PROCESS FOR PRODUCING SULFONIC ACID

• Main Authors: MONGUILLON, Bernard, LAFFITTE, Jean-Alex
• Format: Patent
• Language: English
• Published: 04.05.2023
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25; NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; ORGANIC CHEMISTRY

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. Figure: None