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    • 4. 发明申请
    • EXTRACTION OF BENZOL AND BENZOL DERIVATIVES FROM GASOLINE FRACTIONS AND REFINERY FLOWS
    • 从PETROL和RAFFINERIESTRÖMEN中提取苯和苯的收集
    • WO2009024259A2
    • 2009-02-26
    • PCT/EP2008006415
    • 2008-08-05
    • UHDE GMBHNOLL OLIVERGEHRKE HELMUTLUEBBECKE CHRISTIANKOLBE BAERBEL
    • NOLL OLIVERGEHRKE HELMUTLUEBBECKE CHRISTIANKOLBE BAERBEL
    • B01D3/40C07C7/08C07C15/04C07C15/06C07C15/08C10G7/08
    • C07C7/10B01D3/40C07C7/08C07C15/04C07C15/06C07C15/08C10G2400/06
    • The invention relates to a method for separating the aromatic compounds benzol, toluene, and XyIoI from a reformate and pyrolysis gasoline containing aromatic compounds, or a coke benzol, or a refinery flow containing aromatic compounds, wherein extractive distillation is utilized for separating the aromatic compounds, using a novel solvent combination made up of the compounds N,N'-diformyl piperazine or 2,2'-bis-(cyan ethyl)ether in combination with N formyl morpholine as the second solvent for the extractive distillation such that the solvent combination obtained has an increased selectivity with regard to the aromatic compounds to be extracted, such that a reduced solvent charge may be utilized, wherein the mixture containing aromatic compounds utilized is initially subjected to a pre-distillation such that the faction obtained has a very limited boiling point, and that this fraction is then subjected to an extractive distillation in a first column, wherein a head product depleted of aromatic compounds, predominantly having paraffinic hydrocarbons and a sump product enriched with aromatic compounds are obtained, which are transferred into a second column, in which a raffinate rich in aromatic compounds is obtained by means of reduction of the pressure, or increase of the temperature such that the extracted solvent combination obtained as the sump product can be returned to the process.
    • 本发明涉及一种用于芳族化合物:苯,甲苯和二甲苯的从重整和裂解汽油或焦炉或含芳香族的炼油厂流,其包括采用萃取蒸馏芳烃分离含芳族化合物中,N的新型溶剂组合从化合物中分离 N'二甲酰基哌嗪或2,2'-双(氰基乙基)醚组合使用与N-甲酰基吗啉作为萃取蒸馏的第二溶剂,使得到的溶剂组合具有相对于芳烃的选择性增加要被提取,因此 它管理与低级溶剂加载,其中所述含芳族进料混合物首先进行初步精馏,以便所获得的级分具有窄的沸点,并且该级分,然后在第一列中进行萃取蒸馏,其中,e 在芳族化合物的主要含有链烷烃塔顶产物耗尽获得并在得到的芳族化合物富集的塔底产物被送入第二个塔,通过降低压力或增加富含芳烃的提余液的温度,使得所得到的作为底部产物提取 在这个过程中溶剂的组合可以归因于。