Combined desulfurization and hydroconversion with alkali metal hydroxides
First Claim
1. A process for the simultaneous desulfurization and hydroconversion of a sulfur-containing hydrocarbon feedstock containing at least 10 wt.% of materials boiling above about 1,050°
- F, which comprises contacting said hydrocarbon feedstock, substantially in a liquid state, with an alkali metal hydroxide in a conversion zone, in the presence of added hydrogen, said conversion zone being maintained at elevated temperatures ranging between 500°
-1,500°
F, whereby the sulfur and metals content of said hydrocarbon feedstock is reduced and wherein at least a portion of the 1,050°
F+ fraction of said feedstock is converted to lower boiling products.
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Abstract
Processes for the simultaneous desulfurization and hydroconversion of heavy carbonaceous feeds, including various sulfur-containing heavy petroleum oils, are disclosed. These feeds are contacted with alkali metal hydroxides in a conversion zone, in the presence of added hydrogen, and at elevated temperatures, whereby the feeds are substantially desulfurized, while at the same time significant upgrading of these feedstocks is obtained as demonstrated by decreased Conradson carbon, increased API gravity, and the conversion of a substantial portion of the 1,050° F+ portion of the feedstream. In addition, methods for the regeneration of alkali metal hydroxides from the alkali metal salts produced in the conversion zone are disclosed.
118 Citations
21 Claims
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1. A process for the simultaneous desulfurization and hydroconversion of a sulfur-containing hydrocarbon feedstock containing at least 10 wt.% of materials boiling above about 1,050°
- F, which comprises contacting said hydrocarbon feedstock, substantially in a liquid state, with an alkali metal hydroxide in a conversion zone, in the presence of added hydrogen, said conversion zone being maintained at elevated temperatures ranging between 500°
-1,500°
F, whereby the sulfur and metals content of said hydrocarbon feedstock is reduced and wherein at least a portion of the 1,050°
F+ fraction of said feedstock is converted to lower boiling products. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 21)
- F, which comprises contacting said hydrocarbon feedstock, substantially in a liquid state, with an alkali metal hydroxide in a conversion zone, in the presence of added hydrogen, said conversion zone being maintained at elevated temperatures ranging between 500°
-
12. A process for the simultaneous desulfurization and hydroconversion of a sulfur-containing feedstock, said feedstock containing at least 10 wt.% of materials boiling above about 1,050°
- F, which comprises contacting said hydrocarbon feedstock, substantially in a liquid state, with an alkali metal hydroxide in a conversion zone being maintained at a temperature of between about 700° and
1,500°
F, so that at least a portion of said alkali metal hydroxides are converted to alkali metal sulfides in said conversion zone, and whereby the sulfur and metals content of said feedstock is reduced, and furthermore wherein at least a portion of the 1,050°
F+ portion of said feedstock is converted to lower boiling materials, withdrawing said desulfurized and hydroconverted feedstock and said alkali metal sulfides from said conversion zone, separating said alkali metal hydroxides and alkali metal sulfides from the products withdrawn from said conversion zone, regenerating said alkali metal hydroxides from said alkali metal sulfides, and recycling said alkali metal hydroxides to said conversion zone. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
- F, which comprises contacting said hydrocarbon feedstock, substantially in a liquid state, with an alkali metal hydroxide in a conversion zone being maintained at a temperature of between about 700° and
Specification