Patent US4511544A successfully refreshed from Google Patents.
US4511544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen sulfide removal process
Assignee: Chevron USA Inc
•
Filing: 1983-09-30
•
Granted: 1985-04-16
•
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 01:52
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.
References Cited (Backward Citations)
US3172725A
Cited
US2256374A
Cited
US2997439A
Cited
US3097926A
Cited
US3618908A
Cited
US3815332A
Cited
US4005999A
Cited
US4125597A
Cited
US4334897A
Cited
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 |