发明名称 |
PROCESS FOR PRODUCING (METH)ACRYLIC ACID WITH TREATMENT OF THE HIGH-BOILING FRACTION BY CRYSTALLISATION |
摘要 |
A process for production of (meth)acrylic acid is disclosed. The process includes synthesizing and distillatively working-up a crude (meth)acrylic acid phase to obtain a (meth)acrylic acid phase and a dimer phase including (meth)acrylic acid dimers and/or (meth)acrylic acid oligomers. At least a part of the (meth)acrylic acid dimers and/or of the (meth)acrylic acid oligomers from the dimer phase is split to obtain a (meth)acrylic acid including a low-boiling phase and a high-boiling phase including less (meth)acrylic acid than the low-boiling phase. At least a part of the (meth)acrylic acid from the low-boiling phase is separated by forming of one or more crystals to obtain a pure (meth)acrylic acid and a residue. Also disclosed is a device for production of (meth)acrylic acid, a process for production of a polymer as well as chemical products based on or including (meth)acrylic acid or a polymer as well as the use of (meth)acrylic acid or polymers in chemical products. |
申请公布号 |
EP1926700(B1) |
申请公布日期 |
2017.03.01 |
申请号 |
EP20060776791 |
申请日期 |
2006.08.11 |
申请人 |
Evonik Degussa GmbH |
发明人 |
BALDUF, Torsten;BUB, Günther;MOSLER, Jürgen;SABBAGH, Andreas;KOHN, Jürgen;SELBACH, Arndt |
分类号 |
C08J3/00;C07C51/43 |
主分类号 |
C08J3/00 |
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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