Process for oilseed extraction with an isopropanol-based solvent

Details Process for oilseed extraction with an isopropanol-based solvent Process for oilseed extraction with an isopropanol-based solvent

1980-12-15

1981-11-03

Niebling, John F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

A23J 114

Patent

active

042985404

ABSTRACT:
A simplified, energy efficient process for regulating the composition of recycle solvent obtained by the phase separation of the extract of oilseed extraction with an isopropanol-based solvent. In the extraction of oilseeds with such a solvent, there is obtained, by cooling of the extract, a solvent-rich liquid phase. The invention provides for regulation of the composition of this phase for purposes of solvent recycle by a process which comprises steps for dividing the phase into a first fraction (between about 60 and 95 percent) and a second fraction (between about 5 and 40 percent), directly recycling the first fraction as solvent for further extraction, distilling the second fraction to recover an overhead vapor-consisting essentially of a constant boiling mixture of isopropyl alcohol and water and a bottoms liquid, and condensing and recycling said overhead as solvent for further extraction. In combination, the first fraction and overhead product solvent recycle streams have a very desirable composition of several extraction system components.

REFERENCES:
W. D. Harris, et al. "Isopropanol as a Solvent for Extraction of Cottonseed Oil", J. Am. Oil Chem. Soc., vol. 24, pp. 370-375 (Nov. 1947).
Ibid, vol. 26, pp. 719-723 (Dec. 1949).
Ibid, vol. 27, pp. 273-275 (Jul. 1950).

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