FIELD: technological processes.
SUBSTANCE: invention relates to a process for the preparation of mono-, di-, tri-, tetramethylthiophenes, which is characterized by the reaction of thiophene with dimethyl disulphide in the presence of a catalyst, a cobalt-modified high-silica zeolite HZSM-5, in the gas phase, at atmospheric pressure, temperature 270–350 °C, the contact time is 1.0–7.4 s.
EFFECT: high selectivity of methylthiophene formation.
1 cl, 1 tbl, 10 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING (METHYLTHIO)THIOPHENES | 2015 |
|
RU2594481C1 |
| BENZENE METHYLATION METHOD | 2015 |
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| DIMETHYLSULPHIDE SYNTHESIS METHOD | 2009 |
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RU2402529C1 |
| METHOD OF PRODUCTION OF PHENOL AND ITS DERIVATIVES AND METHOD OF OXIDATION OF BENZENE AND ITS DERIVATIVES | 1998 |
|
RU2202532C2 |
| 0 |
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SU278708A1 | |
| METHOD OF OBTAINING DIALCILSULFIDES | 2016 |
|
RU2622046C1 |
| 0 |
|
SU258316A1 | |
| METHOD OF OXIDATION OF TOLUENE INTO PHENOL, AND/OR CRESOLS | 1999 |
|
RU2155181C1 |
| 0 |
|
SU1776655A1 | |
| METHOD OF PRODUCING DIMETHYL SULPHIDE | 2011 |
|
RU2457029C1 |
