Abstract: A method for the preparation of lignin, characterized in that an acid is added to an alkaline alcoholic solution of lignin and the precipitated lignin is separated, and, optionally, from the filtrate alcohol is removed in order to get further lignin; as well as a method for the preparation of a concentrated alkaline, alcoholic solution of lignin by membrane filtration; the use of the lignin thus prepared; and the isolation of hydroxy cinnamic acids from the solution, from which the lignin has been separated.

Abstract: 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

Abstract: 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 C1-4 alcohol, 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.

Abstract: A process for obtaining resin or plastics using a lignocellulosic material by treating a lignocellulosic material with an aqueous extraction solution having a content of a C1-4-alcohol of from 70% v/v to 95% v/v at a pH-value of from 12 to 14, whereby a first aqueous solution of low-molecular lignin (LML) is obtained, which is converted into resin or plastics; and a method of obtaining LML and a method of concentrating LML, wherein the first aqueous solution of LML is used for the treatment of additional lignocellulosic material in order to obtain aqueous solutions in which the LML is enriched compared with the first aqueous solution.

Abstract: 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.

Abstract: A method for the preparation of lignin from lignocellulosic material by pulping with alcohol, in particular with a C1-4 alcohol, water and a base, in particular NaOH, at a temperature below 100° C., in particular from 40° C. to 90° C., in particular from 50° C. to 70° 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.

Abstract: A method for the preparation of lignin, characterized in that an acid is added to an alkaline alcoholic solution of lignin and the precipitated lignin is separated, and, optionally, from the filtrate alcohol is removed in order to get further lignin; as well as a method for the preparation of a concentrated alkaline, alcoholic solution of lignin by membrane filtration; the use of the lignin thus prepared; and the isolation of hydroxy cinnamic acids from the solution, from which the lignin has been separated.

Abstract: The invention relates to a method for the production of erythritol, in which erythrose is reduced to erythritol using a NADPH-specific enzyme, wherein the enzyme is an erythrose reductase which was isolated from the group of saprophytes selected from the strains of Hypocrea, Gibberella, Aspergillus and Penicillium. Hereby it is possible to produce erythritol in high yields.

Abstract: 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 C1-4-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.

Abstract: A method for the preparation of carbohydrate cleavage products, characterized by the combination of the measures that the lignocellulosic material is treated with an aqueous solution containing hydrogen peroxide, an alcohol, in particular a C1-4 alcohol or a phenol, and a base in order to oxidatively break down lignocellulose and to separate cleavage products from the material, and that the obtained material enriched with cellulose and hemicelluloses is treated with a carbohydrate-cleavage enzyme in order to prepare the carbohydrate cleavage products.