Membrane process for treating a mixture containing dewaxed oil and dewaxing solvent
AssigneeTexaco Inc.
InventorMordechai Pasternak
Life of this patent
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Abstract
Charge containing dewaxed oil and dewaxing solvent (typically methyl ethyl ketone and toluene) is treated to separate dewaxing solvent by use of a separating elastomer membrane barrier of a polysiloxane which has been cross-linked as with toluene diisocyanate, adipoyl dichloride, a dialkoxy silane, or a diacetoxy silane.
Claims11
An elastomer membrane, which comprises a non-porous elastomer membrane layer of a polysiloxane which has been cross-linked with, as cross-linking agent, a polyisocyanate, (ii) a poly(carbonyl chloride), or (iii) a silane R.sub.4-a Si(A).sub.a wherein A is --OH, --NH.sub.2, --OR, or --OOCR, a is 2, 3, or 4, and R is hydrogen or an alkyl, aralkyl, cycloalkyl, aryl, or alkaryl group, in proportions sufficient for providing properties enabling effective separation of dewaxing solvent and dewaxed oil.
Dependencies are inferred from the claim text.