Gas separations with redox-active metal-organic frameworks

Patent metadata

Field	Value
Publication number	US-9675923-B2
Application number	US-201213593914-A
Country	US
Kind code	B2
Filing date	Aug 24, 2012
Priority date	Aug 25, 2011
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

Fe 2 (dobdc) has a metal-organic framework with a high density of coordinatively-unsaturated Fe II centers lining the pore surface. It can be effectively used to separate O 2 from N 2 and in a number of additional separation applications based on selective, reversible electron transfer reactions. In addition to being an effective O 2 separation material, it can be used for many other processes, including paraffin/olefin separation, nitric oxide/nitrous oxide separation, acetylene storage, and as an oxidation catalyst.

First claim

What is claimed:

1. A method of separating a mixture stream comprising a paraffin and an olefin comprising:
contacting the mixture stream with Fe 2 (dobdc)(dobdc=2,5-dioxido-1,4-benzenedicarboxylate); and
obtaining a first stream richer in the paraffin as compared to the mixture stream.

2. The method of claim 1 , wherein the paraffin is ethane and the olefin is ethene.

3. The method of claim 1 , wherein the paraffin is propane and the olefin is propene.

4. The method of claim 1 , wherein the paraffin in the obtained first stream has a purity greater than 99.5 percent.

5. The method of claim 1 , further comprising obtaining a second stream richer in the olefin as compared to the mixture stream.

6. The method of claim 1 , wherein the temperature of the mixture stream when contacting with Fe 2 (dobdc)(dobdc=2,5-dioxido-1,4-benzenedicarboxylate) is 318 to 353 K.

7. The method of claim 6 , wherein the pressure of the mixture stream when contacting with Fe 2 (dobdc)(dobdc=2,5-dioxido-1,4-benzenedicarboxylate) is equal to or less than 1 bar.

8. The method of claim 1 , wherein the temperature of the mixture stream when contacting with Fe 2 (dobdc)(dobdc=2,5-dioxido-1,4-benzenedicarboxylate) is 201 to 226 K.

9. The method of claim 5 , wherein the olefin in the second stream has a purity greater than 99 percent.

Assignees

• Long Jeffrey R
• Bloch Eric D
• Murray Leslie
• Univ California

Inventors

• Long Jeffrey R
• Bloch Eric D
• Murray Leslie

Classifications

• Y02P20/51

  Cross-Sectional Technologies · mapped topic

• B01D53/02 Primary

  by adsorption, e.g. preparative gas chromatography {(solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01)} · CPC title

• C07C9/04

  Methane (production by treatment of sewage C02F11/04; natural gas, synthetic natural gas C10L3/06) · CPC title

• Y02C20/10

  of nitrous oxide (N2O) · CPC title

• B01D2253/204

  Metal organic frameworks (MOF's) · CPC title