发明授权
- 专利标题： Purification and decolorization of off-color alkyl alkanolamines
- 专利标题（中）： 异色烷基链烷醇胺的纯化和脱色
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申请号： US939532申请日： 1992-09-01
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公开(公告)号： US5208377A公开(公告)日： 1993-05-04
- 发明人: Thomas H. Overgaard , Louis P. Verduce
- 申请人： Thomas H. Overgaard , Louis P. Verduce
- 申请人地址： PA Philadelphia
- 专利权人： Elf Atochem North America, Inc.
- 当前专利权人： Elf Atochem North America, Inc.
- 当前专利权人地址： PA Philadelphia
- 主分类号： C07C213/10
- IPC分类号： C07C213/10
摘要：
Off-color N-(C.sub.4 -C.sub.10)alkyl di(C.sub.2 -C.sub.3) alkanolamines purified and decolorized by vacuum distillation at a pressure within the range of 1 to 50 mm.Hg (1-50 torr) in the presence of water and or water-soluble metal borohydride whereby the distilled alkanolamine has a reduced APHA color rating which is maintained on storage.
公开/授权文献
- US4185689A Casing bridge plug with push-out pressure equalizer valve 公开/授权日：1980-01-29
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