GB801534A - A process for the preparation of an unsymmetrical dialkylhydrazine - Google Patents
A process for the preparation of an unsymmetrical dialkylhydrazineInfo
- Publication number
- GB801534A GB801534A GB3509256A GB3509256A GB801534A GB 801534 A GB801534 A GB 801534A GB 3509256 A GB3509256 A GB 3509256A GB 3509256 A GB3509256 A GB 3509256A GB 801534 A GB801534 A GB 801534A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nickel
- palladium
- hydrogen
- dialkylhydrazine
- unsymmetrical
- 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
- C07C243/00—Compounds containing chains of nitrogen atoms singly-bound to each other, e.g. hydrazines, triazanes
- C07C243/10—Hydrazines
- C07C243/12—Hydrazines having nitrogen atoms of hydrazine groups bound to acyclic carbon atoms
- C07C243/14—Hydrazines having nitrogen atoms of hydrazine groups bound to acyclic carbon atoms of a saturated carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C241/00—Preparation of compounds containing chains of nitrogen atoms singly-bound to each other, e.g. hydrazines, triazanes
- C07C241/02—Preparation of hydrazines
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Unsymmetrical dialkylhydrazines are prepared by reacting hydrogen at superatmospheric pressure with the corresponding dialkylnitrosamine in the presence of a nickel, copper chromite or palladium hydrogenation catalyst. Reaction temperatures of 0 DEG to 100 DEG C. are suitable for the nickel or palladium catalysts and those from 0 DEG to 175 DEG C. are suitable for the copper chromite catalyst. Raney nickel and palladium supported on alumina are preferred forms of the nickel and palladium catalysts, respectively. Preferred hydrogen pressures are between 1200 and 2000 p.s.i.g. The reaction may be carried out with or without aqueous or non-aqueous solvents. For continuous working a dialkylnitrosoamine is made to flow downwards through a catalyst bed contained in a vertically arranged cylindrical vessel, in which suitable superatmospheric hydrogen pressures are maintained; unreacted hydrogen and dialkylnitrosamine are separated from the dialkylhydrazine and are recycled. The examples describe the preparation of dimethylhydrazine, methylethylhydrazine, diethylhydrazine, di-n-propylhydrazine and di-n-butylhydrazine.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3509256A GB801534A (en) | 1956-11-16 | 1956-11-16 | A process for the preparation of an unsymmetrical dialkylhydrazine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3509256A GB801534A (en) | 1956-11-16 | 1956-11-16 | A process for the preparation of an unsymmetrical dialkylhydrazine |
Publications (1)
Publication Number | Publication Date |
---|---|
GB801534A true GB801534A (en) | 1958-09-17 |
Family
ID=10373703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3509256A Expired GB801534A (en) | 1956-11-16 | 1956-11-16 | A process for the preparation of an unsymmetrical dialkylhydrazine |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB801534A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3167588A (en) * | 1959-12-01 | 1965-01-26 | Allied Chem | Catalytic hydrogenation of nitrosodialkylamines to produce unsymmetrical dialkylhydrazines |
-
1956
- 1956-11-16 GB GB3509256A patent/GB801534A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3167588A (en) * | 1959-12-01 | 1965-01-26 | Allied Chem | Catalytic hydrogenation of nitrosodialkylamines to produce unsymmetrical dialkylhydrazines |
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