Acid tolerant polymeric membrane and process for the...

Liquid purification or separation – Filter – Material

Reexamination Certificate

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C210S500270, C210S651000, C210S652000, C210S653000, C210S654000

Reexamination Certificate

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07997426

ABSTRACT:
A multi-layer membrane structure including a crosslinked polymeric membrane, such as a crosslinked polyvinyl sulfate membrane or a crosslinked copolymer polyvinyl sulfate and polyvinyl alcohol membrane, is provided. The membrane structure is suitable for use in an acid environment, and is suitable for recovering acid from a feed mixture comprising acid, hydrocarbons and water.

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