Title:
【発明の名称】第3アミンオキシドの水性溶液の精製方法
Document Type and Number:
Japanese Patent JPH08508785
Kind Code:
A
Abstract:
PCT No. PCT/AT95/00022 Sec. 371 Date Aug. 14, 1995 Sec. 102(e) Date Aug. 14, 1995 PCT Filed Feb. 1, 1995 PCT Pub. No. WO95/23885 PCT Pub. Date Sep. 8, 1995The invention is concerned with a process for the production of cellulose molded bodies. This process has the following steps: (A) dissolving cellulose in an aqueous solution of a tertiary amine-oxide to produce a moldable cellulose solution, (B) molding said cellulose solution and conducting said molded cellulose solution into an aqueous precipitation bath, wherein the cellulose is precipitated, thus producing a molded body and a spent precipitation bath, and (C) purifying said spent precipitation bath by contacting said precipitation bath with an ion exchanger, thus producing a purified aqueous amine-oxide solution which, optionally after concentration, is re-used again in step (A) as a cellulose solvent. In this process, the ion exchanger comprises a cellulose carrier which has attached groups which are capable of exchanging ions.
Inventors:
Mule Radar, Eduard
Filgo, Heinrich
Filgo, Heinrich
Application Number:
JP52255995A
Publication Date:
September 17, 1996
Filing Date:
February 01, 1995
Export Citation:
Assignee:
Renting Akchen Gezel Shaft
International Classes:
B01J39/22; B01J41/16; C07C291/04; C08B1/00; D01F2/02; C08J3/09; C08J5/00; C08L1/02; D01F2/00; D01F13/02; (IPC1-7): C08J5/00; C08B1/00; D01F2/00; D01F13/02
Attorney, Agent or Firm:
Atsushi Nakajima (4 people outside)