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US 11,597,779 B2Granted
Methods for producing a viscose dope from microbial cellulose
AssigneeNanollose Limited
InventorsMadian Mohamad Jinzarli, Gary Andrew Cass, John Moursounidis, Wayne Morris Best
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Abstract
A method for producing a microbial cellulose pulp for the production of viscose dope, the method comprising the step of: exposing a microbial cellulose to a volume of water to form the microbial cellulose pulp for the production of viscose dope, wherein the cellulose concentration in the microbial cellulose pulp is less than 0.040 g of cellulose per mL of pulp.
Claims8
A method for producing a viscose dope, the method comprising steps of:
- exposing a microbial cellulose to a volume of water to form a microbial cellulose pulp, wherein the cellulose concentration in the microbial cellulose pulp is less than 0.040 g of cellulose per mL of pulp;
- homogenising the microbial cellulose pulp;
- exposing the microbial cellulose pulp to a quantity of sodium hydroxide solution to produce a mercerised microbial cellulose pulp, wherein the cellulose concentration in the mixture of microbial cellulose pulp and sodium hydroxide solution is less than 0.035 g of cellulose per mL of mixture;
- treating the mercerised microbial cellulose pulp with carbon disulphide to produce a microbial cellulose xanthate;
- and
- contacting the microbial cellulose xanthate with an aqueous solution of sodium hydroxide to produce a microbial cellulose viscose dope.
3 more elements
A method for the production of viscose rayon fibres, the method comprising:
- exposing a microbial cellulose to a volume of water to form a microbial cellulose pulp, wherein the cellulose concentration in the microbial cellulose pulp is less than 0.040 g of cellulose per mL of pulp;
- homogenising the microbial cellulose pulp such that the particle size distribution of the particles of cellulose in the pulp has a D90 of less than 1700 μm, a D50 of less than 1200 μm and a D10 of less than 500 μm;
- exposing the microbial cellulose pulp to a quantity of sodium hydroxide solution to produce a mercerised microbial cellulose pulp, wherein the cellulose concentration in the mixture of microbial cellulose pulp and sodium hydroxide solution is less than 0.035 g of cellulose per mL of mixture;
- treating the mercerised microbial cellulose pulp with carbon disulphide to produce a microbial cellulose xanthate;
- and
- contacting the microbial cellulose xanthate with an aqueous solution of sodium hydroxide to produce a microbial cellulose viscose dope;
- and
- regenerating viscose rayon fibres from the microbial cellulose viscose dope.
5 more elements
A method for the production of a viscose sheet, the method comprising:
- exposing a microbial cellulose to a volume of water to form a microbial cellulose pulp, wherein the cellulose concentration in the microbial cellulose pulp is less than 0.040 g of cellulose per mL of pulp;
- homogenising the microbial cellulose pulp such that the particle size distribution of the particles of cellulose in the pulp has a D90 of less than 1700 μm, a D50 of less than 1200 μm and a D10 of less than 500 μm;
- exposing the microbial cellulose pulp to a quantity of sodium hydroxide solution to produce a mercerised microbial cellulose pulp, wherein the cellulose concentration in the mixture of microbial cellulose pulp and sodium hydroxide solution is less than 0.035 g of cellulose per mL of mixture;
- treating the mercerised microbial cellulose pulp with carbon disulphide to produce a microbial cellulose xanthate;
- and
- contacting the microbial cellulose xanthate with an aqueous solution of sodium hydroxide to produce a microbial cellulose viscose dope;
- and
- regenerating a sheet of viscose from the microbial cellulose viscose dope.
5 more elements
Dependencies are inferred from the claim text.