Zeolitic imidazolate framework materials, their synthesis and use

Patent metadata

Field	Value
Publication number	US-10696558-B2
Application number	US-201815924597-A
Country	US
Kind code	B2
Filing date	Mar 19, 2018
Priority date	Mar 21, 2017
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

A novel zeolitic imidazolate framework material comprises a partially saturated benzimidazole or a partially saturated substituted benzimidazole as a linking ligand, optionally together with unsaturated benzimidazole or an unsaturated substituted benzimidazole as a further linking ligand.

First claim

The invention claimed is:

1. A zeolitic imidazolate framework material comprising zinc and 4,5,6,7-tetrahydrobenzimidazole.

2. The framework material of claim 1 , further comprising benzimidazole or 5-azabenzimidazole.

3. The framework material of claim 2 , further comprising from 0 mol % to 99 mol % of benzimidazole or 5-azabenzimidazole, based on the total amount of benzimidazole or 5-azabenzimidazole and 4,5,6,7-tetrahydrobenzimidazole or 4,5,6,7-tetrahydro-3H-imidazo[4,5-c]pyridine in the material.

4. The framework material of claim 1 , further comprising an unsaturated benzimidazole or an unsaturated substituted benzimidazole as a linking ligand.

5. The framework material of claim 1 , further comprising one or more divalent transition metal ions.

6. The framework material of claim 1 , further comprising one or more zinc ions or one or more cobalt ions.

7. The framework material of claim 1 , further comprising a 1:1 mixture of lithium and boron ions.

8. The framework material of claim 1 , wherein said framework material exhibits the SOD framework type.

9. The framework material of claim 1 , wherein said framework material exhibits the RHO framework type.

10. A zeolitic imidazolate framework material comprising zinc and 4,5,6,7-tetrahydro-3H-imidazo[4,5-c]pyridine.

11. The framework material of claim 10 , further comprising benzimidazole or 5-azabenzimidazole.

12. The framework material of claim 11 , further comprising from 0 mol % to 99 mol % of benzimidazole or 5-azabenzimidazole, based on the total amount of benzimidazole or 5-azabenzimidazole and 4,5,6,7-tetrahydrobenzimidazole or 4,5,6,7-tetrahydro-3H-imidazo[4,5-c]pyridine in the material.

13. A method of making a zeolitic imidazolate framework material comprising the step of reacting a mixture of a source of a partially saturated benzimidazole or a source of a partially saturated substituted benzimidazole with a source of zinc in the presence of a solvent at a temperature sufficient to form the zeolitic imidazolate framework material.

14. The method of claim 13 in which the temperature is at least 20° C.

15. The method of claim 13 in which the partially saturated benzimidazole comprises 4,5,6,7-tetrahydrobenzimidazole.

16. The method of claim 13 in which the partially saturated substituted benzimidazole comprises 4,5,6,7-tetrahydro-3H-imidazo[4,5-c]pyridine.

17. The method of claim 13 , wherein the source of zinc comprises zinc acetate.

18. The method of claim 13 , wherein the mixture further comprises an unsaturated benzimidazole or an unsaturated substituted benzimidazole.

Assignees

• Exxonmobil Res & Eng Co
• Exxonmobil Res & Engineering Company

Inventors

• Falkowski Joseph M
• Calabro David C
• Du Yi
• Afeworki Mobae
• Weston Simon C

Classifications

• B01D71/0281

  Zeolites · CPC title

• B01D69/141

  Heterogeneous membranes, e.g. containing dispersed material; Mixed matrix membranes · CPC title

• Y02P20/52

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

• B01J20/226

  Coordination polymers, e.g. metal-organic frameworks [MOF], zeolitic imidazolate frameworks [ZIF] (preparation of metal complexes containing carboxylic acid moieties C07C51/418; MOF's per se C07F) · CPC title

• C07C7/13

  by molecular-sieve technique · CPC title