PRODUCTION METHOD AND PRODUCTION APPARATUS FOR HIGH PURITY HYDROCHLORIC ACID

Japanese Patent JP2016138017

A

PROBLEM TO BE SOLVED: To provide a production method and a production apparatus for high purity hydrochloric acid in each of which hydrochloric acid is extracted from an exhaust gas generated in a gas-phase chemical reaction process accompanied by a dehydrochlorination reaction and iron ions of a high concentration contained in the hydrochloric acid can be continuously and stably removed.SOLUTION: The production method for high purity hydrochloric acid is provided in which: hydrogen chloride in an exhaust gas is captured in a gas-phase reaction process accompanied by a dehydrochlorination reaction to produce hydrochloric acid, which is led to purification columns arranged in parallel for removing iron ions; when the capacity for removal of the iron ions is degraded in a purification column, the removal of the iron ions is switched to another purification column, while the degraded capacity for removal of the iron ions is recovered; treatment of hydrochloric acid and recovery of the capacity for removal of the iron ions are practiced alternately by orderly switching the purification columns arranged in parallel; and thus the production of the hydrochloric from the exhaust gas and the removal of the iron ions in the hydrochloric acid are performed continuously.SELECTED DRAWING: Figure 1

TERAJIMA MASAMI
NAGAO TAKAAKI
MIYOSHI KAZUMI

JP2015013858A

August 04, 2016

January 28, 2015

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SHINETSU CHEMICAL CO

C01B7/01

JPH0328102A	1991-02-06
JPS5969152A	1984-04-19
JPS5198695A	1976-08-31
JPS51119396A	1976-10-19
JPS58104001A	1983-06-21
JPH04231303A	1992-08-20
JPH0710504A	1995-01-13
JP2004137118A	2004-05-13
JP2007254194A	2007-10-04
JP2011136854A	2011-07-14

Eiichiro Shimazaki

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