METHOD OF MANUFACTURING HYDROGEN CHLORIDE GAS WHICH HARDLY CONTAINS HYDROGEN BROMIDE AND HYDROGEN CHLORIDE AQUEOUS SOLUTION WHICH HARDLY CONTAINS HYDROGEN BROMIDE

摘要

PROBLEM TO BE SOLVED: To provide a method of separation and purification of hydrogen chloride gas and a hydrogen chloride aqueous solution.

SOLUTION: The method comprises the steps of (a) preparing hydrogen chloride gas containing hydrogen bromide; (b) passing the hydrogen chloride gas containing hydrogen bromide into a hydrogen chloride aqueous solution saturated with hydrogen chloride; (c) separating the hydrogen chloride aqueous solution containing hydrogen bromide saturated with hydrogen chloride; and optionally (d) passing the hydrogen chloride gas which is obtained in the step (b) and hardly contains hydrogen bromide into water to obtain a hydrogen chloride aqueous solution which hardly contains hydrogen bromide. Optionally, the hydrogen chloride aqueous solution which is prepared in the step (d) and hardly contains hydrogen bromide is recirculated through the step (b).

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