Recovery of dialkyl naphthalene-2,6-dicarboxylates from naphthal

Details Recovery of dialkyl naphthalene-2,6-dicarboxylates from naphthal Recovery of dialkyl naphthalene-2,6-dicarboxylates from naphthal

1988-05-23

1989-10-24

Lone, Werren B.

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

Organic compounds

Carboxylic acid esters

560 79, 560 80, C07C 6760, C07C 6976

Patent

active

048763780

ABSTRACT:
A process for the formation and recovery of dialkyl naphthalene-2,6-dicarboxylates from poly-(alkylene naphthalene-2,6-dicarboxylate) polyesters. Alcoholysis of poly(ethylene naphthalene-2,6-dicarboxylate) in the presence of a transesterification catalyst on cooling yields solid dialkyl naphthalene-2,6-dicarboxylate which may be collected by filtration and further purified by recrystallization from xylenes. Novel alkyl hydroxyalkyl naphthalene-2,6-dicarboxylate compounds may be isolated from the filtrate and either reconverted to polyester or further alcoholized to dialkyl naphthalene-2,6-dicarboxylate.

REFERENCES:
patent: 3488298 (1970-01-01), Miller

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