# US 4,396,399 A · Detergent and corrosion inhibitor and motor fuel composition containing same

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- Number: US 4,396,399 A
- Document ID: US4396399A
- Status: Granted
- Kind: A
- Application number: 06/278,816
- Filed: 1981-06-29
- Granted: 1983-08-02
- Earliest claimed: 1981-06-29
- Assignees: Texaco Inc.
- Inventors: Benjamin J. Kaufman; Harry Chafetz
- Web page: https://patentgrep.com/patent/US4396399A

## CPC

- C07D 493/10: Spiro-condensed systems
- C10L 1/221: {compounds of uncertain formula; reaction products where mixtures of compounds are obtained}
- C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)
- C10L: FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS

## Abstract

As a detergent and corrosion inhibiting fuel additive, the product resulting from the condensation reaction of a C.sub.9 to C.sub.30 alkenylsuccinic anhydride in the presence of a base to form an intermediate spirodilactone followed by the reaction of the intermediate spirodilactone with diethylenetriamine and a fuel composition containing same.

## Claims

### Claim 1

A motor fuel composition comprising a base mixture of hydrocarbons boiling in the gasoline boiling range and an effective amount of a detergent and corrosion inhibiting reaction product which is obtained by condensing in the presence of a basic catalyst at temperatures ranging from about 180.degree. C. to about 270.degree. C. an alkenyl succinic anhydride of the formula: ##STR4## wherein R' is an alkenyl radical having from about 9 to about 30 carbon atoms, to form a spirodilactone intermediate followed by the reaction of the spirodilactone intermediate with diethylenetriamine at from about 80.degree. C. to about 140.degree. C. in which the ratio of diethylenetriamine to spirodilactone intermediate ranges from about 12:1 to about 2:1.

### Claim 2

A motor fuel composition comprising a base of about 90% of a mixture of hydrocarbons boiling in the gasoline boiling range, about 10% ethyl alcohol, and an effective amount of a detergent and corrosion inhibiting reaction product which is obtained by condensing in the presence of a basic catalyst at temperatures ranging from about 180.degree. to about 270.degree. C. an alkenylsuccinic anhydride of the formula: ##STR5## wherein R' is an alkenyl radical having from about 9 to about 30 carbon atoms, to form an intermediate spirodilactone followed by reacting the intermediate spirodilactone with diethylenetriamine at from about 80.degree. C. to about 140.degree. C. where the ratio of spirodilactone to diethylenetriamine ranges from about 12:1 to about 2:1.

### Claim 3 (depends on 1, 2)

A motor fuel composition according to claim 1 or 2, wherein said anhydride has an average molecular weight of 100 to 450.

### Claim 4 (depends on 1, 2)

A motor fuel composition according to claim 1 or 2 wherein said anhydride has an average molecular weight of 200 to 350.

### Claim 5 (depends on 1, 2)

A motor fuel composition according to claim 1 or 2, wherein said basic catalyst is potassium fluoride.

### Claim 6 (depends on 1, 2)

A motor fuel composition according to claim 1 or 2, wherein said basic catalyst is potassium carbonate.

### Claim 7 (depends on 1, 2)

A motor fuel composition according to claim 1 or 2, wherein said basic catalyst is potassium hydroxide.

### Claim 8 (depends on 1, 2)

A motor fuel composition according to claim 1 or 2 containing from 0.0002 to 0.2 weight percent of said detergent and corrosion inhibiting reaction product.

### Claim 9 (depends on 1, 2)

A motor fuel composition according to claim 1 or 2 containing from 0.0035 to 0.02 weight percent of said detergent and corrosion inhibiting reaction product.

### Claim 10 (depends on 1, 2)

A motor fuel composition according to claim 1 or claim 2 wherein the alkenylsuccinic anhydride is condensed at temperatures ranging from about 200.degree. C. to about 250.degree. C.

### Claim 11 (depends on 1, 2)

A motor fuel composition according to claim 1 or claim 2 wherein the spirodilactone intermediate is reacted with diethylenetriamine at from about 90.degree. to about 110.degree. C.

### Claim 12 (depends on 1, 2)

A motor fuel composition according to claim 1 or claim 2 wherein the spirodilactone intermediate is reacted with diethylenetriamine at about 100.degree. C.