Methods for recovering sodium sulfides from a sulfur scavenging reaction
AssigneeQuaker Chemical Corporation
InventorEdward A. Trauffer
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Abstract
A method is provided for the regeneration of a scavenging compound that has been reacted with hydrogen sulfide. Regeneration is accomplished through the use of calcium oxides and sodium hydroxide. Sodium sulfide is recovered from the regeneration process in a commercially useful form. Calcium oxides are also regenerated in the process, allowing for minimal or no chemical waste.
Claims21
A method comprising
- (a) preparing calcium sulfides by reaction of calcium oxides with a sulfur-containing hetero compound, where the hetero compound is prepared by reaction of hydrogen sulfide with an amine compound;
- and
- (b) reacting the calcium sulfides from step (a) with sodium hydroxide to produce sodium sulfides and regenerate the calcium oxides.
A method for recovering sodium sulfides from a sulfur scavenging reaction mixture comprising, reacting sodium hydroxide with calcium sulfides formed as a product of a reaction between calcium oxides and a sulfur-containing hetero compound, where the hetero compound is formed by reaction of an amine-containing scavenging compound with hydrogen sulfide.
Dependencies are inferred from the claim text.