Rhodia Operations

Rhodia Chimie

Institut Francais Du Pe'trole

Sylvie Touzet

Bruno Langlois

Evelyne Prat

Jean-Yves Chane-Ching

Pascal Herve

Christine Dalmazzone

Annie Audibert-Hayet

Roland Durand

Valérie Billebaud

Emma Hills

Jean-Emille Zanetto

Valérie Legros

Florence Deschaseaux

The invention relates to a treatment that can be used to remove a coating and/or stain from a construction material, such as anti-graffiti treatment. The inventive treatment uses a beta-dicarbonyl product.

Treatment enabling the removal of a coating and/or stain from a construction material

The invention relates to the use, in anti-graffiti treatments, and preferably in graffiti-suppressing treatments, of a particular dicarboxylic acid diester having improved treatment efficiency.

Anti-graffiti treatment

Oilfields are stimulated by injecting an inflow stream of a fluid into an oil producing well linked to the oilfield, displacing the oil and recovering an outflow stream of fluid comprising the oil, wherein at least two streams are injected into at least two production zones of an oil well or are injected into at least two different oil producing wells from which at least two outflow streams from the two zones or wells are combined before recovering, with a scale inhibitor having detectable moieties being introduced into the oilfield(s) and/or into the fluid, and wherein two different scale inhibitors are used, dedicated to the two zones or wells, said different scale inhibitors having different detectable moieties that can be distinguished by analysis.

Stimulating oilfields using different scale-inhibitors

A temperature-stable, non eco-toxic oil-base well fluid that is particularly suitable for high pressure/high temperature drilling comprises an emulsification system comprising at least one superamide that may or may not be polyalkoxylated, optionally associated with a non-ionic co-surfactant. The oil-base well fluid comprising such a system can be used at temperatures of up to about 200&#xb0; C. due to the production of highly temperature-stable reverse emulsions.

Oil-based drilling fluid comprising a temperature-stable and non-polluting emulsifying system

Aqueous suspension based on alkaline aluminium polysulphate, preparation method and use in the field of building materials

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Antony, France

Sylvie Touzet