Elf Atochem S.a.

Elf Aquitaine Production

Elf Aquitaine

Remy Teissier

Jacques Kervennal

Didier Tichit

Francois Fajula

Eric Jorda

Francesco S Di Renzo

Christophe Calais

Maurice Fournier

Francedillaois Figueras

Alain Tuel

Sylvie Gomez

The present invention relates to a catalyst based on titanosilicalites having a content by weight of alkali metal or metals of between 0.05 and 2%. The subject of the invention is more particularly a process for producing N,N-disubstituted hydroxylamine from hydrogen peroxide and the corresponding disubstituted amine.

Catalyst based on titanosilicalites and process for producing

Method for preparing lattice-inserted titanium zeolites, and use thereof

The invention relates to the use of compounds of formula:

Preparation of .beta.-hydroxycarbonyl and/or .alpha.,.beta.-unsaturated

The present invention relates to a process for obtaining .beta.-hydroxy carbonyl compounds and/or .alpha.,.beta.-unsaturated carbonyl compounds, characterized in that at least one aldehyde or one ketone is brought into contact with a solid catalyst of general formula (I):

Process for obtaining .beta.-hydroxy and/or .alpha.,.beta.-unsaturated

The present invention relates to a process for obtaining isophorone from acetone, characterized in that the operation is carried out (i) in liquid phase in the presence of a magnesium aluminum double oxide of formula Mg.sub.1-x Al.sub.x O.sub.1+x or (ii) either in gaseous or liquid phase in the presence of a catalyst of general formula (I):

Process for obtaining isophorone

The subject of the present invention is a new process for obtaining nitrones. It more particularly relates to a process for obtaining N-monosubstituted hydroxylamine comprising a stage in which a nitrone is formed from a secondary amine in the presence of an oxidizing agent and of at least one C.dbd.O containing species chosen from the group consisting of carbon dioxide, hydrogencarbonates and carbonates.

Process for obtaining N-monosubstituted hydroxylamine

The aldolization is characterized by the use of a solid basic catalyst which has the following general formula

Selective aldolization of acetone to diacetone alcohol by a solid basic

The subject of the present invention is a process for the preparation of zeolites in which some of the silicon atoms are replaced by titanium atoms, by hydrothermal reaction of a silicon source with titanium tetrafluoride in the presence of a structuring agent.

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Francheville, France

Remy Teissier