Process for the production of an aqueous solution of a tertiary amine-oxide
AssigneeLenzing Aktiengesellschaft
InventorsJohann Manner, Heinrich Firgo, Bruno Mangeng, Eduard Mulleder, Wolfram Kalt
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Abstract
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.
Claims12
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, comprising the steps of:
- providing a precipitation bath including an aqueous amine-oxide solution;
- purifying and concentrating the aqueous, amine-oxide containing solution produced in said amine-oxide process and adding a microbiocide agent to the aqueous, amine-oxide containing solution before purification.
A process for the production of cellulose moulded bodies according to the amine-oxide process, comprising the steps of:
- producing a cellulose suspension from an aqueous solution of an amine-oxide end shredded cellulose;
- forming a mouldable solution from said suspension;
- conveying said mouldable solution to a precipitation bath thereby forming cellulose moulded bodies and producing a spent precipitation bath;
- purifying said spent precipitation bath to regenerate an aqueous solution of said amine-oxide;
- and
- recycling said aqueous solution in said amine-oxide process;
- wherein at least one of said steps is carried out in the presence of a microbiocide agent.
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 comprising the steps of:
- providing a precipitation bath including an aqueous amine-oxide solution;
- purifying and concentrating the aqueous amine-oxide containing solution;
- and,
- adding a microbiocide agent to the aqueous amine-oxide containing solution during purification.
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 comprising the steps of:
- providing a precipitation bath including an aqueous amine-oxide solution;
- purifying and concentrating the aqueous amine-oxide containing solution;
- and
- adding a microbiocide agent to the aqueous amine-oxide containing solution after purification.
Dependencies are inferred from the claim text.