# US 4,394,324 A · Stable antimony organophosphorodithioates

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- Number: US 4,394,324 A
- Document ID: US4394324A
- Status: Granted
- Kind: A
- Application number: 06/264,526
- Filed: 1981-05-18
- Granted: 1983-07-19
- Earliest claimed: 1981-05-18
- Assignees: Phillips Petroleum Company
- Inventors: Harold W. Mark; Brent J. Bertus; John S. Roberts
- Web page: https://patentgrep.com/patent/US4394324A

## CPC

- C07F 9/165: Esters of thiophosphoric acids
- Y10S 502/521: Metal contaminant passivation
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

Antimony passivators for cracking catalysts are rendered more stable by employing excess alcohol during their preparation.

## Claims

### Claim 1

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.

### Claim 2 (depends on 1)

The salts of claim 1 wherein the reactants are selected from C.sub.1-12, monoalcohols, phosphorus sulfides, and antimony oxides or hydroxides.

### Claim 3 (depends on 1)

The salts of claim 1 wherein the reactants are n-propyl alcohol, diphosphorus pentasulfide, and antimony oxide.

### Claim 4

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.

### Claim 5 (depends on 4)

The process of claim 4 wherein step (2) is a condensation reaction.

### Claim 6 (depends on 5)

The process of claim 5 wherein water is removed during or after step (2).

### Claim 7 (depends on 4)

The process of claim 4 wherein the reactants are selected from C.sub.1-12 monoalcohols, phosphorus sulfides, and antimony oxides or hydroxides.

### Claim 8 (depends on 4)

The process of claim 4 wherein the reactants are n-propyl alcohol, diphosphorus pentasulfide, and antimony oxide.

### Claim 9 (depends on 6)

The process of claim 6 wherein the reactants are n-propyl alcohol, diphosphorus pentasulfide, and antimony oxide.