| abstract |
4-Chloro-4'-hydroxybenzophenone - preferably prepared by reaction of 4-chlorobenzoyl chloride and phenol using AlCl3 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. K2CO3 at 330 {C, to yield poly(ether ketone) - PEK - with excellent properties. |