Lenzing Aktiengesellschaft

Lenzinc Aktiengesellschaft

Wolfram Kalt

Heinrich Firgo

Johann Manner

Franz Schwenninger

Bruno Mangeng

Christoph Schrempf

Dieter Eichinger

Eduard Mulleder

Arnold Nigsch

Friedrich Ecker

Michael Longin

Wilhelm Feilmair

Werner Richardt

Christian Hager

Johann M Anner

Wolfgang Helmut Schkorwaga

A device is disclosed to draw off or store viscous mass which is discharged from a process for example as a result of exothermal events. The device contains at least one unit which has one inlet for the viscous mass and one outlet and is at least partly filled with a non combustible liquid inert to the viscous mass. The unit can be in the form of a pipe or a receptacle. Preferably several units in the form of a pipe can be connected one with the other respectively with a unit in the form of a receptacle. The solution discharged can then be transported via the pipes to the receptacle.

Device for draining or storing viscous materials

The invention is concerned with a process for the production of a solution of N-methylmorpholine-N-oxide in water, characterized by the following steps:

Process for the regeneration of an aqueous process liquid of the

The invention is concerned with a process for the production of an aqueous amine-oxide solution used in the amine-oxide process for the production of a mouldable cellulose solution, wherein aqueous, amine-oxide containing solutions produced in said amine-oxide process particularly as precipitation baths are purified and concentrated, characterized in that a microbiocide agent is added to said aqueous, amine-oxide containing solutions before, during or after purification.

Process for the production of an aqueous solution of a tertiary

The invention is concerned with a process for transporting a solution of cellulose in an aqueous tertiary amine-oxide through a component wherein said cellulose solution has different flow rates in said component, characterized in that an outlet wherethrough part of said cellulose solution is discharged from said component is provided at a point within said component whereat said flow rate is relatively low. (FIG. 2)

Process for transporting a solution of cellulose in an aqueous tertiary

The invention is concerned with a process for the production of cellulose moulded bodies wherein a suspension of cellulose in an aqueous solution of a tertiary amine-oxide is transformed into a mouldable solution, said solution being extruded by means of a forming tool and conducted into a precipitation bath. The process is characterized in that at least part of the materials in devices and pipes for the transportation and processing of the solution, which material is in contact with the mouldable solution contains at a minimum of 90% up to a depth of at least 0,5 .mu.m, preferably more than 1 .mu.m, at least one element of the group consisting of titanium, zirconium, chromium and nickel in elementary form and/or in the form of compounds provided that the remaining of the material does not contain any of the elements of the group consisting of copper, molybdenum, tungsten or cobalt. By means of the use of certain elements and compounds according to the invention, it is possible to control the occurrence and the extent of exothermal degradation reactions in the cellulose solution.

Process for the production of cellulose moulded bodies

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 not phosphate. The moulding material and spinning material respectively according to the invention are thermally stabilised against a runaway of the decomposition reaction. The degradation of the cellulose and of the amine-oxide is also largely prevented.

Moulding materials and spinning materials containing cellulose

Process for the purification of aqueous solutions of amine-oxides

Stable moulding material and spinning material containing cellulose

Growing community of inventors

Lenzing, Austria

Wolfram Kalt