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Preparation method of pharmaceutical grade ferric trichloride product

A ferric chloride, pharmaceutical-grade technology, applied in ferric halide and other directions, can solve the problems of meager profits, low output and high production costs, and achieve the effects of economical and easy-to-obtain raw materials, simple operation and stable product quality.

Active Publication Date: 2020-03-24
3R ENVIRONMENTAL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the very high requirements on the purity of pharmaceutical grade ferric chloride, especially the heavy metal index is very strict, in order to meet the technical index requirements, the domestic commonly used method is to add high-purity iron to produce industrial hydrochloric acid, but the production cost is quite high and the profit is meager. , which limits the use of the production process
At present, there are not many domestic enterprises that can produce pharmaceutical grade ferric chloride, the output is small, and the quality is unstable, which seriously affects the supply and use of medicinal ferric chloride.

Method used

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  • Preparation method of pharmaceutical grade ferric trichloride product
  • Preparation method of pharmaceutical grade ferric trichloride product

Examples

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Effect test

Embodiment 1

[0024] 1. Take 2kg of ferrous chloride solid, dissolve it in an appropriate amount of water, properly heat until the solid is dissolved, and add 200g of synthetic industrial hydrochloric acid to prevent the hydrolysis of ferrous and heavy metals;

[0025] 2. The ferrous chloride solution passes through a filter to remove the insoluble matter in the solution. The mass concentration of ferrous chloride is 38-45%, and it is naturally cooled to 10-20°C. The upper mother liquor is pumped away, the lower crystals are centrifuged at 800 r / min by a centrifuge until no mother liquor remains, the ferrous chloride crystals are washed with 5% hydrochloric acid solution and then centrifuged to obtain high-purity ferrous chloride solids.

[0026] 3. Dissolve the high-purity ferrous chloride solid in a proper amount of 1% hydrochloric acid solution, oxidize with chlorine to 0.005~0.01% ferrous, and then add a small amount of sodium chlorate solution to oxidize ferrous to reach pharmaceutical grade...

Embodiment 2

[0032] 1. Take 2kg of ferrous chloride solid, dissolve it in an appropriate amount of water, properly heat until the solid is dissolved, and add 200g of synthetic industrial hydrochloric acid to prevent the hydrolysis of ferrous and heavy metals;

[0033] 2. The ferrous chloride solution is passed through a filter to remove the insoluble matter in the solution, concentrated by evaporation to a mass concentration of ferrous chloride of 38-45%, and naturally cooled to 10-20°C. The upper mother liquor is pumped away, the lower crystals are centrifuged at 2000 r / min until no mother liquor remains, and the ferrous chloride crystals are washed with 10% hydrochloric acid solution and then centrifuged to obtain high-purity ferrous chloride solids.

[0034] 3. Dissolve the high-purity ferrous chloride solid in a proper amount of 1% hydrochloric acid solution, oxidize with chlorine to 0.005~0.01% ferrous, and then add a small amount of sodium chlorate solution to oxidize ferrous to reach phar...

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Abstract

The invention discloses a preparation method of a pharmaceutical grade ferric trichloride product, and the method comprises the following steps: dissolving a raw material ferrous chloride solid in water, adding hydrochloric acid to obtain a ferrous chloride solution, filtering, and removing insoluble substances in the solution; evaporating and concentrating the obtained filtrate until the mass fraction is 38-45%; naturally cooling, standing, extracting upper-layer mother liquor, and centrifuging lower-layer crystals through a centrifugal machine until no mother liquor is left, so as to obtaina ferrous chloride solid; dissolving the ferrous chloride solid in a hydrochloric acid solution to obtain a ferrous chloride liquid; oxidizing the ferrous chloride liquid with chlorine, adding a smallamount of sodium chlorate for many times to oxidize until ferrous chloride reaches the standard of pharmaceutical grade ferric trichloride, evaporating and concentrating until the content of ferric trichloride is 58-63%, cooling, adding seed crystals, slowly stirring, transferring into the centrifugal machine, and centrifuging until no mother liquor is left. The method is simple to operate and stable in quality, and can effectively remove various impurities in the raw materials, so that various indexes of the product can stably meet the index requirements of the pharmaceutical grade ferric trichloride.

Description

Technical field [0001] The invention relates to the technical field of compound purification, in particular to a method for preparing a pharmaceutical grade ferric chloride product. Background technique [0002] Ferric chloride (ferric chloride), chemical formula FeCl3. Is a covalent compound. It is black-brown crystal, also flake-like, with a melting point of 306°C and a boiling point of 315°C. It is easily soluble in water and has strong water absorption. It can absorb moisture in the air and deliquescence. When FeCl3 precipitates from the aqueous solution, there are six crystal waters as FeCl3·6H2O, and ferric chloride hexahydrate is an orange crystal. [0003] Ferric chloride is a very important iron salt, mainly used for metal etching and sewage treatment. Among them, the etching includes the etching of copper, stainless steel, aluminum and other materials. It has good effect and low price for the treatment of low-oil raw water. Advantages, but bring the disadvantage of yel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/10
CPCC01G49/10C01P2006/80
Inventor 周小江丁德才车莹杨柳荫朱浩王权永
Owner 3R ENVIRONMENTAL TECH CO LTD
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