WERKWIJZE VOOR HET BEREIDEN VAN HYDROXYBIFENYL.

摘要

Hydroxydiphenyl is prepared by dehydrogenating a starting material comprising completely and/or partly hydrogenated hydroxydiphenyl in a gaseous phase in the presence of a dehydrogenation catalyst and a compound having the formula WHEREIN R1, R2 and R3, which may be the same or different, each represents a linear or optionally branched alkyl radical having up to 6 carbon atoms, in addition to which R3 can also represent a hydrogen atom, IS ADDED AS A STABILIZER TO THE STARTING MATERIAL BEFORE IT COMES INTO CONTACT FOR THE FIRST TIME WITH AND AND/OR OTHER OXYGEN-CONTAINING GASES.