SU445667A1 - The method of producing thiophene - Google Patents
The method of producing thiopheneInfo
- Publication number
- SU445667A1 SU445667A1 SU1904978A SU1904978A SU445667A1 SU 445667 A1 SU445667 A1 SU 445667A1 SU 1904978 A SU1904978 A SU 1904978A SU 1904978 A SU1904978 A SU 1904978A SU 445667 A1 SU445667 A1 SU 445667A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- catalyst
- selectivity
- thiophene
- producing
- producing thiophene
- Prior art date
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- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Catalysts (AREA)
Description
1one
Изобретение относитс к усовершенствованию способа получени тиофена.This invention relates to an improvement in the process for producing thiophene.
Известен способ получени тиофена деалкилированием 2-метилтиофена в присутствии цеолитного катализатора в проточной установке при 180-500°С.A known method for producing thiophene by dealkylation of 2-methylthiophene in the presence of a zeolite catalyst in a flow-through installation at 180-500 ° C.
Недостатком этого способа вл етс низка селективность процесса. Избирательность по тиофепу па указанном катализаторе не превышает 50%.The disadvantage of this method is the low selectivity of the process. Selectivity for thiophepa pas specified catalyst does not exceed 50%.
С целью повышени селективности процесса в качестве катализатора используют п тиокись ванади , нанесенную на окись алюмини или двуокись кремни .In order to increase the selectivity of the process, vanadium pentoxide supported on alumina or silica is used as a catalyst.
Селективность предлагаемого способа получени тиофепа 87-90%.The selectivity of the proposed method for producing thiofep is 87-90%.
Пример 1. Катализатор готов т нанесением водного раствора оксалата ванади на силикагель в расчете 0,5 вес. % V2O5. После сушки и прокаливани в токе воздуха при 500°С 4 мл катализатора загружают в стекл нный реактор. Затем через него пропускают 2-метилтиофен со скоростью 0,098 г/час. Опыт провод т при 500°С в токе гели (2,5 л/час). Выход тиофена 8%. Селективность 90%.Example 1. The catalyst is prepared by applying an aqueous solution of vanadium oxalate on silica gel in a calculation of 0.5 weight. % V2O5. After drying and calcining in a stream of air at 500 ° C, 4 ml of catalyst are loaded into a glass reactor. Then 2-methylthiophen is passed through it at a rate of 0.098 g / hour. The test was carried out at 500 ° C in a current of gels (2.5 l / h). Thiophene yield 8%. Selectivity of 90%.
Пример 2. Катализатор готов т по примеру 1 с расчетом нанесени 40% V2O5. Опьп провод т аналогично примеру 1. Выход тио фена 67%. Селективность 88%.Example 2. The catalyst was prepared in accordance with Example 1 with the calculation of the deposition of 40% V2O5. OPP is carried out analogously to example 1. The yield of thiophene is 67%. Selectivity of 88%.
Пример 3. Катализатор готов т нанесением оксалата вападп на окпсь алюмини в расчете 1 вес. % VoOs. Опыт провод т по примеру I. Выход тиофеиа 15%. Селективность 90%.Example 3. The catalyst was prepared by applying vadpad oxalate to aluminum oxide in the calculation of 1 weight. % Voos. The experiment was carried out according to example I. The yield of thiofia is 15%. Selectivity of 90%.
Пример 4. Катализатор готов т по примеру 1 в расчете нанесени 40% V2O5. Опыт провод т аналогично примеру 1. Выход тиофена 63%. Селективность 87%.Example 4. The catalyst was prepared according to Example 1 with the calculation of the deposition of 40% V2O5. The experiment was carried out analogously to example 1. The yield of thiophene was 63%. Selectivity of 87%.
Результаты деалкилировапи 2-метилтиофена в присутствии известных (1-4) и предлагаемых (5-8) катализаторов приведены в таблице.The results of dealkylation of 2-methylthiophene in the presence of known (1-4) and proposed (5-8) catalysts are given in the table.
Предмет изобретени Subject invention
Способ получени тиофена деалкилированием 2-метилтиофена в присутствии катализатора , отличающийс тем, что, с целью повышени селективности процесса, в качестве катализатора используют п тиокись ванади , нанесенную на двуокись кремни или окись алюмини .A method of producing thiophene by dealkylation of 2-methylthiophene in the presence of a catalyst, characterized in that, in order to increase the selectivity of the process, vanadium pentoxide supported on silica or alumina is used as a catalyst.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1904978A SU445667A1 (en) | 1973-04-04 | 1973-04-04 | The method of producing thiophene |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1904978A SU445667A1 (en) | 1973-04-04 | 1973-04-04 | The method of producing thiophene |
Publications (1)
Publication Number | Publication Date |
---|---|
SU445667A1 true SU445667A1 (en) | 1974-10-05 |
Family
ID=20548754
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU1904978A SU445667A1 (en) | 1973-04-04 | 1973-04-04 | The method of producing thiophene |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU445667A1 (en) |
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1973
- 1973-04-04 SU SU1904978A patent/SU445667A1/en active
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