Elf Antar France

Elf Exploration Production

Total Raffinage Marketing

Alain Rabion

Francois Fajula

Michel Guillerme

François Fajula

Christian Zurdo

Josiane Durrieu

Vasile Hulea

Jean René Bernard

Laurent Fraisse

Jean-René Bernard

Vasile Faculté De Chimie Industrielle Hulea

The invention concerns a method for selectively desulphurizing thiopene compounds contained in hydrocarbons derived from crude oil distillation, whether refined or not, which consists in oxidising the thiophene sulphur atoms into sulphone in the presence of an oxidising agent and in separating said sulphonated compounds from said hydrocarbons. The invention is characterised in that it consists in oxidising the thiophene compounds in a two-phase turbulent medium comprising a hydrocarbon phase and an aqueous phase, in the presence of at least an oxidising agent soluble in at least one of the two phases and of at least a metal catalyst in soluble or dispersed form in a liquid of in solid form, separation and oxidation occurring simultaneously.

Method for desulfurizing thiophene derivatives contained in fuels

Process for using biodegradable drilling muds, characterized in that a able surface sludge which is stable up to about 100&deg; C., with an adjustable filtrate-reducing power of from 2 to 13 cm depending on the amount of filtrate-reducing agent used, and with an electrical stability of greater than or equal to 1000 volts, is introduced into the well at the start of drilling, and in that, when the temperature of the terrain passed through reaches 100&deg; C., the surface sludge is replaced with a bottom sludge which is stable at a temperature above 200&deg; C., the volume of the surface sludge representing from 60 to 80% by volume relative to the total volume of sludge used.

Process for using biodegradable drilling muds

Growing community of inventors

Pau, France

Alain Rabion