Societe Nationale Elf Aquitaine

Entreprise De Recherches Et D'activites Petrolieres Elf

Camille Michel Coste

Auguste Andre Commeyras

Jean Rene Bernard

Hubert Wilhelm Knoche

Daniel Elie Brunel

Jean Joseph Itier

Paul Maldonado

Sylvain Mauran

Alain Faure

Georges Crozat

Jean-Francois Husson

The invention has for its object an improved method of performing gas-solid reactions. The method is characterized in that there is added expanded graphite of a volumetric mass between 0.001 and 0.02 g/cm.sup.3 to the reactive medium and in such quantity that it constitutes from 1 to 60% of the quantity of reactant solid present in the medium. The method makes it possible to improve the rate of the gas-solid reactions, as well as their stoichiometric characteristics, particularly in the case of reversible reactions.

Gaseous-solid reaction

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

A catalytic composition is employed for the isomerization of paraffins and the alkylation of paraffins with olefins. The composition is constituted by a mixture of Lewis acid corresponding to the formula MXm where:

Catalytic composition for the isomerization and alkylation of

The composition is constituted by a mixture of Lewis acid corresponding to the formula MXm where:

Catalytic composition for the conversion of hydrocarbons

Growing community of inventors

Amelie-les-Bains, France

Camille Michel Coste