Preparation method for food-grade potassium chloride

A manufacturing method and technology of potassium chloride, which is applied in the field of potassium salt manufacturing, can solve the problems of low purity of food-grade potassium chloride, and achieve the effects of improving purification purity, increasing solubility, and reasonable design

Inactive Publication Date: 2018-09-28
连云港景悦食品配料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the preparation of current food-grade potassium chloride, the potassium chloride material is first put into a dissolving tank in distilled water for dissolving and then crystallized. The process is simple, and the prepared food-grade potassium chloride has a low purity.

Method used

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  • Preparation method for food-grade potassium chloride
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  • Preparation method for food-grade potassium chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1, a kind of manufacture method of food grade potassium chloride, its steps are as follows:

[0046] (1) Dissolution: Under normal pressure, add potassium chloride raw material with a purity of 85% into the dissolution kettle, add pure water or the circulating mother liquor produced during the purification process to dissolve, stir and heat up to 95°C while dissolving, and the stirring speed is at Control at 500r / min until the potassium chloride solution is saturated;

[0047] (2) Pre-filtration: transfer the dissolved potassium chloride saturated solution into the pre-filtration device, the filtration accuracy of the pre-filtration device is not less than 2mm, and obtain the potassium chloride pre-filtration slurry;

[0048] (3) Fine filtration: The potassium chloride pre-filtered slurry is fine-filtered with a fine-filtration device, the fine-filtration pressure is 0.1kpa, the filtration accuracy is 1μm, and the fine-filtration speed is 7000L per 10 minutes...

Embodiment 2

[0052] Embodiment 2, a kind of manufacture method of food grade potassium chloride, its steps are as follows:

[0053] (1) Dissolution: Under normal pressure, add potassium chloride raw material with a purity of 90% into the dissolution kettle, add pure water or the circulating mother liquor produced during the purification process to dissolve, stir and heat up to 100°C while dissolving, and the stirring speed is at Control at 900 r / min until the potassium chloride solution is saturated;

[0054] (2) Pre-filtration: transfer the dissolved potassium chloride saturated solution into the pre-filtration device, the filtration accuracy of the pre-filtration device is not less than 2mm, and obtain the potassium chloride pre-filtration slurry;

[0055] (3) Fine filtration: the potassium chloride pre-filtered slurry is fine-filtered with a fine-filtration device, the fine-filtration pressure is 0.2kpa, the filtration accuracy is 1μm, and the fine-filtration speed is 7000L per 15 minut...

Embodiment 3

[0059] Embodiment 3, a kind of manufacture method of food grade potassium chloride, its steps are as follows:

[0060] (1) Dissolution: Under normal pressure, add potassium chloride raw material with a purity of 90% into the dissolution kettle, add pure water or the circulating mother liquor produced during the purification process to dissolve, stir and heat up to 100°C while dissolving, and the stirring speed is at Control at 700 r / min until the potassium chloride solution is saturated;

[0061] (2) Pre-filtration: transfer the dissolved potassium chloride saturated solution into the pre-filtration device, the filtration accuracy of the pre-filtration device is not less than 2mm, and obtain the potassium chloride pre-filtration slurry;

[0062] (3) Fine filtration: The potassium chloride pre-filtered slurry is fine-filtered with a fine-filtration device, the fine-filtration pressure is 0.15kpa, the filtration accuracy is 1μm, and the fine-filtration speed is 7000L per 15 minu...

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Abstract

The invention relates to a preparation method for food-grade potassium chloride. The preparation method for the food-grade potassium chloride comprises the following steps: adding a potassium chlorideraw material in a dissolving kettle; adding pure water or circulating mother liquor for dissolving the potassium chloride raw material until the potassium chloride raw material is saturated; pre-filtering and fine-filtering the potassium chloride saturated solution obtained by dissolving; and cooling and crystallizing to obtain potassium chloride crystal slurry; and carrying out condensing, solid-liquid separation and drying to obtain the purified food-grade potassium chloride of which the water content is lower than 0.15%. The method is reasonable in design, by effectively controlling over the steps and parameters, the purification efficiency is greatly improved, the purification purity is improved, and the highest purity of the product can reach 99.99%.

Description

technical field [0001] The invention belongs to a method for producing potassium salt, in particular to a method for producing food-grade potassium chloride. Background technique [0002] Potassium chloride is a colorless elongated rhomboid or a cubic crystal. It can be used as an electrolyte balance regulator with definite clinical curative effect. It can also be used for low sodium salt and various food additives. [0003] Present food-grade potassium chloride is prepared by first putting potassium chloride material into a dissolving tank in distilled water for dissolving and then crystallizing. The process is simple, and the prepared food-grade potassium chloride has relatively low purity. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a method for manufacturing food-grade potassium chloride with reasonable design, high purification efficiency and high product purity for the deficiencies of the prior art. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D3/14C01D3/16
CPCC01D3/14C01D3/16C01P2006/82
Inventor 刘玉
Owner 连云港景悦食品配料有限公司
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