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US 4,375,974 AGranted
Detergent compositions, their manufacture and their use as additives for fuels
AssigneesInstitut Francais du Petrole, Societe Elf France
InventorsPaul Maldonado, Choua Cohen, Bernard Sillion
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Abstract
A nitrogen-containing composition, useful as a detergent for gasoline, is obtained by reacting at least one unsaturated anhydride with at least one olefin to convert 20-80% of the anhydride and thereafter reacting the resultant product with a polyamine of the general formula H.sub.2 N--[(--CH.sub.2 --)--.sub.n NH].sub.m R.sup.7 wherein R.sup.7 is a monovalent aliphatic radical of 6-30 carbon atoms, n is an integer from 2 to 5 and m is an integer from 1 to 10.
Claims16
A detergent fuel additive composition prepared by a process comprising the steps of:
- (a) partially condensing a linear or branched C.sub.10-200 olefin with an unsaturated anhydride having the formula ##STR2## wherein R.sup.1 and R.sup.2 are each independently H or C.sub.1-30 hydrocarbyl;
- R.sup.4 and R.sup.5 are each independently H or C.sub.1-5 hydrocarbyl;
- and R.sup.3 and R.sup.6 are each H or together form an endo C.sub.1-2 alkylene bridge;
- wherein 1-2.5 moles of unsaturated anhydride per mole of olefin are heated at a temperature of 140.degree.-250.degree. C., the reaction being interrupted when 20-80% of the anhydride has been converted;
- and
- (b) reacting the resultant complex mixture from step (a), containing residual unconverted anhydride, at 120.degree.-200.degree. C., with a polyamine having the formula H.sub.2 N----CH.sub.2).sub.n NH].sub.m R.sup.7, wherein R.sup.7 is a C.sub.6-30 aliphatic group;
- n is an integer from 2 to 5;
- and m is an integer from 1 to 10;
- wherein 0.9-1.2 mole of said polyamine is used per mole of said unsaturated anhydride introduced into step (a), and removing the resultant water.
6 more elements
Dependencies are inferred from the claim text.