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Refinement modulo null of the hydrogen chloride gas which it occurs the occasion where the chloroacetic acid is produced acetic acid by contacting chlorinates with the chlorine gas
Refinement modulo null of the hydrogen chloride gas which it occurs the occasion where the chloroacetic acid is produced acetic acid by contacting chlorinates with the chlorine gas
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机译:精制氯化氢气体的模数,它是通过使氯酸盐与氯气接触生成氯乙酸而产生的
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pHydrogen chloride gas obtained as a by-product in the production of chloroacetic acid by subjecting acetic acid to a catalytic chlorination reaction with chlorine gas in the presence of acetic anhydride and/or acetyl chloride is purified. The prepurified by-product still contains 0.1-3 vol % acetyl chloride and up to 0.1 vol % chloroacetyl chloride. For purification, the hydrogen chloride gas is passed through two zones series-connected together and scrubbed in countercurrent fashion. More particularly, it is scrubbed in the first zone with concentrated hydrochloric acid and in the second zone with concentrated sulfuric acid./p[US4678482A]
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