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US 10,894,766 B2Granted
Process for the production of alkanesulfonic acids
AssigneeBASF SE
InventorsJan Spielmann, Juergen Wortmann, Frieder Borgmeier, Michael Zeilinger, Rosario Mazarro Berdonces, Bjoern Kaibel
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Abstract
The present invention deals with a process for the production of alkanesulfonic acids, in particular methanesulfonic acid, and a method of purification of the raw products.
Claims24
A process for preparing an alkanesulfonic acid, the process comprising:
- reacting sulfur trioxide and an alkane to obtain a raw alkane sulfonic acid;
- and
- purifying the raw alkane sulfonic acid in a distillation process comprising at least two steps, to obtain a purified alkanesulfonic acid,
- wherein a ratio of an inner column diameter in a sump and an inner column diameter of the column directly above the sump for each column in the distillation process is in the range from 0.20 to 0.99.
1 more element
A process for preparing an alkanesulfonic acid, the process comprising:
- reacting sulfur trioxide and an alkane to obtain a raw alkane sulfonic acid;
- and
- purifying the raw alkane sulfonic acid in a distillation process comprising at least two steps, to obtain a purified alkanesulfonic acid,
- wherein the distillation process comprises stripping of a distillation mixture with an inert gas in at least one of the distillation steps.
1 more element
A process for preparing an alkanesulfonic acid, the process comprising:
- reacting sulfur trioxide and an alkane to obtain a raw alkane sulfonic acid;
- and
- purifying the raw alkane sulfonic acid in a distillation process comprising at least two steps, to obtain a purified alkanesulfonic acid,
- wherein the process is water-free.
1 more element
Dependencies are inferred from the claim text.