A hollow fiber carbon molecular sieve membrane and preparation and use thereof

A fiber carbon and molecular sieve technology, which can be used in hollow objects, other household appliances, membranes, etc., and can solve the problems of high capital expenditure and large amount of energy.

Active Publication Date: 2014-12-31
DOW GLOBAL TECH LLC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of cryogenic distillation on an industrial scale is that it requires a large amount of energy and considerable capital outlay

Method used

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  • A hollow fiber carbon molecular sieve membrane and preparation and use thereof
  • A hollow fiber carbon molecular sieve membrane and preparation and use thereof
  • A hollow fiber carbon molecular sieve membrane and preparation and use thereof

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Embodiment Construction

[0023] In some embodiments, the above-described method for effecting the separation of an alkene or at least two alkene from a mixture comprising the one or more alkene and its corresponding alkane is adapted to be suitable for the treatment of the following gaseous mixture, The mixture also comprises at least one additional gaseous component selected from the group consisting of acetylene, hydrogen, propadiene, and methacryne, and said conditions are sufficient to allow at least a portion of said additional gaseous component and at least a portion of said one or Various alkenes pass through the screen while blocking at least a portion of the corresponding alkanes from passing through the screen. A preferred variant of said modified method comprises the additional step wherein the gas passing through said sieve is subjected to a second separation using either the same hollow fiber carbon molecular sieve prepared as described above or a second hollow fiber carbon molecular sieve...

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Abstract

A hollow fiber carbon molecular sieve membrane, a process for preparing the hollow fiber carbon molecular sieve membrane, and a process for effecting separation of an olefin from a gaseous mixture that comprises the olefin in admixture with its corresponding paraffin and optionally one or more gaseous components selected from hydrogen, an olefin other than the olefin and a paraffin other than the corresponding paraffin. The process and membrane may also be used to effect separation of the olefin(s) from remaining feedstream components subsequent to an olefin-paraffin separation.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application 61 / 640,756, filed May 1, 2012. technical field [0003] This application relates generally to carbon molecular sieve membranes, and in particular to hollow fiber carbon molecular sieve membranes, their preparation and their use in achieving the separation between alkenes and alkanes, in particular two or more alkenes Separated from a feed stream comprising the two alkenes and their corresponding (having the same number of carbon atoms) alkanes (eg ethylene as the alkenes and ethane as its corresponding alkanes). The feed stream may contain one or more other gaseous components such as hydrogen, carbon monoxide, carbon dioxide, methane, acetylene, methylacetylene, propadiene, acetaldehyde, butane, 1,3-butadiene, oxygen, nitrogen and helium. The same carbon molecular sieve membrane can be used for a second separation to separate alkenes from other feed stream ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/22B01D67/00B01D69/08B01D71/02B01D71/42
CPCB01D53/228B01D67/0067B01D67/0088B01D67/0097B01D69/08B01D69/087B01D71/021B01D71/42B01D2323/08B01D2323/22B29C48/022B01D2325/20B29D22/00B29K2023/00B29K2091/00
Inventor W·J·克洛斯L·许M·K·布雷登M·V·马丁内斯B·A·斯蒂尔斯
Owner DOW GLOBAL TECH LLC
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