Purification of diphenyl terephthalate

Details Purification of diphenyl terephthalate Purification of diphenyl terephthalate

1975-01-27

1977-04-26

Myers, Jane S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 6980, C07C 6982

Patent

active

040200990

ABSTRACT:
Diphenyl phthalates are purified by crystallizing them from dipolar-aprotic solvents or solutions of solvents containing such solvents. The phthalate solutions are advantageously, but not necessarily, treated in a carbon column in hydrocarbon solvent without dipolar-aprotic solvents present to remove part of the color and impurities, and then dipolar-aprotic solvents are added to the solution before crystallization to aid in the final removal of color and impurities.

REFERENCES:
patent: 3705186 (1972-12-01), Naskar et al.
Parker, Chemical Reviews, 69, vol. pp. 1-32 (1969).

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