METHOD FOR SEPARATING METHANOL FROM THE REACTION PRODUCTS RESULTING FROM THE ACIDIFICATION OF C4 TO C7 ISOOLEFINS WITH METHANOL.

摘要

The reaction product from etherification of C4-C7 isoolefins with methanol in the presence of an acidic catalyst is washed with water in the presence of inert hydrocarbons thereby removing methanol and a part of the tertiary alcohol. The aqueous extract solution bottoms is distilled to separate methanol as overhead. Tertiary alcohols are withdrawn as a side stream from a tray of the distillation column with a high concentration thereof and fed into the washing column.