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    Removal of 2-ring aromatics from low boiling streams containing low concentrations of same using membranes
    1.
    发明授权
    Removal of 2-ring aromatics from low boiling streams containing low concentrations of same using membranes 失效
    使用膜从含有低浓度相同的低沸点流中除去2-环芳烃

    公开(公告)号：US5254795A

    公开(公告)日：1993-10-19

    申请号：US957118

    申请日：1992-10-07

    申请人： Heather A. Boucher ,  Donald T. MacGregor

    发明人： Heather A. Boucher ,  Donald T. MacGregor

    IPC分类号： C10G31/11 ,  C07C7/144 ,  B01D61/00

    CPC分类号： C10G31/11

    摘要： Straight run hydrocarbon distillate streams containing low concentrations of 2-ring aromatics can be processed to remove a high percentage of the 2-ring aromatics by contacting said stream with one side of a polyester imide membrane under pervaporation conditions to produce a permeate stream containing a very high percentage of 2-ring aromatics and a retentate stream of severely reduced 2-ring aromatic content.

    摘要翻译： 通过在渗透蒸发条件下使所述物流与聚酯酰亚胺膜的一侧接触以产生含有非常多的2-环芳族化合物的渗透物流，可以处理含有低浓度2-环芳族化合物的直馏烃馏出物物流以除去高百分比的2-环芳族化合物 高环率的2-环芳族化合物和严重降低的2-环芳烃含量的滞留物流。

    Process for separating alkylaromatics from aromatic solvents and the separation of the alkylaromatic isomers using membranes
    3.
    发明授权
    Process for separating alkylaromatics from aromatic solvents and the separation of the alkylaromatic isomers using membranes 失效
    从芳香族溶剂中分离烷基芳族化合物的方法和使用膜分离烷基芳族异构体的方法

    公开(公告)号：US4571444A

    公开(公告)日：1986-02-18

    申请号：US603028

    申请日：1984-04-27

    申请人： Laura E. Black ,  Heather A. Boucher

    发明人： Laura E. Black ,  Heather A. Boucher

    IPC分类号： C07C2/66 ,  B01D61/02 ,  B01D71/64 ,  C07C1/00 ,  C07C7/144 ,  C07C15/00 ,  C07C15/113 ,  C07C67/00

    CPC分类号： B01D61/025 ,  C07C7/144

    摘要： In the production of alkylaromatics by the alkylation of aromatic hydrocarbons with alkylating agents such as olefins typically in the presence of a catalyst, the unconverted aromatic hydrocarbon remaining after completion of the alkylation process is separated from the alkylaromatic product and the terminal alkylaromatic isomers are separated from the mixture of alkylaromatic isomers produced in the alkylation process by the selective permeation of the aromatic hydrocarbon and the terminal isomers through a permselective membrane, preferably an asymmetric membrane producing a permeate rich in the terminal isomers and a retentate which is lean (i.e., depleated) in the terminal isomers. Permeation is under reverse osmosis conditions, that is, under a pressure sufficient to at least overcome the osmotic pressure of the aromatic hydrocarbon present in the mixture made up of the aromatic hydrocarbon, the olefin and the mixed isomer alkylaromatic product. Permeation is carried out at a pressure of about 100 to 800 psig, preferably a pressure of about 200 to 600 psig, more preferably a pressure of about 300 to 500 psig, at a temperature of about 0.degree. to 100.degree. C., preferably about 20.degree.-80.degree. C., most preferably about 20.degree. to 50.degree. C. The membrane of choice is an asymmetric polyimide membrane.

    摘要翻译： 在通过芳族烃与烷基化剂如烯烃的烷基化（通常在催化剂存在下）进行烷基芳族化合物的生产中，将烷基化方法完成后残留的未转化的芳族烃与烷基芳族化合物分离，并将末端烷基芳族异构体与 在烷基化方法中通过选择性渗透芳族烃和末端异构体通过选择性选择性膜，优选不对称膜，产生富含末端异构体的渗透物和贫（即，耗尽）的滞留物在烷基化方法中产生的烷基芳族异构体的混合物， 在末端异构体中。 渗透处于反渗透条件下，即在足以至少克服由芳族烃，烯烃和混合异构体烷基芳族化合物产物组成的混合物中存在的芳族烃的渗透压的压力下。 渗透在约0℃至100℃的温度下进行，压力为约100至800psig，优选压力为约200至600psig，更优选压力为约300至500psig，优选约为 20℃-80℃，最优选约20℃至50℃。所选择的膜是不对称聚酰亚胺膜。