Method of purifying hydrogen chloride gas
AssigneeRhone-Progil
InventorsYves Correia, Jean Lesparre
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Abstract
The invention concerns a method of purifying hydrogen chloride gas containing small quantities of chlorine. The purifying method comprises passing impure hydrogen chloride over carbon, at a temperature from 30.degree. to 200.degree. C, in the presence of at least one olefin, possibly containing chlorine. The method of the invention applies particularly to the hydrogen chloride obtained from a chloroethane cracking operation initiated by chlorine.
Claims7
A method of purifying hydrogen chloride gas containing small quantities of free chlorine, without removal of hydrogen chloride, consisting essentially of adding at least one olefin to the impure hydrogen chloride in an amount to provide a molar ratio of olefin to free chlorine within the range of 10-1 moles of olefin to 1 mole of free chlorine, and passing the mixture in a gaseous state over activated carbon at a temperature within the range of 30.degree. to 200.degree. C.
Dependencies are inferred from the claim text.