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1. (WO2001030884) PROCESS FOR PRODUCING POLYTETRAMETHYLENE ETHER DIESTER WITH LOW COLOR NUMBER
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2001/030884 International Application No.: PCT/EP2000/010510
Publication Date: 03.05.2001 International Filing Date: 25.10.2000
Chapter 2 Demand Filed: 23.05.2001
IPC:
C08G 65/20 (2006.01) ,C08G 65/30 (2006.01) ,C08G 65/322 (2006.01)
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
65
Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
02
from cyclic ethers by opening of the heterocyclic ring
04
from cyclic ethers only
06
Cyclic ethers having no atoms other than carbon and hydrogen outside the ring
16
Cyclic ethers having four or more ring atoms
20
Tetrahydrofuran
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
65
Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
02
from cyclic ethers by opening of the heterocyclic ring
30
Post-polymerisation treatment, e.g. recovery, purification, drying
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
65
Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
02
from cyclic ethers by opening of the heterocyclic ring
32
Polymers modified by chemical after-treatment
321
with inorganic compounds
322
containing hydrogen
Applicants:
BERTOLA, Aldo [IT/IT]; IT (UsOnly)
CASSARINO, Salvatore [IT/IT]; IT (UsOnly)
HOBE, Myriam [BE/BE]; BE (UsOnly)
BASF AKTIENGESELLSCHAFT [DE/DE]; 67056 Ludwigshafen, DE (AllExceptUS)
Inventors:
BERTOLA, Aldo; IT
CASSARINO, Salvatore; IT
HOBE, Myriam; BE
Agent:
SARPI, Maurizio; Studio Ferrario Via Collina, 36 I-00187 Roma, IT
Priority Data:
990070327.10.1999BE
Title (EN) PROCESS FOR PRODUCING POLYTETRAMETHYLENE ETHER DIESTER WITH LOW COLOR NUMBER
(FR) PROCEDE DE PRODUCTION DE POLYTETRAMETHYLENE ETHER DIESTER A FAIBLE INDICE DE COLORATION
Abstract:
(EN) A process for producing PTMEA with low color number wherein, after the polymerization of THF, the recovery of the PTMEA product involves the vaporization at nearly atmospheric pressure of unreacted THF followed by stripping of the residual THF, carboxylic acid and carboxylic anhydride in two consecutive stages of stripping, the first one using as stripping medium a mixture of nitrogen, hydrogen and THF, the second one using as stripping medium a mixture of nitrogen and hydrogen with minimum THF content.
(FR) L'invention concerne un procédé de production de PTMEA à faible indice de coloration consistant, après la polymérisation du THF, à récupérer le produit PTMEA par vaporisation à une pression sensiblement voisine de la pression atmosphérique du THF inaltéré et à retirer le THF, l'acide carboxylique et l'anhydride carboxylique résiduels en deux étapes successives. La première étape consiste à utiliser un agent d'enlèvement renfermant un mélange d'azote, d'hydrogène et de THF. La seconde étape consiste à utiliser un agent d'enlèvement renfermant un mélange d'azote et d'hydrogène avec un contenu minimal de THF.
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Designated States: AE, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CR, CU, CZ, DE, DK, DM, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)