发明名称 |
Process for preparation of high purity methacrylic acid |
摘要 |
The present invention relates to a process for preparation of pure methacrylic acid, at least comprising the process steps: a) gas phase oxidation of a C4 compound to obtain a methacrylic acid-comprising gas phase, b) condensation of the methacrylic acid-comprising gas phase to obtain an aqueous methacrylic acid solution, c) separation of at least a part of the methacrylic acid from the aqueous methacrylic acid solution to obtain at least one crude methacrylic acid-comprising product; d) separation of at least a part of the methacrylic acid from the at least one crude methacrylic acid-comprising product by means of a thermal separation process to obtain a pure methacrylic acid. |
申请公布号 |
US8426637(B2) |
申请公布日期 |
2013.04.23 |
申请号 |
US20080810098 |
申请日期 |
2008.11.17 |
申请人 |
KOESTNER MARTIN;KOELBL GERHARD;MEIER RALF;EVONIK ROEHM GMBH |
发明人 |
KOESTNER MARTIN;KOELBL GERHARD;MEIER RALF |
分类号 |
C07C51/16;C07C51/42;C07C69/52;C08F20/06 |
主分类号 |
C07C51/16 |
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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