发明名称 |
PROCESS FOR THE PRODUCTION OF METHACRYLIC ACID FROM ISOBUTYRALDEHYDE |
摘要 |
To produce methacrylic acid, firstly, isobutyraldehyde is acetalized. The resultant acetal is cleaved into the isobutenyl ether and alcohol. The isobutenyl ether is oxidized with molecular oxygen or an oxygen-containing gaseous mixture in the presence of an alkaline solution at temperatures of 30 DEG -70 DEG C. to obtain the epoxide. This epoxide is hydrolyzed to the alpha -hydroxyisobutyraldehyde. The latter is then oxidized with concentrated or fuming nitric acid at temperatures of 20 DEG -110 DEG C. to produce alpha -hydroxyisobutyric acid, and methacrylic acid is obtained therefrom by splitting off water. |
申请公布号 |
EP0079432(B1) |
申请公布日期 |
1984.10.24 |
申请号 |
EP19820107737 |
申请日期 |
1982.08.24 |
申请人 |
CHEMISCHE WERKE HULS AG |
发明人 |
BROCKHAUS, RUDOLF, DR.;FRANKE, HANS-JURGEN |
分类号 |
C07C41/28;C07C41/56;C07C45/51;C07C45/58;C07C51/00;C07C51/27;C07C57/05;C07C57/065;C07C67/00;C07D303/48;(IPC1-7):07C57/04;07C51/00 |
主分类号 |
C07C41/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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