US4978512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and method for sweetening hydrocarbons
Assignee: Baker Hughes Holdings LLC
•
Filing: 1989-12-18
•
Granted: 1990-12-18
•
Expires: 2009-12-18
Abstract
Abstract Methods are disclosed for selectively reducing the levels of hydrogen sulfide and oragnic sulfides from gaseous and/or liquid hydrocarbon streams, particularly natural gas streams, compromising contacting the streams with a composition comprising the reaction product of (i) a lower alkanolamine with (ii) a lower aldehyde.
Inventors
- 👤 Edward T. Dillon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:22
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/1493; C; C09; C09K; C09K8/00; C09K8/52; C09K8/528; C09K8/532; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/20; C10L; C10L3/00; C10L3/06; C10L3/10; C09K2208/00; C09K2208/20; C10G2300/00; C10G2300/20; C10G2300/201; C10G2300/207; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/932
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
73 words
A method for selectively reducing the levels of hydrogen sulfide and organic sulfides present in gaseous or liquid hydrocarbon streams or mixtures thereof comprising contacting said streams with a composition comprising the reaction product of (i) an alkanolamine comprising 1 to about 6 carbons with (ii) an aldehyde comprising 1 to about 4 carbons, for a period of time sufficient to reduce the levels of hydrogen sulfide and organic sulfides in said streams.
Claim 2
Independent Claim
73 words
A method for selectively reducing the levels of hydrogen sulfide and organic sulfides present in gaseous or liquid hydrocarbon streams or mixtures thereof comprising contacting said streams with a composition comprising the reaction product of (i) an alkanolamine comprising 1 to about 6 carbons with (ii) an aldehyde comprising 1 to about 4 carbons, for a period of time sufficient to reduce the levels of hydrogen sulfide and organic sulfides in said streams.
Claim 3
Dependent Claim
14 words
A method as in claim 1, wherein (i) is monoethanolamine and (ii) is formaldehyde.
Claim 4
Dependent Claim
22 words
A method as in claim 1, wherein said reaction product is selected from the group consisting of triazine, bisoxazolidine and mixtures thereof.
Claim 5
Dependent Claim
14 words
A method as in claim 1, wherein said reaction product comprises N,N 1 -methylenebisoxazolidine.
Claim 6
Dependent Claim
13 words
A method as in claim 1, wherein said reaction product comprises 1,3,5 tri-(2-hydroxyethyl)-hexahydro-S-triazine.
Claim 7
Dependent Claim
21 words
A method as in claim 1, wherein said reaction product comprises a mixture of N, N 1 -methylenebisoxazolidine and 1,3,5 tri-(2-hydroxyethyl)-hexahydro-S-triazine.
Claim 8
Dependent Claim
21 words
A method as in claim 1, wherein the reaction takes place at a temperature of not greater than about 200° F.
Claim 9
Dependent Claim
26 words
A method as in claim 1, wherein the molar ratio of the said lower alkanolamine to said lower aldehyde is from about 1:0.25 to about 1:10.
Claim 10
Dependent Claim
26 words
A method as in claim 8, wherein the molar ratio of said lower alkanolamine to said lower aldehyde is from about 1:1 to about 1:1 5.
Claim 11
Dependent Claim
27 words
A method as in claim 1, wherein said reaction product comprises a molar ratio of said triazine to said bisoxazolidine of between about 99:1 and about 80:20.
Claim 12
Dependent Claim
20 words
A method as in claim 1 wherein said reaction product has a tertiary amine content of at least about 70%.
Claim 13
Dependent Claim
21 words
A method as in claim 1, wherein said composition is contacted with said streams in an H 2 S scrubber tower.
Claim 14
Dependent Claim
15 words
A method as in claim 1, wherein said composition is injected in-line into said streams.
Claim 15
Dependent Claim
14 words
A method as in claim 13, wherein said composition is injected at the well-head.
Claim 16
Dependent Claim
12 words
A method as in claim 1, wherein said composition further includes methanol.
Claim 17
Independent Claim
80 words
A method for selectively reducing the levels of hydrogen sulfide, organic sulfides and water present in gaseous or liquid hydrocarbon streams or mixtures thereof comprising contacting said streams with a composition comprising (1) the reaction product of (i) an alkanolamine comprising 1 to about 6 carbons with (ii) an aldehyde comprising 1 to about 4 carbons and (2) a glycol, for a period of time sufficient to reduce the levels of hydrogen sulfide, organic sulfides and water in said streams.
Claim 18
Independent Claim
80 words
A method for selectively reducing the levels of hydrogen sulfide, organic sulfides and water present in gaseous or liquid hydrocarbon streams or mixtures thereof comprising contacting said streams with a composition comprising (1) the reaction product of (i) an alkanolamine comprising 1 to about 6 carbons with (ii) an aldehyde comprising 1 to about 4 carbons and (2) a glycol, for a period of time sufficient to reduce the levels of hydrogen sulfide, organic sulfides and water in said streams.
Claim 19
Dependent Claim
12 words
A method as in claim 16, wherein said glycol is triethylene glycol.
Claim 20
Independent Claim
52 words
A method for selectively reducing the levels of hydrogen sulfide and organic sulfides present in gaseous or liquid hydrocarbon streams or mixtures thereof comprising contacting said streams with a composition comprising a triazine, for a period of time sufficient to reduce the levels of hydrogen sulfide and organic sulfides in said streams.
Claim 21
Independent Claim
52 words
A method for selectively reducing the levels of hydrogen sulfide and organic sulfides present in gaseous or liquid hydrocarbon streams or mixtures thereof comprising contacting said streams with a composition comprising a triazine, for a period of time sufficient to reduce the levels of hydrogen sulfide and organic sulfides in said streams.
Claim 22
Dependent Claim
12 words
A method as in claim 18, wherein said triazine is 1,3,5 tri-(2-hydroxyethyl)-hexahydro-S-triazine.
Claim 23
Independent Claim
57 words
A method for selectively reducing the levels of hydrogen sulfide, organic sulfides and water present in gaseous or liquid hydrocarbon streams or mixtures thereof comprising contacting said streams with a composition comprising a triazine and a glycol, for a period of time sufficient to reduce the levels of hydrogen sulfide, organic sulfides and water in said streams.
Claim 24
Independent Claim
57 words
A method for selectively reducing the levels of hydrogen sulfide, organic sulfides and water present in gaseous or liquid hydrocarbon streams or mixtures thereof comprising contacting said streams with a composition comprising a triazine and a glycol, for a period of time sufficient to reduce the levels of hydrogen sulfide, organic sulfides and water in said streams.
Claim 25
Dependent Claim
12 words
A method as in claim 20 wherein said triazine is 1,3,5 tri-(2-hydroxyethyl)-hexahydro-S-triazine.
References Cited (Backward Citations)
US2761818A
Cited
US2776870A
Cited
US2860030A
Cited
US4112049A
Cited
US4107270A
Cited
US4436713A
Cited
US4443423A
Cited
US4748011A
Cited
US4515759A
Cited
US4515759B1
Cited
US4680127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-17 | 1994-06-18 | 1994-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-17 | 1998-06-18 | 1998-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-17 | 2002-06-18 | 2002-12-18 | $7700.00 | Window Closed / Lapsed |