DE2224556B1 - METHOD FOR PRODUCING INDOL FROM O-AETHYLANILINE - Google Patents
METHOD FOR PRODUCING INDOL FROM O-AETHYLANILINEInfo
- Publication number
- DE2224556B1 DE2224556B1 DE19722224556 DE2224556A DE2224556B1 DE 2224556 B1 DE2224556 B1 DE 2224556B1 DE 19722224556 DE19722224556 DE 19722224556 DE 2224556 A DE2224556 A DE 2224556A DE 2224556 B1 DE2224556 B1 DE 2224556B1
- Authority
- DE
- Germany
- Prior art keywords
- percent
- catalyst
- weight
- ethylaniline
- hydrogen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D231/00—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
- C07D231/02—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings
- C07D231/10—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D231/12—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/02—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom condensed with one carbocyclic ring
- C07D209/04—Indoles; Hydrogenated indoles
- C07D209/08—Indoles; Hydrogenated indoles with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to carbon atoms of the hetero ring
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
- C07D233/54—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members
- C07D233/56—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, attached to ring carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D249/00—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms
- C07D249/02—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms not condensed with other rings
- C07D249/08—1,2,4-Triazoles; Hydrogenated 1,2,4-triazoles
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Indole Compounds (AREA)
- Catalysts (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
Description
anilindampf und Wasserstoff, die pro Volumeinheitaniline vapor and hydrogen per unit volume
20 des Katalysators pro Stunde durch den Reaktor fließen, beträgt vorzugsweise von etwa 100 bis 1500 reziproke Stunden.20 of the catalyst flowing through the reactor per hour is preferably from about 100 to 1500 reciprocal hours.
Die Erfindung betrifft ein Verfahren zur Herstellung Das Molverhältnis von o-Äthylanilin zu WasserstoffThe invention relates to a process for the preparation of the molar ratio of o-ethylaniline to hydrogen
von Indol aus o-Äthylanilin in Gegenwart eines liegt vorzugsweise zwischen 1: 4 und 1: 8.of indole from o-ethylaniline in the presence of one is preferably between 1: 4 and 1: 8.
Katalysators. 25 Die Durchführung des Verfahrens kann in einemCatalyst. 25 The procedure can be carried out in a
Verfahren, bei welchen die Dehydrocyclisierung Fest-, Wirbel- oder Fließbett-Reaktor erfolgen,Processes in which the dehydrocyclization takes place in a fixed, fluidized or fluidized bed reactor,
von o-Äthylanilin in der Gasphase Indol ergibt, sind Das erfindungsgemäße Produkt ist Indol, das vomof o-ethylaniline in the gas phase gives indole, are The product according to the invention is indole, which from
bekannt. Nach den bekannten Verfahren wird die nicht umgesetzten o-Äthylanilin nach irgendeinemknown. According to the known method, the unreacted o-ethylaniline after any
Umsetzung in der Gasphase in Gegenwart eines geeigneten Verfahren aus dem ReaktionsgemischReaction in the gas phase in the presence of a suitable process from the reaction mixture
Katalysators mit einem Gehalt an aktiviertem Al2O3 30 abgetrennt wird, z. B. durch fraktionierte DestillationCatalyst with a content of activated Al 2 O 3 30 is separated, z. B. by fractional distillation
oder an SiO2, die gegebenenfalls mit Oxiden von mehr- oder Extraktion mit einem geeigneten Lösungsmittel,or on SiO 2 , optionally with oxides of more or extraction with a suitable solvent,
wertigen Metallen, wie denen des Chroms, Kupfers, Das abgetrennte o-Äthylanilin wird wieder eingesetzt.Valuable metals, such as those of chromium, copper, The separated o-ethylaniline is used again.
Kobalts, Molybdäns oder Vanadins modifiziert sind, Das nachstehende Beispiel stellt eine bevorzugteCobalt, molybdenum or vanadium are modified, the example below represents a preferred one
oder an Edelmetallkatalysatoren, wie Platin oder Ausführungsform der Erfindung dar. Beispiel 2 bildetor on noble metal catalysts, such as platinum or embodiment of the invention. Example 2 forms
Palladium, sowie an Titandioxid durchgeführt, _ 35 dazu einen Vergleich mit dem Vorgehen nach be-Palladium, as well as titanium dioxide, _ 35 a comparison with the procedure according to
Allgemein wird nach diesen Verfahren o-Äthyi- kanntem Vorschlag aus J. Am. Chem. Soc, 73,In general, according to this method, o-ethyi-known proposal from J. Am. Chem. Soc, 73,
anilin in der Gasphase in Anwesenheit von Wasser- S. 3080 (1951), bzw. Roczniki Chemii, 31, S. 1057aniline in the gas phase in the presence of water - p. 3080 (1951), or Roczniki Chemii, 31, p. 1057
stoff, Stickstoff oder Luft und in Gegenwart eines (1957).
Dehydrierungskatalysators (z. B. Al2O3 oder SiO2),substance, nitrogen or air and in the presence of one (1957).
Dehydrogenation catalyst (e.g. Al 2 O 3 or SiO 2 ),
dem in bevorzugter Ausführung die oben angeführten 40 Beispiell
Metalloxide zugesetzt sind, oder eines Edelmetallkatalysators bei Temperaturen zwischen 400 bis 60,5 g (V2MoI) o-Äthylanilin werden innerhalb
7000C zur Umsetzung gebracht. Die nach diesen von 2 Stunden mittels einer Dosierpumpe in einen
Verfahren erzielten Indolausbeuten liegen zwischen Verdampfer gespeist und verdampft. Gleichzeitig
20 bis b0% der Theorie und sind deshalb für ein 45 werden während dieser Zeit über eine Meßeinrichtung
großtechnisches Verfahren zur Indolsynthese unbe- 67,2 Nl Wasserstoff der Vorheizzone eines Reaktors
friedigend. zugeführt, wo eine Vermischung mit den o-Äthyl-Es wurde nun festgestellt, daß die Ausbeute an anilindämpfen bei einer Temperatur von 500 0C erfolgt.
Indol ganz beträchtlich zunimmt, wenn der Anteil Von hier gelangt das Gasgemisch in den Reaktor
an Kupfer in einem Chrom-Kupfer-Katalysator weit 50 über 200 ml eines auf 5500C erhitzten SiO2-Katalyüber
das nach den bekannten Verfahren höchstens sators, der mit 22 Gewichtsprozent Kupfer, 8 Gewichtsübliche
Maß hinaus erhöht wird und wenn dem prozent Bariumchromatund2 GewichtsprozentChrom-Katalysator
weiter ein Metall der II. Hauptgruppe dioxid modifiziert ist.the 40 examples given above in a preferred embodiment
Metal oxides are added, or a noble metal catalyst at temperatures from 400 to 60.5 g of (V 2 MoI) o-ethylaniline are brought within 700 0 C for reaction. The indole yields achieved after these 2 hours by means of a metering pump in a process lie between the evaporator fed and evaporated. At the same time 20 to b0% of theory and are therefore unsatisfactory for a 45 during this time a large-scale process for indole synthesis using a measuring device. fed, where mixing with the o-ethyl It has now been found that the yield of aniline is carried out by steaming at a temperature of 500 0 C. Indole increases quite considerably when the proportion from here the gas mixture gets into the reactor of copper in a chromium-copper catalyst far 50 over 200 ml of a SiO 2 catalyst heated to 550 0 C over the, according to the known method, at most sators, which with 22 percent by weight copper, 8 percent by weight is increased and if the percent barium chromate and 2 percent by weight chromium catalyst are further modified by a metal of main group II, dioxide.
als Chromat zugesetzt wird. Die Raumgeschwindigkeit ist 196 h~\ die Verweil-is added as chromate. The space velocity is 196 h ~ \ the dwell
Gegenstand der Erfindung ist ein Verfahren zur 55 zeit 4,44 Sek. Das Reaktionsprodukt wird konden-The invention relates to a process for 55 time 4.44 seconds. The reaction product is condensed
Herstellung von Indol aus o-Äthylanüin in der Gas- siert. Es fallen 57 g Kondensat an, das aus 25,3 gProduction of indole from o-ethylanine in the gassing. 57 g of condensate are obtained from 25.3 g
phase in Gegenwart von Wasserstoff und einem Indol, 1,0 g Methylindolen und 29,4 g unumgesetztemphase in the presence of hydrogen and an indole, 1.0 g of methyl indoles and 29.4 g of unreacted
Dehydrierungskatalysator auf der Basis von SiO2, o-Äthylanilin besteht.Dehydrogenation catalyst based on SiO 2 , o-ethylaniline.
modifiziert mit Chromdioxid und Kupfer, bei 400 Die Indolausbeute, bezogen auf das umgesetztemodified with chromium dioxide and copper, at 400 The indole yield, based on the converted
bis 7000C, das dadurch gekennzeichnet ist, daß der 60 o-Äthylanilin, beträgt 84,2 % der Theorie.
Katalysator aus 55 bis 65 Gewichtsprozent SiO2,to 700 0 C, which is characterized in that the 60 o-ethylaniline, is 84.2% of theory.
Catalyst made from 55 to 65 percent by weight SiO 2 ,
18 bis 24 Gewichtsprozent Kupfer, 8 bis 10 Gewichts- Beispiel 2
prozent Bariumchromat und 2 bis 4 Gewichtsprozent18 to 24 percent by weight copper, 8 to 10 percent by weight - Example 2
percent barium chromate and 2 to 4 percent by weight
Chiromdioxid besteht, die Reaktionstemperatur 500 60,5 g (1J2 Mol) o-Äthylanilin werden innerhalbThere is chiromium dioxide, the reaction temperature 500 60.5 g ( 1 J 2 mol) of o-ethylaniline are within
bis 600° C beträgt und das Molverhältnis von o-Äthyl- 65 von 2 Stunden mittels einer Dosierpumpe in einento 600 ° C and the molar ratio of o-ethyl 65 of 2 hours by means of a metering pump in one
anilin zu Wasserstoff zwischen 1: 4 und 1: 20 liegt. Verdampfer gespeist und verdampft. Gleichzeitiganiline to hydrogen is between 1: 4 and 1:20. Evaporator fed and evaporated. Simultaneously
Beim Vorgehen nach dem Vorschlag der Erfindung werden während dieser Zeit über eine MeßeinrichtungWhen proceeding according to the proposal of the invention, a measuring device is used during this time
werden mit einem solchen Katalysator, der gegenüber 67,2 Nl Wasserstoff der Vorheizzone des Reaktorsbe with such a catalyst, which compared to 67.2 Nl hydrogen of the preheating zone of the reactor
zugeführt, wo eine Vermischung mit den o-Äthyianilindämpfen bei einer Temperatur von 500° C erfolgt.fed, where a mixture with the o-Äthyianilindampf takes place at a temperature of 500 ° C.
Von hier gelangt das Gasgemisch in den Reaktor über 100 ml eines auf 5500C erhitzten Al2O3-Katalysators, der mit 21,4 Gewichtsprozent Chromdioxid und 0,4 Gewichtsprozent Kupfer modifiziert ist. Die Raumgeschwindigkeit ist 392 h"1, die Verweilzeit 2,25 Sek. Das Reaktionsprodukt wird kondensiert. Es fallen 49,5 g Kondensat an, das aus 32,9 g Indol, 3,1 g Methylindolen, 5,5 g Anilin und 3,1 g unumgesetztem o-Äthylanilin besteht. Die Indolausbeute, bezogen auf das umgesetzte o-Äthylanilin beträgt 59,3% der Theorie.From here the gas mixture reaches the reactor via 100 ml of an Al 2 O 3 catalyst heated to 550 ° C., which is modified with 21.4 percent by weight of chromium dioxide and 0.4 percent by weight of copper. The space velocity is 392 h " 1 , the residence time 2.25 seconds. The reaction product is condensed. 49.5 g of condensate are obtained The indole yield, based on the converted o-ethylaniline, is 59.3% of theory.
Claims (1)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19722224556 DE2224556C2 (en) | 1972-05-19 | 1972-05-19 | Process for the production of indole from o ethyl aniline |
GB1828573A GB1362510A (en) | 1972-05-19 | 1973-04-16 | Process for the production of indole |
CH567673A CH575394A5 (en) | 1972-05-19 | 1973-04-19 | |
IT4970773A IT980378B (en) | 1972-05-19 | 1973-04-27 | PROCEDURE FOR THE PRODUCTION OF INDOLE FROM OR ETHYL NILINE |
SE7306965A SE384676B (en) | 1972-05-19 | 1973-05-17 | PROCEDURE FOR THE PREPARATION OF INDOL FROM O-ETHYLANILINE |
FR7318131A FR2185622B1 (en) | 1972-05-19 | 1973-05-18 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19722224556 DE2224556C2 (en) | 1972-05-19 | 1972-05-19 | Process for the production of indole from o ethyl aniline |
Publications (3)
Publication Number | Publication Date |
---|---|
DE2224556A1 DE2224556A1 (en) | 1974-01-10 |
DE2224556B1 true DE2224556B1 (en) | 1974-01-10 |
DE2224556C2 DE2224556C2 (en) | 1974-08-01 |
Family
ID=5845398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19722224556 Expired DE2224556C2 (en) | 1972-05-19 | 1972-05-19 | Process for the production of indole from o ethyl aniline |
Country Status (6)
Country | Link |
---|---|
CH (1) | CH575394A5 (en) |
DE (1) | DE2224556C2 (en) |
FR (1) | FR2185622B1 (en) |
GB (1) | GB1362510A (en) |
IT (1) | IT980378B (en) |
SE (1) | SE384676B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE28325T1 (en) * | 1983-03-23 | 1987-08-15 | Lonza Ag | PROCESS FOR THE PREPARATION OF 7-ALKYLINDOLEN. |
AU5645196A (en) * | 1995-04-11 | 1996-10-30 | Lonza A.G. | Process for preparing azaindoles with an activated copper ch romite catalyst by catalytic dehydrocyclisation of alkylpyri dylamines (pyridopyridines) |
-
1972
- 1972-05-19 DE DE19722224556 patent/DE2224556C2/en not_active Expired
-
1973
- 1973-04-16 GB GB1828573A patent/GB1362510A/en not_active Expired
- 1973-04-19 CH CH567673A patent/CH575394A5/xx not_active IP Right Cessation
- 1973-04-27 IT IT4970773A patent/IT980378B/en active
- 1973-05-17 SE SE7306965A patent/SE384676B/en unknown
- 1973-05-18 FR FR7318131A patent/FR2185622B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CH575394A5 (en) | 1976-05-14 |
DE2224556A1 (en) | 1974-01-10 |
GB1362510A (en) | 1974-08-07 |
FR2185622A1 (en) | 1974-01-04 |
SE384676B (en) | 1976-05-17 |
IT980378B (en) | 1974-09-30 |
DE2224556C2 (en) | 1974-08-01 |
FR2185622B1 (en) | 1977-11-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
E77 | Valid patent as to the heymanns-index 1977 | ||
8339 | Ceased/non-payment of the annual fee |