Elf France

Societe Nationale Elf Aquitaine

Institut Francais Du Pe'trole

Elf-union

Societe Anonyme Elf France

Alain Faure

Paul Maldonado

Christian Bernasconi

Bernard Michel Bossand

Jean-Pierre Durand

Francois Dawans

Bernard Damin

Henri Grangette

Camille Michel Coste

Gerard Antonini

Michel Llinares

Dominique Bouchez

Jean-Luc Volle

Olivier Francois

Jean-Francois Husson

Bernard Thibonnet

Gilles Leygue

Jacques Eppe

A process for inhibiting the deposit of paraffins in crude oils and petroleum fractions incorporating additives of the family of N-substituted succinimide ethers. The additives according to the invention make it possible, on the one hand, to maintain in dispersion the whole range of paraffins improving the flowing properties of crude oils and, on the other, to prevent the deposit of the heavier paraffins on the walls. Therefore, the process is effective during both the storage and the transportation of crude petroleum.

Process for inhibiting the deposit of paraffins in crude oils and

A self-lubricating fuel composition is provided formed from powdered coal, a hydrocarbon fraction, water, a surfactant and a strong electrolyte. This composition develops a lubricating layer between the mechanical parts in relative movement with respect to the fluid and the fluid. Such self lubrication causes a reduction of the friction and consequently of the pressure losses during transport in ducts.

Self-lubricating coal and hydrocarbon fraction based fuel composition

Process for inhibition of microorganisms in liquid hydrocarbons by the introduction of one or more biocidal agents into these hydrocarbons, which also include a small quantity of water and a surface-active compound. This treatment is particularly useful for preserving liquid hydrocarbons such as petrol, kerosene, gasoline or domestic fuel while being stored.

Protection of hydrocarbons against the action of microorganisms

Process of manufacture of solid and liquid organic soil ameliorators characterized in that while stirring at between 20.degree. C. and 70.degree. C. an aqueous suspension of substance rich in organic matter is incorporated to a hydrocarbon based aqueous emulsion, the mixture obtained being, as necessary, filtered in order to remove excess water; Solid and liquid organic ameliorators constituted by an organic matter coated by 0.25 to 25% by weight hydrocarbon; applications for the improvement of soils for agricultural and horticultural cultivation, re-timbering and ballasting of oil tankers.

Organic ameliorators protected by a hydrocarbon structure allowing the

Industrial fuels comprised of mixtures of asphaltenic heavy hydrocarbon fractions and light fractions are provided wherein the flocculation of asphaltenes is minimized by the addition of from 50 to 5000 ppm of an additive composed of a constituent A and/or a constituent B to render the composition homogeneous and stable. Constituent A results from the condensation of a linear N-alkyl polyamine with a cyclic anhydride and constituents B results from the reaction of an ethoxylated amine with a carboxylic acid of C.sub.8 to C.sub.30.

Homogeneous and stable composition of asphaltenic liquid hydrocarbons

Microporous, fertilizing materials or compositions, retaining water and accelerating the germination and growth of plants, characterized in that they are composed of a hydrocarbon base containing asphaltenes modified by an oxidation agent producing a liberation of gas, directly, or indirectly, in combination with at least one mineral compound reacting in acid medium, to which materials or compositions it is possible to add, by simple mixing, appropriate common manures, oligo-elements and fertilizers. Method of preparation of fertilizing materials or compositions, characterized in that a non-acid oxidizing agent is mixed with a molten hydrocarbon base in a proportion of 25 to 50% by weight with 5 to 10% of a mineral compound, the mixture is kept for 5 to 7 hours at 180.degree.-250.degree. C., poured into metal trays, cooled, ground and screened into granules of a diameter ranging from 1 to 3 mm.

Plant fertilizing and growth activating structures and applications

Heavy fuel-oil composition of improved stability under storage conditions, comprising a petroleum residue obtained from a straight run distillation, a vacuum distillation or a viscosity reduction of petroleum materials, a diluent such as a steam-cracking residue, a viscosity reduction gas oil or a mixture thereof, and a minor proportion of a sequenced copolymer formed of two polymeric sequences (A) and (B) wherein sequence (A) is obtained by polymerization of one or more conjugated diolefins such as 1,3-butadiene and isoprene and sequence (B) is obtained by polymerization of acrylonitrile or an alkylacrylonitrile such as methacrylonitrile, said sequenced copolymer having an average molecular weight by number of from 1,000 to 20,000.

Heavy fuel-oil compositions having an improved stability under storage

Growing community of inventors

Saint-Chamond, France

Alain Faure