METHOD FOR PRODUCING VITAMIN A ACETATE

• Main Authors: EXNER KAI MICHAEL, LAAS HARALD, MASSONNE KLEMENS, SZARVAS LASZLO, GLAS DETLEV
• Format: Patent
• Language: English
• Published: 12.02.2009
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; APPARATUS THEREFOR; CHEMISTRY; GENERAL METHODS OF ORGANIC CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

The present invention relates to a process for preparing vitamin A acetate by reacting beta-vinylionol with triphenylphosphine in the presence of sulfuric acid in a solvent mixture consisting of 60 to 80% by weight methanol, 10 to 20% by weight water and 10 to 20% by weight aliphatic, cyclic or arom...