DE524691C - Process for the hydrogenation of open and fused homologues of aniline - Google Patents

Process for the hydrogenation of open and fused homologues of aniline

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Publication number
DE524691C
DE524691C DEI31123D DEI0031123D DE524691C DE 524691 C DE524691 C DE 524691C DE I31123 D DEI31123 D DE I31123D DE I0031123 D DEI0031123 D DE I0031123D DE 524691 C DE524691 C DE 524691C
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DE
Germany
Prior art keywords
aniline
hydrogenation
homologues
fused
open
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.)
Expired
Application number
DEI31123D
Other languages
German (de)
Inventor
Dr Theodor Goost
Dr Wilhelm Lommel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEI31123D priority Critical patent/DE524691C/en
Application granted granted Critical
Publication of DE524691C publication Critical patent/DE524691C/en
Expired legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07BGENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
    • C07B31/00Reduction in general

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

Verfahren zur Hydrierung von offenen und annellierten Homologen des Anilins Die technische Hydrierung der Homologen des Anilins war bisher nicht möglich. S a -b a t i e r konnte nach seiner Methode noch nicht einmal so viel von den Hydrierungsprodukten gewinnen, daß er die Eigenschaften der Körper festlegen konnte (C. r. 138, S. 1259 [19o4]). Die Hydrierung der Salze dieser Basen mit Edelmetallen ist S k i t a zwar gelungen (Ber. 52, 1519 [1919]), jedoch ist dieses Verfahren schon wegen der großen Menge Platin, etwa 15 N, technisch nicht ausführbar. Dazu kommt, daß unter Zusatz von Chlorwasserstoff gearbeitet werden muß, wodurch die Apparaturfrage sehr schwierig wird.Process for the hydrogenation of open and fused homologues of aniline The technical hydrogenation of the homologues of aniline has not been possible up to now. According to his method, S a -batier could not even gain so much of the hydrogenation products that he could determine the properties of the body (C. r. 138, p. 1259 [19o4]). S kita succeeded in hydrogenating the salts of these bases with noble metals (Ber. 52, 1519 [1919]), but this process is technically not feasible due to the large amount of platinum, about 15 N. In addition, it is necessary to work with the addition of hydrogen chloride, which makes the question of apparatus very difficult.

Es wurde nun gefunden, daß man die Homologen des Anilins mit guter Ausbeute hydrieren kann, wenn man die Basen unter Zusatz von Katalysatoren mit Wasserstoff unter Druck auf höhere Temperatur erhitzt. Beispieli i oo Gewichtsteile p- oder o-Toluidin werden in einem Rührautoklaven mit 2 Gewichtsteilen eines Cobaltkatalysators bei einem Wasserstoffdruck von etwa i oo Atm. erhitzt. Bei 270° geht die Aufnahme des Wasserstoffes schnell vor sich, nach 2 Stunden sind über 6o0,1o Toluidin hydriert.It has now been found that the homologues of aniline with good Yield can be hydrogenated if the bases with the addition of catalysts with hydrogen heated under pressure to a higher temperature. Examples i oo parts by weight p- or o-Toluidine are in a stirred autoclave with 2 parts by weight of a cobalt catalyst at a hydrogen pressure of about 100 atm. heated. The recording goes at 270 ° of the hydrogen quickly in front of you, after 2 hours over 6o0.1o toluidine is hydrogenated.

Beispiel 2 ioo Gewichtsteile m-Toluidin werden mit 2 Gewichtsteilen eines Cobaltkatalysators bei einem Wasserstoffdruck von etwa i oo Atm. unter Anheizen gemischt. Bei etwa 27o bis 28o" wird die Wasserstoffaufnahme sehr schnell. Bereits nach i12 Stunden sind 8o% Hexahydro-m-toluidin gebildet. Der Katalysator ist wieder verwendbar.Example 2 100 parts by weight of m-toluidine are mixed with 2 parts by weight a cobalt catalyst at a hydrogen pressure of about 100 atm. under heating mixed. At around 27o to 28o "the hydrogen uptake becomes very rapid. Already after 12 hours 80% hexahydro-m-toluidine has been formed. The catalyst is back usable.

Beispiel 3 ioo Gewichtsteile p-Xylidin werden mit 2 Gewichtsteilen Nickeloxyd in einem Rührautoklaven unter einem Wasserstoffdruck von etwa ioo Atm, erhitzt. Bei etwa 275° beginnt die Aufnahme des Wasserstoffs. Nach 41/, Stunden sind etwa 3o'/" des Einsatzes hydriert. Man kann den hydrierten Teil nach dem Verfahren des Patents 519518 vor der Weiterverarbeitung entfernen und den unveränderten Anteil mit demselben Katalysator weiterhydrieren. Durch Steigerung der Temperatur läßt sich der Vorgang beschleunigen.Example 3 100 parts by weight of p-xylidine are mixed with 2 parts by weight Nickel oxide in a stirred autoclave under a hydrogen pressure of about 100 atm heated. The absorption of hydrogen begins at around 275 °. After 41 /, hours are about 3o '/ "of the insert hydrogenated. You can remove the hydrogenated portion by the process of the patent 519518 before further processing and remove the unchanged portion hydrogenate further with the same catalyst. By increasing the temperature it leaves the process will accelerate.

Als Beispiel für ein Ringhomologes des Anilins diene Beispiel ¢. Bei spi.e.l.q. 3 ioo Gewichtsteile ß-Naphthylamin werden in einem Rührautoklaven mit 2 Gewichtsteilen eines Nickelkatalysators unter einem Wasserstoffdruck von etwa ioo Atm. erhitzt. Bei 23o° beginnt eine langsame Aufnahme, die bei Steigerung der Temperatur bis gegen 300° so schnell wird, daß in 15 bis 2o Minuten über 5o Gewichtsteile aromatisches Tetrahydro-ß-naphthylarn::i und über 30 Gewichtsteile alicyclisches Tetrahydro-ß-naphthylamin gebildet sind.As an example of a ring homologue of aniline, use example [. At spi.elq 3 100 parts by weight of ß-naphthylamine are in a stirred autoclave with 2 parts by weight of a nickel catalyst under a hydrogen pressure of about 100 atm. heated. At 23o ° a slow uptake begins, which becomes so fast when the temperature rises to about 300 ° that in 15 to 20 minutes over 50 parts by weight of aromatic tetrahydro-β-naphthylamine and over 30 parts by weight of alicyclic tetrahydro-β-naphthylamine are formed are.

Claims (1)

PATENTANSPRUCH: Verfahren zur Hydrierung von offenen und annellierten Homologen des Anilins, dadurch gekennzeichnet, daß man die Basen in Gegenwart von Katalysatoren mit Wasserstoff unter Druck erhitzt.PATENT CLAIM: Process for the hydrogenation of open and fused Homologs of aniline, characterized in that the bases in the presence of Catalysts heated with hydrogen under pressure.
DEI31123D 1927-05-08 1927-05-08 Process for the hydrogenation of open and fused homologues of aniline Expired DE524691C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI31123D DE524691C (en) 1927-05-08 1927-05-08 Process for the hydrogenation of open and fused homologues of aniline

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI31123D DE524691C (en) 1927-05-08 1927-05-08 Process for the hydrogenation of open and fused homologues of aniline

Publications (1)

Publication Number Publication Date
DE524691C true DE524691C (en) 1931-05-21

Family

ID=7187794

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI31123D Expired DE524691C (en) 1927-05-08 1927-05-08 Process for the hydrogenation of open and fused homologues of aniline

Country Status (1)

Country Link
DE (1) DE524691C (en)

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