1
Stefan Zikeli, Bernd Wolschner, Dieter Eichinger, Raimund Jurkovic, Heinrich Firgo: Process and arrangement for preparing a solution of cellulose. Lenzing Aktiengesellschaft, Brumbaugh Graves Donohue & Raymond, March 10, 1992: US05094690 (38 worldwide citation)

There is disclosed a process for preparing solutions of cellulose in aqueous tertiary amine oxides from a suspension of cellulose in an aqueous solution of the tertiary amine oxide by supplying heat at a reduced pressure. The suspension is transported over a heating surface, spread in layers or coat ...


2
Raimund Jurkovic, Heinrich Firgo, Dieter Eichinger, Stefan Zikeli: Method of producing shaped cellulosic articles. Lenzing Aktiengesellschaft, Herbert Dubno, October 12, 1993: US05252284 (38 worldwide citation)

A cellulosic solution in a amine oxide and water is forced through an elongated orifice passage having a minimum length of 1000 /.mu.m and a minimum diameter along the length which is up to 150 /.mu.m so that fiber characteristics are imparted to the emerging strand which passes through an air gap o ...


3
Stefan Zikeli, Bernd Wolschner, Dieter Eichinger, Raimund Jurkovic, Heinrich Firgo: Process and arrangement for preparing a solution of cellulose. Lenzing Aktiengesellschaft, Brumbaugh Graves Donohue & Raymond, July 19, 1994: US05330567 (21 worldwide citation)

There is disclosed a process for preparing solutions of cellulose in aqueous tertiary amine oxides from a suspension of cellulose in an aqueous solution of the tertiary amine oxide by supplying heat at a reduced pressure. The suspension is transported over a heating surface, spread in layers or coat ...


4
Wolfram Kalt, Johann Manner, Heinrich Firgo: Moulding materials and spinning materials containing cellulose. Lenzing Aktiengesellschaft, Brumbaugh Graves Donohue & Raymond, October 21, 1997: US05679146 (20 worldwide citation)

Moulding material and spinning material respectively containing cellulose, an aqueous tertiary amine-oxide, a non-solvent and a stabiliser, characterised in that, one or more stabilisers are provided which altogether have a basic and antioxidant action with the proviso that the basic stabiliser is n ...


5
Korger Dietmar, Stephan Astegger, Dieter Eichinger, Heinrich Firgo: Method of removing amines. Lenzing Aktiengesellschaft, Brumbaugh Graves Donohue & Raymond, August 27, 1991: US05043075 (16 worldwide citation)

There is disclosed a method of removing amines from aqueous solutions thereof, in particular from waste waters obtained in cellulose processing. The aqueous amine solutions are contacted with a cation exchanger whose anchor groups consist of carboxyl groups, in order to charge the cation exchanger w ...


6
Dieter Eichinger, Raimund Jurkovic, Stephan Astegger, Heinrich Firgo, Peter Hinterholzer, Karin Weinzierl, Stefan Zikeli: Method of producing shaped cellulosic articles. Lenzing Aktiengesellschaft, Herbert Dubno, Jonathan Myers, June 1, 1993: US05216144 (16 worldwide citation)

Shaped cellulosic bodies and especially cellulosic fibers or filaments are produced by precipitating cellulose from a solution containing cellulose and NMMO. To allow elevated concentrations of NMMO in the precipitating bath without detriment to the properties of the fibers or filaments produced, th ...


7
Wolfram Kalt, Heinrich Firgo, Johann Manner, Eduard Mulleder, Bruno Mangeng, Arnold Nigsch, Franz Schwenninger, Christoph Schrempf: Process for the production of cellulose moulded bodies. Lenzing Aktiengesellschaft, Brumbaugh Graves Donohue & Raymond, May 13, 1997: US05628941 (11 worldwide citation)

The invention is concerned with a process for the production of cellulose moulded bodies. In this process, cellulose is first dissolved in an aqueous solution of a tertiary amine-oxide, in particular N-methylmorpholine-N-oxide (NMMO), to produce a mouldable cellulose solution. Second, the cellulose ...


8
Heinrich Firgo, Sigrid Seidl, Peter Bartsch, Berndt Koll, Eduard Mulleder: Cellulose fibre. Lenzing Atkiengesellschaft, Baker & Botts, August 18, 1998: US05795522 (10 worldwide citation)

This invention relates to a process for the production of a cellulose molded body according to the amine-oxide process, which results in a molded body having reduced and effectively controllable fibrillation properties.


9
Peter Hinterholzer, Stefan Zikeli, Heinrich Firgo, Bernd Wolschner, Dieter Eichinger, Johann Manner, Stephan Astegger, Karin Weinzierl: Cellulose solution in water and NMMO. Lenzing Aktiengesellschaft, Herbert Dubno, Jonathan Myers, February 23, 1993: US05189152 (10 worldwide citation)

A solution of cellulose in water and N-methylmorpholine-N-oxide (NMMO) containing 2 to 44% by weight cellulose is stabilized at 0.01 to 1%, preferably 0.1% H.sub.2 O.sub.2 and 0.01 to 2%, preferably 0.1% of an H.sub.2 O.sub.2 stabilizer, preferably oxalic acid or a salt thereof during formation of t ...


10
Heinrich Firgo, Dieter Eichinger, Markus Eibl: Process for the production of a cellulose moulded body. Lenzing Aktiengesellschaft, Brumbaugh Graves Donohue & Raymond, February 11, 1997: US05601767 (9 worldwide citation)

A process for the production of a cellulose moulded body, particularly cellulose fibres, characterized by the combination of the measures of