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公开(公告)号:US4001332A
公开(公告)日:1977-01-04
申请号:US639110
申请日:1975-12-09
申请人: Gunter Mau , Gunter Jacobsen , Erich Brandes
发明人: Gunter Mau , Gunter Jacobsen , Erich Brandes
CPC分类号: C07C45/90
摘要: Ketene is compressed by means of a liquid ring pump using ketene-containing diketene as operating liquid.