METHOD FOR PRODUCING 4,4'-ISOPROPYLIDENEDITHIOBIS[2,6-DI-tert-BUTYLPHENOL] AND INTERMEDIATE THEREFOR

摘要

PROBLEM TO BE SOLVED: To industrially advantageously produce 2,6-di-tert-butyl-4-mercaptophenol from bis(3,5-di-tert-butyl-4-hydroxyphenyl) polysulfide in good efficiency without requiring a large apparatus and without using a heavy metal such as lead and bismuth. SOLUTION: The bis(3,5-di-tert-butyl-4-hydroxyphenyl) polysulfide is reduced by zinc in a mixed solvent of a hydrocarbon-based solvent which may be halogenated and a 2-4C alcohol. COPYRIGHT: (C)2004,JPO