Oilseed processing
Crushed and de-fatted oilseed is extracted with water at neutral, mildly basic or mildly acidic pH; and is filtered. The filter media allows passage of small fragments of solid cell meat into the filtrate. The filtrate is treated with a base to increase pH to over pH 9, and solids are separated out. Protein is separated from other constituents of the liquid and concentrated, for example by heat-induced or isoelectric precipitation and/or ultrafiltration. The remaining liquid is rich in sugars. The process results in one or more protein products suited for human or animal food ingredients or for production of cosmetics, a sugar rich product suitable for fermentation or use as a feed ingredient, and a fiber-protein animal feed ingredient.
1. A new composition of matter, being a product made from defatted canola flake and comprising at least 50% protein by weight of dry matter, less than 1% phytate by weight of dry matter and having a Protein Dispersibility Index of less than 5%.
2. A new composition of matter as claimed in claim 1 in which the product comprises at least 80% protein by weight of dry matter.
3. A new composition of matter, being a product made from defatted canola flake and comprising at least 50% protein by weight of dry matter, less than 1% phytate by weight of dry matter and having a Protein Dispersibility Index of greater than 40%.
4. A new composition of matter, being a product made from defatted canola flake and comprising from about 50% to about 75% protein by weight of dry matter, less than 1% phytate by weight of dry matter, and having a Protein Dispersibility Index of greater than 40%.
5. A new composition of matter as claimed in claim 4 , having about 75% protein by weight of dry matter.