Process for producing sulfonic acid
AssigneeArkema France
InventorsJean-Alex LAFFITTE, Bernard MONGUILLON
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Abstract
The subject of the present invention is a process for producing a sulfonic acid which is sparingly corrosive, or even non-corrosive, with respect to stainless steels, said process comprising at least the steps of adding at least one nitrite to a sulfonic acid, curing, with stirring, with sparging of the mixture and recovering the low-corrosion sulfonic acid obtained. The invention also relates to the low-corrosion sulfonic acid obtained according to the process of the invention, and also to the use thereof as low-corrosion sulfonic acid.
Claims8
Process for producing a low-corrosion sulfonic acid, comprising at least the following steps:
- a) adding at least one nitrite to a conventional sulfonic acid;
- b) curing the mixture obtained in step a) at a temperature between 0° C. and 100° C., and preferably between 0° C. and 80° C., more particularly between 10° C. and 60° C., even more particularly between 10° C. and 50° C., for a period of between a few seconds and a few hours, preferably between 1 min and 4 h, more particularly between 10 min and 2 h, even more particularly between 10 min and 1 h;
- c) recovering the low-corrosion sulfonic acid,
Dependencies are inferred from the claim text.