Gas Separation Using Organic-Vapor-Resistent Membranes In Conjunctin With Organic-Vapor-Selective Membranes

Patent · Tue Jun 03 00:00:00 EDT 2003

OSTI ID:879760

Baker, Richard W ^[1]; Pinnau, Ingo ^[1]; He, Zhenjie ^[2]; Da Costa, Andre R ^[3]; Daniels, Ramin ^[4]; Amo, Karl D ^[5]; Wijmans, Johannes G ^[3]

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1. Palo Alto, CA
2. Fremont, CA
3. Menlo Park, CA
4. San Jose, CA
5. Mountain View, CA

A process for treating a gas mixture containing at least an organic compound gas or vapor and a second gas, such as natural gas, refinery off-gas or air. The process uses two sequential membrane separation steps, one using membrane selective for the organic compound over the second gas, the other selective for the second gas over the organic vapor. The second-gas-selective membranes use a selective layer made from a polymer having repeating units of a fluorinated polymer, and demonstrate good resistance to plasticization by the organic components in the gas mixture under treatment, and good recovery after exposure to liquid aromatic hydrocarbons. The membrane steps can be combined in either order.

• Research Organization: MEMBRANE TECHNOLOGY & RES INC
• DOE Contract Number: FG03-97ER82429
• Assignee: Membrane Technology and Research, Inc. (Menlo Park, CA)
• Patent Number(s): US 6572679
• Application Number: 10/105861
• OSTI ID: 879760
• Country of Publication: United States
• Language: English