Societe Nationale Elf Aquitaine (production)

Societe Nationale Elf Aquitaine

Institut National De La Sante Et De La Recherche Medicale

Sanofi

Elf Atochem North America, Inc.

Pierre Tozzolino

Gerard Cahiez

Guy Levesque

Jean-Louis Detienne

Blandine Laboue

Pierre-Yves Chavant

Henri Demarne

Jacques Maurice

William L Smith

Dominique Ranceze

Patrice Guesnet

Michel Foure'

Etienne Larribau

Guy Muller

Jean Rosa

Jean-Paul Castaigne

Antioxidant-containing polyolefin composition containing a polyolefin and an antioxidant compound having the general formula: ##STR1## wherein R, R', X and Y are the same or different and are selected from alkyl, phenyl, cyclohexyl, a mono or polyfunctional carboxylic acid ester, hydroxyalkyl, and aralkyl, which groups may be unsubstituted or substituted, linear or branched, or cyclic, and p indicates a degree of polymerization and is at least 2.

Antioxidant polyolefin compositions

Preparation and application of brominated compounds of manganese

Process of preparation of secondary or tertiary alcohols by the action of an organic halide on metallic manganese, in the presence of a carbonyl compound in a solvent followed by hydrolysis; a compound of a metal of Groups II to VIII of the Periodic Classification of the Elements, less electropositive than manganese, is present in the reaction medium.

Manufacture of tertiary and secondary alcohols by the action of an

Process of preparation of alcohols by the reaction of an organic halide with a carbonyl compound in an organic solvent, in the presence of metallic manganese, followed by hydrolysis of the reaction product; the reaction is initiated and activated by an ester present in the reaction medium.

The preparation of ketones by reacting an acylating agent with an organo-manganous compound is catalyzed by a copper compound.

Preparation of ketones by the acylation of organo-manganous compounds

Enolic derivatives of a ketone are prepared by contacting the ketone with a mixed organo-manganous compound.

Process of preparation of enolic compounds and new products obtained

Process of preparation of ketones by the reaction of an organo-metallic compound with a compound carrying a carbonyl, within a solvent, in the presence of a manganous salt as catalyst. The manganous salt is in the form of a double salt of Mn and an alkali metal cation.

Process of preparation of ketones

The present invention relates to cyclic dithiodiacetamides with action inhibiting the malformation or the destruction of the red blood corpuscles due to a genetic modification of the haemoglobin or to parasites, of formula: ##STR1## in which X is a direct bond, an atom of oxygen or of sulfur, a methylene group, an ethylene group or an N--R group, where R is an atom of hydrogen or a lower alkyl group, lower (hydroxy)alkyl group, lower alkanoyl group or a phenyl group; to their possible pharmaceutically acceptable salts; to a process for preparing them from a dithiodiacetate or a mercaptoacetate of lower alkyl by transamination and possible oxidation; and to pharmaceutical compositions containing them as active ingredients, useful for the treatment for example of drepanocytosis, or sickle cell anaemia, of malaria and of babebiosis.

Cyclic dithiodiacetamides and compositions containing them

The froth flotation of a metal sulfide mineral is carried out using a thioamide as the collector in which the thioamide is of the formula ##STR1## R designating C.sub.5 to C.sub.17 alkyls, R' being H or (CH.sub.2).sub.n OR' and n an integer of 1 to 6, while Z is --OR' or ##STR2## where R' means H, CH.sub.3 or C.sub.2 H.sub.5.

Thioamides, their preparation and uses

Mono- and dithioic esters, the alcohol residue of which carries a group including one or more oxygen atoms, are prepared by the action of an oxygen-containing organic compound, carrying an active atom, upon a mixed magnesium salt of a mono- or dithioic acid, ##STR1## where Y is O or S, R is a hydrocarbon group and X is a halogen. The product obtained is treated with an aqueous acid. The new products so synthesized are of the type ##STR2## notably those where R' is a chain, --(CH.sub.2).sub.n --, with n=1 to 12, Z being --OH or --COOH and are used as a collector in the flotation of minerals.

Mono- and dithioic esters, their preparation and uses

Process of enrichment of minerals by flotation by means of a collector comprising a thio-compound, the thio-compound being a straight or branched dialkyl or dialkenyl polysulphide.

Enrichment of minerals by flotation and collector agents employed for

Process for the preparation of an organic dithio-acid by reaction of the corresponding dithio-ester and an alkali metal or alkaline earth metal hydrosulphide in a solvent in the presence of an excess of H.sub.2 S and treatment with a mineral acid. The dithioic acids so obtained can be utilized as collectors for the flotation of minerals.

Process of production of organic dithio-acids and their application

Process of production of organic dithio-acids

Process using collectors for the flotation of minerals which allow the separation or enrichment of certain minerals, even at pH values around 7. These collectors are organic sulphides of the type R--S--R', in which the two groups R and R' are different and at least one of them preferably carries a substituent including oxygen or sulphur. The collectors are desirably used in a proportion of 10-100 ppm in relation to the weight of the mineral subject to flotation.

Process for the flotation of sulfide ores

New chemical products formed by sulphates of alkyl and sulphonium, the latter having on its sulphur atom an alkyl containing 1 to 6 carbon atoms, a second alkyl containing at least 6 carbon atoms, and a 2-hydroxy-ethyl group. These products are prepared by reacting a dialkyl sulphate with a sulphide of an alkyl containing at least 6 carbon atoms and of --CH.sub.2 CH.sub.2 OH. The sulphonium compounds of this type, and particularly the compound in which the heavy alkyl is a n-octyl, are useful as fungicides.

Growing community of inventors

Serres-Morlaas, France

Pierre Tozzolino