pipe, which is very convenient to use. [0004] Howev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D5/02
CPCC01D5/02
Inventor 袁海斌雷波王佳才吴生平黄恒侯隽
Owner CHANHEN ECO TECH CO LTD
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