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1. (WO2019043339) SULFONIC ACID PREPARATION METHOD
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Pub. No.: WO/2019/043339 International Application No.: PCT/FR2018/052127
Publication Date: 07.03.2019 International Filing Date: 30.08.2018
IPC:
C07C 303/42 (2006.01) ,C07C 309/04 (2006.01) ,C23F 11/16 (2006.01)
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
303
Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
42
Separation; Purification; Stabilisation; Use of additives
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
309
Sulfonic acids; Halides, esters, or anhydrides thereof
01
Sulfonic acids
02
having sulfo groups bound to acyclic carbon atoms
03
of an acyclic saturated carbon skeleton
04
containing only one sulfo group
C CHEMISTRY; METALLURGY
23
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
F
NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACES; INHIBITING CORROSION OF METALLIC MATERIAL; INHIBITING INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25247
11
Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
08
in other liquids
10
using organic inhibitors
16
Sulfur-containing compounds
Applicants:
ARKEMA FRANCE [FR/FR]; 420 rue d'Estienne d'Orves 92700 COLOMBES, FR
Inventors:
LAFFITTE, Jean-Alex; FR
MONGUILLON, Bernard; FR
Agent:
STEFENEL, Alexandra; FR
Priority Data:
175809901.09.2017FR
Title (EN) SULFONIC ACID PREPARATION METHOD
(FR) PROCEDE DE PREPARATION D'ACIDE SULFONIQUE
Abstract:
(EN) The present invention relates to a method for preparing a sulfonic acid that is slightly corrosive, or even non-corrosive, with respect to stainless steels, said method comprising at least the steps of adding at least one nitrite to a sulfonic acid, curing under agitation with sparging of the mixture and recuperation of the low-corrosion sulfonic acid obtained. The invention also concerns the low-corrosion sulfonic acid obtained according to the method of the invention, as well as the use thereof as low-corrosion sulfonic acid.
(FR) La présente invention a pour objet un procédé de préparation d'un acide sulfonique peu, voire non, corrosif vis-à-vis des aciers inoxydables, ledit procédé comprenant au moins les étapes d'ajout d'au moins un nitrite dans un acide sulfonique, de cuisson sous agitation avec barbotage du mélange et de récupération de l'acide sulfonique faible corrosion obtenu. L'invention concerne également l'acide sulfonique faible corrosion obtenu selon le procédé de l'invention, ainsi que son utilisation en tant qu'acide sulfonique faible corrosion.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: French (FR)
Filing Language: French (FR)