US4263020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of sulfur from process streams
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1980-01-02
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Granted: 1981-04-21
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Expires: 2000-01-02
Abstract
Abstract A process wherein a particulate mass of a metal alumina spinel, MAl2O4 wherein M is chromium, iron, cobalt, nickel, copper, cadmium or mercury, particularly zinc alumina spinel (ZnAl2O4), is contacted with a process stream which contains sulfur, sulfur compounds, and other contaminants, these being adsorbed onto said particulate mass of metal alumina spinel, and the process stream thereby denuded of said sulfur, sulfur compounds, and other contaminants. Thereafter, the sulfur, sulfur compounds, and other contaminants, are readily desorbed, or removed from said particulate mass of metal alumina spinel by contacting, and purging same with a relatively clean gas stream, suitably hydrogen, hydrogen-containing gas, or an inert gas, at elevated temperature.
Inventors
- 👤 Paul E. Eberly, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:28
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; Y; Y10; Y10S; Y10S502/00; Y10S502/524; Y10S95/00; Y10S95/90
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
47 words
A process for the removal of sulfur from a sulfur containing process stream which comprises contacting said stream with a metal alumina spinel sorbent characterized by the formula M Al.sub.2 O.sub.4 wherein M is chromium, iron, cobalt, nickel, copper, cadmium, mercury, or zinc to adsorb sulfur thereon.
Claim 2
Dependent Claim
47 words
A process for the removal of sulfur from a sulfur containing process stream which comprises contacting said stream with a metal alumina spinel sorbent characterized by the formula M Al.sub.2 O.sub.4 wherein M is chromium, iron, cobalt, nickel, copper, cadmium, mercury, or zinc to adsorb sulfur thereon.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein the metal alumina spinel is zinc alumina spinel.
Claim 4
Dependent Claim
42 words
The process of claim 1 wherein the metal alumina spinel, which contains adsorbed sulfur after completion of the sulfur sorption cycle, is contacted with an essentially non-reactive or reducing gas at elevated temperature, the sulfur being desorbed and the sorbent thereby regenerated.
Claim 5
Dependent Claim
22 words
The process of claim 3 wherein the gas employed to desorb the sulfur from the metal alumina spinel is comprised of hydrogen.
Claim 6
Dependent Claim
39 words
The process of claim 1 wherein the metal alumina spinel sorbent is zinc alumina spinel, and the zinc alumina spinel sorbent is contacted with an essentially hydrogen gas at elevated temperature to desorb the sulfur and regenerate the sorbent.
Claim 7
Dependent Claim
27 words
The process of claim 5 wherein the hydrogen is contacted with said zinc alumina spinel sorbent at temperatures ranging from about 300° F. to about 1200° F.
Claim 8
Dependent Claim
27 words
The process of claim 6 wherein the hydrogen is contacted with said zinc alumina spinel sorbent at temperatures ranging from about 500° F. to about 1000° F.
Claim 9
Dependent Claim
110 words
In a process for the removal of sulfur from a sulfur containing process stream wherein a series of on-stream reactors are provided with beds of a sulfur sensitive platinum-containing catalyst, a naphtha feed with hydrogen is cocurrently passed sequentially through said series of reactors, and a vaporous effluent rich in hydrogen is taken from the last reactor of the series, hydrogen is separated from the products and recycled, the improvement which comprises contacting said hydrogen recycle stream, prior to its recycle, with a metal alumina spinel sorbent characterized by the formula M Al.sub.2 O.sub.4 wherein M is chromium, iron, cobalt, nickel, copper, cadmium, mercury, or zinc to adsorb sulfur thereon.
Claim 10
Dependent Claim
110 words
In a process for the removal of sulfur from a sulfur containing process stream wherein a series of on-stream reactors are provided with beds of a sulfur sensitive platinum-containing catalyst, a naphtha feed with hydrogen is cocurrently passed sequentially through said series of reactors, and a vaporous effluent rich in hydrogen is taken from the last reactor of the series, hydrogen is separated from the products and recycled, the improvement which comprises contacting said hydrogen recycle stream, prior to its recycle, with a metal alumina spinel sorbent characterized by the formula M Al.sub.2 O.sub.4 wherein M is chromium, iron, cobalt, nickel, copper, cadmium, mercury, or zinc to adsorb sulfur thereon.
Claim 11
Dependent Claim
14 words
The process of claim 8 wherein the metal alumina spinel is zinc alumina spinel.
Claim 12
Dependent Claim
40 words
The process of claim 9 wherein the metal alumina spinel, which contains adsorbed sulfur after completion of the sulfur sorption cycle, is contacted with an essentially hydrogen gas at elevated temperature, the sulfur being adsorbed and the sorbent thereby regenerated.
Claim 13
Dependent Claim
39 words
The process of claim 9 wherein the metal alumina spinel sorbent is zinc alumina spinel, and the zinc alumina spinel sorbent is contacted with an essentially hydrogen gas at elevated temperature to desorb the sulfur and regenerate the sorbent.
Claim 14
Dependent Claim
27 words
The process of claim 11 wherein the hydrogen is contacted with said zinc alumina spinel sorbent at temperatures ranging from about 300° F. to about 1200° F.
Claim 15
Dependent Claim
27 words
The process of claim 12 wherein the hydrogen is contacted with said zinc alumina spinel sorbent at temperatures ranging from about 500° F. to about 1000° F.
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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) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |