EP 0000159 B2 19841219 - METHOD OF TREATING BUTANEDIOL OBTAINED IN THE CONDENSATE RESULTING FROM THE PRODUCTION OF POLYBUTYLENE TEREPHTHALATES

Title (en)

METHOD OF TREATING BUTANEDIOL OBTAINED IN THE CONDENSATE RESULTING FROM THE PRODUCTION OF POLYBUTYLENE TEREPHTHALATES

Publication

EP 0000159 B2 19841219 (DE)

Application

EP 78100177 A 19780616

Priority

DE 2728407 A 19770624

Abstract (en)

[origin: US4154970A] A process for treating butanediol obtained as a condensate during the manufacture of polybutylene terephthalate, wherein an alkali metal alcoholate or alkali metal hydride is added to the condensate at an elevated temperature. After purification, the butanediol obtained is re-used for the manufacture of polybutylene terephthalate.

IPC 1-7

C07C 29/74; C07C 31/20

IPC 8 full level

C07C 27/00 (2006.01); C07C 29/74 (2006.01); C07C 29/88 (2006.01); C07C 31/20 (2006.01); C07C 67/00 (2006.01); C08G 63/00 (2006.01); C08G 63/91 (2006.01)

CPC (source: EP US)

C07C 29/74 (2013.01 - EP US); C07C 29/88 (2013.01 - EP US)

C-Set (source: EP US)

Designated contracting state (EPC)

BE DE FR GB NL

DOCDB simple family (publication)

EP 0000159 A1 19790110; EP 0000159 B1 19800723; EP 0000159 B2 19841219; DE 2728407 A1 19790104; DE 2860045 D1 19801113; IT 1096585 B 19850826; IT 7824767 A0 19780620; JP S5412305 A 19790130; JP S629094 B2 19870226; US 4154970 A 19790515

DOCDB simple family (application)

EP 78100177 A 19780616; DE 2728407 A 19770624; DE 2860045 T 19780616; IT 2476778 A 19780620; JP 7552878 A 19780623; US 91364378 A 19780608