Abstract: A method for obtaining an oil fraction and a protein fraction from a vegetable starting substance comprises the steps of: extracting the starting substance which has been reduced in size with alcohol, and separating an alcohol liquid phase from the extracted starting substance; processing the alcohol liquid phase to obtain the oil fraction; avoiding drying of the alcohol wet extracted starting substance directly after the alcohol-extraction; transferring the still alcohol wet extracted starting substance into an aqueous suspension to reduce the alcohol content of the extracted starting substance below 5%; and processing the aqueous suspension to obtain the protein fraction.

Abstract: The invention relates to a method for obtaining a protein isolate and a fibre fraction from a parent substance containing fibres and protein.

Abstract: For preparing an albumin isolate from a substance containing albumin, the substance is first ground to a flour. The flour is then suspended in an aqueous solution. The albumin is extracted from the flour into the solution by an at least two stage extraction process using at least one protease, at a pH greater than 8 and at a temperature between 30 and 60° C. In the first stage the flour is treated at a lower protease to albumin weight ratio, at a lower pH and at a higher temperature than in the second stage. After the first stage, a first upper flow and a fraction containing the flour are separated, and the albumin is precipitated from said upper flow. The fraction containing the flour is subjected to the second extraction stage. After that, a second upper flow is separated and fed back to the first stage.

Abstract: In the method described, a protein-containing substance is first taken up in an alkaline solvent to give a solution. Insoluble constituents of the substance are separated off, the solution is neutralized and desalinated, and then the proteins contained in the solution are concentrated. The solubilization or disintegration of the protein-containing substance is carried out at room temperature using homogenization equipment. The heat dissipated into the protein-containing substance during homogenization is simultaneously removed. The pH of the alkaline solvent during the decomposition is over 11.5 and/or decomposition is carried out in the presence of a detergent, in particular sodium dodecylsulfate (SDS).

Abstract: In a process for preparing proteins from a protein-containing substance, the substance is dispersed in an alkaline solvent with a pH of over 11.5 and at a temperature of under 30.degree. C. The proteins in the substance are thus dissolved. The resulting solution is then neutralized and the proteins in it are concentrated. To improve the profitability of the process in large-scale manufacture, the protein-containing substance is treated with a protease before dispersion in the alkaline solvent.