Process for producing sulfonic acid
US11447450B2 · kind B2 · utility
0Cited by
7References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2018 |
| Grant date | Sep 20, 2022 |
| Priority date | — |
| Expiry date | Aug 30, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F11/181
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.