Process for preparing olefin sulfonates
    2.
    发明授权
    Process for preparing olefin sulfonates 失效
    制备烯烃磺酸盐的方法

    公开(公告)号:US4059620A

    公开(公告)日:1977-11-22

    申请号:US361264

    申请日:1973-05-17

    CPC classification number: C07C309/00

    Abstract: An improved process for preparing olefin sulfonic acids and sulfonates by the reaction of sulfur trioxide and an olefin mixture having 14 to 16 carbon atoms per molecule which includes at least 30 percent by weight dimer olefins is disclosed. The olefin mixture and sulfur trioxide are mixed and reacted in a reaction zone of a continuous falling film reactor apparatus having a segregated cooling jacket, wherein the upper 1/8 to 1/3 of the reaction zone is operated and maintained at a constant temperature of between about 0.degree. to below about 27.degree. C and the lower 7/8 to 2/3 of the reaction zone is operated and maintained at a higher constant temperature of between about 25.degree. to about 40.degree. C. The acidic reactor effluent is then aged prior to neutralization. The improved process produces a resulting product having a low oil content and low color at increased production rates while greatly reducing the off gas plume for improved air pollution abatement.

    Abstract translation: 公开了通过三氧化硫与每分子具有14至16个碳原子的烯烃混合物反应制备烯烃磺酸和磺酸盐的改进方法,其包括至少30重量%的二聚烯烃。 将烯烃混合物和三氧化硫混合并在具有偏析冷却套的连续降膜反应器装置的反应区中反应,其中反应区的1/8至1/3的上部运行并保持在 在约0℃至低于约27℃之间和反应区的下部7/8至2/3操作并保持在约25℃至约40℃的更高的恒定温度。然后将酸性反应器流出物 在中和之前老化。 改进的方法产生的产品具有低的油含量和低颜色的增加的生产速率,同时大大减少废气羽流改善空气污染减排。

    Skateboard brake
    6.
    发明授权
    Skateboard brake 失效
    滑板刹车

    公开(公告)号:US4099734A

    公开(公告)日:1978-07-11

    申请号:US797125

    申请日:1977-05-16

    Applicant: Fred Lowery

    Inventor: Fred Lowery

    CPC classification number: A63C17/1436 A63C17/01 A63C2017/1463

    Abstract: A skateboard brake includes a heavy brush disposed below the skateboard and secured to a support bracket which is pivotally joined to a lower forward portion of the skateboard. The support bracket extends behind the rear wheels of the skateboard, and a plunger extends vertically from the support bracket through a slot in the rear end of the skateboard. The support bracket is resiliently biased upwardly to maintain the brush out of engagement with the pavement. A pedal is provided on the upper rear portion of the skateboard superjacent to the plunger, so that the skateboard rider may step on the brake, pedal and thereby force the plunger downwardly, the support bracket pivoting on the forward pivot and urging the brush into frictional engagement with the pavement.

    Abstract translation: 滑板制动器包括设置在滑板下方的重刷,并且固定到支撑托架,支撑托架枢转地连接到滑板的下部前部。 支撑托架延伸在滑板的后轮之后,柱塞从支撑托架通过滑板后端的槽垂直延伸。 支撑托架向上弹性偏置以保持刷子与路面不接合。 踏板设置在与柱塞相邻的滑板的上后部,使得滑板骑行者可以踩踏制动器,踏板,从而将柱塞向下推动,支撑支架在前枢轴上枢转并且将刷子推动到摩擦 与路面接合。

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