Abstract: The present invention relates to a composition comprising: a) at least one primary, secondary or tertiary amine and b) at least one agent which masks the odor of said at least one amine, said at least one odor-masking agent comprising at least one ether (b1), optionally, but preferably, at least one terpene and/or one terpenoid (b2) and optionally, but preferably, at least one oxime (b3). The invention also relates to the use of an odor-masking agent in order to mask the odor of at least one amine.

Abstract: The present invention relates to a composition comprising: a) at least one primary, secondary or tertiary amine and b) at least one agent which masks the odour of said at least one amine, said at least one odour-masking agent comprising at least one ether (b1), optionally, but preferably, at least one terpene and/or one terpenoid (b2) and optionally, but preferably, at least one oxime (b3). The invention also relates to the use of an odour-masking agent in order to mask the odour of at least one amine.

Abstract: One subject of the invention is a dimethyl disulphide in which the content of biocarbon is at least 1%. Another subject of the invention is processes for preparing this dimethyl disulphide. Yet another subject of the invention is the use of such a dimethyl disulphide for the manufacture of methanesulphonic acid.

Abstract: One subject of the invention is a dimethyl disulphide in which the content of biocarbon is at least 1%. Another subject of the invention is processes for preparing this dimethyl disulphide. Yet another subject of the invention is the use of such a dimethyl disulphide for the manufacture of methanesulphonic acid.

Abstract: A process is disclosed for the preparation of primary mercaptans by reacting hydrogen sulfide with an alpha-olefin in the presence of a reaction initiating amount of a borane represented by the formula R.sub.2 BH or R.sub.3 B where R is a linear or cyclic aliphatic or aryl group.

Abstract: A method is disclosed for the selective preparation of 3-aminomethyl-3,5,5-trialkylcyclohexylamine by preparing dried 3-cyano-3,5,5-trialkylcyclohexylimine from the reaction of 3-cyano-3,5,5-trialkylcyclohexanone with ammonia in the presence of a drying agent in an amount at least sufficient to retain the water present or generated during the imine-forming reaction, and hydrogenating the dried 3-cyano-3,5,5-trialkylcyclohexylimine in the presence of a cobalt-containing catalyst at elevated temperature and pressure.

Abstract: The process for the preparation of aliphatic amines of general formula R-NH-R' in which R is an aliphatic residue with 10 to 22 carbon atoms and R' is an aliphatic residue with 1 to 8 carbon atoms, comprising reacting under a hydrogen pressure an alkanol with a monoalkylamine in the presence of a catalytic system constituted by a supported nickel catalyst and an alkaline carbonate, more specifically potassium carbonate.

Abstract: The invention relates to the manufacture of thiophene by catalytic dehydrogenation of tetrahydrothiophene.Ruthenium sulphide, optionally mixed with sulphides of one or more other transition metals is employed as bulk or supported catalyst.

Abstract: The process of making N,N-dimethyl-N-alkylamines containing less than 1% of alkanols by hydrogenation of N,N-dimethylalkylamines on a catalyst of the copper chromite type containing an amount of manganese oxide effective to keep the alkanol level below 1%.

Abstract: A process is provided for the preparation of a catalyst which is particualrly active and selective in the oxidative conversion of methane into higher hydrocarbons and especially into C.sub.2.sup.+ hydrocarbons.In the process, an aqueous phase containing in solution cations of at least one metal of the lanthanide group and cations of at least one alkaline-earth metal, is brought into contact with a sufficient quantity of a source of carbonate ions or hydroxide ions to form a coprecipitate of carbonates and/or of hydroxycarbonates of the metals, the pH of the resulting reaction medium is brought to a value higher than 8, a coprecipitate is separated from the reaction medium, subjected to a washing operation, then to a drying operation and the washed and dried coprecipitate is subjected to calcination.

Abstract: A process for the production of a primary alkylamine or a dimethylalkylamine in a single stage comprising heating a reaction medium comprising a long chain carboxylic acid ester with ammonia and hydrogen in the presence of a mixed catalyst of the oxide-metal type; said oxide being titanium dioxide and the metal being a combination of copper and cobalt or of copper, chromium, and cobalt; and the mixed oxide-metal catalyst.

Abstract: In a process for the production of methyl mercaptan by heating a gas comprising carbon monoxide and/or carbon dioxide, hydrogen sulphide and hydrogen in contact with a catalyst based upon a heavy metal sulphide, with recycling of the gas fraction which has not reacted, the gas to be recycled has removed from it water which it contains following the reaction in contact with the catalyst.