Supercharge Your Innovation With Domain-Expert AI Agents!

Olefin selective membrane comprising an ionic liquid and a complexing agent

An ionic liquid, olefin technology, applied in membrane technology, separation method, gas treatment, etc., can solve the problems of harmful diaphragm performance, reducing olefin/paraffin selectivity, etc.

Inactive Publication Date: 2012-07-11
DOW GLOBAL TECH LLC
View PDF1 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although such highly adsorbed species may indicate good pure gas selectivity in mixed gas separations, these membranes tend to plasticize due to the high concentration of olefins in the membrane
Such plasticization reduces olefin / paraffin selectivity in mixed gas systems, which is detrimental to diaphragm performance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Olefin selective membrane comprising an ionic liquid and a complexing agent
  • Olefin selective membrane comprising an ionic liquid and a complexing agent
  • Olefin selective membrane comprising an ionic liquid and a complexing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 and comparative example 1

[0044] Synthetic choline chloride-urea ionic liquid (embodiment 1)

[0045] A certain amount of pure (99 wt%) choline chloride was added to the flask. An amount of pure (99 wt%) urea was also added to the flask such that the molar ratio of choline chloride to urea was 1:2. The mixture was stirred at 250-500 revolutions per minute (rpm) at 80°C until a homogeneous liquid formed (this was after about 1 hour). A quantity of silver chloride (AgCl) is added and dissolved to the ionic liquid until a point of saturation is approached or reached. This composition is hereinafter referred to as ChCl:U2AgCl.

[0046] Synthesis of 1-butyl-3-methylimidazole Two (trifluoromethane) sulfonamide ionic liquid (comparative example 1)

[0047] A certain amount of ionic liquid 1-butyl-3-methylimidazole Chloride (more than 95 wt%) was added to a 1-neck round bottom flask on a stir plate. Deionized water was added to the ionic liquid (5:1 weight / weight (w / w)) to dissolve the ionic liquid the...

preparation Embodiment 1 and comparative example 1

[0049] Prepare the diaphragm of Example 1 and Comparative Example 1

[0050] 0.5 to 2 g of Example 1 ionic liquid (comprising silver chloride as metal salt favoring olefins) was placed on a glass fiber sample supported by wax paper, and a similar amount of Comparative Example 1 ionic liquid was placed on another Fiberglass samples supported on waxed paper. Each sample was loaded into a permeation cell, and each permeation cell was secured into a pure gas permeation system. Osmotic systems are constant volume / variable pressure systems routinely used in the art. Both samples were exposed to vacuum at 70°C for at least 16 hours prior to testing.

[0051] Test matrix olefin adsorption properties

[0052] Samples of each septum matrix (5 ml each) were placed in vials in a parallel pressure reactor (PPR). The samples were exposed to 200 psi (1379 kPa) ethylene at 30°C. The pressure of ethylene was maintained at 200 psi (1379 kPa) by the PPR for the duration of each test. The a...

Embodiment 2-3 and comparative example 2-7

[0058] Using the methods of Example 1 and Comparative Example 1 respectively, two additional example compositions (Example 2-3) and six comparative compositions (Comparative Examples 2-7) were used to prepare separators, the composition of which is shown in Table 2.

[0059] Table 2

[0060]

[0061] Key: ChCl is Choline Chloride

[0062] U is urea

[0063] Gly is glycerin

[0064] EG is ethylene glycol

[0065] * 2 represents stoichiometry, ie, 2 moles of urea, glycerol, or EG per mole of choline chloride.

[0066] BMIM[AOT] is 1-butyl-3-methylimidazole Dioctyl sulfosuccinate

[0067] BMIM[Tf2N] is 1-butyl-3-methylimidazole Bis(trifluoromethane)sulfonimide

[0068] BMIM[BF4] is 1-butyl-3-methylimidazole Tetrafluoroborate

[0069] It should be noted that although Comparative Examples 2-4 meet the adsorption requirements for the ionic liquids of the present invention operating at 30 °C membrane, they do not contain metal salts that can contribute to olefins, whe...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention is a membrane used for separating olefins from paraffins in a mixture thereof, comprising as a matrix an ionic liquid having an olefin sorption capability defined as having a Henry's Law Constant for ethylene that is greater than 130 bar (13000 kPa) at a selected membrane operation temperature, the matrix containing at least one metal salt capable of facilitating an olefin. The membrane facilitates the transportation of olefins and discourages Fickian diffusion and following plasticization.

Description

[0001] Cross References to Related Applications [0002] This application is a non-provisional application claiming priority to U.S. Provisional Patent Application 61 / 245,788, entitled "OLEFIN SELECTIVE MEMBRANE COMPRISING AN Ionic Liquid AND A COMPLEXING AGENT," filed September 25, 2009, the teachings of which are incorporated herein by reference , the following is the same as copying the full text. technical field [0003] The present invention relates to the field of olefin selective membranes. More particularly, the present invention relates to olefin-selective membranes comprising ionic liquids with low olefin adsorption capacity to increase the separation effect. Background technique [0004] Separation of olefins from mixtures containing paraffins is an important process in the production of many chemical products including, but not limited to, polyethylene, polypropylene, and other polymers based on olefinic monomers. Unfortunately, olefin / paraffin separation is bo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/38B01D69/14B01D61/36B01D53/22
CPCB01D53/228B01D69/142B01D2256/24B01D61/38
Inventor J.T.戈克S.D.费斯特S.T.马图西P.N.尼基亚斯
Owner DOW GLOBAL TECH LLC
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com