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Potassium sulfate crystal growth accelerant and application thereof

A technology of crystal growth and accelerator, applied in the direction of alkali metal sulfite/sulfite, alkali metal compound, inorganic chemistry, etc., can solve the problems of inconvenient operation, irritation, occupational diseases of staff, etc., and achieve cost saving. Effect

Inactive Publication Date: 2015-11-11
莫红兵 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when alcohol is used as a precipitant, although it is operable in the laboratory, in the specific industrial application process, because alcohol is flammable, explosive, and irritating, the most commonly used methanol is also toxic and corrosive. ; and methanol, ethanol, n-propanol, isopropanol and other alcohols have strict storage requirements in production, inconvenient operation, and many potential safety hazards
A little negligence may cause major safety accidents (such as burning, explosion); the staff may suffer from occupational diseases during the production process
[0003] In the actual production of potassium sulfate crystals prepared by precipitation with alcohols for half a year, methanol leakage occurred, and the operators had headaches, nausea and other discomfort symptoms, which led to the shutdown of the factory for process transformation

Method used

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  • Potassium sulfate crystal growth accelerant and application thereof
  • Potassium sulfate crystal growth accelerant and application thereof
  • Potassium sulfate crystal growth accelerant and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In the aqueous solution that potassium ion concentration is 128g / L, add ammonium sulfate solid (the mass ratio of ammonium sulfate and potassium ion=2.7) and potassium sulfate crystal growth accelerator (the mass ratio=0.052 of accelerator and potassium ion, crystal accelerator consists of : The mass ratio of sodium tripolyphosphate, diammonium hydrogen phosphate, magnesium sulfate, urea and sodium chloride is 0.25:0.15:0.32:0.08:0.20), after stirring for 300min, filter, the filter residue enters the potassium sulfate refining process, and adds wet residue 80% by weight of ammonia solution with pH=8.5 was stirred and refined for 30 minutes, filtered and dried to obtain potassium sulfate product.

[0036] Table 1.1 is the potassium sulfate product quality data that embodiment 1 produces

[0037]

Embodiment 2

[0039] In the aqueous solution that potassium ion concentration is 128g / L, add ammonium sulfate solid (the mass ratio of ammonium sulfate and potassium ion=2.7) and potassium sulfate crystal growth promoter (the mass ratio=0.078 of accelerator and potassium ion, crystal promoter consists of : The mass ratio of sodium tripolyphosphate, diammonium hydrogen phosphate, magnesium sulfate, urea and sodium chloride is 0.25:0.15:0.32:0.08:0.20), after stirring for 300min, filter, the filter residue enters the potassium sulfate refining process, and adds wet residue 80% by weight of ammonia solution with pH=8.5 was stirred and refined for 30 minutes, filtered and dried to obtain potassium sulfate product.

[0040] Table 2.1 is the potassium sulfate product quality data that embodiment 2 produces

[0041]

Embodiment 3

[0043] In the aqueous solution that potassium ion concentration is 128g / L, add ammonium sulfate solid (the mass ratio of ammonium sulfate and potassium ion=3.05) and potassium sulfate crystal growth promoter (the mass ratio=0.065 of accelerator and potassium ion, crystal promoter consists of : The mass ratio of sodium tripolyphosphate, diammonium hydrogen phosphate, magnesium sulfate, urea and sodium chloride is 0.25:0.15:0.32:0.08:0.20), after stirring for 300min, filter, the filter residue enters the potassium sulfate refining process, and adds wet residue 80% by weight of ammonia solution with pH=8.5 was stirred and refined for 30 minutes, filtered and dried to obtain potassium sulfate product.

[0044] Table 3.1 is the potassium sulfate product quality data that embodiment 3 produces

[0045]

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Abstract

The invention discloses a potassium sulfate crystal growth accelerant and application thereof. The crystal growth accelerant is composed of sodium triphosphate, diammonium hydrogen phosphate, magnesium sulfate, urea and sodium chloride. The potassium sulfate crystal growth accelerant is simple, safe and capable of efficiently crystallizing potassium sulfate on the premise that no alcohol substances are used. The invention also provides application of the potassium sulfate crystal growth accelerant which is capable of obtaining high-quality potassium sulfate products, safe, efficient and low in cost.

Description

technical field [0001] The invention relates to a potassium sulfate crystal growth accelerator and application thereof. Background technique [0002] In the prior art, alcohol is commonly used as a precipitant to promote the generation of potassium sulfate crystals. The principle of action is that when alcohol is used as a precipitant, the solubility of potassium sulfate in a mixed solution of soluble alcohol and water is larger than that in a pure aqueous solution decline in magnitude. However, when alcohol is used as a precipitant, although it is operable in the laboratory, in the specific industrial application process, because alcohol is flammable, explosive, and irritating, the most commonly used methanol is also toxic and corrosive. and several alcohols such as methyl alcohol, ethanol, n-propanol, and isopropanol have strict storage requirements in production, are inconvenient to operate, and have many potential safety hazards. A little negligence may cause major saf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D5/00
Inventor 莫红兵陈志周念
Owner 莫红兵
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