Methods for dehydrogenating reactant hydrocarbons

Patent metadata

Field	Value
Publication number	US-10518249-B2
Application number	US-201816139702-A
Country	US
Kind code	B2
Filing date	Sep 24, 2018
Priority date	Mar 2, 2018
Publication date	Dec 31, 2019
Grant date	Dec 31, 2019

Abstract

According to one or more embodiments presently disclosed, one or more reactant hydrocarbons may be dehydrogenated by a method that includes contacting the one or more reactant hydrocarbons with a catalyst system to dehydrogenate at least a portion of the reactant hydrocarbons. The catalyst system may include a zincosilicate support material that includes an MFI framework type structure incorporating at least silicon and zinc. The catalyst system may further include one or more alkali or alkaline earth metals, and one or more platinum group metals.

First claim

What is claimed is:

1. A method for dehydrogenating one or more reactant hydrocarbons, the method comprising:
contacting the one or more reactant hydrocarbons with a catalyst system to dehydrogenate at least a portion of the reactant hydrocarbons, the catalyst system comprising:
a zincosilicate support material comprising an MFI framework type structure incorporating at least silicon and zinc;
one or more alkali or alkaline earth metals; and
one or more platinum group metals.

2. The method of claim 1 , wherein the reactant hydrocarbons comprise one or more of n-butane, n-pentane, or n-hexane.

3. The method of claim 2 , wherein the method for dehydrogenating the reactant hydrocarbons results in a selectivity of n-butene, n-pentene, or n-hexene of at least 30 mol. %.

4. The method of claim 2 , wherein the method for dehydrogenating the reactant hydrocarbons results in a yield of n-butene, n-pentene, or n-hexane of at least 20 mol. %.

5. The method of claim 1 , wherein the reactant hydrocarbons are mixed with a diluent, the diluent comprising hydrogen, steam, methane, argon, nitrogen, or mixtures thereof.

6. The method of claim 5 , wherein the diluent comprises from 5 vol. % to 30 vol. % of hydrogen.

7. The method of claim 1 , wherein the molar ratio of zinc to silicon in the MFI framework type structure is from 1:30 to 1:5.

8. The method of claim 1 , wherein the zincosilicate support material comprises at least 95 wt. % of silicon, zinc, and oxygen in its framework structure.

9. The method of claim 1 , wherein the one or more alkali or alkaline earth metals are selected from K, Na, or Cs.

10. The method of claim 1 , wherein the catalyst system comprises the alkali or alkaline earth metals in a total amount of from 0.1 wt. % to 3 wt. % of the catalyst system.

11. The method of claim 1 , wherein at least a portion of the one or more alkali or alkaline earth metals are present in elemental form.

12. The method of claim 1 , wherein the one or more platinum group metals are selected from Ru, Rh, Pd, Ir, or Pt.

13. The method of claim 1 , wherein the catalyst system comprises the one or more platinum group metals in a total amount of from 0.1 wt. % to 1 wt. % of the catalyst system.

14. The method of claim 1 , wherein at least a portion of the one or more platinum group metals are present in elemental form.

Assignees

• Saudi Arabian Oil Co

Inventors

• Al-Daous Mohammed Abdulmajeed

Classifications

• C10G2400/20

  C2-C4 olefins · CPC title

• C10G49/06

  containing platinum group metals or compounds thereof · CPC title

• B01J37/0009

  Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst · CPC title

• C01B39/06

  Preparation of isomorphous zeolites characterised by measures to replace the aluminium or silicon atoms in the lattice framework by atoms of other elements {, i.e. by direct or secondary synthesis} · CPC title

• C10G35/065

  containing crystalline zeolitic molecular sieves, other than aluminosilicates · CPC title