GB895197A - Catalytic reduction of aromatic dinitro compounds - Google Patents
Catalytic reduction of aromatic dinitro compoundsInfo
- Publication number
- GB895197A GB895197A GB40572/60A GB4057260A GB895197A GB 895197 A GB895197 A GB 895197A GB 40572/60 A GB40572/60 A GB 40572/60A GB 4057260 A GB4057260 A GB 4057260A GB 895197 A GB895197 A GB 895197A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diamine
- stream
- dinitro compound
- water
- reaction zone
- 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
Abstract
In a process for the hydrogenation of aromatic dinitro compounds to the corresponding aromatic diamines in the presence of a catalyst containing nickel or a platinum group metal, an agitated body of water and diamine formed by the reduction and having the catalyst suspended therein is maintained in the reaction zone, a stream of undiluted aromatic dinitro compound and a stream of hydrogen are continuously introduced into the mixture of water and diamine, a stream of diamine and water formed by the reduction is continuously withdrawn from the reaction zone in a molar amount equivalent to the molar amount of dinitro compound introduced, a single liquid phase of dinitro compound, diamine and water being maintained in the reaction zone and the rate of introduction of the dinitro compound into the zone controlled so that the stream removed therefrom is essentially free of unreduced dinitro compound. An example describes, with reference to a flow chart, the hydrogenation of dinitrotoluene to tolylene diamine in the presence of palladised charcoal. Specification 805,249 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB40572/60A GB895197A (en) | 1960-11-25 | 1960-11-25 | Catalytic reduction of aromatic dinitro compounds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB40572/60A GB895197A (en) | 1960-11-25 | 1960-11-25 | Catalytic reduction of aromatic dinitro compounds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB895197A true GB895197A (en) | 1962-05-02 |
Family
ID=10415565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB40572/60A Expired GB895197A (en) | 1960-11-25 | 1960-11-25 | Catalytic reduction of aromatic dinitro compounds |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB895197A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3472897A (en) * | 1966-12-22 | 1969-10-14 | Grace W R & Co | Reduction of nitrobenzene |
| US5849947A (en) * | 1995-08-04 | 1998-12-15 | Bayer Aktiengesellschaft | Process for the preparation of toluylene diisocyanate, specific mixtures of toluylene diamine and water, and the use of toluylene diamine and water mixtures to prepare toluylene diisocyanate |
| WO2002000598A2 (en) * | 2000-06-29 | 2002-01-03 | Dow Global Technologies Inc. | Process for the production of aromatic amines |
-
1960
- 1960-11-25 GB GB40572/60A patent/GB895197A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3472897A (en) * | 1966-12-22 | 1969-10-14 | Grace W R & Co | Reduction of nitrobenzene |
| US5849947A (en) * | 1995-08-04 | 1998-12-15 | Bayer Aktiengesellschaft | Process for the preparation of toluylene diisocyanate, specific mixtures of toluylene diamine and water, and the use of toluylene diamine and water mixtures to prepare toluylene diisocyanate |
| US6472564B1 (en) * | 1995-08-04 | 2002-10-29 | Bayer Aktiengesellschaft | Process for the preparation of toluylene diisocyanate, specific mixtures of toluylene diamine and water, and the use of toluylene diamine and water mixtures to prepare toluylene diisocyanate |
| WO2002000598A2 (en) * | 2000-06-29 | 2002-01-03 | Dow Global Technologies Inc. | Process for the production of aromatic amines |
| WO2002000598A3 (en) * | 2000-06-29 | 2002-05-16 | Enichem Spa | Process for the production of aromatic amines |
| KR100754755B1 (en) | 2000-06-29 | 2007-09-04 | 다우 글로벌 테크놀로지스 인크. | Process for the production of aromatic amines |
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