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1. WO2021023582 - RECOVERY OF WATER-FREE METHANESULFONIC ACID FROM THE BOTTOM STREAM OF A DISTILLATION COLUMN

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Publication Number WO/2021/023582
Publication Date 11.02.2021
International Application No. PCT/EP2020/071271
International Filing Date 28.07.2020
IPC
C07C 303/44 2006.1
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
303Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
42Separation; Purification; Stabilisation; Use of additives
44Separation; Purification
C07C 309/04 2006.1
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
309Sulfonic acids; Halides, esters, or anhydrides thereof
01Sulfonic acids
02having sulfo groups bound to acyclic carbon atoms
03of an acyclic saturated carbon skeleton
04containing only one sulfo group
CPC
C07C 303/44
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
303Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
42Separation; Purification; Stabilisation; Use of additives
44Separation; Purification
Applicants
  • BASF SE [DE]/[DE]
Inventors
  • STAVROU, Marina-Eleni
  • BECHTEL, Marcus
  • MAZARRO BERDONCES, Rosario
  • PIEPENBREIER, Frank
  • CHAN, Chee, Jian
  • KAIBEL, Bjoern
  • KEMPTER, Andreas
Agents
  • BASF IP ASSOCIATION
Priority Data
19190621.307.08.2019EP
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) RECOVERY OF WATER-FREE METHANESULFONIC ACID FROM THE BOTTOM STREAM OF A DISTILLATION COLUMN
(FR) RÉCUPÉRATION D'ACIDE MÉTHANE SULFONIQUE ANHYDRE À PARTIR DE L'EFFLUENT DE FOND D'UNE COLONNE DE DISTILLATION
Abstract
(EN) Process for separating anhydrous methanesulfonic acid from a reaction mixture comprising methanesulfonic acid and sulfuric acid by distillation with at least three functional steps and the use of said methanesulfonic acid.
(FR) L'invention concerne un procédé de séparation d'acide méthane sulfonique anhydre à partir d'un mélange réactionnel comprenant de l'acide méthane sulfonique et de l'acide sulfurique par distillation en au moins trois étapes fonctionnelles et l'utilisation dudit acide méthane sulfonique.
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