公开(公告)号：US11247967B2

公开(公告)日：2022-02-15

申请号：US16963748

申请日：2019-01-30

Applicant: BASF SE

Inventor： Frieder Borgmeier ,  Jan Spielmann ,  Michael Zeilinger ,  Juergen Wortmann

IPC: C07C303/14 ,  C07C303/44

Abstract: A process for manufacturing of an alkanesulfonic acid, and an alkanesulfonic acid manufactured by the process. Aspects of the process may involve manufacturing an alkanesulfonic acid by reaction of an initiator composition with an alkane and sulfur trioxide by preparing an initiator composition by reacting aqueous hydrogen peroxide with alkanesulfonic acid and/or H2SO4; and reacting the initiator composition with sulfur trioxide and alkane to form an alkanesulfonic acid, wherein an alkane with a purity of at least 98.0 mol-% is used.

公开(公告)号：US10577312B2

公开(公告)日：2020-03-03

申请号：US15774847

申请日：2016-11-08

Applicant: BASF SE

Inventor： Jan Spielmann ,  Michael Koch ,  Juergen Wortmann ,  Feelly Ruether ,  Sabine Weiguny ,  Frieder Borgmeier

IPC: C07C303/44 ,  C07C309/01 ,  C07C309/02 ,  C07C309/03 ,  B01D3/14 ,  B01D9/00 ,  B01D3/00

Abstract: A process comprising: (a) distilling a melt comprising crude alkanesulfonic acid to completely or partly remove low boilers, wherein the low boilers are drawn off at the top of a distillation column or of a one-stage evaporation apparatus and a material stream comprising alkanesulfonic acid, high boilers and residual low boilers is withdrawn at the bottom of the distillation column or of the one-stage evaporation apparatus, (b) sending the stream comprising alkanesulfonic acid, high boilers and residual low boilers into a melt crystallization as the starting melt to obtain crystals formed from the alkanesulfonic acid, hydrates of the alkanesulfonic acid or a mixture of both suspended in mother liquor, (c) performing a solid-liquid separation to remove the crystals from the mother liquor, and (d) optionally washing the crystals to remove mother liquor adhering to the crystals.

公开(公告)号：US10899705B2

公开(公告)日：2021-01-26

申请号：US16614599

申请日：2018-05-23

Applicant: BASF SE

Inventor： Jan Spielmann ,  Michael Zeilinger ,  Juergen Wortmann ,  Frieder Borgmeier

IPC: C07C317/04 ,  C07C315/06 ,  C07C303/06 ,  C07C303/44 ,  C07C309/04

Abstract: The present invention relates to a process for the manufacturing of methane sulfonic acid (MSA) by reaction of a radical initiator composition with methane and sulfur trioxide comprising the steps (a) preparation of the intiator composition by reacting aqueous hydrogen peroxide with the components methane sulfonic acid and methane sulfonic acid anhydride and (b) reaction of the initiator composition from step (a) with sulfur trioxide and methane to form methane sulfonic acid. The invention further relates to the use of methane sulfonic acid anhydride (MSA anhydride) in said process and to methane sulfonic acid manufactured by said process.

公开(公告)号：US12269791B2

公开(公告)日：2025-04-08

申请号：US17604694

申请日：2020-04-14

Applicant: BASF SE

Inventor： Frieder Borgmeier ,  Frank Piepenbreier ,  Andreas Kempter

IPC: C07C303/06 ,  C07C303/44

Abstract: The present invention relates to a process for manufacturing of anhydrous methanesulfonic acid (MSA) and to methanesulfonic acid manufactured by said process and its uses.

公开(公告)号：US10894766B2

公开(公告)日：2021-01-19

申请号：US16618283

申请日：2018-05-23

Applicant: BASF SE

Inventor： Jan Spielmann ,  Juergen Wortmann ,  Frieder Borgmeier ,  Michael Zeilinger ,  Rosario Mazarro Berdonces ,  Bjoern Kaibel

IPC: C07C317/04 ,  C07C315/06 ,  C07C303/06 ,  C07C303/44 ,  C07C309/04

Abstract: The present invention deals with a process for the production of alkanesulfonic acids, in particular methanesulfonic acid, and a method of purification of the raw products.