Zeolite-like metal-organic frameworks with ana topology

Patent metadata

Field	Value
Publication number	US-10759724-B2
Application number	US-201815952511-A
Country	US
Kind code	B2
Filing date	Apr 13, 2018
Priority date	Sep 11, 2014
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

Embodiments of the present disclosure describe a zeolite-like metal-organic framework composition comprising a metal-organic framework composition with ana topology characterized by the formula [MIII(4, 5-imidazole dicarboxylic acid)2X(solvent)a]n wherein MIII comprises a trivalent cation of a rare earth element, X comprises an alkali metal element or alkaline earth metal element, and solvent comprises a guest molecule occupying pores. Embodiments of the present disclosure describe a method of separating paraffins comprising contacting a zeolite-like metal-organic framework with ana topology with a flow of paraffins, and separating the paraffins by size.

First claim

What is claimed is:

1. A composition, comprising:
a metal-organic framework composition with ana topology characterized by the formula [M III (4, 5-imidazole dicarboxylic acid) 2 X(solvent) a ] n wherein M III comprises a trivalent cation of a rare earth element, X comprises one or more alkali metal elements or one or more alkaline earth metal elements, solvent comprises a guest molecule occupying pores, a is at least 1, and n is at least 1.

2. The composition of claim 1 , wherein M III includes one or more of any one of the following trivalent cations of a rare earth element: Ce 3+ , Dy 3+ , Er 3+ , Eu 3+ , Gd 3+ , Ho 3+ , La 3+ , Lu 3+ , Nd 3+ , Pr 3+ , Pm 3+ , Sm 3+ , Sc 3+ , Tb 3+ , Tm 3+ , Yb 3+ , or Y 3+ .

3. The composition of claim 1 , wherein X is lithium, sodium, potassium, rubidium, cesium, francium, beryllium, magnesium, calcium, strontium, barium, or radium.

4. The framework of claim 1 , wherein the metal-organic framework composition with ana topology is anionic.

5. The composition of claim 1 , wherein the pore sizes of the metal-organic framework composition with ana topology tunable to within a range of less than about 0.5 Å.

6. The composition of claim 1 , wherein the pore sizes of the metal-organic framework composition with ana topology are tuned to about 4.2 Å to 5.0 Å.

7. The composition of claim 1 , wherein the metal-organic framework composition with ana topology is one or more of a thin film membrane and a zeolite molecular sieve.

8. The composition of claim 1 , wherein the metal-organic framework composition with ana topology is an adsorbent for separating paraffins by size.

9. A method of separating paraffins, comprising:
contacting a metal-organic framework with ana topology with a flow of paraffins, and
separating the paraffins by size,
wherein the metal-organic framework with ana topology is characterized by the formula [M III (4, 5-imidazole dicarboxylic acid) 2 X(solvent) a ] n wherein M III comprises a trivalent cation of a rare earth element, X comprises one or more alkali metal elements or one or more alkaline earth metal elements, solvent comprises a guest molecule occupying pores, a is at least 1, and n is at least 1.

10. The method of claim 9 , wherein separating paraffins by size includes separating isoparaffins from paraffins.

11. The method of claim 9 , wherein separating paraffins by size includes separating linear paraffins from branched paraffins.

12. The method of claim 9 , wherein n-pentane is kinetically separated from isopentane.

13. The method of claim 9 , wherein separating paraffins by size includes separating one or more of linear paraffins and mono-branched paraffins from 2,2,4-trimethylpentane.

14. The method of claim 9 , wherein M III includes one or more of any one of the following trivalent cations of a rare earth element: Ce 3+ , Dy 3+ , Er 3+ , Eu 3+ , Gd 3+ , Ho 3+ , La 3+ , Lu 3+ , Nd 3+ , Pr 3+ , Pm 3+ , Sm 3+ , Sc 3+ , Tb 3+ , Tm 3+ , Yb 3+ , or Y 3+ .

15. The method of claim 9 , wherein X is lithium, sodium, potassium, rubidium, cesium, francium, beryllium, magnesium, calcium, strontium, barium, or radium.

16. The method of claim 9 , wherein paraffins with high cetane numbers are separated from paraffins with low cetane numbers.

17. The method of claim 9 , wherein paraffins with a kinetic diameter of greater than about 4.2 Å to 5.0 Å are separated from paraffins with a smaller kinetic diameter.

18. The method of claim 9 , wherein paraffins with high research octane numbers are separated from paraffins with low research octane numbers.

19. The method of claim 18 , wherein the paraffins with low research octane numbers include one or more of linear paraffins and mono-branched paraffins.

Assignees

• Univ King Abdullah Sci & Tech

Inventors

• Eddaoudi Mohamed
• Belmabkhout Youssef
• Mohideen Mohamed Infas Haja
• Adil Karim
• Bhatt Prashant M
• Shekhah Osama
• Chernikova Valeriya

Classifications

• Y02P20/52

  using catalysts, e.g. selective catalysts · CPC title

• B01D2257/702

  Hydrocarbons · CPC title

• B01D2256/24

  Hydrocarbons · CPC title

• B01D2253/204

  Metal organic frameworks (MOF's) · CPC title

• B01D53/02

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