Annikki Gmbh

Other

Lignocell Holz-biotechnologie Gesellschaft M.b.h.

Kurt Messner

Ortwin Ertl

Karin Fackler

Thomas Ters

Takashi Watanabe

Anton Friedl

Ewald Srebotnik

Vinzenz Fleck

Bernhard Rosner

Chularat Krongtaew

Alan Bruce

Karin Koller

Abdel Halim Fuqaha

Florian Zikeli

A process for the production of carbohydrate cleavage products, characterized by a combination of the measures that a lignocellulosic material is treated with an aqueous solution containing an alcohol, in particular a C-alcohol or a phenol, and having a pH-value of between 11.0 and 14.0 in order to cleave lignocellulose and separate cleavage products from the material, whereby a material enriched with cellulose and hemicellulose is obtained, and the obtained material enriched with cellulose and hemicellulose is treated with at least one carbohydrate-cleaving enzyme in order to obtain the carbohydrate cleavage products.

Process for the production of carbohydrate cleavage products from a lingnocellulosic material

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.

Method of obtaining acetate from lignocellulose specification identification

The object of the invention is a method for improving the impregnability of refractory wood species by pretreatment with fungi of the genera Trichoderma o Gliocladium or with weakly wood-degraging fungi. The pretreatment comprises a thermal treatment of the wood, the addition of a nutrient medium as well as an incubation phase to promote fungal growth. The incubation phase is stopped when the desired depth of penetration of the fungus is reached. The wood is subsequently impregnated with a wood impregnating agent. The typical result of the fungal pretreatment is an incarease in the depth of penetration of the impregnating agent to a depth of penetration of 5 mm to 30 mm required depending on the intended use.

Processing for improving the impregnability of wood by pretreatment with fungi

A process for depolymerizing and/or chemically modifying lignin or lignin-like compounds in which a solution of copper and peroxide acts on lignin and/or lignin-like substance at a temperature of less than 100&deg; C., characterized in that the solution is an aqueous solution containing copper or a copper complex, a coordination compound and peroxide and wherein the concentration of the copper or copper complex is between 0.001% and 5%, and wherein the concentration of the coordination compound is lower than 20% and wherein the concentration of peroxide is between 0.01% and 20%.

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Vienna, Austria

Kurt Messner