Abstract: A combustion improving additive for liquid fuel consisting essentially of an iron complex soluble in organic media, formed by reacting a sulfonic acid with ferric hydroxide in such proportions as to obtain a ratio of the number of acid gram-equivalents of the sulfonic acid to the number of gram-atoms of the iron in the range from 1/6 to 1/12, said reaction being conducted in the presence of a light aromatic hydrocarbon or a light halogenated aliphatic hydrocarbon having a boiling point from 80.degree. to 230.degree. C. and of an organic liquid containing oxygen, at least partially miscible with water and substantially miscible with hydrocarbons, said complex being obtained in the organic phase of the reaction product.

Abstract: Process for polymerizing olefinic hydrocarbons at a temperature from 0.degree. to 90.degree. C., preferably from 20.degree. to 80.degree. C. in the presence of a catalyst containing aluminum oxide and, per part by weight thereof, boron oxide in a proportion of 0.01 to 1, preferably 0.07 to 0.15 part by weight and halogen in a proportion of 0.5 to 20%, preferably 4 to 12%, said catalyst resulting from the reaction of an aluminum compound of formula AlX.sub.y R.sub.(3-y) where X is halogen, R is a hydrocarbon radical and y is selected from 1, 3/2, 2 and 3, with a carrier containing aluminum oxide and boron oxide in a proportion to aluminum oxide from 1 to 100%.

Abstract: New superbasic detergent additives are manufactured in two steps. The first step comprises the reaction of a sulfonic acid with an excess of oxide or hydroxide of lithium or group II A metal. The second step consists of carbonating the oxide or hydroxide in excess. The manufacture is conducted in the presence of a polyalkenylsuccinimide-amine salt.

Abstract: This invention relates to gasoline compositions containing additives which are reaction products of a maleic anhydride of the formula ##EQU1## with a linear polyamine of the formulaH.sub.2 N--(CH.sub.2).sub.n -- NH].sub.m R'in which R.sub.1 and R.sub.2 are selected from the group consisting of a hydrogen atom and a monovalent hydrocarbon radical of 1 - 30 carbon atoms, R' is a monovalent aliphatic hydrocarbon radical having 6 - 30 carbon atoms, n is an integer from 3 to 10 and m is an integer from 1 to 10.