Title: Membrane separation of ionic liquid solutions

Abstract

A membrane separation process using a highly fluorinated polymer membrane that selectively permeates water of an aqueous ionic liquid solution to provide dry ionic liquid. Preferably the polymer is a polymer that includes polymerized perfluoro-2,2-dimethyl-1,3-dioxole (PDD). The process is also capable of removing small molecular compounds such as organic solvents that can be present in the solution. This membrane separation process is suitable for drying the aqueous ionic liquid byproduct from precipitating solutions of biomass dissolved in ionic liquid, and is thus instrumental to providing usable lignocellulosic products for energy consumption and other industrial uses in an environmentally benign manner.

Inventors:

Campos, Daniel; Feiring, Andrew Edward; Majumdar, Sudipto; Nemser, Stuart

Issue Date:

2015-09-01

Research Org.:

CMS Technologies Holdings, Inc., Newport, DE (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1213526

Patent Number(s):

9120834

Application Number:

14/527,732

Assignee:

CMS Technologies Holdings, Inc. (Newport, DE)

Patent Classifications (CPCs):

C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07F - ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM

C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07C - ACYCLIC OR CARBOCYCLIC COMPOUNDS

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C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07F - ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM

C07F9/5407 - {Acyclic saturated phosphonium compounds}

C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07C - ACYCLIC OR CARBOCYCLIC COMPOUNDS

C07C303/44 - Separation
C07C211/63 - having quaternised nitrogen atoms bound to acyclic carbon atoms

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B01D71/32 - containing fluorine atoms

C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07C - ACYCLIC OR CARBOCYCLIC COMPOUNDS

C07C261/04 - Cyanamides

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B01D71/80 - Block polymers

C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07C - ACYCLIC OR CARBOCYCLIC COMPOUNDS

C07C309/30 - of six-membered aromatic rings substituted by alkyl groups

C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07D - HETEROCYCLIC COMPOUNDS

C07D213/18 - Salts thereof

C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07C - ACYCLIC OR CARBOCYCLIC COMPOUNDS

C07C309/04 - containing only one sulfo group

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B01D63/02 - Hollow fibre modules

C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07C - ACYCLIC OR CARBOCYCLIC COMPOUNDS

C07C213/10 - Separation
C07C311/48 - having nitrogen atoms of sulfonamide groups further bound to another hetero atom
C07C217/08 - the oxygen atom of the etherified hydroxy group being further bound to an acyclic carbon atom
C07C209/86 - Separation
C07C309/06 - containing halogen atoms, or nitro or nitroso groups bound to the carbon skeleton

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B01D69/12 - Composite membranes
B01D61/362 - {Pervaporation}
B01D71/52 - Polyethers

C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07D - HETEROCYCLIC COMPOUNDS

C07D233/58 - with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, attached to ring nitrogen atoms
C07D207/06 - with radicals, containing only hydrogen and carbon atoms, attached to ring carbon atoms

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B01D71/36 - Polytetrafluoroethene

C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07C - ACYCLIC OR CARBOCYCLIC COMPOUNDS

C07C305/06 - Hydrogenosulfates

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DOE Contract Number:  

SC0011293

Resource Type:

Patent

Resource Relation:

Patent File Date: 2014 Oct 29

Country of Publication:

United States

Language:

English

Subject:

09 BIOMASS FUELS