Method of dehydration, dehydrating apparatus, and membrane...

Gas separation: processes – Selective diffusion of gases – Selective diffusion of gases through substantially solid...

Reexamination Certificate

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C096S004000, C096S007000, C096S010000, C096S011000, C210S640000, C210S500210, C210S500220, C055S523000, C422S212000, C422S222000

Reexamination Certificate

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07819944

ABSTRACT:
A dehydration method by which water is selectively separated from a water-containing mixture31with a separation membrane. The separation membrane is a DDR type zeolite membrane2. The dehydration method includes bringing the mixture31into contact with one side of the DDR type zeolite membrane2and causing a pressure difference between that side of the DDR type zeolite membrane2which is in contact with the mixture and the other side of the DDR type zeolite membrane2to thereby cause the water to selectively permeate and separate out. By the dehydration method, water can be selectively separated from a water-containing mixture without the need of a high energy cost. The separation membrane has excellent acid resistance.

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