US 4,889,921 A · Production of rapeseed protein materials

Abstract

A process of treating meal containing vegetable proteins is disclosed. This process includes the step of extracting the metal with a suitable aqueous solvent in which the vegetable proteins are soluble to obtain an extraction solution. The solubility of the dissolved protein in the extraction solution is then adjusted to precipitate at least some of the protein and therefore obtain a precipitated protein fraction and an unprecipitated protein fraction in solution. The precipitated protein fraction is then separated from the protein fraction in solution, and the unprecipitated protein fraction is separated from the undesirable components in the solution by membrane processing. Each of the protein fractions is then suitably dried to recover the proteins.

Claims25

Dependent claims

A process for treating meal containing vegetable proteins comprising:

(i) extracting said meal with an alkaline solvent for said vegetable proteins at a pH of from 10 to 12.5 to obtain an extraction solution containing a meal residue;
(ii) removing said meal residue;
(iii) adjusting the pH of said extraction solution by addition of an aqueous acid solution to a value of from 2 to 8 thereby precipitating at least some of said vegetable protein, to obtain an unprecipitated protein fraction in solution and a precipitated protein fraction;
(iv) separating the precipitated protein fraction from the protein fraction in solution;
and
(v) separating the unprecipitated protein fraction from the undesirable components in the solution by membrane filtration;
wherein said meal comprises one of defatted rapeseed and canola meal.

4 more elements

Dependencies are inferred from the claim text.

Production of rapeseed protein materials

Life of this patent

Production of rapeseed protein materials

Life of this patent

Abstract

Claims25