JPS57203051A - Preparation of malononitrile - Google Patents
Preparation of malononitrileInfo
- Publication number
- JPS57203051A JPS57203051A JP8747081A JP8747081A JPS57203051A JP S57203051 A JPS57203051 A JP S57203051A JP 8747081 A JP8747081 A JP 8747081A JP 8747081 A JP8747081 A JP 8747081A JP S57203051 A JPS57203051 A JP S57203051A
- Authority
- JP
- Japan
- Prior art keywords
- alkyl
- cyanoacetaldehyde
- acetal
- simplified
- raw material
- 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.)
- Pending
Links
Abstract
PURPOSE: To prepare the titled compound useful as a raw material of vitamin B1, in high yield and selectivity, economically in an industrial scale, by treating cyanoacetaldehyde acetal in an aqueous solution of an acid, and reacting with hydroxylamine-o-sulfonic acid.
CONSTITUTION: The cyanoacetaldehyde acetal of formula (R is H, alkyl, etc.; R' is alkyl, etc.; the H in the alkyl groups R and R' may be substituted with halogen, etc.) is treated in an acidic aqueous solution (e.g. sulfuric acid solution) at 20W100°C, and made to react with hydroxyalmine-o-sulfonic acid at 0W 100°C to obtain the objective compound.
EFFECT: Since the reaction process is simplified, the safety of the raw material is high and the corrosion of the apparauts to inhibited compared with the conventional process, the treatment of the waste water and waste liquid can be simplified, and the necessity of using a reaction apparatus made of a particular material can be eliminated.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8747081A JPS57203051A (en) | 1981-06-09 | 1981-06-09 | Preparation of malononitrile |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8747081A JPS57203051A (en) | 1981-06-09 | 1981-06-09 | Preparation of malononitrile |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57203051A true JPS57203051A (en) | 1982-12-13 |
Family
ID=13915787
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8747081A Pending JPS57203051A (en) | 1981-06-09 | 1981-06-09 | Preparation of malononitrile |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57203051A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6353126B1 (en) | 1999-06-30 | 2002-03-05 | Creanova Inc. | Process for the production of malononitrile |
-
1981
- 1981-06-09 JP JP8747081A patent/JPS57203051A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6353126B1 (en) | 1999-06-30 | 2002-03-05 | Creanova Inc. | Process for the production of malononitrile |
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