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Method for preparing pharmaceutical grade potassium chloride with sea salt potassium chloride

A kind of potassium chloride and pharmaceutical grade technology, applied in the field of purification of alkali metal halides, can solve the problems of high corrosion resistance of equipment, complex process, large equipment investment, etc., to reduce energy consumption of production process, simplify process flow, The effect of reducing production costs

Active Publication Date: 2012-02-29
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the disadvantages of high energy consumption per ton of product, large water consumption, large medical expenses, complex process, high requirements for equipment corrosion resistance, and large equipment investment.

Method used

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  • Method for preparing pharmaceutical grade potassium chloride with sea salt potassium chloride
  • Method for preparing pharmaceutical grade potassium chloride with sea salt potassium chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1. refer to figure 1 . A method for producing pharmaceutical grade potassium chloride with sea salt potassium chloride, the steps are as follows:

[0022] (1) After the sea salt potassium chloride is crushed until loose, it is continuously and stably added to the crystallizer in proportion to the circulating mother liquor and the secondary washing liquid, and the stirring speed of the crystallizer is controlled so that the materials in the reaction zone of the crystallizer are in a fully mixed flow state; The residence time of the reaction materials in the crystallizer is 0.1 hour; the weight ratio of sea salt potassium chloride, circulating mother liquor and secondary washing liquid is 1:2:0.2;

[0023] (2) under the premise of ensuring system stability, the crystallizer underflow of continuous or intermittent, stable discharge; the weight concentration of the crystallizer underflow is 5%; the crystallizer underflow obtains a product and a filtrate through ce...

Embodiment 2

[0026] Example 2. refer to figure 1 . A method for producing pharmaceutical grade potassium chloride with sea salt potassium chloride, the steps are as follows:

[0027] (1) After the sea salt potassium chloride is crushed until loose, it is continuously and stably added to the crystallizer in proportion to the circulating mother liquor and the secondary washing liquid, and the stirring speed of the crystallizer is controlled so that the materials in the reaction zone of the crystallizer are in a fully mixed flow state; The residence time of the reaction materials in the crystallizer is 10 hours; the weight ratio of sea salt potassium chloride, circulating mother liquor and secondary washing liquid is 1:20:2;

[0028] (2) under the premise of ensuring system stability, the crystallizer underflow of continuous or intermittent, stable discharge; the weight concentration of the crystallizer underflow is 35%; the crystallizer underflow obtains a product and a filtrate through ce...

Embodiment 3

[0031] Example 3. refer to figure 1 . A method for producing pharmaceutical grade potassium chloride with sea salt potassium chloride, the steps are as follows:

[0032] (1) After the sea salt potassium chloride is broken until loose, it is continuously and stably fed into the crystallizer in proportion to the circulating mother liquor and the secondary washing liquid, and the stirring speed of the crystallizer is controlled so that the materials in the reaction zone of the crystallizer are in a fully mixed flow state; The residence time of the reaction materials in the crystallizer is 1 hour; the weight ratio of sea salt potassium chloride, circulating mother liquor and secondary washing liquid is 1:5:1;

[0033] (2) under the premise of ensuring system stability, the crystallizer underflow of continuous or intermittent, stable discharge; the weight concentration of the crystallizer underflow is 20%; the crystallizer underflow obtains a product and a filtrate through centri...

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Abstract

The invention relates to a method for preparing pharmaceutical grade potassium chloride with sea salt potassium chloride, which is characterized in that the sea salt potassium chloride is crushed to be loose and added into a crystallizer by a certain ratio together with circulating mother liquor and secondary washing liquid, so that materials in a crystallizer reaction area interflow; crystallizer underflow is discharged under the premise of ensuring system stability; the crystallizer underflow is centrifuged and separated to obtain a primary product and primary filtrate; and then the primaryproduct, saturated potassium chloride solution and secondary washing liquid are added into a stirring tank by a certain ratio to be size-mixed and washed, centrifuged and separated to obtain a secondary product and secondary washing liquid; and the secondary product, the saturated potassium chloride solution and deionized water are added into the stirring tank by a certain ratio to be size mixed and washed, centrifuged and separated so as to obtain pharmaceutical grade potassium chloride and saturated potassium chloride solution.

Description

technical field [0001] The invention relates to a method for preparing potassium chloride, in particular to a method for producing medical-grade potassium chloride by using sea salt potassium chloride as a raw material, and belongs to the technical field of purification of alkali metal halides. Background technique [0002] Potassium chloride is an important inorganic chemical raw material and agricultural fertilizer. Potassium ion is an essential nutrient for human growth. It accounts for 5% of the inorganic salt in the human body, and is very important for maintaining a healthy nervous system and regulating heart rhythm. It protects against strokes, maintains normal muscle contractions, and works with sodium to maintain fluid balance. The main production method of traditional Chinese medicine grade potassium chloride in the prior art is: add water to dissolve potassium chloride, adjust the pH value precipitation with alkali to remove elements such as calcium, magnesium, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D3/14
Inventor 林浩宇李学字李永华陆汉鑫董自斌
Owner BLUESTAR LEHIGH ENG INST CO LTD
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