Processes for purifying conjugated diolefins

Claim 1

A PROCESS FOR THE PURIFICATION OF A CONJUGATED DIOLEFIN WITHOUT THE FORMATION OF SUBSTANTIAL AMOUNTS OF DIOLFIN POLYMERS WHICH COMPRISES CONTACTING THE CONJUGATED DIOLEFIN AT A TEMPERATURE BETWEEN ABOUT 0* AND ABOUT 80*C., IN THE ABSENCE OF OXYGEN, WITH AN ALKALI METAL IN AN AMOUNT BETWEEN 0.1 AND 5 PARTS BY WEIGHT PER HUNDRED PARTS BY WEIGHT OF THE CONJUGATED DIOLEFIN, TOGETHER WITH A HALOGEN-SUBSTITUTED HYDROCARBON OF THE GROUP CONSISTING OF CHLORINE-SUBSTITUTED AND BROMINESUBSTITUTED ARALIPHATIC HYDROCARBONS FREE FROM NONBENZENOID HALLOGNE SUBSTITUENTS, AND CHLORINE-SUBSTITUTED AND BROMINE-SUBSTITUENTS, AND CHLORINE-SUBSTITUTED AND HYDROCARBONS, IN SUCH AN AMOUNT THAT THE RATIO OF ATOMS OF THE HALOGEN IN THE HALOGNE-SUBSTITUTED HYDROCARBON TO ATOMS OF THE ALKALI METAL IS BETWEEN 1:1 AND 2:1 AND SUBSEQUENTLY RECOVERING THE PURIFIED CONJUGATED DIOLEFIN.