Global Patent Index - EP 1080114 A1

EP 1080114 A1 2001-03-07 - METHOD FOR ACTIVATING AND DERIVATIZING CELLULOSE

Title (en)

METHOD FOR ACTIVATING AND DERIVATIZING CELLULOSE

Title (de)

VERFAHREN ZUR AKTIVIERUNG UND DERIVATISIERUNG VON CELLULOSE

Title (fr)

PROCEDE POUR L'ACTIVATION ET LA DERIVATISATION DE CELLULOSE

Publication

EP 1080114 A1 (DE)

Application

EP 99919228 A

Priority

  • DE 19817454 A
  • EP 9902472 W

Abstract (en)

[origin: DE19817454A1] Use of an N-oxide for activating cellulose. A process for activating cellulose comprising the steps of: (a) dissolving the cellulose in a water-containing N-oxide; (b) coagulating the dissolved cellulose by adding a suitable solvent and optionally (c) alkalising the amorphous cellulose obtained in stage (b). The amorphous cellulose obtained in stage (b) or (c) may be derivatised, optionally in the presence of a suitable solvent (separately claimed).

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

C08B 1/00

IPC 8 full level (invention and additional information)

C08B 1/00 (2006.01); C08B 1/08 (2006.01); C08B 11/02 (2006.01)

CPC (invention and additional information)

C08B 1/08 (2013.01); C08B 1/00 (2013.01)

Citation (search report)

See references of WO 9954361A1

Designated contracting state (EPC)

AT BE DE DK ES FR GB IT NL

EPO simple patent family

DE 19817454 A1 19991021; AU 3707599 A 19991108; EP 1080114 A1 20010307; JP 2002512271 A 20020423; PL 343492 A1 20010827; WO 9954361 A1 19991028

INPADOC legal status


2003-07-30 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20030114

2002-09-11 [RTI1] TITLE (CORRECTION)

- Free text: METHOD FOR DERIVATIZING CELLULOSE

2001-04-11 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010226

2001-03-07 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20001120

2001-03-07 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE DE DK ES FR GB IT NL