发明授权
- 专利标题: Recovery of phthalic anhydride
- 专利标题(中): 回收邻苯二甲酸酐
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申请号: US589566申请日: 1975-06-23
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公开(公告)号: US4008255A公开(公告)日: 1977-02-15
- 发明人: Friedrich Wirth , Wolfgang Kube , Paul Hornberger , Otto Leman , Joachim Wagner , Dieter Karau
- 申请人: Friedrich Wirth , Wolfgang Kube , Paul Hornberger , Otto Leman , Joachim Wagner , Dieter Karau
- 申请人地址: DT Ludwigshafen (Rhine)
- 专利权人: BASF Aktiengesellschaft
- 当前专利权人: BASF Aktiengesellschaft
- 当前专利权人地址: DT Ludwigshafen (Rhine)
- 优先权: DT2313306 19730317
- 主分类号: C07C51/573
- IPC分类号: C07C51/573 ; C07D307/89
摘要:
Process for the recovery of phthalic anhydride in which gases as obtained in the catalytic atmospheric oxidation of o-xylene or naphthalene are treated with a hydrocarbon containing C.sub.26.sub.- paraffins, cooling, if necessary, the hydrocarbon laden with phthalic anhydride, separating the solid phthalic anhydride followed by melting and distillation thereof.
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