公开(公告)号：US4202766A

公开(公告)日：1980-05-13

申请号：US917844

申请日：1978-06-22

申请人： Hiroshi Ono ,  Toyoyasu Saida ,  Kunimitsu Fukumura

发明人： Hiroshi Ono ,  Toyoyasu Saida ,  Kunimitsu Fukumura

IPC分类号： B01D17/02 ,  C02F1/52 ,  C02C5/02

CPC分类号： C02F1/5236 ,  B01D17/0202

摘要： A process for the separation of oil from waste water containing the same in the form of fine particles, comprising introducing a hydroxide or oxide of calcium or a mixture thereof into the waste water for adsorbing the oil on the hydroxide or oxide and/or coagulating the oil, adding an acid or an alkali to the waste water for dissolving the oil-adsorbing hydroxide or oxide to liberate the oil, and separating the liberated oil from the waste water.

摘要翻译： 一种用于从含有微粒形式的废水中分离油的方法，包括将氢氧化物或其氧化物或其混合物引入废水中以将油吸附在氢氧化物或氧化物上和/或凝结 油，向废水中添加酸或碱以溶解吸油氢氧化物或氧化物以释放油，并将废水与废水分离。

公开(公告)号：US5175309A

公开(公告)日：1992-12-29

申请号：US448185

申请日：1989-12-08

申请人： Ryuichiro Tsumura ,  Kunimitsu Fukumura ,  Teruo Muraishi

发明人： Ryuichiro Tsumura ,  Kunimitsu Fukumura ,  Teruo Muraishi

IPC分类号： B01J23/06 ,  C07D207/44 ,  C07D207/448 ,  C07D207/452

CPC分类号： C07D207/448 ,  C07D207/452

摘要： A process for the preparation of N-substituted maleimides by conducting heat-dehydration and dehydrating imidization of N-substituted maleamic acids under azeotropic distillation of generated water in a solvent mixture containing a solvent capable of forming water azeotrope and an organic aprotic polar solvent, in the presence as catalyst of a zinc salt of a maleamic acid, metallic zinc or a zinc compound which forms a zinc salt of the N-substituted maleamic acid in the reaction system.