Patent US5010052A successfully refreshed from Google Patents.
US5010052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zirconium dioxide gas desulfurization catalyst
Assignee: Rhodia Chimie SAS
•
Filing: 1989-06-19
•
Granted: 1991-04-23
•
Expires: 2009-06-19
Abstract
Abstract Solid catalyst substrates based on zirconium dioxide and, optionally, titanium dioxide and/or cerium dioxide, e.g., honeycombs or monoliths, are well adapted for the desulfurization and catalytic conversion of industrial gases containing contaminating amounts of objectionable sulfur compounds.
Inventors
- 👤 Eric Quemere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:11
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/06; B01J21/066; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8603; B01D53/8612; B01D53/8615; B01J21/063; B01J23/00; B01J23/10; C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/0404; C01B17/0426; C01B17/0434
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
40 words
A catalyst adapted for the desulfurization of gases in a Claus process, comprising a solid shaped article including catalytically effective amounts of zirconium dioxide and cerium dioxide, a catalyst support including zirconium dioxide and a support phase including titanium dioxide.
Claim 2
Dependent Claim
40 words
A catalyst adapted for the desulfurization of gases in a Claus process, comprising a solid shaped article including catalytically effective amounts of zirconium dioxide and cerium dioxide, a catalyst support including zirconium dioxide and a support phase including titanium dioxide.
Claim 3
Dependent Claim
16 words
A catalyst as defined by claim 1, further including a catalytically effective amount of titanium dioxide.
Claim 4
Dependent Claim
12 words
The catalyst as defined by claimed 1, comprising a honeycomb shaped article.
Claim 5
Dependent Claim
40 words
A catalyst adapted for the desulfurization of gases in a Claus process, comprising a solid shaped article including catalytically effective amounts of zirconium dioxide and cerium oxide, a catalyst support including titanium dioxide and a support phase including zirconium dioxide.
Claim 6
Dependent Claim
40 words
A catalyst adapted for the desulfurization of gases in a Claus process, comprising a solid shaped article including catalytically effective amounts of zirconium dioxide and cerium oxide, a catalyst support including titanium dioxide and a support phase including zirconium dioxide.
Claim 7
Dependent Claim
16 words
A catalyst as defined by claim 4, further including a catalytically effective amount of titanium dioxide.
Claim 8
Dependent Claim
12 words
The catalyst as defined by claim 4, comprising a honeycomb shaped article.
References Cited (Backward Citations)
US2206921A
Cited
US2338089A
Cited
US2436125A
Cited
US4233139A
Cited
US4295818A
Cited
JPS58114730A
Cited
US4640908A
Cited
US4656155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-04-22 | 1994-10-22 | 1995-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-22 | 1998-10-22 | 1999-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-22 | 2002-10-22 | 2003-04-23 | $7700.00 | Window Closed / Lapsed |