Annikki Gmbh

Fritz Egger Gmbh & Co. Og

Thomas Ters

Ortwin Ertl

Kurt Messner

Karin Fackler

Anton Friedl

Felix Weinwurm

Ewald Srebotnik

Abdel Halim Fuqaha

Florian Zikeli

A method for working up an aqueous, alkaline-alcoholic and lignin containing solution via nanofiltration, wherein a permeate and a retentate are obtained, which permeate is an aqueous, lignin-starved solution and which retentate is an aqueous lignin-enriched solution.

Method for working up an aqueous lignin containing solution

A method for the preparation of lignin from lignocellulosic material by pulping with alcohol, in particular with a Calcohol, water and a base, in particular NaOH, at a temperature below 100&#xb0; C., in particular from 40&#xb0; C. to 90&#xb0; C., in particular from 50&#xb0; C. to 70&#xb0; C., characterized in that 3 to 12 parts of base, in particular 4 to 10 parts of base, in particular preferable 5 to 8 parts of base, are used per 100 parts of the dry lignocellulosic material to be pulped.

Preparation of lignin

A method for producing lignin derivatives from technical lignins by treatment with proteolytic enzymes (proteases), characterized in that the proteolytic treatment of the technical lignins significantly reduces the molar mass thereof.

Method for producing lignin derivatives

A method of obtaining an aqueous solution of an alkali acetate from lignocellulose, wherein lignocellulose is treated with a first aqueous extraction solution having a pH value in the range of 12 to 14 and a content of a Calcohol, in particular ethanol or isopropanol, in the range of 40% to 90%, in particular of from 75% to 85%, whereby a first aqueous solution of an alkali acetate is obtained, and wherein said first solution of an alkali acetate is used to treat additional lignocellulose in order to enrich additional acetate in said first solution.

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Vienna, Austria

Thomas Ters