Abstract:
The present invention refers to a method for the production of haloalkanesulfonic acid, in which SO 3 and an haloalkaneare contacted with each other in the presence of a solvent, said solvent does constitute a superacid and the combination of said solvent with one or more of the reactants also gives rise to a superacid.
Abstract:
The present invention relates to a process for the direct synthesis of alkanesulfonic acids, particularly methanesulfonic acid, from sulfur trioxide and alkanes employing heterogeneous catalysts, particularly transition metals such as rhodium. Particularly the synthesis is carried out in a tube furnace and the resultant product is isolated by quenching the resultant gas mixture in aqueous concentrated sulfuric acid at room temperature.
Abstract:
A compound of the formula (I) ALK-SO 2 -O-O-SO 2 OX, wherein ALK is a branched or unbranched alkyl group, especially a methyl, ethyl, propyl, butyl, isopropyl, isobutyl group, or a higher alkyl group, and X = hydrogen, zinc, aluminium, an alkali or alkaline earth metal.
Abstract:
The present invention relates to novel uses of stable inorganic peroxoacids as catalysts in the preparation of alkanesulfonic acids from alkanes and sulfur tri- oxide, methods for the production of alkanesulfonic acids employing said cata- lysts as well as reaction mixtures comprising said catalysts. The invention par- ticularly relates to the production of methanesulfonic acid from methane and sulfur trioxide employing stable inorganic peroxoacids as catalysts.
Abstract:
The present invention relates to a process for preparing haloalkanesulfonic acids from sulfur trioxide and a haloalkane, particularly to a process for preparing trifluoromethane sulfonic acid from sulfur trioxide and trifluoromethane.
Abstract:
The present invention relates to methods for the production of alkane sulfonic acids, especially methane sulfonic acid, from alkane, especially methane, in which a carbocation, particularly a carbenium ion, is formed, as well as to the use of carbocations, particularly carbenium ions, for the production of alkane sulfonic acids, especially methane sulfonic acid.
Abstract:
The present invention refers to a method to reduce halogens into halides wherein hydrogenperoxides, sulfites, bisulfites, pyrosulfites, precursors thereof are used as reducing agents.
Abstract:
The present invention relates to an alkane-sulfonation process using alkane and sulfur trioxide, especially pure sulfur trioxide (100%) under solvent-free conditions in the presence of an initiator. It further relates to the use of a precursor which forms "in-situ" an initiator for manufacturing of alkanesulfonic acids, especially methanesulfonic acids.
Abstract:
The present application refers to a method for reducing the SO 3 concentration in a mixture comprising SO 3 and a sulfonic acid R-SO 3 H, wherein R represents a moiety comprising at least 1 C-atom except for CH 3 , the method comprising: i. providing a mixture comprising a sulfonic acid R-SO 3 H and SO 3 , ii. determining the amount of an additive necessary to reduce the concentration of SO 3 in the mixture by forming a reaction product between the additive and SO 3 , iii. introducing said predetermined amount of the additive into the mixture; iv. optionally repeating steps ii. and iii., wherein the determination of the amount of additive necessary to reduce the amount of SO 3 in the mixture is performed by measuring conductivity and/or density of the reaction mixture, and wherein the additive comprises water.
Abstract:
The present invention refers to a method for the production of haloalkane sulfonic acid, in which SO 3 and an haloalkane are contacted with each other in the presence of a solvent, said solvent does not constitute a superacid and the combination of said solvent with one or more of the reactants also does not give rise to a superacid.