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Method and apparatus for producing hydrochloric acid

A manufacturing method and technology for manufacturing devices, which are applied in separation methods, chemical instruments and methods, halogen/halogen acids, etc., can solve problems such as inability to remove iron ions

Inactive Publication Date: 2016-08-03
SHIN ETSU CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, iron is dissolved in hydrochloric acid in the form of iron ions, so it cannot be easily removed by physical methods such as filters

Method used

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  • Method and apparatus for producing hydrochloric acid
  • Method and apparatus for producing hydrochloric acid
  • Method and apparatus for producing hydrochloric acid

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Experimental program
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Effect test

Embodiment

[0029] Using 4 series of refining columns with 2 columns and 1 group as 1 sequence arranged in parallel figure 1 In the shown device, while inserting the regeneration step of the ion exchange resin, the continuous treatment for removing iron ions from the crude hydrochloric acid extracted from the exhaust gas of the process is carried out.

[0030] It was assumed that crude hydrochloric acid was simultaneously supplied to three of the four trains to perform the iron ion removal step, and only the remaining one train was subjected to the resin regeneration step.

[0031] The resin regeneration step is to implement a series of treatments of a. Residual hydrochloric acid extraction → b. Pure water addition / extraction → c. Pure water continuous supply flow (200 minutes) / extraction. After the resin regeneration of one sequence is completed, crude hydrochloric acid is supplied to the sequence to start the iron ion removal step, the iron ion removal step of the next sequence is stopp...

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Abstract

Hydrochloric acid is produced by capturing hydrogen chloride contained in an exhaust gas resulting from a gas-phase chemical reaction process involving a dehydrochlorination reaction, the hydrochloric acid is guided into one or some refinery columns of a plurality of refinery columns arranged in parallel so that iron ions are removed from the hydrochloric acid, in accordance with deterioration of iron ion removal capability in the one or some refinery columns, the removal of the iron ions from the hydrochloric acid is switched to another one or some of the refinery columns, while the hydrochloric acid is guided into the other one or some refinery columns so that the iron ions are removed from the hydrochloric acid, the deteriorated iron ion removal capability is regenerated.

Description

technical field [0001] The present invention relates to a kind of by SiCl 4 A method and device for producing hydrochloric acid from hydrogen chloride in the waste gas produced in the gas phase chemical reaction process of the dehydrochlorination reaction. Background technique [0002] In the manufacture of synthetic silica such as base materials for optical fibers, it is known that by making the raw material SiCl 4 A method of synthesizing silica microparticles by flame hydrolysis in an oxyhydrogen flame. In this production method, the exhaust gas contains a large amount of silica fine particles not accumulated as a base material, or hydrogen chloride gas generated in the dehydrochlorination reaction during hydrolysis. In order to remove these unaccumulated silica particles or hydrogen chloride gas from the system, silica particles are recovered by using a gas filter such as a filter bag, and hydrogen chloride gas is introduced into a washing tower In the reaction tank, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B7/07B01D53/14B01D53/18
CPCB01D53/1418B01D53/1456B01D53/18C01B7/0706B01D2252/103B01D2257/2045C01B2210/0025C01B2210/0003B01D53/68B01D2258/02C01B7/0718
Inventor 寺嶋正美长尾贵章三好一美
Owner SHIN ETSU CHEM IND CO LTD
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