Food or edible material: processes – compositions – and products – Processes – Extraction utilizing liquid as extracting medium
Patent
1973-06-18
1976-06-29
Jones, Raymond N.
Food or edible material: processes, compositions, and products
Processes
Extraction utilizing liquid as extracting medium
426634, 2601235, 23267R, A23L 120
Patent
active
039669823
ABSTRACT:
There is described a process and apparatus for treating oleaginous seed materials, such as soybean flakes with an extraction solvent, which includes an extraction zone, a desolventizing zone, and a miscella treating zone. In the extraction zone, the oleaginous seed material is subjected to concurrent contact with a carbohydrate-selective extraction solvent in a plurality of extraction vessels arranged in countercurrent fluid relationship therebetween with the expression of treated solids being effected after each extraction. The expressed solids from the last extracting vessel are passed to a desolventizing zone wherein residual solvent is vaporized by the respective indirect and direct contact with a heat transfer medium, such as steam, to produce a protein concentrate having a concentration (moisture free basis) of proteinaceous matter of at least about 70% by weight (6.25 times the total nitrogen content by the Kjeldahl method).
The miscella is passed to a miscella treating zone which includes fractionating columns operating at different pressure levels in a multiple effect type of distillation system. The miscella is first introduced into a low pressure fractionating column and passed in indirect heat transfer relationship with the gaseous overhead from a second fractionating column to evaporate a portion of the extraction solvent. The bottoms from the low pressure fractionating column are then passed to the second fractionating column operating at a higher pressure and are passed in direct heat transfer relationship with steam and reboiled vapors to evaporate substantially all of the remaining portions of the extraction solvent with the liquid bottoms or whey being withdrawn for further processing.
REFERENCES:
patent: 2467402 (1949-04-01), Pascal
patent: 2585793 (1952-02-01), Kruse
patent: 2756668 (1956-07-01), Seed et al.
patent: 3207744 (1965-09-01), O'Hara et al.
patent: 3365440 (1968-01-01), Circle et al.
Baczewski Klemens C.
Becker Kenneth W.
Klein Donald J.
Dravo Corporation
Jones Raymond N.
Massung Esther L.
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