Process for separating 2, 7-dimethylnaphthalene under pressure
    2.
    发明授权
    Process for separating 2, 7-dimethylnaphthalene under pressure 失效
    在压力下分离2,7-二甲基苯酚的方法

    公开(公告)号:US5220098A

    公开(公告)日:1993-06-15

    申请号:US756792

    申请日:1991-09-09

    IPC分类号: C07C7/14 C07C15/24

    CPC分类号: C07C7/14

    摘要: The present invention relates to a process for separating 2,7-DMN, characterized in that a mixture containing at least 50% by weight of 2,7-DMN and the other DMN isomers obtained by preliminarily concentrating a fraction in the range of 250.degree.-270.degree. C. of catalytically cracked petroleum oil is preliminarily adjusted to a temperature of 60.degree.-90.degree. C. to form a slurry containing the crystal of 2,7-DMN, which is placed in a tightly sealed pressure vessel, adiabatically pressurized to the range of 500-2,500 kgf/cm.sup.2 and solidified to form a state of co-existing of solid and liquid phases, liquid is then discharged under pressure from the solid-liquid co-existing system, the solid remaining in the vessel is pressed to discharge the liquid remaining between the solid particles, which are integrated to give 2,7-DMN having a purity of 98% by weight or more.

    Method of liquefying brown coal
    3.
    发明授权
    Method of liquefying brown coal 失效
    液化褐煤的方法

    公开(公告)号:US4565622A

    公开(公告)日:1986-01-21

    申请号:US550122

    申请日:1983-11-09

    IPC分类号: C10G1/06 C10G1/00 C10G1/08

    CPC分类号: C10G1/002 C10G1/083

    摘要: A method for the liquefaction of brown coal which comprises effecting primary hydrogenation at a temperature and pressure sufficient to promote the efficient hydrogenation of a slurry prepared by adding an iron-based catalyst and a slurrying solvent to brown coal; distilling all or a portion of the primary hydrogenation product, whereby a naphtha fraction, a middle distillate oil fraction, a heavy distillate oil fraction and a distillation residue are produced; recycling a portion of said middle distillate oil, said heavy distillate oil fraction and said distillation residue to said primary hydrogenation step as the slurrying solvent; removing ash from the remaining portion of the distillation residue, thereby separating the same into an insoluble fraction containing ash, insoluble organic matter or a mixture thereof, and a soluble fraction as a solution in said solvent; and feeding said soluble fraction and said middle and heavy distillate fractions, to a fixed-bed column reactor packed with a molybdenum-based catalyst for secondary hydrogenation at a temperature and pressure sufficient to promote the efficient hydrogenation thereof; and separating the naphtha fraction from the secondary hydrogenation product and recycling all or a portion of the remainder to said primary hydrogenation step as the slurrying solvent therefor.

    摘要翻译: 一种用于液化褐煤的方法,其包括在足以促进通过向褐煤中加入铁基催化剂和浆化溶剂制备的浆料的有效氢化的温度和压力下进行初级氢化; 蒸馏全部或一部分初级氢化产物,由此制备石脑油馏分,中间馏分油馏分,重馏分油馏分和蒸馏残余物; 将所述中间馏分油,所述重馏分油馏分和所述蒸馏残余物的一部分循环到所述初级氢化步骤作为浆化溶剂; 从蒸馏残余物的剩余部分除去灰分,从而将其分离成含有灰分,不溶性有机物或其混合物的不溶性级分,以及作为所述溶剂中的溶液的可溶性级分; 并将所述可溶部分和所述中重馏分部分加入到填充有钼基催化剂的固定床反应器中,以在足以促进其有效氢化的温度和压力下进行二次氢化; 并将所述石脑油馏分与二次氢化产物分离,并将其余部分的全部或一部分循环到所述初级氢化步骤作为其制浆溶剂。

    Luer needle unit and injector
    4.
    发明授权
    Luer needle unit and injector 失效
    Luer针单元和注射器

    公开(公告)号:US5611785A

    公开(公告)日:1997-03-18

    申请号:US576162

    申请日:1995-12-21

    摘要: A luer needle unit and an injector effectively prevent a user's fingers from being hurt when a disposable needle is separated from the luer needle after use, while realizing simple and positive attachment of the luer needle to a supporting cap. Guide protrusions and guide recesses are provided between the luer needle and the supporting cap to prevent the rotation thereof. Guiding projecting portions are formed in the supporting cap to guide a needle part of the luer needle in the axial direction.

    摘要翻译: 当使用后一次性针与鲁尔针分离时,鲁尔针单元和注射器有效地防止使用者的手指受伤,同时实现鲁尔针到支撑帽的简单且正确的附接。 引导突起和引导凹部设置在鲁尔针和支撑帽之间以防止其旋转。 引导突出部分形成在支撑帽中以沿轴向引导鲁尔针的针部分。