EP 1863862 A1 20071212 - METHOD AND DEVICE FOR MULTI-STAGE VACUUM GENERATION DURING THE PRODUCTION OF POLYESTERS

Title (en)

METHOD AND DEVICE FOR MULTI-STAGE VACUUM GENERATION DURING THE PRODUCTION OF POLYESTERS

Title (de)

VERFAHREN UND VORRICHTUNG ZUR MEHRSTUFIGEN VAKUUMERZEUGUNG BEI DER POLYESTERHERSTELLUNG

Title (fr)

PROCEDE ET DISPOSITIF DE PRODUCTION DE VIDE EN PLUSIEURS ETAPES DANS LE CADRE DE LA PRODUCTION DE POLYESTERS

Publication

EP 1863862 A1 20071212 (DE)

Application

EP 05819253 A 20051209

Priority

EP 2005013185 W 20051209
DE 102005012732 A 20050319

Abstract (en)

[origin: WO2006099895A1] The invention relates to a method and to a corresponding device for multi-stage vacuum generation during the production of polyesters or copolyesters by esterifying dicarboxylic acids and diols or by transesterifying dicarboxylic acid esters and diols in a number or reaction stages. The method is characterized by the following steps: 1. The vapors (1) are drawn from a final reactor and directly into a first jet nozzle (2) inside of which they are condensed; 2. The condensed vapors (1), together with a supplied propellant gas (3), form a vapor/operating steam mixture and are guided in a first injection condenser (4) in parallel flow with the injected diol (5); 3. The vapor/operating steam mixture is largely compressed by the injected diol (5) and on the walls of the first injection compressor (4) that are wetted by diol; 4. The polymers discharged from the first injection compressor (4) with the exiting diol (5) are separated out.

IPC 8 full level

C08G 63/78 (2006.01)

CPC (source: EP KR)

B01J 3/006 (2013.01 - EP); B01J 4/002 (2013.01 - EP); B01J 19/26 (2013.01 - EP); C08G 63/46 (2013.01 - KR); C08G 63/78 (2013.01 - KR); C08G 63/785 (2013.01 - EP)

Citation (search report)

See references of WO 2006099895A1

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

DOCDB simple family (publication)

DE 102005012732 A1 20060921; CN 1903908 A 20070131; EA 200702018 A1 20080428; EP 1863862 A1 20071212; JP 2008533251 A 20080821; KR 20070122494 A 20071231; TW 200634048 A 20061001; WO 2006099895 A1 20060928

DOCDB simple family (application)

DE 102005012732 A 20050319; CN 200610068235 A 20060320; EA 200702018 A 20051209; EP 05819253 A 20051209; EP 2005013185 W 20051209; JP 2008501170 A 20051209; KR 20077023954 A 20071018; TW 95108019 A 20060309