A process for preparing alkanesulfonic acids from sulfur trioxide and an alkane, wherein sulfur trioxide, the alkane and dialkylsulfonoyi peroxide (DASP) react as components, characterized in that the following steps are performed: a) sulfur trioxide is charged in a high-pressure reactor in a condensed phase; b) a temperature of at least 25 C. is set; c) the gaseous alkane is introduced to the high-pressure reactor until a pressure of at least 10 bar is reached; d) dialkylsulfonoyi peroxide (DASP) is added; and e) after a duration of at least 5 hours, the produced alkanesulfonic acid is withdrawn.

The invention relates to a method for producing an oxysulphidic and fluorinated derivative in the form of a salt of formula (II) Ea-SO.sup.Q.sup.+ (II) comprising providing an ionic liquid compound of formula (I) in the liquid state Ea-SOO.sup.Cr (II)Ea representing the fluorine atom or a group having between 1 and 10 carbon atoms selected from fluoroalkyls, perfluoroalkyls and fluoroalkenyls; andQ.sup.+ representing an onium cation, with a sulphur oxide, said ionic liquid compound of formula (I) representing at least 50 wt. % of the initial liquid reactive medium.

The invention relates to a method for producing an oxysulphidic and fluorinated derivative in the form of a salt of formula (II) Ea-SO.sup.Q.sup.+ (II) comprising providing an ionic liquid compound of formula (I) in the liquid state Ea-SOO.sup.Cr (II)Ea representing the fluorine atom or a group having between 1 and 10 carbon atoms selected from fluoroalkyls, perfluoroalkyls and fluoroalkenyls; andQ.sup.+ representing an onium cation, with a sulphur oxide, said ionic liquid compound of formula (I) representing at least 50 wt. % of the initial liquid reactive medium.

The invention concerns a method for preparing an oxysulphide and fluorinated derivative, said method comprising the reacting, in the presence of an organic solvent, of: i) at least one compound of formula Ea-COOR (I), in which Ea represents the fluorine atom or a group having 1 to 10 carbon atoms chosen from fluoroalkyls, perfluoroalkyls and fluoroalkenyls and R represents hydrogen, a monovalent cation or an alkyl group, and ii) a sulphur oxide, said method being such that the initial molar ratio (sulphur oxide/compound of formula (I)) is less than 0.4 and the concentration of sulphur oxide dissolved in the reaction medium is kept constant for the entire duration of the reaction to a value of between 0.2% and 3% by weight by means of continually adding said sulphur oxide to the reaction medium.

The present application relates to a sulfonate-based compound and a method for preparing the same.

A compound for use as an antimicrobial having a formula (A). ##STR00001##

It is an object of the present invention to provide a sulfonic acid group-containing polymer and a sulfonic acid group-containing aromatic compound, which have excellent proton conductivity even under the low humidification condition, are excellent in mechanical strength and chemical stability and, moreover, can attain high output and excellent physical durability when processed into a solid polymer fuel cell, as well as a polymer electrolyte material, a polymer electrolyte molded product and a solid polymer fuel cell respectively using the same. The sulfonic acid group-containing polymer of the present invention is a sulfonic acid group-containing polymer comprising a constituent unit containing a sulfonic acid group (A1), and a constituent unit not containing a sulfonic acid group (A2), wherein the polymer contains a constituent unit having a specified structure as at least one constituent unit containing a sulfonic acid group (A1) at 25 mol % or more based on a sum of the constituent unit containing a sulfonic acid group (A1). Further, the polymer electrolyte material, polymer electrolyte molded product and solid polymer fuel cell of the present invention are constituted using such a sulfonic acid group-containing polymer.

It is an object of the present invention to provide a sulfonic acid group-containing polymer and a sulfonic acid group-containing aromatic compound, which have excellent proton conductivity even under the low humidification condition, are excellent in mechanical strength and chemical stability and, moreover, can attain high output and excellent physical durability when processed into a solid polymer fuel cell, as well as a polymer electrolyte material, a polymer electrolyte molded product and a solid polymer fuel cell respectively using the same. The sulfonic acid group-containing polymer of the present invention is a sulfonic acid group-containing polymer comprising a constituent unit containing a sulfonic acid group (A1), and a constituent unit not containing a sulfonic acid group (A2), wherein the polymer contains a constituent unit having a specified structure as at least one constituent unit containing a sulfonic acid group (A1) at 25 mol % or more based on a sum of the constituent unit containing a sulfonic acid group (A1). Further, the polymer electrolyte material, polymer electrolyte molded product and solid polymer fuel cell of the present invention are constituted using such a sulfonic acid group-containing polymer.

The invention relates to a process for preparing an internal olefin sulfonate, comprising sulfonating an internal olefin into sulfonated internal olefin followed by contacting sulfonated internal olefin with a base containing solution, wherein the molar ratio of internal olefin to solvent for the base is higher than 0.06. Further, the invention relates to an internal olefin sulfonate obtainable by said process.

The present invention is directed to methods for preparing a fluorosulfonate ester or a salt thereof, through a reaction of a dissolved sulfonyl fluoride (R.sub.FSO.sub.2F) with alkoxide anion (RO.sup.) optionally in the presence of an aprotic base (B), where R.sub.F is fluorine or a C.sub.1-C.sub.8 perfluoroalkyl group, and R is a primary alkyl or alkoxyalkyl. Alkoxide anion (RO.sup.) can be generated from a precursor such as an alcohol or silyl ester.