Production method of chemical reagent potassium chloride

A technology of chemical reagents and production methods, applied in the direction of alkali metal chloride, alkali metal halide purification, etc., can solve problems such as difficult to achieve, and achieve the effect of no pollution to the environment

Inactive Publication Date: 2016-06-15
SHANGHAI GUANCHUN FINE CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these processes are difficult to reach the national standard of GB646-93 chemical reagent potassium chloride

Method used

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Experimental program
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Embodiment 1

[0027] In the embodiment of the present invention, a kind of production method of chemical reagent potassium chloride comprises the following steps:

[0028] (1) Raw ore screening: firstly collect the carnallite dried in the salt field into the raw ore warehouse, then use reciprocating screens to screen out larger ore nuggets and other sundries in the raw ore, and the screened raw ore enters the crusher for crushing After that, it is transported to the mixing tank;

[0029] (2) Slurry: add water to the slurry tank for slurry, control the raw ore solid content in the slurry to 28-32wt% (preferably 30wt%); then add sodium chloride capture agent to the slurry tank as a floating Select the agent, and at the same time, use the air compressor to input 0.8-0.9MPa air into the slurry tank from the annular pipe at the bottom of the slurry tank, so that a large number of bubbles will emerge in the slurry tank. After stirring, the sodium chloride in the slurry will Selectively attach to...

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PUM

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Abstract

The invention discloses a production method of the chemical reagent potassium chloride, which comprises: (1) raw ore screening; (2) slurry mixing; (3) flotation; (4) low-sodium concentration and dehalogenation; Crystallization and screening of crude potassium; (6) concentration and dehalogenation of crude potassium; (7) washing and centrifugal dehydration; (8) re-dissolving; (9) two-stage filtration; (10) re-crystallization; (11) dehydration and separation. The process of the present invention not only increases the recovery rate of potassium chloride to over 62%, but also effectively removes soluble impurities and insoluble matter in the crude potassium chloride product with a purity of 95%, thereby increasing the purity of the potassium chloride product to over 99%. The process of the invention can be operated continuously, has no pollution to the environment, and is easy to realize industrialization.

Description

technical field [0001] The invention relates to the technical field of chemical reagent production, in particular to a production method of the chemical reagent potassium chloride. Background technique [0002] Potassium chloride is colorless and slender rhomboid or a cubic crystal, or white crystalline small-grained powder, which looks like table salt, odorless and salty, and is often used as an additive for low-sodium salt and mineral water. Potassium chloride is mainly used in the inorganic industry and is the basic raw material for the manufacture of various potassium salts or alkalis such as potassium hydroxide, potassium sulfate, potassium nitrate, potassium chlorate, and potassium alum. In the pharmaceutical industry, it is used as a diuretic and a drug for preventing and treating potassium deficiency. The dye industry is used to produce G salt, reactive dyes, etc. In agriculture, it is a kind of potassium fertilizer. Its fertilizer effect is fast, and it can be dir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D3/08C01D3/14
CPCC01D3/08C01D3/14
Inventor 曹志远
Owner SHANGHAI GUANCHUN FINE CHEM TECH CO LTD
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