Title:
RECOVERY OF SELECTIVE EXTRACTION SOLVENT USING REGENERATED CELLULOSE UNDER REVERSE OSMOTIC CONDITION
Document Type and Number:
Japanese Patent JPS60130680
Kind Code:
A
Abstract:
Selective extraction solvents such as NMP, phenol or furfural employed for the extraction of specialty ails, i.e. lubricating, transformer and insulating oils, to remove undesirable aromatic components therefrom, is itself recovered from the extract stream and/or raffinate streams by preferential permeation through selective membranes of regenerated cellulose. The extract stream, because of its higher solvent content, is the preferred stream for solvent recovery treatment by the reverse osmosis membrane permeation technique. Solvent recovery employing membrane permeation exhibits the advantage of not being energy intensive as is distillation or stripping. The solvent is recovered at a high enough flux rate and at a high enough level of purity to be introduced back into the solvent extraction process optionally at some point in the process wherein the composition of the recovered solvent approximately matches the composition of the solvent present in the process at the point of introduction.
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Inventors:
JIYON EI TOMUPUSON
Application Number:
JP16148584A
Publication Date:
July 12, 1985
Filing Date:
July 31, 1984
Export Citation:
Assignee:
EXXON RESEARCH ENGINEERING CO
International Classes:
B01D61/02; C07C11/00; C10G21/28; C10G31/11; (IPC1-7): C10G21/28; C10G31/11
Attorney, Agent or Firm:
Motohiro Kurauchi