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US 4,394,324 AGranted
Stable antimony organophosphorodithioates
AssigneePhillips Petroleum Company
InventorsHarold W. Mark, Brent J. Bertus, John S. Roberts
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Abstract
Antimony passivators for cracking catalysts are rendered more stable by employing excess alcohol during their preparation.
Claims9
Stabilized antimony hydrocarbylphosphorodithioate salts produced by the steps of:
- (1) reacting a molar excess of a hydroxyl component with one or more substances containing phosphorus and sulfur, and
- (2) reacting the product of step (1) with an antimony-containing compound.
A process of producing stabilized antimony salts of hydrocarbylphorodithioic acid comprising:
- (1) reacting a molar excess of at least one alcohol with at least one substance containing phosphorus and sulfur, to produce an acid intermediate, and
- (2) reacting the intermediate formed in step (1) with an antimony-containing compound.
Dependencies are inferred from the claim text.