Pipeline paraffin scraper
    21.
    发明授权
    Pipeline paraffin scraper 失效
    管道石蜡刮刀

    公开(公告)号:US3900912A

    公开(公告)日:1975-08-26

    申请号:US37904473

    申请日:1973-07-13

    Applicant: TEXACO AG

    CPC classification number: B08B9/0553 F16L2101/12

    Abstract: A paraffin scraper for pipelines. It is the type commonly called a pig, which is driven through the pipeline by fluid pressure in the pipeline. It has a solid plastic cylindrical shape with a number of annular recesses. In addition, there is a smalldiameter axial bore extending through the whole length of the body to create a jet-fluid stream at the front during scraping action.

    Abstract translation: 用于管道的石蜡刮板。 它是通常称为猪的类型,其通过管道中的流体压力被驱动通过管道。 它具有固定的塑料圆柱形形状,具有许多环形凹槽。 另外,在刮削动作期间,存在延伸穿过主体整个长度的小直径轴向孔,以在前部产生喷射流体流。

    Process for the production of higher alkylacrylates and methacrylates
    22.
    发明授权
    Process for the production of higher alkylacrylates and methacrylates 失效
    制备高级烷基丙烯酸酯和甲基丙烯酸酯的方法

    公开(公告)号:US3887609A

    公开(公告)日:1975-06-03

    申请号:US45658474

    申请日:1974-04-01

    Applicant: TEXACO AG

    CPC classification number: C07C67/03 C07C67/62 C07C69/54

    Abstract: A process for the production of higher alkyl acrylates and methacrylates having reduced color numbers and containing minimum quantities of polymerization inhibitors and other impurities, wherein the alkyl chains contain 3 or more carbons, by the transesterification of methyl acrylate or methacrylate with alkanols of 3 or more carbons in the presence of a titanium alcoholate as transesterification catalyst and also in the presence of polymerization inhibitor combination and entraining agent for removing the methyl alcohol by-product. The transesterification is carried out by passing an oxygencontaining gas through the reaction mixture. In recovering the higher alkylacrylates or methacrylates the resultant reaction mixture is subjected to a steam distillation.

    Abstract translation: 通过丙烯酸甲酯或甲基丙烯酸甲酯与3个或更多个链烷醇的酯交换,生产具有降低的颜色数量并含有最少量的聚合抑制剂和其它杂质的高级烷基丙烯酸酯和甲基丙烯酸酯的方法,其中烷基链含有3个或更多个碳 在作为酯交换催化剂的钛醇化物的存在下,还存在用于除去甲醇副产物的聚合抑制剂组合和夹带剂的存在下。 通过使含氧气体通过反应混合物进行酯交换。 在回收较高级烷基丙烯酸酯或甲基丙烯酸烷基酯时,将所得反应混合物进行蒸汽蒸馏。

    Processs for the production of normal paraffins by urea dewaxing of mineral oil distillates
    23.
    发明授权
    Processs for the production of normal paraffins by urea dewaxing of mineral oil distillates 失效
    通过矿物油分离法生产正常参比物的方法

    公开(公告)号:US3847791A

    公开(公告)日:1974-11-12

    申请号:US35428473

    申请日:1973-04-25

    Applicant: TEXACO AG

    Inventor: KUNERT M SANDHACK L

    CPC classification number: C10G73/24 C07C7/152 C07C9/00

    Abstract: In a urea dewaxing process, a powdery adduct, capable of being effectively separated by centrifuging, is formed at a temperature range of from about 20* to 40* C. if particular oil solvent mixtures are employed. Useful solvent mixtures are a C5-C6 hydrocarbon such as isopentane, hexane or benzene plus a higher boiling organic compound such as methylisobutylketone.

    Abstract translation: 在尿素脱蜡方法中,如果使用特定的油溶剂混合物,则在约20℃至40℃的温度范围内形成能够通过离心有效分离的粉状加合物。 有用的溶剂混合物是C5-C6烃如异戊烷,己烷或苯加上沸点高的有机化合物如甲基异丁基酮。

    Turbulent flow high-molecular liquid viscosimeter
    26.
    发明授权
    Turbulent flow high-molecular liquid viscosimeter 失效
    涡流高分子液体粘度计

    公开(公告)号:US3751974A

    公开(公告)日:1973-08-14

    申请号:US3751974D

    申请日:1971-10-07

    Applicant: TEXACO AG

    Inventor: URBAS W

    CPC classification number: G01N11/16

    Abstract: A device for continuously measuring the viscosity of highmolecular liquids in turbulent flow comprises a vibrating reed on a viscosimeter mounted in a tube opening into an agitating cylindrical vessel with the free end of the vibrating reed pointing upstream and positioned a distance from the flowing liquid equal to three times the diameter of the tube. The face of the reed is substantially parallel to a plane including a typical arcuate line of flow at the opening, and the tube containing the reed is mounted with its longitudinal axis at an angle between 5* and 15* below a plane of a typical arcuate line of flow at the tube opening. The tube longitudinal axis of one embodiment is mounted at an angle of between 25* and 35* outwardly from a plane tangent to the lines of flow at the tube opening and a modification has the vibrating reed mounted in two tubes and spaced from the opening a distance of three tube diameters. Both embodiments prevent gas cushion build up around the vibrating reed and the attendant inaccurate measurement in a reaction producing higher molecular materials under azeotrope-forming conditions.

    Method for preventing coke obstructions in pyrolysis plants
    30.
    发明授权
    Method for preventing coke obstructions in pyrolysis plants 失效
    防止热解厂焦化障碍的方法

    公开(公告)号:US3880621A

    公开(公告)日:1975-04-29

    申请号:US36904873

    申请日:1973-06-11

    Applicant: TEXACO AG

    CPC classification number: B01J19/0026 C10G9/16 F28F19/00

    Abstract: A method for the prevention of coke obstruction in a pyrolysis plant, for example in the cracking of ethane in the manufacture of ethylene, wherein cracked gases from a pyrolysis furnace at a temperature of 750* to 850*C. are passed to a cooler, and a screen is disposed in the inlet portion of the cooler at an easily accessible portion whereby the on stream time of the pyrolysis system is extended.

    Abstract translation: 一种用于防止热解装置中的焦炭阻塞的方法,例如在乙烯制造中的乙烷裂化中,其中来自在750℃至850℃的热解炉中的裂化气体通过冷却器, 并且在易于接近的部分处将冷却器的入口部分设置在屏幕上,从而延长了热解系统的输送时间。

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