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公开(公告)号:US4676889A
公开(公告)日:1987-06-30
申请号:US584022
申请日:1984-02-27
CPC分类号: B01D11/0257 , C10G1/006
摘要: Bitumen recovered from tar sand by direct solvent extraction followed by washing of the sand tailings with countercurrent solvent flow and a solvent/aqueous phase separation step to recover solvent and residual bitumen.
摘要翻译: 沥青通过直接溶剂萃取从焦油砂中回收,随后用逆流溶剂流和溶剂/水相分离步骤洗涤尾矿以回收溶剂和残余沥青。