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

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

C - Chemistry, Metallurgy

07

C

260/472.4, 260/4

C07C 67/03 (2006.01) C07C 69/76 (2006.01)

Patent

CA 1334295

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 transesterifica- tion catalyst on cooling yields solid dialkyl naphthalene-2,6-dicarboxylate which may be collected by filtration and further purified by recrystalliza- tion 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.

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