DE516999C - Process for the preparation of aromatic amines - Google Patents

Process for the preparation of aromatic amines

Info

Publication number
DE516999C
DE516999C DEI30358D DEI0030358D DE516999C DE 516999 C DE516999 C DE 516999C DE I30358 D DEI30358 D DE I30358D DE I0030358 D DEI0030358 D DE I0030358D DE 516999 C DE516999 C DE 516999C
Authority
DE
Germany
Prior art keywords
preparation
aromatic amines
iron
salts
nitro compounds
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
DEI30358D
Other languages
German (de)
Inventor
Dr Julius Laux
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 DEI30358D priority Critical patent/DE516999C/en
Application granted granted Critical
Publication of DE516999C publication Critical patent/DE516999C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/22—Compounds of iron
    • C09C1/24—Oxides of iron

Landscapes

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

Description

Durch das Hauptpatent 515 758 ist ein Verfahren geschützt, welches gestattet, das bei der Reduktion von aromatischen Nitroverbindungen zu den entsprechenden Aminen verwendete Eisen in Form eines zur Herstellung von Pigmentfarben technisch wertvollen Hydroxyds wiederzugewinnen, und das darin besteht, die Reduktion in Gegenwart von wäßrigen Aluminiumsalzlösungen auszuführen. A method is protected by the main patent 515 758, which allows that in the reduction of aromatic nitro compounds to the corresponding amines used iron in the form of a for the production to recover technically valuable hydroxide from pigment dyes, and that consists in reducing it in the presence to run from aqueous aluminum salt solutions.

In weiterer Verfolgung des Erfindungsgedankens wurde beobachtet, daß ähnliche Wirkungen erzfeit werden, wenn man an Stelle der Salze des Aluminiums Salze von anderen drei- oder vierwertigen Metallen anwendet. Als solche kommen beispielsweise Chrom, die Metalle der seltenen Erden sowie Cer und Thorium in Betracht.In further pursuit of the inventive concept, it was observed that similar Effects are eradicated if salts of other trivalent or tetravalent metals are used in place of the salts of aluminum. Chromium, rare earth metals, cerium and thorium can be considered as such.

BeispieleExamples

ι. 200 kg Nitrobenzol werden in eine Lösung von 40 kg Cerchlorid in 300 1 Wasser, in der sich 200 kg Eisenspäne befinden, unter Rühren zulaufen gelassen; die Reduktion undι. 200 kg of nitrobenzene are in a solution of 40 kg of cerium chloride in 300 l of water containing 200 kg of iron filings Allowed to stir; the reduction and

«5 die Gewinnung des entstandenen Anilins werden in der üblichen Weise ausgeführt. Nach der Entfernung des Anilins hinterbleibt ein Eisenhydroxyd von leuchtend brauner Farbe. 2. Man arbeitet in gleicher Weise, wie in Beispiel 1 angegeben, aber unter Verwendung von nur 5 kg Cerchlorid und 250 1 Wasser. In diesem Fall ist das erhaltene Eisenhydroxyd von violetter Farbe.The extraction of the aniline produced is carried out in the usual way. To the removal of the aniline leaves an iron hydroxide of a bright brown color. 2. One works in the same way as indicated in Example 1, but using from only 5 kg of cerium chloride and 250 l of water. In this case the obtained is iron hydroxide of purple color.

3. Zu einer Mischung von 200 kg o-Nitrotoluol mit einer Lösung von 20 kg Lanthanchlorid in 250 1 Wasser gibt man allmählich 200 kg Eisen und arbeitet die Reduktion, wie üblich, auf. Man erhält ein blaustichig rotes Eisenhydroxyd.3. To a mixture of 200 kg of o-nitrotoluene with a solution of 20 kg of lanthanum chloride 200 kg of iron are gradually added to 250 l of water and the reduction is carried out as if common on. A bluish red iron hydroxide is obtained.

4. Man reduziert 200 kg p-Nitrochlorbenzol mittels einer Lösung von 5 kg Didymchlorid in 2001 Wasser, welche sich über 200 kg Eisen befindet. Das entstehende Eisenhydroxyd ist von dunkelbraunroter Farbe.4. 200 kg of p-nitrochlorobenzene are reduced by means of a solution of 5 kg of didymium chloride in 2001 water, which is about 200 kg of iron is located. The resulting iron hydroxide is dark brown-red in color.

An Stelle der in den Beispielen genannten aromatischen Nitroverbindungen können andere Analoge und Substitutionsprodukte des Nitrobenzols Verwendung finden.Instead of the aromatic nitro compounds mentioned in the examples, other analogues and substitution products of nitrobenzene are used.

Claims (1)

Patentanspruch:Claim: Abänderung des durch Patent 515758 geschützten Verfahrens zur Herstellung aromatischer Amine durch Reduktion der entsprechenden Nitroverbindungen mit Eisen, darin bestehend, daß man an Stelle der dort verwendeten wäßrigen Aluminiumsalzlösungen wäßrige Lösungen von Salzen anderer drei- oder vierwertiger Metalle verwendet.Modification of the patent 515758 protected process for the preparation of aromatic amines by reducing the corresponding nitro compounds with Iron, consisting in that instead of the aqueous aluminum salt solutions used there aqueous solutions of salts of other trivalent or tetravalent metals are used. *) Von dem Patentsucher ist als der Erfinder angegeben worden:*) The patent seeker stated as the inventor: Dr. Julius Laux in Uerdmgen.Dr. Julius Laux in Uerdmgen.
DEI30358D 1927-02-16 1927-02-16 Process for the preparation of aromatic amines Expired DE516999C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI30358D DE516999C (en) 1927-02-16 1927-02-16 Process for the preparation of aromatic amines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI30358D DE516999C (en) 1927-02-16 1927-02-16 Process for the preparation of aromatic amines

Publications (1)

Publication Number Publication Date
DE516999C true DE516999C (en) 1931-01-29

Family

ID=7187600

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI30358D Expired DE516999C (en) 1927-02-16 1927-02-16 Process for the preparation of aromatic amines

Country Status (1)

Country Link
DE (1) DE516999C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2826941A1 (en) * 1978-06-20 1980-01-10 Bayer Ag METHOD FOR PRODUCING IRON OXIDE RED PIGMENTS
US5665157A (en) * 1995-10-26 1997-09-09 Bayer Ag Clean color shade, yellow-tinged red iron oxide pigments, and a process for their manufacture, and their use
JPH11240724A (en) * 1997-11-19 1999-09-07 Bayer Ag Iron oxide yellow pigment stable to heat

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2826941A1 (en) * 1978-06-20 1980-01-10 Bayer Ag METHOD FOR PRODUCING IRON OXIDE RED PIGMENTS
US5665157A (en) * 1995-10-26 1997-09-09 Bayer Ag Clean color shade, yellow-tinged red iron oxide pigments, and a process for their manufacture, and their use
JPH11240724A (en) * 1997-11-19 1999-09-07 Bayer Ag Iron oxide yellow pigment stable to heat

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