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US 2022/0144767 A1Published application
Process to produce a mono vinyl thioether
AssigneeBASF SE
InventorsRuth Lohwasser, Pavel Tuzina, Frank Bienewald, Dagmar Pascale Kunsmann-Keitel
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Abstract
A process produces a mono vinyl thioether by reacting acetylene with a compound containing one thiol group and one hydroxy group, referred to as a thiol-hydroxy compound, where the reaction is performed at a pressure below 2 bars.
Claims10
1:
- A process to produce a mono vinyl thioether, the process comprising:
- reacting acetylene with a thiol-hydroxy compound comprising one thiol group and one hydroxy group,
- wherein the reaction is performed at a pressure below 2 bars.
2:
- The process according to claim 1, wherein the thiol-hydroxy compound is a compound of formula I;
- HS—R—OH
- wherein R is a linear or branched aliphatic hydrocarbon group which may comprise
- oxygen in the form of ether groups.
1 more element
3:
- The process according to claim 1, wherein the thiol-hydroxy compound is 2-hydroxy-ethane-1-thiol.
4:
- The process according to claim 1, wherein the process is a process to produce vinyl thioethanol of formulas;
- H2C═CH—S—CH2—CH2—OH.
5:
- The process according to claim 1, wherein the reaction is performed in presence of a catalyst.
6:
- The process according to claim 5, wherein the catalyst is an alkali salt of the thiol-hydroxy compound.
7:
- The process according to claim 5, wherein the catalyst is used in an amount of 0.1 to 10 parts by weight per 100 parts by weight of the thiol-hydroxy compound.
8:
- The process according to claim 1, wherein the reaction is performed at a pressure below 1.5 bars.
9:
- The process according to claim 1, wherein the acetylene is fed directly into a liquid phase comprising the thiol-hydroxy compound and any products already formed.
10:
- The process according to claim 1, wherein the acetylene is fed continuously to a reactor and unreacted acetylene as well as any other gaseous compounds are withdrawn from the reactor while the pressure is kept below 2 bars.