Method for dehydrogenating a butene-containing hydrocarbon stream

Patent metadata

Field	Value
Publication number	US-10294176-B2
Application number	US-201816157959-A
Country	US
Kind code	B2
Filing date	Oct 11, 2018
Priority date	Apr 13, 2017
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

A method of oxidative dehydrogenating a butane-containing hydrocarbon stream by contacting the same with a bimetallic catalyst in the presence of an oxidant, wherein the bimetallic catalyst comprises nickel and bismuth on a titanium carbide catalyst support. Various embodiments of the method of oxidative dehydrogenating the butane-containing hydrocarbon stream and the bimetallic catalyst are also provided.

First claim

The invention claimed is:

1. A method of dehydrogenating a butane-containing hydrocarbon stream, comprising:
pretreating a bimetallic catalyst in a fixed bed reactor by heating to a temperature above 500° C. then cooling to a temperature of 400-450° C. then
contacting the butane-containing hydrocarbon stream with the bimetallic catalyst in the presence of oxygen to form a product stream comprising a butene compound,
wherein the bimetallic catalyst consists of nickel oxide and bismuth oxide on a titanium carbide catalyst support.

2. The method of claim 1 , wherein the butene compound is one or more of 1-butene, cis-2-butene, trans-2-butene, 1,3-butadiene, and isobutylene.

3. The method of claim 1 , wherein a weight percent of nickel in the bimetallic catalyst is within a range of 15 wt % to 25 wt %, relative to the total weight of the bimetallic catalyst.

4. The method of claim 1 , wherein a weight percent of bismuth in the bimetallic catalyst is within a range of 25 wt % to 35 wt %, relative to the total weight of the bimetallic catalyst.

5. The method of claim 1 , wherein a volume fraction of butane in the butane-containing hydrocarbon stream is at least 0.9.

6. The method of claim 1 , wherein a molar ratio of oxygen to butane is in a range of 1:1 to 4:1.

7. The method of claim 1 , wherein the bimetallic catalyst has an average particle size in a range of 0.1 to 2 mm.

8. The method of claim 1 , wherein the product stream further comprises non-butene compounds, and wherein a molar ratio of the butene compound to the non-butene compounds is at least 0.8.

9. The method of claim 1 , wherein a conversion of butane is in a range of 5 to 30 mol %, and wherein a yield of the butene compound is in a range of 5% to 20% based on the conversion of butane.

10. The method of claim 1 , further comprising:
mixing the butane-containing hydrocarbon stream with an inert gas to form a gaseous mixture prior to the contacting, wherein a volume fraction of the butane-containing hydrocarbon stream in the gaseous mixture is within a range of 0.01 to 0.1.

Assignees

• Univ King Fahd Pet & Minerals

Inventors

• Alkhattaf Sulaiman S
• Aljundi Isam
• Elmahadi Omer Elmutasim

Classifications

• C07C5/48 Primary

  with oxygen as an acceptor · CPC title

• B01J37/08

  Heat treatment {(B01J37/0009, B01J37/0018 take precedence)} · CPC title

• B01J37/0236

  Drying, e.g. preparing a suspension, adding a soluble salt and drying · CPC title

• B01J35/023

  Operations & Transport · mapped topic

• C07C2523/843

  Arsenic, antimony or bismuth · CPC title