Basf Se Corporation

Jan Spielmann

Ulrich Müller

Andrei-Nicolae Parvulescu

Juergen Wortmann

Thomas Schaub

Kerstin Schierle-Arndt

Frieder Borgmeier

Michael Koch

Sabine Weiguny

Timo Ott

Jürgen Wortmann

Feelly Ruether

Michael Zeilinger

Daniel Loeffler

Axel Kirste

Maraike Ahlf

David Dominique Schweinfurth

Katharina Federsel

Falko Abels

Boris Gaspar

Karl Matos

Andreas Kempter

Jun Gao

Bjoern Kaibel

Florian Blasberg

Ingo Biertuempel

Robert Sengpiel

Wilfried Vogel

Frank Piepenbreier

Rosario Mazarro Berdonces

Chee Jian Chan

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 HSO; 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.

Process for the manufacturing of alkanesulfonic acids

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.

Process for the manufacturing of methane sulfonic acid

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.

Process for the production of alkanesulfonic acids

A process for purifying alkanesulfonic anhydride that includes feeding a stream containing alkanesulfonic anhydride, sulfuric acid, high boilers and residual low boilers into a melt crystallization to form crystals of the alkanesulfonic anhydride suspended in mother liquor, and solid-liquid separation to remove the crystals from the mother liquor.

Process for purifying alkanesulfonic anhydride and process for producing alkanesulfonic acid using the purified alkanesulfonic anhydride

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.

Process for purifying alkanesulfonic acids

The present invention is in the field of processes for the generation of thin inorganic films on substrates, in particular atomic layer deposition processes. It relates to a process for preparing metal films comprising (a) depositing a metal-containing compound from the gaseous state onto a solid substrate and (b) bringing the solid substrate with the deposited metal-containing compound in contact with a reducing agent in the gaseous state, wherein the reducing agent is or at least partially forms at the surface of the solid substrate a carbene, a silylene or a phosphor radical.

Process for the generation of metallic films

The invention relates to a method of reprocessing alkanesulfonic acid employed in a chemical process as an agent, catalyst or solvent and comprising the steps of:

Method of reprocessing alkanesulfonic acid

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Ludwigshafen, Germany

Jan Spielmann