Removal of HCl by distilling a vinyl chloride feed in solution with an alcohol
AssigneeRhone-Progil
InventorsYves Correia, Jean-Claude Lanet
Life of this patent
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Abstract
Process for removing hydrochloric acid and other impurities which are contained in vinyl chloride monomer, by treatment in a distillation zone, comprising the addition to crude vinyl chloride, in the course of distillation thereof, of at least one alcohol selected from the group of C.sub.4 to C.sub.10 tertiary aliphatic alcohols and C.sub.3 to C.sub.10 primary or secondary alcohols with unsaturation in the alpha position, and rectifying the vinyl chloride monomer from the resulting mixture.
Claims9
In a process for removing hydrochloric acid and other impurities which are contained in crude vinyl chloride monomer, by treatment in a distillation zone, the improvement comprising, adding to the crude vinyl chloride at least one alcohol selected from the group consisting of C.sub.4 to C.sub.10 tertiary aliphatic alcohols and C.sub.3 to C.sub.10 primary and secondary alcohols with unsaturation in the alpha position, in a molar ratio equal to at least one mole of alcohol to one mole of hydrochloric acid, said alcohol reacting chemically with hydrochloric acid within said zone.
Dependencies are inferred from the claim text.