Chlorine drying method for chlor-alkali production process

The invention discloses a chlorine gas drying method for a chlor-alkali production process, which comprises the following steps: S1, sequentially introducing concentrated sulfuric acid with the temperature of 5-20 DEG C and the mass concentration of 90-93% into a combined tower and a packed tower wh...

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Bibliographic Details
Main Authors SEO HYEWON, XIE HAOJIANG
Format Patent
LanguageChinese
English
Published 11.10.2022
Subjects
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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Summary:The invention discloses a chlorine gas drying method for a chlor-alkali production process, which comprises the following steps: S1, sequentially introducing concentrated sulfuric acid with the temperature of 5-20 DEG C and the mass concentration of 90-93% into a combined tower and a packed tower which are connected in series for chlorine gas drying to obtain waste sulfuric acid and dry chlorine gas; the introduction amount of the concentrated sulfuric acid is controlled to enable the mass concentration of the obtained waste sulfuric acid to be 76-80%; the pressure of the combined tower and the packed tower is greater than 90kPa; and S2, concentrating the waste sulfuric acid until the mass concentration is 90-93%, and then recycling the waste sulfuric acid. The method has the advantages that the concentrated sulfuric acid realizes low-cost circulation of the whole process from chlorine drying to evaporation and concentration, finally realizes resource utilization of the waste concentrated sulfuric acid in the
Bibliography:Application Number: CN202210863099