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82 条记录 (耗时 0.037 秒)

    Catalyst and process for aromatic hydrocarbons production from methane
    34.
    发明授权
    Catalyst and process for aromatic hydrocarbons production from methane 有权
    从甲烷生产芳烃的催化剂和工艺

    公开(公告)号：US06552243B2

    公开(公告)日：2003-04-22

    申请号：US09916469

    申请日：2001-07-27

    申请人： Joe D. Allison ,  Stephan Basso ,  Marc LeDoux ,  Cuong Pham-Huu ,  Harold A. Wright

    发明人： Joe D. Allison ,  Stephan Basso ,  Marc LeDoux ,  Cuong Pham-Huu ,  Harold A. Wright

    IPC分类号： C07C208

    CPC分类号： B01J37/18 ,  B01J29/48 ,  B01J31/0272 ,  B01J37/0238 ,  B01J2229/40 ,  C07C2/76 ,  C07C2529/40 ,  C07C2529/48 ,  Y10S585/906 ,  Y10S585/943 ,  C07C15/00

    摘要： A molybdenum-loaded crystalline aluminosilicate molecular sieve that exhibits the MFI crystal structure and has a silica-to-alumina ratio of about 50:1 is useful for aromatizing a hydrocarbon feed stream. The crystalline aluminosilicate preferably has an external surface acidity selectively passivated by means of an amorphous silica layer. A process for the aromatization of methane comprises a one- or multi-step process that contacts a feed stream comprising at least methane with a catalyst composition comprising the preferred molecular sieve, at hydrocarbon conversion conditions that include a temperature of 600-800° C., a pressure of less than 5 atmospheres absolute and a Weight Hourly Space Velocity (WHSV) of 0.1-10 h−1, with the external surface acidity of the crystalline aluminosilicate preferably selectively passivated by an amorphous silica layer. C6-plus aromatic hydrocarbons are preferably recovered from the process by means of an intermediate separation step.

    摘要翻译： 显示MFI晶体结构并具有约50:1的二氧化硅与氧化铝的钼负载结晶硅铝酸盐分子筛可用于使烃进料流芳构化。 结晶硅铝酸盐优选具有通过无定形二氧化硅层选择性钝化的外表面酸度。 用于甲烷芳构化的方法包括在包括600-800℃的烃转化条件下接触包含至少甲烷的进料流与包含优选分子筛的催化剂组合物的一步法或多步法。 ，绝对值小于5个大气压的压力和0.1-10h-1的重量每小时空速（WHSV），结晶硅铝酸盐的外表面酸度优选地被无定形二氧化硅层选择性钝化。 优选通过中间分离步骤从该方法回收C6加芳族烃。

    Process for producing styrenic polymer beads of preferred bead size
    35.
    发明授权
    Process for producing styrenic polymer beads of preferred bead size 失效
    制备优选珠粒尺寸的苯乙烯聚合物珠粒的方法

    公开(公告)号：US4333969A

    公开(公告)日：1982-06-08

    申请号：US219453

    申请日：1980-12-23

    申请人： Harold A. Wright ,  Alvin R. Ingram

    发明人： Harold A. Wright ,  Alvin R. Ingram

    IPC分类号： C08F2/00 ,  C08F2/22 ,  C08F2/30 ,  C08F2/44 ,  C08F12/00 ,  C08F12/08 ,  C08F257/02 ,  B05D7/00 ,  C08F112/08

    CPC分类号： C08F257/02

    摘要： Styrenic polymer beads of a preferred size are produced from styrenic polymer beads of a smaller size by forming an aqueous suspension of the styrenic polymer beads and adding thereto, under polymerization conditions, an aqueous emulsion formed by admixing styrenic monomer and a catalyst therefor with water containing a nonionic surfactant that is an ethylene oxide condensate of an alkylphenol, which contains at least fifty moles of ethylene oxide per mole of alkylphenol. The beads of preferred size are formed without formation of fine styrenic polymer particles and without significant amounts of clusters of beads.

    摘要翻译： 优选尺寸的苯乙烯类聚合物珠粒通过形成苯乙烯类聚合物珠粒的水性悬浮液形成较小尺寸的苯乙烯类聚合物珠粒，并在聚合条件下向其中加入通过将苯乙烯类单体和其催化剂与含有 作为烷基酚的环氧乙烷缩合物的非离子表面活性剂，每摩尔烷基酚含有至少50摩尔环氧乙烷。 形成优选尺寸的珠粒，而不形成细小的苯乙烯聚合物颗粒，而没有显着量的珠簇。

    Bead size distribution in the suspension polymerization of vinyl aromatic monomers in the presence of glutamic acid
    36.
    发明授权
    Bead size distribution in the suspension polymerization of vinyl aromatic monomers in the presence of glutamic acid 失效
    在谷氨酸存在下乙烯基芳族单体的悬浮聚合中的珠尺寸分布

    公开(公告)号：US4170699A

    公开(公告)日：1979-10-09

    申请号：US920610

    申请日：1978-06-29

    申请人： Harold A. Wright

    发明人： Harold A. Wright

    IPC分类号： C08F12/04 ,  C08F12/06 ,  C08F12/08 ,  C08F14/02

    CPC分类号： C08F12/04

    摘要： The production of polymer beads by a suspension polymerization process in which a vinyl aromatic monomer having a free-radical generating catalyst dissolved therein is suspended in an aqueous medium with the aid of from 0.1 to 2.0 percent by weight, based on monomer, of a finely divided phosphate suspending agent in the presence of a modifier and heated to cause the monomer to polymerize into polymer beads is improved by the addition to the suspension of at least about 0.01 percent by weight based on monomer of an adjunct modifier, glutamic acid. Although the process of the invention is especially applicable in the preparation of large polymer beads, the glutamic acid also makes it possible to prepare the smaller polymer beads having narrow particle size distribution, also.

    摘要翻译： 通过悬浮聚合方法制备聚合物珠粒，其中将溶解有自由基产生催化剂的乙烯基芳族单体悬浮在水性介质中，以0.1至2.0重量％的单体为基础， 在改性剂存在下加热分离的磷酸酯悬浮剂，并通过加入至少约0.01重量％的基于辅助改性剂单体谷氨酸的悬浮液来加热单体聚合成聚合物珠。 尽管本发明的方法特别适用于制备大的聚合物珠粒，但是也可以制备具有窄的粒度分布的较小的聚合物珠粒。