Improved process for the production of poly (ether ketone) - PEK- and its monomer

摘要

4-Chloro-4'-hydroxybenzophenone - preferably prepared by reaction of 4-chlorobenzoyl chloride and phenol using AlCl 3 catalyst in orthodichlorobenzene solvent - is purified by distillation under vacuum, more conveniently in combination with a solvent such as diphenyl sulfone, to give a high purity monomer which can be polymerized, using, e.g.,K 2 CO 3 at 330°C, to yield poly(ether ketone) - PEK - with excellent properties.