GB1146233A - Preparation of hydrazodicarbonamide and azodicarbonamide - Google Patents
Preparation of hydrazodicarbonamide and azodicarbonamideInfo
- Publication number
- GB1146233A GB1146233A GB6918/67A GB691867A GB1146233A GB 1146233 A GB1146233 A GB 1146233A GB 6918/67 A GB6918/67 A GB 6918/67A GB 691867 A GB691867 A GB 691867A GB 1146233 A GB1146233 A GB 1146233A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hydrazodicarbonamide
- azodicarbonamide
- hydrazine
- recovered
- stage
- 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
- C07C241/00—Preparation of compounds containing chains of nitrogen atoms singly-bound to each other, e.g. hydrazines, triazanes
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
1,146,233. Preparation of hydrazodicarbonamide and azodicarbonamide. H. G. C. FAIRWEATHER (Fairmount Chemical Co. Inc.). 14 Feb., 1967, No. 6918/67. Heading C2C. Hydrazodicarbonamide is obtained by reacting urea with hydrazine in an aqueous alkaline medium with a molar ratio of urea to hydrazine of at least 2 under refluxing conditions to form initially semicarbazide and eventually hydrazodicarbonamide with simultaneous release of ammonia. The reaction may be effected in a first stage at 105-185 C. and in a second stage at 115-135 C. and the starting material may be the synthesis liquor obtained from a hydrazine production plant. The above product may be recovered or oxidized, preferably in situ, by the addition of at least a stoichiometric amount of an alkali metal chlorate and a small amount of a catalyst and the azodicarbonamide thus formed, recovered. The oxidation reaction is preferably effected at 60-105 C., the alkali metal chlorate may be sodium chlorate and a specified catalyst is ammonium metavanadate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB6918/67A GB1146233A (en) | 1967-02-14 | 1967-02-14 | Preparation of hydrazodicarbonamide and azodicarbonamide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB6918/67A GB1146233A (en) | 1967-02-14 | 1967-02-14 | Preparation of hydrazodicarbonamide and azodicarbonamide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1146233A true GB1146233A (en) | 1969-03-19 |
Family
ID=9823230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6918/67A Expired GB1146233A (en) | 1967-02-14 | 1967-02-14 | Preparation of hydrazodicarbonamide and azodicarbonamide |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1146233A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1174420A1 (en) * | 2000-07-19 | 2002-01-23 | Bayer Aktiengesellschaft | Process for the preparation of hydrazodicarbonamide (HDC) through ketimines |
| EP1900725A3 (en) * | 2004-03-20 | 2010-08-04 | LANXESS Deutschland GmbH | Process for the preparation of azodicarbonamide |
| CN106748895A (en) * | 2015-11-25 | 2017-05-31 | 衡阳市锦轩化工有限公司 | A kind of processing method of ADC foaming agent condensed mother liquors |
-
1967
- 1967-02-14 GB GB6918/67A patent/GB1146233A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1174420A1 (en) * | 2000-07-19 | 2002-01-23 | Bayer Aktiengesellschaft | Process for the preparation of hydrazodicarbonamide (HDC) through ketimines |
| US6472560B2 (en) | 2000-07-19 | 2002-10-29 | Bayer Aktiengesellschaft | Process for preparing hydrazodicarbonamide via ketimines |
| EP1900725A3 (en) * | 2004-03-20 | 2010-08-04 | LANXESS Deutschland GmbH | Process for the preparation of azodicarbonamide |
| CN106748895A (en) * | 2015-11-25 | 2017-05-31 | 衡阳市锦轩化工有限公司 | A kind of processing method of ADC foaming agent condensed mother liquors |
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