公开(公告)号：US20210094908A1

公开(公告)日：2021-04-01

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：US20200216388A1

公开(公告)日：2020-07-09

申请号：US16614599

申请日：2018-05-23

Applicant: BASF SE

Inventor： Jan SPIELMANN ,  Michael ZEILINGER ,  Juergen WORTMANN ,  Frieder BORGMEIER

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

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：US20180327352A1

公开(公告)日：2018-11-15

申请号：US15774722

申请日：2016-11-08

Applicant: BASF SE

Inventor： Jan SPIELMANN ,  Michael KOCH ,  Juergen WORTMANN ,  Sabine WEIGUNY ,  Feelly RUETHER ,  Robert SENGPIEL

IPC: C07C303/44

CPC classification number: C07C303/44 ,  C07C309/04

Abstract: 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: (a) removing an alkanesulfonic acid-comprising stream from a reaction mixture generated in the chemical process, (b) feeding the alkanesulfonic acid-comprising stream into a melt crystallization as the starting melt to form crystals of the alkanesulfonic acid, of hydrates of the alkanesulfonic acid or of a mixture of both suspended in mother liquor, (c) performing a solid-liquid separation to remove the crystals from the mother liquor, (d) optionally washing the crystals to remove mother liquor adhering to the crystals, (e) recycling the washed or unwashed crystals removed from the mother liquor into the chemical process.

公开(公告)号：US20180319739A1

公开(公告)日：2018-11-08

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 ,  B01D9/00 ,  B01D3/00 ,  B01D3/14

Abstract: The invention relates to a process for purifying alkanesulfonic acids which comprises the steps of: (a) distilling a melt comprising crude alkanesulfonic acid (1) to completely or partly remove low boilers, wherein the low boilers are drawn off at the top of a distillation column (3) or of a one-stage evaporation apparatus and a material stream (7) comprising alkanesulfonic acid, high boilers and residual low boilers is withdrawn at the bottom of the distillation column (3) or of the one-stage evaporation apparatus, (b) sending the stream (7) comprising alkanesulfonic acid, high boilers and residual low boilers into a melt crystallization (9) as the starting melt to form crystals of the alkanesulfonic acid, of hydrates of the alkanesulfonic acid or of a mixture of both suspended in mother liquor, (c) performing a solid-liquid separation to remove the crystals from the mother liquor, (d) optionally washing the crystals to remove mother liquor adhering to the crystals.

公开(公告)号：US20200039927A1

公开(公告)日：2020-02-06

申请号：US16605973

申请日：2018-04-18

Applicant: BASF SE

Inventor： Juergen WORTMANN ,  Jan SPIELMANN ,  Katharina FEDERSEL ,  Feelly RUETHER

IPC: C07C303/44 ,  C07C303/06

Abstract: A process for purifying alkanesulfonic anhydride which includes:(a) 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,(b) performing a solid-liquid separation to remove the crystals from the mother liquor, and(c) optionally washing the crystals to remove mother liquor adhering to the crystals.

公开(公告)号：US20190137188A1

公开(公告)日：2019-05-09

申请号：US16096319

申请日：2017-04-20

Applicant: BASF SE

Inventor： Juergen WORTMANN ,  Sabine WEIGUNY ,  Katharina FEDERSEL ,  Matthias HINRICHS ,  Stephan MAURER

IPC: F28D20/00 ,  C09K5/12 ,  F24S80/20 ,  F24S60/10 ,  F28D20/02

Abstract: Use of a nitrate salt composition Z comprising Z1 at least one alkali metal nitrate and optionally alkaline earth metal nitrate and also Z2 at least one alkali metal nitrite and optionally alkaline earth metal nitrite in an amount of Z2 in the range from 1.1 to 15.0 mol % based on the sum of Z1 plus Z2 as heat transfer or heat storage medium in apparatuses in which these heat transfer or heat storage media are comprised at a temperature in the range from 500 to 620° C. and an oxygen partial pressure over the nitrate salt composition in the range from 0.1 to 1.0 atm, wherein the molar amount of the alkali metal nitrite and optionally alkaline earth metal nitrite for a desired temperature selected from the range indicated above and for a desired oxygen partial pressure selected from the range indicated above is calculated by means of the following formula x nitrite = K 6  ( T ) K 6  ( T ) + P O   2 where the variables have the following meanings: xnitrate is the mole fraction of nitrite in a nitrite/nitrate mixture, K6(T) is the temperature-dependent equilibrium constant of the reaction nitrate⇄nitrite+½ oxygen (NO3−⇄ NO2−+½ O2), pO2 is the oxygen partial pressure and T is the temperature of the nitrate salt composition, and the calculated value of the molar concentration of the component Z2 is optionally reduced by 40% or increased by 20% and the nitrate salt composition Z is heated to a maximum operating temperature in the range from 500 to 620° C. in the first start-up of said apparatuses.