Cations as catalyst in the production of alkane sulfonic acids
AssigneeBASF SE
InventorsTimo OTT, Ingo BIERTUEMPEL
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Abstract
The present invention relates to the use of cations or compounds forming stable cations in the production of alkane sulfonic acids as well as methods to produce methane sulfonic acids employing the cations as catalyst.
Claims20
A process for preparation of alkane sulfonic acids from alkanes and sulfur trioxide, comprising reacting a cation being stable under super acid conditions with alkane to form an alkyl cation, wherein stability means that the cation is able to react with the alkane but does not decompose within 24 h at room temperature (20° C.), and wherein the cation is a halogen cation.
Process for the preparation of alkane sulfonic acids, comprising the steps of
- i) providing sulfur trioxide and an alkane to a reaction chamber,
- ii) setting a pressure of from 1 to 200 bar to the reactor,
- iii) introducing a compound forming in situ a cation into said reactor, wherein the cation is a halogen cation,
- iv) controlling the temperature in the reactor to be at 0° C. to 100° C., and
- v) after the reaction is finished, if necessary, purifying the reaction product.
Process for the preparation of alkane sulfonic acids, comprising the steps of
- i) providing sulfur trioxide and an alkane to a reaction chamber,
- ii) setting a pressure of from 1 to 200 bar to the reactor,
- iii) introducing a cation being stable under super acid conditions into said reactor, wherein stability means that the cation is able to react with the alkane but does not decompose within 24 h at room temperature (20° C.), and wherein the cation is a halogen cation,
- iv) controlling the temperature in the reactor to be at 0° C. to 100° C., and
- v) after the reaction is finished, if necessary, purifying the reaction product.
A mixture comprising an alkane, sulfur trioxide, a cation being able to react with the alkane to form an alkane cation, wherein the cation is a halogen cation, and optionally a solvent.
A mixture comprising an alkane, sulfur trioxide, a compound forming in situ a cation under super acid conditions, said cation being able to react with the alkane to form an alkane cation, wherein the cation is a halogen cation, and optionally a solvent.
Dependencies are inferred from the claim text.