GB1017646A - Preparation of aromatic amino compounds - Google Patents
Preparation of aromatic amino compoundsInfo
- Publication number
- GB1017646A GB1017646A GB1693363A GB1693363A GB1017646A GB 1017646 A GB1017646 A GB 1017646A GB 1693363 A GB1693363 A GB 1693363A GB 1693363 A GB1693363 A GB 1693363A GB 1017646 A GB1017646 A GB 1017646A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aromatic
- solvent
- catalyst
- nickel
- mixed solvent
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/30—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds
- C07C209/32—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups
- C07C209/36—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups by reduction of nitro groups bound to carbon atoms of six-membered aromatic rings in presence of hydrogen-containing gases and a catalyst
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
In a process for the preparation of aromatic amino compounds in a mixed solvent there is uses for the catalytic reduction of an aromatic nitro compound in liquid phase in the presence of a catalyst preferably a nickel catalyst, a mixture of a lower alcohol and an aromatic solvent as the reaction solvent. The mixed solvent preferably contains 40-5% by weight of an alcohol and 60-95% by weight of aromatic solvent. Specified lower alcohols are methanol, ethanol, n-propanol, isopropanol. Specified aromatic solvents are benzene, toluene, xylene and halogenated benzenes such as monochlorobenzene, orthodichlorobenzene, metadichlorobenzene, paradichlorobenzene, mixed dichlorobenzenes, trichlorobenzene, bromobenzene. In an example a mixture of 2,4- and 2,6-dinitro-toluenes (2,4-isomer about 80% and 2,6-isomer about 20%), a mixed solvent of 142.5 parts of a dichlorobenzene and 7.5 parts of methanol, and finally a nickel-talc catalyst containing an amount of nickel corresponding to 0.5% per the amount of dinitrotoluene are fed sequentially into an autoclave and the reaction carried out under a pressure of 50 kg./cm.2, at 100 DEG C., and is finished after 40 minutes, the catalyst being filtrated off and tolylenediamine of 99% or higher in purity is obtained by distillation. Other examples are given.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1885762 | 1962-05-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1017646A true GB1017646A (en) | 1966-01-19 |
Family
ID=11983194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1693363A Expired GB1017646A (en) | 1962-05-08 | 1963-04-30 | Preparation of aromatic amino compounds |
Country Status (3)
| Country | Link |
|---|---|
| BR (1) | BR6348978D0 (en) |
| CH (1) | CH409990A (en) |
| GB (1) | GB1017646A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4720326A (en) * | 1986-03-08 | 1988-01-19 | Bayer Aktiengesellschaft | Process for working-up aqueous amine solutions |
| US5563296A (en) * | 1993-07-15 | 1996-10-08 | Bayer Aktiengesellschaft | Continuous process for preparing aromatic amines |
| US7575660B2 (en) | 2004-06-01 | 2009-08-18 | Bayer Materialscience Ag | Process for the distillative separation of aqueous amine solutions |
-
1963
- 1963-04-30 GB GB1693363A patent/GB1017646A/en not_active Expired
- 1963-05-07 CH CH573463A patent/CH409990A/en unknown
- 1963-05-08 BR BR14897863A patent/BR6348978D0/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4720326A (en) * | 1986-03-08 | 1988-01-19 | Bayer Aktiengesellschaft | Process for working-up aqueous amine solutions |
| US5563296A (en) * | 1993-07-15 | 1996-10-08 | Bayer Aktiengesellschaft | Continuous process for preparing aromatic amines |
| US7575660B2 (en) | 2004-06-01 | 2009-08-18 | Bayer Materialscience Ag | Process for the distillative separation of aqueous amine solutions |
Also Published As
| Publication number | Publication date |
|---|---|
| CH409990A (en) | 1966-03-31 |
| BR6348978D0 (en) | 1973-07-17 |
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