US4119528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroconversion of residua with potassium sulfide
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1977-08-01
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Granted: 1978-10-10
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Expires: 1997-08-01
Abstract
Abstract A process for the simultaneous desulfurization and hydroconversion of heavy carbonaceous feeds, including various sulfur-containing heavy petroleum oils, is disclosed. These feedstocks are contacted with potassium sulfide in a conversion zone maintained at elevated temperatures and in the presence of added hydrogen. In this manner, the feeds are substantially desulfurized, and significant upgrading of these feeds is also obtained as demonstrated by decreased Conradson carbon, increased API gravity, and the conversion of substantial portion of the 1,050 DEG F.+ portion of these feeds. In a preferred embodiment, such a process is disclosed employing a combination of potassium sulfide and sodium sulfide, and in particular these processes include procedures for the regeneration of the sulfides and their recycle to the conversion zone.
Inventors
- 👤 William C. Baird, Jr.
- 👤 Roby Bearden, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:49
CPC Classifications
C; C10; C10G; C10G45/00; C10G29/00; C10G29/06; C10G29/10; C10G47/00; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
82 words
A process for the combined desulfurization and hydroconversion of a heavy hydrocarbon feedstock, which comprises contacting said heavy hydrocarbon feedstock without pretreatment with potassium sulfide in a conversion zone in the presence of a sufficient amount of added hydrogen to produce a hydrogen pressure of from about 500 to 5000 psi, in a conversion zone maintained at an elevated temperature between 500° and 2000° F., so that said heavy hydrocarbon feedstock is converted to lower boiling hydrocarbon products and is substantially desulfurized.
Claim 2
Dependent Claim
82 words
A process for the combined desulfurization and hydroconversion of a heavy hydrocarbon feedstock, which comprises contacting said heavy hydrocarbon feedstock without pretreatment with potassium sulfide in a conversion zone in the presence of a sufficient amount of added hydrogen to produce a hydrogen pressure of from about 500 to 5000 psi, in a conversion zone maintained at an elevated temperature between 500° and 2000° F., so that said heavy hydrocarbon feedstock is converted to lower boiling hydrocarbon products and is substantially desulfurized.
Claim 3
Dependent Claim
31 words
The process of claim 1 wherein said potassium sulfide is present in said conversion zone in an amount ranging from about 1 to 50 weight percent based on said hydrocarbon feedstock.
Claim 4
Dependent Claim
23 words
The process of claim 1 wherein said potassium sulfide is employed in a slurry with said heavy hydrocarbon feedstock in said conversion zone.
Claim 5
Dependent Claim
16 words
The process of claim 1 wherein said hydrogen pressure ranges from about 1500 to 3000 psi.
Claim 6
Dependent Claim
42 words
The process of claim 1 wherein said heavy hydrocarbon feedstock includes at least about 10 weight percent of components boiling above about 1050° F., and wherein at least about 50 percent of said components boiling above about 1050° F. are converted therein.
Claim 7
Dependent Claim
15 words
The process of claim 5 wherein said elevated temperature is greater than about 750° F.
Claim 8
Dependent Claim
41 words
The process of claim 1 wherein less than about 50 weight percent of potassium hydrosulfide is formed in said conversion zone, and wherein said potassium hydrosulfide is converted to potassium sulfide, and said potassium sulfide is recycled to said conversion zone.
Claim 9
Dependent Claim
41 words
The process of claim 7 wherein said potassium hydrosulfide is converted to said potassium sulfide by high temperature steaming of said potassium hydrosulfide to form potassium hydroxide, and said potassium hydroxide is contacted with hydrogen sulfide to produce said potassium sulfide.
Claim 10
Dependent Claim
14 words
The process of claim 1 wherein sodium sulfide is present in said conversion zone.
Claim 11
Dependent Claim
22 words
The process of claim 9 wherein the ratio of said potassium sulfide to said sodium sulfide is between about 50:1 and 1:50.
Claim 12
Dependent Claim
16 words
The process of claim 9 wherein said elevated temperature is between about 500° and 2000° F.
Claim 13
Dependent Claim
48 words
The process of claim 9 wherein said heavy hydrocarbon feedstock includes at least about 10 weight percent of components boiling above about 1050° F., and at least about 50 percent of said components boiling above about 1050° F. are converted to lower boiling products in said conversion zone.
Claim 14
Dependent Claim
43 words
The process of claim 9 wherein sodium hydrosulfide is produced in said conversion zone, and said sodium hydrosulfide is converted to said sodium sulfide by contacting said sodium hydrosulfide in a stripping zone maintained at a temperature between about 200° and 700° 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) | 1981-10-09 | 1982-04-10 | 1982-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-09 | 1986-04-10 | 1986-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-09 | 1990-04-10 | 1990-10-10 | $7700.00 | Window Closed / Lapsed |