Global Patent Index - EP 1315855 A1

EP 1315855 A1 2003-06-04 - METHOD AND DEVICE FOR THE CONTINUOUS, SINGLE-STEP PRODUCTION OF A HOMOGENEOUS SOLUTION OF CELLULOSE IN HYDROUS TERTIARY AMINOXIDES

Title (en)

METHOD AND DEVICE FOR THE CONTINUOUS, SINGLE-STEP PRODUCTION OF A HOMOGENEOUS SOLUTION OF CELLULOSE IN HYDROUS TERTIARY AMINOXIDES

Title (de)

VERFAHREN UND VORRICHTUNG ZUR KONTINUIERLICHEN, EINSTUFIGEN HERSTELLUNG EINER HOMOGENEN LÖSUNG VON CELLULOSE IN WASSERHALTIGEN TERTIÄREN AMINOXIDEN

Title (fr)

PROCEDE ET DISPOSITIF POUR LA PRODUCTION EN CONTINU, EN UNE SEULE ETAPE, D'UNE SOLUTION HOMOGENE DE CELLULOSE DANS DES OXYDES D'AMINES TERTIAIRES CONTENANT DE L'EAU

Publication

EP 1315855 A1 (DE)

Application

EP 00972575 A

Priority

DE 0003035 W

Abstract (en)

[origin: WO0220885A1] The invention relates to a method and to a device for the continuous, single-step production of a homogeneous solution of cellulose in hydrous aminoxides on the basis of cellulose and aqueous aminoxides, preferably N-methylmorpholino-N-oxide (NMMO), at temperatures in the range of from 50 to 130 DEG C under a vacuum and water evaporation. The cellulose and the NMMO are dosed separately to the device, mixed while sheared, the water is evaporated until the mixture is dissolved, the solution is homogenized and directly fed to the consumer via screw conveyors, pumps and filters.

IPC 1-7 (main, further and additional classification)

D01F 2/00; C08B 1/00; C08J 3/09; C08J 3/11; D01D 1/02

IPC 8 full level (invention and additional information)

D01F 2/00 (2006.01); C08B 1/00 (2006.01); C08J 3/09 (2006.01); C08J 3/11 (2006.01); D01D 1/02 (2006.01)

CPC (invention and additional information)

C08B 1/003 (2013.01); D01D 1/02 (2013.01); D01F 2/00 (2013.01)

Citation (search report)

See references of WO 0220885A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 0220885 A1 20020314; CA 2427478 A1 20030304; CN 1211508 C 20050720; CN 1454267 A 20031105; EP 1315855 A1 20030604; US 6875756 B1 20050405

INPADOC legal status


2009-09-30 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20090401

2008-03-12 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: D01F 2/00 20060101AFI20080207BHEP

2008-03-12 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: D01D 1/02 20060101ALI20080207BHEP

2008-03-12 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: C08B 1/00 20060101ALI20080207BHEP

2008-03-12 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: C08J 3/11 20060101ALI20080207BHEP

2008-03-12 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: C08J 3/09 20060101ALI20080207BHEP

2007-09-12 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20070809

2003-06-04 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20030304

2003-06-04 [AK] DESIGNATED CONTRACTING STATES:

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE