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Potassium sulfate crystal growth promoter and application thereof

A crystal growth and accelerator technology, applied in the direction of alkali metal sulfite/sulfite, alkali metal compounds, inorganic chemistry, etc., can solve problems such as inconvenient operation, great safety, safety hazards, etc., to avoid safety hazards and improve quality Good, cost-saving effect

Inactive Publication Date: 2016-01-06
莫红兵 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Examples

Experimental program
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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 sulfate is 0.25:0.15:0.32:0.08:0.20), after stirring for 300min, filter, filter residue enters potassium sulfate refining process, add wet residue weight 50% saturated lime water, 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 155g / 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 sulfate is 0.25:0.15:0.32:0.08:0.20), after stirring for 300min, filter, filter residue enters potassium sulfate refining process, add wet residue weight 50% saturated lime water, 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 accelerator (the mass ratio=0.065 of accelerator and potassium ion, crystal accelerator consists of : The mass ratio of sodium tripolyphosphate, diammonium hydrogen phosphate, magnesium sulfate, urea and sodium sulfate is 0.25:0.15:0.32:0.08:0.20), after stirring for 300min, filter, filter residue enters potassium sulfate refining process, add wet residue weight 50% saturated lime water, 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 promoter and application thereof. The crystal growth promoter consists of sodium tripolyphosphate, diammonium hydrogen phosphate, magnesium sulfate, urea and sodium sulfate. The crystal growth promoter is simple, safe, and realizes efficient crystallization of potassium sulfate on the premise of no alcohol. The invention also provides application of the crystal growth promoter, which can obtain high quality potassium sulfate products, and is safe, efficient and low in cost.

Description

technical field [0001] The invention relates to a potassium sulfate crystal growth accelerator and its application. 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 safety ...

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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