Process for combusting solid sulfur-containing material

• US 4,758,418 A
• Filed: 12/11/1986
• Issued: 07/19/1988
• Est. Priority Date: 07/29/1980
• Status: Expired due to Term

• Current Assignee: W R Grace & Company - CONN (Standard Industries Holdings, Inc.)
• Original Assignee: Union Carbide Corporation (Dow, Inc.)
• Inventors: Yoo, Jin S., Jaecker, John A.
• Primary Examiner(s): Sneed, H. M. S.
• Assistant Examiner(s): MYERS, HELANE ELEANORA
• Application Number:
  US06/940,619
• Time in Patent Office: 586 Days
• Field of Search: 423/244 R, 55/73
• US Class Current: 423/244.05
• CPC Class Codes: B01J 21/005 Spinels
• CPC Class Codes: B01J 23/005 Spinels
• CPC Class Codes: B01J 37/04 Mixing B01J37/0009, B01J37/0018 take precedence
• CPC Class Codes: C10G 11/04 Oxides

Abstract

An improved process for converting hydrocarbons using a catalyst which is periodically regenerated to remove carbonaceous deposits, the catalyst being comprised of a mixture containing, as a major component, solid particles capable of promoting hydrocarbon conversion at hydrocarbon conversion conditions, and, as a minor component, discrete entities comprising at least one spinel, preferably alkaline earth metal-containing spinel; thereby reducing the amount of sulfur oxides exiting the catalyst regeneration zone.

Improved hydrocarbon conversion catalysts are also disclosed.

Claims

1. In a process for combusting solid, sulfur-containing material by contacting said material with gaseous oxygen in a combustion zone at combustion conditions to produce combustion products including at least one sulfur oxide, the improvement comprising carrying out said contacting in the presence of discrete particles containing a metal-containing spinel, thereby reducing the amount of sulfur oxide emitted from said combustion zone, said metal containing spinel including a first metal and at least two different second metals having valences higher than the valence of said first metal, one of said second metals being aluminum and the other of said second metals being trivalent and selected from the group consisting of iron, chromium, vanadium, manganese, gallium, boron, cobalt and mixtures thereof, the atomic ratio of said first metal to said second metals in said spinel is at least about 0.17 and said spinel has a surface area in the range of about 25 m² /gm. to about 600 m² /gm.

2. In a process for combusting solid, sulfur-containing material by contacting said material with a gaseous oxygen in a combustion zone at combustion conditions to produce combustion products including at least one sulfur oxide, the improvement comprising carrying out said contacting in the presence of discrete particles containing a major amount of metal-containing spinel, thereby reducing the amount of sulfur oxide emitted from said combustion zone, said metal containing spinel including a first metal and at least two different second metals having valences higher than the valence of said first metal, one of said second metals being aluminum and the other of said second metals being trivalent and selected from the group consisting of iron, chromium, vanadium, manganese, gallium, boron, cobalt and mixtures thereof, the atomic ratio of said first metal to said second metals in said spinel is at least about 0.17.