Desulfurization of fluid materials
AssigneeUnion Oil Company of California
InventorsD. Alan R. Kay, William G. Wilson
Life of this patent
Estimating the term…
Abstract
A method for desulfurizing fluid materials, comprising reacting sulfur to be removed with a rare earth compound, thereby forming rare earth sulfides, oxysulfides or mixtures thereof. The reaction is conducted under conditions of low oxygen potential. Rare earth sulfides and oxysulfides can be reacted with oxygen to restore a capacity for desulfurization.
Claims24
A method for decreasing the concentration of reactive sulfur in a fluid material, comprising reacting at least a portion of the sulfur with a nonmetallic rare earth compound, at a sufficiently low oxygen potential to form one of the group consisting of rare earth sulfides, rare earth oxysulfides, and mixtures thereof.
A method for desulfurizing molten iron, comprising reacting sulfur to be removed with a nonmetallic rare earth compound, at a sufficiently low oxygen potential to form one of the group consisting of rare earth sulfides, rare earth oxysulfides, and mixtures thereof.
A method for desulfurizing gases, comprising reacting sulfur to be removed with a nonmetallic rare earth compound, at a sufficiently low oxygen potential to form one of the group consisting of rare earth sulfides, rare earth oxysulfides, and mixtures thereof.
A method for decreasing the hydrogen sulfide content of gases, comprising reacting at least a portion of the hydrogen sulfide with calcined bastnasite concentrate, at a sufficiently low oxygen potential to form one of the group consisting of rare earth sulfides, rare earth oxysulfides, and mixtures thereof.
Dependencies are inferred from the claim text.