High permeability membrane operated at elevated temperature...

Details High permeability membrane operated at elevated temperature... High permeability membrane operated at elevated temperature...

2008-05-07

2011-12-27

Greene, Jason M (Department: 1776)

Gas separation: processes

Selective diffusion of gases

Selective diffusion of gases through substantially solid...

C096S004000, C096S008000, C096S009000, C096S011000, C096S013000, C096S014000

Reexamination Certificate

active

08083834

ABSTRACT:
The present invention discloses a new process of treating natural gas using high gas permeability polybenzoxazole polymer membranes operated at high temperatures that can provide sufficient dew point margin for the product gas. The high gas permeability polybenzoxazole polymer membranes can be used for a single stage membrane system or for the first stage membrane in a two stage membrane system for natural gas upgrading. Simulation study has demonstrated that a costly membrane pretreatment system such as a MemGuard™ system will not be required in the present new process. The new process can achieve significant capital cost saving and reduce the existing membrane footprint greater than 50%.

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Park, Ho Bum et al., “Polymers with Cavities Tuned for Fast Selective Trnasport of Small Molecules and Ions”, Science, vol. 318, pp. 254-258, 2007.
Tullos, Gordon L. et al., “Thermal Conversion of Hydroxy-Containing Imides to Benzoaxoles: Polymer and Model Compound Study”, Macromolecules, vol. 32, pp. 3598-3612, 1999.
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Tullos et al., Macromolecules 1999, 32, 3598-3612.

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