US4171285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfur-reactive contact material having improved diffusion characteristics
Assignee: Chevron USA Inc
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Filing: 1978-05-18
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Granted: 1979-10-16
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Expires: 1998-05-18
Abstract
Abstract Sulfur-containing impurities are removed from a refined hydrocarbon feed by contact thereof with a porous sulfur-reactive agent having a pore volume of at least 0.15 cc per cc of which at least 5% is in pores having a diameter in the range 0.1 to 15 microns. The agent contains at least one sulfur-reactive material from the group copper, iron, zinc and compounds thereof.
Inventors
- 👤 Bernard F. Mulaskey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:08
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/04; C10G29/06; C10G67/00; C10G67/02; C10G69/00; C10G69/02; C10G69/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
156 words
A composition comprising a rigidly interconnected pack of irregularly shaped particles sized in the average diameter range below about 0.15 mm, said pack having a pore volume of at least 0.15 cc per cc and having throughout the pack access channels among said particles, said channels comprising interconnected pores having diameters in the range of from about 0.1 to about 15 microns, said pores contributing at least about 5 percent of said pore volume; said particles being of the same or different materials and comprising at least one material selected from the group consisting of (1) sulfur-reactive agents, (2) composites of said agents and at least one refractory oxide selected from the group consisting of the oxides of the metals of Groups II, III and IV; said composition containing at least about 1 weight percent of said agent and having a surface area in the range of from about 2 to 700 square meters per gram.
Claim 2
Dependent Claim
156 words
A composition comprising a rigidly interconnected pack of irregularly shaped particles sized in the average diameter range below about 0.15 mm, said pack having a pore volume of at least 0.15 cc per cc and having throughout the pack access channels among said particles, said channels comprising interconnected pores having diameters in the range of from about 0.1 to about 15 microns, said pores contributing at least about 5 percent of said pore volume; said particles being of the same or different materials and comprising at least one material selected from the group consisting of (1) sulfur-reactive agents, (2) composites of said agents and at least one refractory oxide selected from the group consisting of the oxides of the metals of Groups II, III and IV; said composition containing at least about 1 weight percent of said agent and having a surface area in the range of from about 2 to 700 square meters per gram.
Claim 3
Dependent Claim
21 words
A composition as in claim 1 wherein said refractory oxide is catalytic cracking catalyst fines and said agent is copper chromite.
Claim 4
Independent Claim
34 words
A method for preparing a sulfur reactive contact material which comprises: mixing a sulfur-reactive agent with a hydrocolloid-forming organic compound to form an extrudable dough; extruding the mixture; and drying and calcining the extrudates.
Claim 5
Independent Claim
34 words
A method for preparing a sulfur reactive contact material which comprises: mixing a sulfur-reactive agent with a hydrocolloid-forming organic compound to form an extrudable dough; extruding the mixture; and drying and calcining the extrudates.
Claim 6
Dependent Claim
17 words
A method as recited in claim 3, wherein said hydrocolloid-forming organic compound is wheat flour and water.
Claim 7
Dependent Claim
14 words
A method as recited in claim 3, wherein said sulfur-reactive agent are copper chromite.
Claim 8
Dependent Claim
53 words
A method for preparing a sulfur-reactive contact material as recited in claim 3, which further comprises: mixing a refractory oxide selected from the oxides of the metals of Groups II, III and IV of the periodic table of the elements with the sulfur-reactive agent and hydrocolloid-forming organic compound to form the extrudable dough.
Claim 9
Dependent Claim
16 words
A method as recited in claim 6 wherein said refractory oxide comprises catalytic cracking catalyst fines.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-15 | 1983-04-16 | 1983-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-15 | 1987-04-16 | 1987-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-15 | 1991-04-16 | 1991-10-16 | $7700.00 | Window Closed / Lapsed |