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Barium chloride crystallization method

A barium chloride and crystallization technology, applied in the direction of calcium/strontium/barium chloride, calcium/strontium/barium halide, etc., can solve the energy and time consumption of cooling crystallization, long evaporation and concentration time, large steam energy consumption, etc. problem, achieve the effects of shortening the time, increasing the crystallization rate, and accelerating the crystallization rate

Inactive Publication Date: 2016-05-04
衢州市远方化工厂(普通合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such evaporative crystallization process will undoubtedly consume a large amount of steam energy consumption, and the evaporation and concentration time is long, cooling and crystallization also consumes energy and time, and the efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Get the barium chloride aqueous solution that synthesis reaction makes, weigh barium chloride aqueous solution 2kg, after weighing completes, barium chloride aqueous solution is joined in the crystallizer; Seal the crystallizer, and detect the airtightness of the crystallizer;

[0036] (2) Pass hydrogen chloride gas into the crystallizer, and control the flow rate of hydrogen chloride gas to be 1.0m 3 ; Turn on the stirrer, stir at a stirring rate of 1300r / min, pass hydrogen chloride gas for 5 minutes while stirring, then stop passing hydrogen chloride gas, turn off the stirrer and stand still for 5 minutes, cool the crystallizer to 20 ° C during the standing process, after standing Observe the crystallization of the barium chloride aqueous solution; then again with 1.0m 3 The flow rate of hydrogen chloride gas is passed into the hydrogen chloride gas; the stirrer is turned on, stirred at a stirring rate of 1400r / min, the hydrogen chloride gas is passed through for ...

Embodiment 2

[0041] Crystallization process is the same as embodiment 1, only the flow rate of hydrogen chloride gas in the step (2) is all changed into 1.05m 3 , the amount of precipitation of barium chloride crystals is 201g;

Embodiment 3

[0043] Crystallization process is the same as embodiment 1, only the flow rate of hydrogen chloride gas in step (2) is all changed into 1.10m 3 , the amount of precipitation of barium chloride crystals is 194g;

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Abstract

The invention discloses a barium chloride crystallization method. The method comprises feeding hydrogen chloride gas into a crystallizer, starting a stirrer, feeding hydrogen chloride gas into the crystallizer for 5min along with stirring, stopping hydrogen chloride gas feeding, stopping the stirrer, standing the mixture for 5min, observing barium chloride aqueous solution crystallization cases, feeding hydrogen chloride gas into the barium chloride aqueous solution, starting the stirrer, feeding hydrogen chloride gas into the solution for 5min along with stirring, then stopping hydrogen chloride gas feeding, stopping the stirrer, carrying out standing for 5min, observing barium chloride aqueous solution crystallization cases, repeating the above processes until the barium chloride aqueous solution does not precipitate, carrying out discharging to obtain barium chloride solid slurry and carrying out discharge and centrifugation to obtain barium chloride solids. The hydrochloric acid mother liquor subjected to centrifugation can be recovered and recycled and is used for producing a barium chloride aqueous solution. The method is free of evaporative concentration and cooling crystallization, greatly reduces energy consumption and time and greatly improves efficiency and production power.

Description

technical field [0001] The invention relates to the field of chemical crystallization, in particular to a crystallization method of barium chloride. Background technique [0002] Barium chloride, white crystal or granular powder. Bitter and salty, slightly hygroscopic. It loses water of crystallization at 100°C, but reabsorbs two molecules of water of crystallization when placed in humid air. Soluble in water, soluble in methanol, insoluble in ethanol, ethyl acetate and acetone. The relative density is 3.86, the melting point is 963°C, and the boiling point is 1560°C. Mainly used in metal heat treatment, barium salt manufacture, electronic instruments, also used as heat treatment agent in mechanical processing, determination of sulfate and selenate, chromatographic analysis, spot analysis determination of platinum, water softener, fabric dyeing. [0003] The usual synthesis method of barium chloride is to use barium carbonate to react with hydrochloric acid to release ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/24
CPCC01F11/24
Inventor 叶萍
Owner 衢州市远方化工厂(普通合伙)
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