发明名称 |
Regenerating a catalyst having a heteropoly acid compound, useful to prepare methacrylic acid, comprises heat-treating a mixture containing deactivated catalyst, an ammonium-, a nitrate- ion and water, drying and calcinating the mixture |
摘要 |
<p>Regeneration of a catalyst comprising a heteropoly acid compound containing phosphorus and molybdenum, for the preparation of methacrylic acid, comprises heat-treating a mixture containing deactivated catalyst, an ammonium ion, a nitrate ion and water at at least 100[deg] C, and drying and calcinating the mixture. An independent claim is included for the preparation of methacrylic acid comprising regenerating the catalyst, by the above process, and subjecting a gas phase oxidation of at least a compound methacrolein, isobutyraldehyde, isobutane or isobutyric acid in the presence of the regenerated catalyst.</p> |
申请公布号 |
DE102007045282(A1) |
申请公布日期 |
2008.05.15 |
申请号 |
DE20071045282 |
申请日期 |
2007.09.21 |
申请人 |
SUMITOMO CHEMICAL CO. LTD. |
发明人 |
YOSHIZAWA, JUNYA;OHISHI, YOSHIHIKO;SHIRAISHI, EIICHI |
分类号 |
C07C57/05;B01J27/186;B01J27/28;B01J38/64;B01J38/66 |
主分类号 |
C07C57/05 |
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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