Invention Grant
US07947845B2 Process for purifying removal of acrylic acid, methacrylic acid N-vinylpyrrolidone or P-xylene crystals from their suspension in mother liquor
有权
在母液中从其悬浮液中净化丙烯酸，甲基丙烯酸N-乙烯基吡咯烷酮或对二甲苯晶体的方法
- Patent Title: Process for purifying removal of acrylic acid, methacrylic acid N-vinylpyrrolidone or P-xylene crystals from their suspension in mother liquor
- Patent Title (中): 在母液中从其悬浮液中净化丙烯酸，甲基丙烯酸N-乙烯基吡咯烷酮或对二甲苯晶体的方法
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Application No.: US12170002Application Date: 2008-07-09
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Publication No.: US07947845B2Publication Date: 2011-05-24
- Inventor: Joerg Heilek , Ulrich Hammon , Klaus Joachim Mueller-Engel , Dieter Baumann
- Applicant: Joerg Heilek , Ulrich Hammon , Klaus Joachim Mueller-Engel , Dieter Baumann
- Applicant Address: DE Ludwigshafen
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: DE102007032633 20070711
- Main IPC: C07D207/267
- IPC: C07D207/267
Abstract:
A process for purifying removal of acrylic acid, methacrylic acid, N-vinylpyrrolidone or p-xylene crystals from their suspension in mother liquor by means of a wash column with forced transport, whose shell of the process chamber is a metal wall, the wash column additionally being enveloped by a thermal insulation material having a water vapor barrier and a specific heat flow of >0.1 W/m2 and
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