• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1. A process for the separation of paraffinic and olefinic C4 hydrocarbons by extractive distillation using morpholine as the selective solvent, the olefins together with the solvent being taken off from the bottom of the extractive distillation column and being separated from the solvent in a downstream stripping column, characterized in that the extractive distillation is carried out without an addition of water to the solvent and the vapours arising at the top of the stripping column on stripping of the solvent are condensed by normal water cooling or air cooling without the use of a compressor and without the use of a refrigerant circulation.
    公开号:SU1493097A3
    申请号:SU864027769
    申请日:1986-07-07
    公开日:1989-07-07
    发明作者:Пройсер Герхард；Шульце Мартин；Эммрих Герт
    申请人:Крупп-Копперс, Гмбх (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the petrochemical industry to a method for separating paraffinic and olefinic hydrocarbons by extractive distillation using morpholine as a selective solvent.
    The purpose of the invention is to simplify the process and increase the selectivity of the process, which is achieved by using anhydrous morpholine as a selective solvent.
    The drawing shows the technological scheme of the method.
    Example 1-4. The initial mixture of hydrocarbons C to be separated is introduced in the liquid state through conduit 1 into the middle part of the extractive distillation column 2, equipped with plates or other embedded parts. Through pipe 3, anhydrous morpholine is introduced into the upper part of the extractive distillation of column 2, flowing down the embedded parts of this column downwardly, absorbing olefins. Paraffins go through line 4 at the top of the column and can be condensed in condensation devices (not shown). The liquid product leaving the bottom of the column and consisting of anhydrous morpholine and olefins dissolved in it is withdrawn via conduit 5 from the extraction-distillation column 2 and is fed to a distillation column 6, in which
    QO
    with

    C / 1
    Phiiy by distillation separated from the anhydrous morphone. Anhydrous morpholes) 1 are removed through conduit 7 from the bottom of the column and, after appropriate cooling, achieved in an economical heat exchanger inside the unit, are returned via conduit 3 again to the extractive distillation column 2, while the olefinol vapor is removed from the distant column 6 has its upper part and is fed through pipeline 8 for their further processing: Since, with the passage of Omenia, in anhydrous morpholine they can accumulate, with pollution P1, in the area of the pipeline 7
    preconditions; t.ro (H branching 9, at which, with the appropriate position of valve 10, a partial amount of morpholine can be supplied to regenerating device 11. The regenerated motoline is again returned via conduit 12 to the circulation (pipeline 7), while the discharge diverted Tc from regenerating device 11 according to T1) to pipeline 13: Pipeline 14 for supplying fresh anhydrous g-yurfolin.
    In tab. Table 1 presents the conditions and results of the separation of the carbon minerals Sc according to the described scheme.
    T a b l and c a
    The amount of the initial mixture through the pipeline 1, kg / h
    Initial temperature, s The amount of solvent in the pipeline 3, kg / h
    The number of plates in the column 2 The composition of the hydrocarbons in the pipeline A, wt.%
    The amount of hydrocarbons in the pipeline A, kg / h Number of plates in the column 6 The temperature of the top of the column 6; ° С
    The temperature of the bottom of the column 6, with

    10 42
    10 35
    10 35

    2.7 joint-stock company
    36 176
    6.3
    40
    36 176
    dividing the cis / trans-butene-2 from the initial products (initial mixtures) containing, in addition to these products, n-butane in various co-concentrations. An example 3 implementation of the method relates to the joint production of butene-1 and cis / trans-butene-2 from the starting product containing, in addition to these substances, iso- and n-butane.
    Example 5. The method is carried out analogously to example 2, but morpholine containing 10% by weight of water is used as the selective solvent.
    The results of the process are presented
    Table 2. Table 2

    one
    n-Butane 49 Butene-2 51 Morpholine with a water content of 10 wt.%
    ten
    42
    165
    Continuation of table 1
    f
     The number of plates in the column 2 The composition of the hydrocarbons in the pipeline 4, wt.%
    0
    L
    The amount of hydrocarbons in the pipeline 4, kg / h
    5 The number of plates in the column 6 The composition of hydrocarbons in the pipeline 8, wt.%:
    0
    The amount of hydrocarbons in the pipeline 8, kg / h
    5 Vcod wt.% Paraffins olefins
    Purity, wt.%: Paraffins
    0 olefins
    The temperature of the head of the column 6, С The pressure in the head of the column 6, abs. bar The temperature of the sump column 6, ° C
    120
    n-butane 92.2 buten-2 3 morpholine 3 water 1.8
    5.2
    40
    n-butane 1 butene-2 97.5 morpholine 0.3 water 1.2
    5.1
    99 97
    92.2 97.5
    36
    3.20
    165
    The introduction of water into morpholine reduces the dissolving capacity of the selective solvent with respect to hydrocarbons, which results in the need to increase the amount of solvent compared to anhydrous morpholine from 135. to 165 kg / h. In addition, the use of morpholine containing water is accompanied by the formation of a triple azeotrope, morpholine with water and butene-2, which leads to contamination of the head product of the column with water and morpholine.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    A method of separating paraffinic and olefinic C4 hydrocarbons by
    four
    of extractive distillation using morpholine-based selective solvent in an extractive-distillation column to remove solvent and olefinic hydrocarbons from the lower part of this column, followed by separating the solvent from the olefinic hydrocarbons in the distant distillation column with the condensation of vapors formed in the upper part of this column by means of normal water or air cooling, characterized in that, in order to simplify the process technology and increase the separation selectivity, 33 as selective Anhydrous morpholine is used for the solvent.
    t
    /four
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    同族专利:
    公开号 | 公开日
    DE3532289A1|1987-03-19|
    ES556116A0|1987-07-16|
    ES8706590A1|1987-07-16|
    CN86104676A|1987-03-11|
    UA5984A1|1994-12-29|
    JPS6261934A|1987-03-18|
    DE3662184D1|1989-04-06|
    CN1011307B|1991-01-23|
    EP0216991B1|1989-03-01|
    EP0216991A1|1987-04-08|
    AT40982T|1989-03-15|
    JPH0729944B2|1995-04-05|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1908126C3|1969-02-19|1974-06-27|Heinrich Koppers Gmbh, 4300 Essen|Process for the separation of saturated hydrocarbons and olefins|
    DE1916255C3|1969-03-29|1979-04-05|Krupp-Koppers Gmbh, 4300 Essen|Process for the separation of hydrocarbon mixtures which contain paraffins, monoolefins, diolefins and possibly small amounts of highly unsaturated hydrocarbons|
    IT972269B|1972-11-29|1974-05-20|Snam Progetti|PROCEDURE FOR THE RECOVERY OF SATURATED HYDROCARBONS AT HIGH PU REZZES FROM MIXTURES THAT COUNT THEM|
    IT1151182B|1982-05-20|1986-12-17|Anic Spa|INTEGRATED PROCEDURE FOR THE PRODUCTION OF ALCHIL TER-BUTYL ETHERS AND BUTENE-1|DE3823772A1|1988-07-14|1990-02-08|Krupp Koppers Gmbh|METHOD FOR SEPARATING PARAFFINIC AND OLEFINIC C4HYDROCARBONS|
    FR2673178B1|1991-02-26|1994-02-11|Institut Francais Petrole|PROCESS FOR SEPARATING BUTANES AND BUTENES BY EXTRACTIVE DISTILLATION.|
    JP2842091B2|1992-09-11|1998-12-24|日本ゼオン株式会社|Method for obtaining high-purity 1-butene and 2-butene|
    DE19849651C2|1998-10-29|2003-01-16|Krupp Uhde Gmbh|Rectifying column for the extractive distillation of closely or azeotropically boiling mixtures|
    DE10242923A1|2002-09-16|2004-03-18|Oxeno Olefinchemie Gmbh|Separation of butenes and butanes by extractive distillation with a polar extractant comprises extractive distillation of a butene and butane containing stream with a polar extractant with recycle of the polar extractant|
    EP2016985A1|2007-07-16|2009-01-21|Total Petrochemicals Research Feluy|Process for optimizing the separation of a hydrocarbon-containing feed stream.|
    CN102850170B|2011-06-29|2015-12-16|中国石油化工股份有限公司|A kind of carbon five separation mixed solvent based on ionic liquid|
    PL2917169T3|2012-11-07|2019-11-29|Lummus Technology Inc|Selective olefin extraction|
    US10011778B2|2013-12-17|2018-07-03|Uop Llc|Process and apparatus for improving propylene yield from a fluid catalytic cracking process|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19853532289|DE3532289A1|1985-09-11|1985-09-11|METHOD FOR SEPARATING PARAFFINIC AND OLEFINIC C4HYDROCARBONS|
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