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Highly selective polynorbornene homopolymer membranes for natural gas upgrading

A technology of polynorbornene and norbornene, which is applied in the direction of climate sustainability, membrane, membrane technology, etc., and can solve problems such as low selectivity, performance decline, and permeability reduction

Active Publication Date: 2018-11-23
SAUDI ARABIAN OIL CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Glassy polymer membranes have been used to efficiently separate oxygen and nitrogen from air samples, and have also been used to separate butanol from other biofuels; however, these glassy polymer membranes can only achieve low hydrocarbon selectivities, so Inability to separate sufficiently for natural gas upgrade applications
In contrast, rubber-like polymers, such as polydimethylsiloxane (PDMS), are highly permeable but generally less selective
In addition, glassy polymer films tend to degrade due to aging
Aging is caused by the collapse of free volume, which often results in a decrease in permeability

Method used

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  • Highly selective polynorbornene homopolymer membranes for natural gas upgrading
  • Highly selective polynorbornene homopolymer membranes for natural gas upgrading
  • Highly selective polynorbornene homopolymer membranes for natural gas upgrading

Examples

Experimental program
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Effect test

example

[0059] Ring-opening metathesis polymerization of triethoxysilylnorbornene (ROMP-Si(OEt) 3 )synthesis:

[0060] To illustrate with reference to Reaction 1, in a glove box, 03.85 g of as received triethoxysilylnorbornene (0.05 molar (M), 1.51 mmol (mmol) )) and 29 mL of anhydrous deoxygenated toluene. In a separate vial, 2.5 milligrams (mg) of Grubbs first generation catalyst containing ruthenium (0.003 mmol) was dissolved in 2 mL of anhydrous toluene to create a stock catalyst solution. Finally, 1.0 mL of the catalyst solution was added to the stirred norbornene solution to initiate polymerization. After 24 hours, ethyl vinyl ether (0.431 mL, 4.51 mmol) was added to terminate the polymerization, and the solution was continued to stir. After an additional 24 hours, the solvent was removed under vacuum in the glove box until the sample volume was approximately 5 mL, at which point the sample became a viscous liquid. The viscous solution was precipitated dropwise into stirring...

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Abstract

Embodiments for a crosslinked alkoxysilyl polynorbornene homopolymer and methods of making crosslinked alkoxysilyl polynorbornene homopolymer are provided, where the method comprises polymerizing through addition polymerization or ring opening metathesis polymerization a norbornene monomer comprising an alkoxysilyl moiety in the presence of a catalyst to produce an alkoxysilyl modified polynorbornene homopolymer, and producing a crosslinked alkoxysilyl polynorbornene homopolymer through sol-gel initiated crosslinking of the alkoxysilyl modified polynorbornene homopolymer at ambient conditions,or acid-catalyzed conditions.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Patent Application 15 / 057,894, filed March 1, 2016, the entire contents of which are incorporated herein by reference. technical field [0003] Embodiments of the present disclosure relate generally to norbornene homopolymer films and their ability to separate natural gas molecules. Background technique [0004] Natural gas used by consumers consists almost entirely of methane. However, natural gas found at wellheads, while still mostly composed of methane, is by no means pure. Natural gas is usually isolated from three different sources: oil wells, gas wells and gas condensate wells, but regardless of the source of natural gas, it is usually present in admixture with other hydrocarbons; mainly ethane, propane, butane and pentane. Each of these hydrocarbons is of similar size and polarity. Pentane is a larger hydrocarbon that is relatively easy to separate, but separation is c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/22B01D71/26B01D71/70C08G61/08C08G77/06C08J5/22C08L45/00C08L65/00C08F132/08
CPCC08G61/08C08L45/00C08L65/00B01D2256/245C08G2261/11C08G2261/135C08G2261/144C08G2261/3324C08G2261/418C08G2261/76C08G2261/80B01D2257/7022Y02C20/20C08J3/24C08J2300/10C08J2365/00B01D53/228C08F132/08B01D71/70B01D67/00091C08G2261/374C08L101/10B01D2053/221B01D2323/30
Inventor 本杰明·J·桑德尔约翰·A·劳伦斯三世
Owner SAUDI ARABIAN OIL CO
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