Methods for producing olefins

Patent metadata

Field	Value
Publication number	US-12351552-B2
Application number	US-202118257895-A
Country	US
Kind code	B2
Filing date	Dec 15, 2021
Priority date	Dec 18, 2020
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

According to one or more embodiments of the present disclosure, a method for producing olefins includes contacting a hydrocarbon-containing feed with a catalyst in a reactor portion of a reactor system to form an olefin-containing effluent, separating at least a portion of the olefin-containing effluent from the catalyst, passing the catalyst to a catalyst-processing portion of the reactor system and processing the catalyst to produce a processed catalyst and a combustion gas, passing the processed catalyst from the catalyst-processing portion to the reactor portion, and introducing a combustion additive to the reactor system when the combustion gas comprises one or more hydrocarbons in an amount greater than 5% of an LFL of the combustion gas at a temperature and pressure of the catalyst processing portion. The catalyst may include from 1 ppmw to 150 ppmw platinum. The combustion additive may include from 150 ppmw to 1,000 ppmw platinum.

First claim

The invention claimed is:

1. A method for producing olefins, the method comprising:
contacting a hydrocarbon-containing feed with a catalyst in a reactor portion of a reactor system to form an olefin-containing effluent;
separating at least a portion of the olefin-containing effluent from the catalyst;
passing the catalyst to a catalyst-processing portion of the reactor system and processing the catalyst to produce a processed catalyst and a combustion gas;
passing the processed catalyst from the catalyst processing portion to the reactor portion; and
introducing a combustion additive to the reactor system when the combustion gas comprises one or more hydrocarbons in an amount greater than 5% of a lower flammability level of the combustion gas at a temperature and pressure of the catalyst-processing portion, wherein:
the catalyst comprises from 1 parts per million by weight to 150 parts per million by weight platinum; and
the combustion additive comprises from 150 parts per million by weight to 1,000 parts per million by weight platinum.

2. The method of claim 1 , wherein the catalyst further comprises gallium and a support material.

3. The method of claim 2 , wherein the catalyst comprises from 0.1 weight percent to 10.0 weight percent gallium.

4. The method of claim 2 , wherein the support material comprises alumina, silica, titanium oxide, or zirconium.

5. The method of claim 1 , wherein the catalyst further comprises less than or equal to 5 weight percent alkali metal or alkaline earth metal.

6. The method of claim 1 , wherein the combustion additive further comprises gallium and a support material.

7. The method of claim 6 , wherein the combustion additive comprises from 0.1 weight percent to 10.0 weight percent gallium.

8. The method of claim 6 , wherein the support material comprises alumina, silica, titanium oxide, or zirconium.

9. The method of claim 1 , wherein the combustion additive further comprises less than or equal to 5 weight percent alkali metal or alkaline earth metal.

10. The method of claim 1 , wherein processing the catalyst comprises combusting a supplemental fuel in the catalyst-processing portion to heat the catalyst.

11. The method of claim 10 , wherein the supplemental fuel comprises methane, natural gas, ethane, propane, or hydrogen.

12. The method of claim 1 , wherein processing the catalyst comprises contacting the catalyst with an oxygen-containing gas.

13. The method of claim 1 , wherein the combustion additive is introduced to the reactor portion, the catalyst-processing portion, or both.

14. The method of claim 1 , wherein the amount of the combustion additive introduced to the reactor system is from 0.05 volume percent to 2 volume percent of a sum of a volume of the catalyst and a volume of the combustion additive.

15. The method of claim 1 , wherein the combustion additive comprises at least 1.1 times greater platinum than the catalyst.

Assignees

• Dow Global Technologies Llc

Inventors

• Luo Lin
• Yang Yang
• Koeken Adrianus
• Stears Brien
• Bollmann Luis
• Malek Andrzej
• Goodfellow Brian W

Classifications

• B01J23/96 Primary

  of catalysts comprising metals, oxides or hydroxides of the noble metals · CPC title

• B01J38/02

  Heat treatment · CPC title

• B01J38/30

  in gaseous suspension, e.g. fluidised bed · CPC title

• C07C2523/62

  with gallium, indium, thallium, germanium, tin or lead · CPC title

• B01J21/04

  Alumina · CPC title