反应详情

1 mol of phenoxyethanol is esterified azeotropically in the presence of 1.1 mol of H3PO3 in xylene on a water separator. The reaction product which precipitates on cooling is filtered off, washed with petroleum ether and dried to give a white powder. The amount of the phosphoric diester (2-phenoxyethanol hydrogensulphate, 0-50%) which may be formed in this reaction in addition to phenoxyethanol phosphate (phenoxyethanol dihydrogenphosphate) does not interfere in the polycondensation which subsequently takes place; it is also incorporated into the polycondensate.

1. customThe reaction product which precipitates
2. temperatureon cooling
3. filtrationis filtered off
4. washwashed with petroleum ether
5. customdried
6. customto give a white powder