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Production method for granular ferric trichloride hexahydrate

A kind of technology of ferric chloride hexahydrate and production method, applied in directions such as ferric halide, can solve problems such as easy deliquescence process, low purity of ferric chloride, complexity and the like

Active Publication Date: 2017-05-31
TANGSHAN 3R CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Based on this, it is necessary to provide a production method of granular ferric chloride hexahydrate for the problems of low purity, deliquescence and complex process of solid ferric chloride produced by traditional ferric chloride production process

Method used

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  • Production method for granular ferric trichloride hexahydrate
  • Production method for granular ferric trichloride hexahydrate

Examples

Experimental program
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Embodiment 1

[0062] Add 2.6t of industrial hydrochloric acid in the stirring tank, and the acidity of industrial hydrochloric acid is 0.52% in terms of HCl. Add 2.5 t of ferrous chloride tetrahydrate solid into industrial hydrochloric acid, stir and dissolve to obtain ferrous chloride solution. Continue to add 1.35t industrial hydrochloric acid in ferrous chloride, in terms of HCl, the acidity of industrial hydrochloric acid is 31.16%, stir well, make Fe in the solution 2+ The molar ratio with HCl is 1:1.03;

[0063] Transport the ferrous chloride solution into the oxidation reaction kettle, add 6.5kg of catalyst sodium nitrite solution, add oxygen from the middle of the reaction kettle, control the internal pressure of the reaction kettle to 0.08MPa, and the reaction temperature to 75°C, through the circulation pump, The reaction solution is circulated from the bottom of the reactor to the top of the reactor, and then sprayed into the reactor from the top of the reactor, and continuously o...

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Abstract

The invention relates to a production method for granular ferric trichloride hexahydrate. The production method for the granular ferric trichloride hexahydrat includes the steps that solid ferrous chloride is directly added into a hydrochloric acid solution, a ferric trichloride solution is obtained through an oxidation reaction, and is evaporated and concentrated, cooling crystallization is carried out, and solid suspension liquid with the solid-liquid volume ratio of (0.8-1.2):(0.98-1.1) is obtained; then the solid suspension liquid is subjected to solid-liquid separation, the obtained solid is subjected to crushing granulation, and the high-purity granular ferric trichloride hexahydrate which is not prone to deliquescence is obtained. In addition, according to the production method for the granular ferric trichloride hexahydrate, a traditional chloro-alkali industry production line and cold storage facilities do not need to be matched, artificial putting molding and artificial demolding are not required, and the production method is simple.

Description

technical field [0001] The invention relates to the technical field of ferric chloride production methods, in particular to a production method of granular ferric chloride hexahydrate. Background technique [0002] At present, as a traditional chemical agent, ferric chloride is widely used in water treatment, printed circuit board etching, pigments, etc., especially in water treatment. Although both iron salt water purifiers and aluminum salt water purifiers have good effects, the residual aluminum in aluminum salt water purifiers can cause the problem of Alzheimer's disease. Therefore, iron salts with ferric chloride as the main component Water purifiers are gradually replacing aluminum salt water purifiers and becoming the main water treatment agent. [0003] The traditional solid ferric chloride production process is mainly divided into two categories: [0004] One type is the chlorination method using chlorine gas and iron filings as raw materials to produce ferric chl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/10
CPCC01G49/10C01P2004/32
Inventor 肖晋宜樊文星吴勇基余德福李楚喜何开景陈晓玲林树杰
Owner TANGSHAN 3R CHEM CO LTD
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