Selective adsorption of gaseous alkenes into non-porous copper(I) complexes: controlling heat of adsorption and loading pressure

Patent metadata

Field	Value
Publication number	US-11517877-B2
Application number	US-202117355743-A
Country	US
Kind code	B2
Filing date	Jun 23, 2021
Priority date	Jun 23, 2020
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

Disclosed are air-stable small-molecule adsorbents trimeric [Cu—Br]3 and [Cu—H]3 that undergo a reversible solid-state molecular rearrangements to [Cu—Br.(alkene)]2 and [Cu—H.(alkene)]2 dimers. The reversible solid-state rearrangement allows one to break adsorbent design trade-offs and achieve low heat of adsorption while retaining high selectivity and uptake.

First claim

What is claimed is:

1. A composition comprising an alkene and a compound having Formula I:

wherein each X is, independent of the other, chosen from H and Br; and each Y is, independent of the other, chose from CF 3 , C 2 F 5 , C 3 F 7 , C 4 F 8 , F, Cl, Br, and I.

2. The composition of claim 1 , wherein the alkene is ethene, propene, 1-butene, or a mixture thereof.

3. The composition of claim 1 , wherein Y is CF 3 .

4. The composition of claim 1 , further comprising an alkane.

5. The composition of claim 1 , further comprising a complex having Formula II:

wherein each X is, independent of the other, chosen from H and Br; and each Y is, independent of the other, chosen from CF 3 , C 2 F 5 , C 3 F 7 , C 4 F 8 , F, Cl, Br, and I.

6. The composition of claim 5 , wherein Alkene is ethene, propene, or 1-butene.

7. A complex having Formula II:

wherein each X is, independent of the other, chosen from H and Br; and each Y is, independent of the other, chosen from CF 3 , C 2 F 5 , C 3 F 7 , C 4 F 8 , F, Cl, Br, and I.

8. The complex of claim 7 , wherein Alkene is ethene, propene, or 1-butene.

9. The complex of claim 7 , wherein Y is CF 3 .

10. A method of separating an alkene from a mixture comprising the alkene and an alkane, comprising: contacting the mixture with a compound having Formula I:

to form a complex having Formula II

wherein each X is, independent of the other, chosen from H and Br; and each Y is, independent of the other, chosen from CF 3 , C 2 F 5 , C 3 F 7 , C 4 F 8 , F, Cl, Br, and I.

11. The method of claim 10 , wherein Y is CF 3 .

12. The method of claim 10 , wherein the alkene is ethene, propene, 1-butene, or a mixture thereof.

13. The method of claim 10 , wherein the alkane is ethane, propane, butane, or a mixture thereof.

14. The method of claim 10 , wherein the mixture is contacted with the compound having Formula I at a pressure below a partial pressure of the alkene.

15. The method of claim 10 , wherein the mixture is contacted with the compound having Formula I at a temperature from 0° C. to 200° C.

16. The method of claim 10 , wherein the mixture is contacted with the compound having Formula I at a pressure from ambient pressure to 100 kPa.

17. The method of claim 10 , wherein the mixture is contacted with the compound having Formula I at a pressure from 100 kPa to 100,000 kPa.

18. The method of claim 10 , wherein the mixture is contacted with the compound having Formula I at a pressure from 600 kPa to 1000 kPa.

19. The method of claim 10 , further comprising reducing pressure to ambient pressure or below after forming the complex having Formula II, and collecting the alkene.

20. The method of claim 10 , further comprising increasing temperature after forming the complex having Formula II, and collecting the alkene.

21. The method of claim 10 , wherein the mixture is contacted with the compound having Formula I in the presence of a solvent.

Assignees

• Univ Texas
• Univ Of Canterbury

Inventors

• Dias Rasika
• Cowan Matthew Greig
• Parasar Devaborniny

Classifications

• C07C7/152

  by forming adducts or complexes · CPC title

• C07F1/08 Primary

  Copper compounds · CPC title

• B01J20/3242

  Layers with a functional group, e.g. an affinity material, a ligand, a reactant or a complexing group · CPC title

• B01J20/3433

  of sorbents or filter aids other than those covered by B01J20/3408 - B01J20/3425 · CPC title

• B01J20/3236

  containing metal, other than zeolites, e.g. oxides, hydroxides, sulphides or salts · CPC title