Biomass extracts with protein and nutritional value
View Patent ↗Biomass extracts with high protein and nutritional value and methods for making the same are disclosed. Such extracts may include cakes with low residual oil and high levels of desirable constituents and oils that require little to no downstream processing upon extraction from the biomass. Also includes methods of extracting desirable products from an oil bearing biomass.
1. A method of producing an organic defatted cake and an oil, the method comprising:
a. dehulling a whole bean or whole grain feedstock to provide an oil bearing biomass from which the hulls have been removed:
b. feeding the oil bearing biomass to a continuous screw press extractor;
c. compressing the biomass in the screw press extractor to form a cake plug that is essentially impermeable to fluids;
d. relieving the pressure on the biomass in the screw press extractor;
e. feeding an organic solvent to the screw press extractor and into the biomass;
f. compressing the biomass in the screw press extractor to extract oil and solvent from the biomass to create the organic defatted cake having a residual oil content of less than 6%;
g. separating the extracted oil and solvent from the defatted biomass; and
h. recovering the extracted oil, the oil having an average of less than 50 parts per million phosphorous.
2. The method of claim 1 , wherein the temperature within the extractor is maintained below 260° F.
3. The method of claim 1 , wherein the temperature within the extractor is maintained below 220° F.
4. The method of claim 1 , wherein the extracted oil has less than 35 parts per million phosphorous.
5. The method of claim 1 , wherein the extracted oil has less than 20 parts per million phosphorous.
6. An organic defatted biomass product having less than 6% residual oil and a PDI of greater than 60%, the defatted biomass product being produced by a process comprising:
a. feeding a raw biomass comprised of dehulled whole beans or dehulled whole grain or of germ to a compression zone of a screw press extraction unit;
b. compressing the raw biomass in the extraction unit to form a cake plug that is essentially impermeable to fluids;
c. relieving the pressure on the cake plug in the screw press extraction unit to make it permeable to fluids;
d. injecting an organic solvent selected from the group consisting of non-toxic alcohols and gases into the extraction unit to form a mixture of solvent, oil and biomass; and
e. compressing the mixture in the extraction unit to form a second cake plug and to push solvent and oil from the biomass, the second cake plug from which solvent and oil has been pushed being the organic defatted biomass product having a residual oil content of less than 6% and a PDI of greater than 60%; and wherein
the organic defatted biomass product is hexane free.
7. The method of claim 1 , wherein the feedstock is soybean.
8. The method of claim 1 , further comprising the step of further processing the dehulled feedstock to provide a germ fraction as the oil bearing biomass.
9. A method of producing an organic defatted cake and an oil, the method comprising:
a. providing a continuous screw press extractor for compression of a biomass and extraction of oil and solvent from the biomass;
b. feeding a dehulled oil bearing biomass to the continuous screw press extractor;
c. compressing the biomass in the screw press extractor to form a cake plug that is essentially impermeable to fluids;
d. relieving the pressure on the biomass in the screw press extractor;
e. feeding an organic solvent to the screw press extractor and into the biomass;
f. compressing the biomass in the screw press extractor to extract oil and solvent from the biomass to create the organic defatted cake wherein the organic defatted cake has a residual oil content of less than 6%, a PDI of greater than 60%;
g. separating the extracted oil and solvent from the defatted biomass; and
h. recovering the extracted oil, the oil having an average of less than 100 parts per million phosphorous.
10. A method of producing an organic defatted cake and oil, the method comprising:
a. feeding a raw dehulled biomass to a compression zone of a screw press extraction unit;
b. compressing the raw dehulled biomass in the screw press extraction unit to form a cake plug that is essentially impermeable to fluids;
c. relieving the pressure on the cake plug in the screw press extraction unit to make the cake plug permeable to fluids;
d. injecting organic solvent into the screw press extraction unit at a point where the pressure on the cake plug has been relieved to create a mixture of solvent and biomass;
e. compressing the mixture in the screw press extraction unit to extract the solvent and the oil from the biomass to form the organic defatted cake, the organic defatted cake having a residual oil content of less than 6% and a PDI of greater than 60%;
f. separating the extracted oil and solvent from the defatted cake; and
g. recovering the extracted oil, the oil having an average of less than 100 parts per million phosphorous.
11. The method of any one of claims 1 , 9 and 10 wherein the organic solvent is a gas or a non-toxic alcohol.
12. The method of any one of claims 1 , 9 and 10 wherein the organic solvent is carbon dioxide.