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US 4,119,528 AGranted
Hydroconversion of residua with potassium sulfide
AssigneeExxon Research & Engineering Co.
InventorsWilliam C. Baird, Jr., Roby Bearden, Jr.
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AssigneeExxon Research & Engineering Co.
InventorsWilliam C. Baird, Jr., Roby Bearden, Jr.
Estimating the term…
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.degree. 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.
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.degree. and 2000.degree. F., so that said heavy hydrocarbon feedstock is converted to lower boiling hydrocarbon products and is substantially desulfurized.
Dependencies are inferred from the claim text.