公开(公告)号：US4874403A

公开(公告)日：1989-10-17

申请号：US232497

申请日：1988-08-15

申请人： Toshiharu Hasumoto ,  Kunio Kashiwada ,  Minoru Konishi ,  Nobuo Fujishiro

发明人： Toshiharu Hasumoto ,  Kunio Kashiwada ,  Minoru Konishi ,  Nobuo Fujishiro

IPC分类号： B01D53/14 ,  B01D53/70

CPC分类号： B01D53/70 ,  B01D53/14 ,  B01D53/1493 ,  Y02C20/30

摘要： A method of treating a trichlorotrifluoroethane containing waste gas. The trichlorotrifluoroethane waste gas is contacted at atmospheric pressure or under pressurized conditions with at least one absorber selected from the group consisting of saturated mineral oils, alkyl dipheny ether based oils, silicone oils, trichlorotrifluoroethane based oils, and perfluoropolyether based oils, having a vapor pressure of not higher than 7.6.times.10.sub.2 mmHg at 25.degree. C. and a viscosity of not higher than 500 cp at 25.degree. C., to remove trichlorotrifluoroethane contained in the waste gas by absorbing, and depressurizing the absorber having absorbed therein trichlorotrifluoroethane to recover trichlorotrifluoroethane.

公开(公告)号：US06280597B1

公开(公告)日：2001-08-28

申请号：US09152291

申请日：1998-09-14

申请人： Kunio Kashiwada ,  Takanori Kodama ,  Hiroyasu Taguchi ,  Satoshi Hirano

发明人： Kunio Kashiwada ,  Takanori Kodama ,  Hiroyasu Taguchi ,  Satoshi Hirano

IPC分类号： C23C834

CPC分类号： C23C8/34 ,  C23C8/02

摘要： The known flourinated layer has usually a thickness of from 1000 to 3000 angstroms. After the forced oxidation of metal, the forcibly oxidized surface is flourinated. As a result of the preceding forcing oxidation, a 1 &mgr;m or more thick fluorinated layer is formed on the surface of the metal.

摘要翻译： 已知的增白层通常具有1000至3000埃的厚度。 金属被强制氧化后，强制氧化的表面被粉化。 作为上述强制氧化的结果，在金属的表面上形成1μm以上的氟化层。