Low-temperature oxidative dehydrogenation of low-carbon alkanes to light olefins with micro-mesoporous catalyst

Patent metadata

Field	Value
Publication number	US-2025276308-A1
Application number	US-202519068863-A
Country	US
Kind code	A1
Filing date	Mar 3, 2025
Priority date	Mar 1, 2024
Publication date	Sep 4, 2025
Grant date	—

Abstract

The present disclosure relates to a heterogeneous catalyst composition comprising a metal catalyst chemically interacted with a micro-mesoporous aluminosilicate support. A process for catalytic oxidative dehydrogenation of hydrocarbons may include contacting, in a reactor system, a hydrocarbon-containing feedstock with the heterogeneous catalyst composition to generate olefinic compounds. A process for preparing a heterogeneous catalyst composition may include combining a micro-mesoporous aluminosilicate support with a metal catalyst precursor to form a catalyst precursor mixture, and heating the catalyst precursor mixture to a temperature of about 390° C. to about 750° C. to form a heterogeneous catalyst composition.

First claim

What is claimed:

1 . A heterogeneous catalyst composition comprising a metal catalyst chemically interacted with a micro-mesoporous aluminosilicate support.

2 . The heterogeneous catalyst composition of claim 1 , wherein the metal catalyst is a transition metal catalyst.

3 . The heterogeneous catalyst composition of claim 2 , wherein the transition metal catalyst is selected from Groups 5 to 12 of the Periodic Table of Elements, and any combination thereof.

4 . The heterogeneous catalyst composition of claim 1 , wherein the aluminosilicate is in the form of zeolite.

5 . The heterogeneous catalyst composition of claim 1 , wherein the micro-mesoporous aluminosilicate has a mesopore volume of at least 0.05 cm 3 /g, determined from Ar adsorption isotherms measured at 87 K.

6 . The heterogeneous catalyst composition of claim 1 , wherein the micro-mesoporous aluminosilicate has a micropore volume of at least 0.03 cm 3 /g, determined from Ar adsorption isotherms measured at 87 K.

7 . The heterogeneous catalyst composition of claim 1 , wherein the metal catalyst is on the surface of the aluminosilicate, in mesopores of the aluminosilicate, in micropores of the aluminosilicate, or any combination thereof.

8 . A process for catalytic oxidative dehydrogenation of hydrocarbons, the process comprising:
contacting, in a reactor system, a hydrocarbon-containing feedstock with a heterogeneous catalyst composition comprising a metal catalyst chemically interacted with a micro-mesoporous aluminosilicate support to generate an olefinic compound.

9 . The process of claim 8 , wherein the process is an exothermic process.

10 . The process of claim 8 , wherein contacting in the reactor system is conducted at a temperature of about 750° C. or less.

11 . The process of claim 8 , wherein the process is carried out at a pressure of about 5 atm or less.

12 . The process of claim 8 , wherein the olefinic compound comprises light olefins, α-olefins, terminal dienes, or any combination thereof.

13 . The process of claim 8 , wherein the hydrocarbon-containing feedstock comprises refinery range hydrocarbon.

14 . The process of claim 8 , wherein the contacting is in the presence of:
an oxygen source, wherein the oxygen source comprises a purified O 2 stream, an air stream, or any combination thereof; and optionally, a diluent selected from the group consisting of nitrogen, argon, and helium.

15 . The process of claim 8 , wherein the reactor system comprises a single reactor or at least a first reactor and a second reactor connected in a continuous loop for catalyst circulation.

16 . The process of claim 14 , wherein the reactor system comprises a single reactor, and the heterogeneous catalyst composition is contacted sequentially, first with the hydrocarbon-containing feedstock, then with the oxygen source.

17 . A process for preparing the heterogeneous catalyst composition of claim 1 , the process comprising:
adding, to a micro-mesoporous aluminosilicate support, a metal catalyst precursor to form a catalyst precursor mixture; and heating the catalyst precursor mixture to a temperature of from 390° C. to 750° C. to form the heterogeneous catalyst composition.

18 . The process of claim 15 , further comprising:
preparing the heterogeneous catalyst composition of claim 1 outside of the reactor system, wherein preparing the heterogeneous catalyst composition outside of the reactor system comprises:
adding, to a micro-mesoporous aluminosilicate support, a metal catalyst precursor to form a catalyst precursor mixture, and
heating the catalyst precursor mixture to a temperature of from 390° C. to 750° C. to form the heterogeneous catalyst composition; and
loading the heterogeneous catalyst composition into the reactor system.

19 . The process of claim 14 , wherein the micro-mesoporous aluminosilicate support is synthesized by hydrotreating a microporous aluminosilicate in the presence of a surfactant.

20 . The process of claim 14 , wherein the heating is conducted at a temperature of about 450° C. to about 750° C.

Assignees

• Braskem America Inc

Inventors

• Khurana Ishant
• Xie Dan
• Gregorich Graham
• Mitchell Scott

Classifications

• C07C2529/06

  Crystalline aluminosilicate zeolites; Isomorphous compounds thereof · CPC title

• C07C5/3332

  with metal oxides or metal sulfides · CPC title

• B01J35/633

  less than 0.5 ml/g · CPC title

• C07C2529/46

  Iron group metals or copper · CPC title

• C07C5/333

  Catalytic processes · CPC title