Process for preparing isopropylphenyl/phenyl phosphate

摘要

Monoisopropylphenyl/phenyl phosphate containing mixtures are prepared by, (1) alkylating phenol with propylene to C3/ phi ratio of less than 0.30 with a p-toluene sulfonic acid catalyst, (2) removing unreacted phenol as distillate to yield a distilland having a C3/ phi ratio above 0.3 and thereafter, (3) phosphorylating the distilland to yield a triaryl phosphate mixture having a reduced 2,6-diisopropylphenyl phosphate content.