US4511544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen sulfide removal process
Assignee: Chevron USA Inc
•
Filing: 1983-09-30
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Granted: 1985-04-16
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Expires: 2003-09-30
Abstract
Abstract A Stretford process for removing hydrogen sulfide collects a horizontal pool of liquid downstream of the primary gas/liquid contactor and accelerates a multiphase flow along the surface of that pool and along a serpentine path. Additional gas-liquid contact is effected by the interaction of multiphase flow and structural components establishing the pool and causing the acceleration.
Inventors
- 👤 David E. Connell
- 👤 Colin M. Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:40
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/52; B01D53/14; B01D53/18; Y; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
164 words
An improved process for removing hydrogen sulfide from a gas stream comprising the steps of: passing a gas stream containing gaseous hydrogen sulfide through a conduit; introducing a liquid into the gas stream passing through the conduit which reacts with the hydrogen sulfide to produce elemental sulfur; turning the flow of gas, liquid and elemental sulfur abruptly so that liquid and sulfur particles are partially separated from the gas; collecting a pool of liquid and sulfur particles with an overflow baffle; accelerating the gas between the edge of an underflow baffle and the free surface of the pool of liquid upstream of the overflow baffle to obtain gas/liquid contact and using gas momentum to create spray from the overflow baffle through which the gas stream also flows for additional gas/liquid contact; separating the gas from the liquid and elemental sulfur; and passing the gas through an absorber column in counterflow relationship with a second flow of the liquid for reaction with residual hydrogen sulfide.
Claim 2
Dependent Claim
164 words
An improved process for removing hydrogen sulfide from a gas stream comprising the steps of: passing a gas stream containing gaseous hydrogen sulfide through a conduit; introducing a liquid into the gas stream passing through the conduit which reacts with the hydrogen sulfide to produce elemental sulfur; turning the flow of gas, liquid and elemental sulfur abruptly so that liquid and sulfur particles are partially separated from the gas; collecting a pool of liquid and sulfur particles with an overflow baffle; accelerating the gas between the edge of an underflow baffle and the free surface of the pool of liquid upstream of the overflow baffle to obtain gas/liquid contact and using gas momentum to create spray from the overflow baffle through which the gas stream also flows for additional gas/liquid contact; separating the gas from the liquid and elemental sulfur; and passing the gas through an absorber column in counterflow relationship with a second flow of the liquid for reaction with residual hydrogen sulfide.
Claim 3
Dependent Claim
31 words
The process of claim 1 wherein the gas stream passes through a venturi and the liquid is sprayed into the venturi to induce the gas stream to flow through the venturi.
Claim 4
Dependent Claim
46 words
The process of claim 1 wherein the pool of liquid and sulfur particles is collected by extending a vertical baffle into the gas stream with a height in the range of 1/4 to 3/4 the conduit diameter so that the gas stream accelerates over the baffle.
Claim 5
Dependent Claim
51 words
The process of claim 1 wherein the acceleration step is induced in the gas stream by projecting an underflow baffle into the gas stream toward the pool such that the underflow baffle has a depth of 1/4 to 3/4 the conduit diameter so that the gas stream accelerates under the baffle.
Claim 6
Dependent Claim
166 words
An improved Stretford process for removing hydrogen sulfide from a gas stream comprising the steps of: passing a gas stream containing gaseous hydrogen sulfide through a conduit; introducing a Stretford liquid into the gas stream passing through the conduit which reacts with the hydrogen sulfide to produce elemental sulfur; turning the flow of gas, liquid and elemental sulfur abruptly so that liquid and sulfur particles are partially separated from the gas; collecting a pool of liquid and sulfur particles with an overflow baffle; accelerating the gas between the edge of an underflow baffle and the free surface of the pool of liquid upstream of the overflow baffle to obtain gas/liquid contact and using gas momentum to create spray from the overflow baffle through which the gas stream also flows for additional gas/liquid contact; separating the gas from the liquid and elemental sulfur; and passing the gas through an absorber column in counterflow relationship with a second flow of the liquid for reaction with residual hydrogen sulfide.
Claim 7
Dependent Claim
166 words
An improved Stretford process for removing hydrogen sulfide from a gas stream comprising the steps of: passing a gas stream containing gaseous hydrogen sulfide through a conduit; introducing a Stretford liquid into the gas stream passing through the conduit which reacts with the hydrogen sulfide to produce elemental sulfur; turning the flow of gas, liquid and elemental sulfur abruptly so that liquid and sulfur particles are partially separated from the gas; collecting a pool of liquid and sulfur particles with an overflow baffle; accelerating the gas between the edge of an underflow baffle and the free surface of the pool of liquid upstream of the overflow baffle to obtain gas/liquid contact and using gas momentum to create spray from the overflow baffle through which the gas stream also flows for additional gas/liquid contact; separating the gas from the liquid and elemental sulfur; and passing the gas through an absorber column in counterflow relationship with a second flow of the liquid for reaction with residual hydrogen sulfide.
Claim 8
Dependent Claim
31 words
The process of claim 5 wherein the gas stream passes through a venturi and the liquid is sprayed into the venturi to induce the gas stream to glow through the venturi.
Claim 9
Dependent Claim
46 words
The process of claim 5 wherein the pool of liquid and sulfur particles is collected by extending a vertical baffle into the gas stream with a height in the range of 1/4 to 3/4 the conduit diameter so that the gas stream accelerates over the baffle.
Claim 10
Dependent Claim
51 words
The process of claim 5 wherein the acceleration step is induced in the gas stream by projecting an underflow baffle into the gas stream toward the pool such that the underflow baffle has a depth of 1/4 to 3/4 the conduit diameter so that the gas stream accelerates under the baffle.
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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) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |