Process for the purification of diphenyl carbonate

Details Process for the purification of diphenyl carbonate Process for the purification of diphenyl carbonate

1995-06-05

1996-02-27

Richter, Johann

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbonate esters

C07C 6808

Patent

active

054950384

ABSTRACT:
This invention provides a process for the purification of diphenyl carbonate (DPC) from crude products of diphenyl carbonate production. In this process, crude products are used that have a distillable fraction consisting of over 70 wt. % diphenyl carbonate and are fractionally crystallised from the melt (fractionating melt crystallisation).

REFERENCES:
patent: 4013702 (1977-03-01), Cartier et al.
patent: 5239106 (1993-08-01), Shafer
Fraktionierte Kristallisation, Sulzer Chemtech (Aug., 1992).

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