US 12,168,641 B2
Process for the preparation of haloalkanesulfonic acids from sulfur trioxide and a haloalkane at superacidic conditions
Timo Ott, Duisburg (DE)
Assigned to GRILLO CHEMICALS GMBH, Duisburg (DE)
Appl. No. 17/439,927
Filed by GRILLO CHEMICALS GmbH, Duisburg (DE)
PCT Filed Mar. 17, 2020, PCT No. PCT/EP2020/057262
§ 371(c)(1), (2) Date Sep. 16, 2021,
PCT Pub. No. WO2020/187901, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 19164464 (EP), filed on Mar. 21, 2019.
Prior Publication US 2022/0153691 A1, May 19, 2022
Int. Cl. C07C 303/06 (2006.01)
CPC C07C 303/06 (2013.01) 18 Claims
 
1. A method for producing a haloalkane sulfonic acid, comprising the steps of:
a) contacting sulfur trioxide (SO3—), a haloalkane, and compound which is able to initialize the reaction between sulfur trioxide (SO3) and haloalkane with each other in the presence of a solvent,
wherein at least one of:
i) said solvent is a superacid; and
ii) the combination of said solvent with one or more of sulfur trioxide (SO3) and the haloalkane sulfonic acid gives rise to a superacid; and
wherein the solvent is not H2SO4.