Gas phase alkylation with split load of catalyst
    42.
    发明授权
    Gas phase alkylation with split load of catalyst 失效
    气相烷基化,分体负载催化剂

    公开(公告)号:US6057485A

    公开(公告)日:2000-05-02

    申请号:US193310

    申请日:1998-11-17

    摘要: Ethylbenzene is produced by alkylation over a split load of monoclinic silicalite alkylation catalysts having different silica/alumina ratios. A feedstock containing benzene and ethylene is applied to a multi-stage alkylation reaction zone having a plurality of series-connected catalyst beds. At least one catalyst bed contains a first monoclinic silicalite catalyst having a silica/alumina ratio of at least 275. At least one other catalyst bed contains a second monoclinic silicalite catalyst having a silica/alumina ratio of less than about 275. The alkylation reaction zone is operated at temperature and pressure conditions in which the benzene is in a gaseous phase to cause gas-phase alkylation of the aromatic substrate in the presence of the monoclinic silicalite catalysts to produce an alkylation product. The alkylation product is then withdrawn from the reaction zone for separation and recovery. The use of the split load of catalyst allows a higher purity ethylbenzene product to be produced at improved efficiencies than if only one of the catalysts were used by itself.

    摘要翻译: 通过在具有不同二氧化硅/氧化铝比的单斜晶硅沸石烷基化催化剂的分裂负载下烷基化来制备乙苯。 将含有苯和乙烯的原料施加到具有多个串联催化剂床的多级烷基化反应区。 至少一个催化剂床含有二氧化硅/氧化铝比至少为275的第一单斜晶硅沸石催化剂。至少一个其它催化剂床含有二氧化硅/氧化铝比小于约275的第二单斜硅沸石催化剂。烷基化反应区 在其中苯处于气相的温度和压力条件下操作,以在单斜硅沸石催化剂的存在下引起芳族底物的气相烷基化以产生烷基化产物。 然后将烷基化产物从反应区取出以进行分离和回收。 与仅使用一种催化剂本身一起使用的催化剂的分离负载的使用允许以提高的效率生产更高纯度的乙苯产物。

    Removal of heparin from heparin-containing blood plasma samples using a
triethylaminoethyl cellulose tablet
    47.
    发明授权
    Removal of heparin from heparin-containing blood plasma samples using a triethylaminoethyl cellulose tablet 失效
    使用三乙基氨基乙基纤维素片从含肝素的血浆样品中除去肝素

    公开(公告)号:US4226599A

    公开(公告)日:1980-10-07

    申请号:US050355

    申请日:1979-06-20

    IPC分类号: G01N33/86 G01N31/00

    摘要: A tableted form of fibrous triethylaminoethyl cellulose suitable for the removal of heparin from heparin-containing blood plasma. The tablet is composed of granular microcrystalline cellulose and fibrous triethylaminoethyl cellulose in a ratio of from about 5.4:1 to about 10:1. The triethylaminoethyl cellulose tablet, which is formulated to provide from about 5 to about 26 mg. of triethylaminoethyl cellulose per milliliter of plasma sample, is added to a heparin-containing blood plasma sample, the sample is agitated or allowed to stand for a time sufficient to permit adsorption of substantially all heparin present. The sample is then centrifuged and the remaining heparin-free plasma can be subjected to coagulation testing in order to determine the true clotting time.

    摘要翻译: 纤维状三乙基氨基乙基纤维素的片状形式,适用于从含有肝素的血浆中除去肝素。 片剂由粒状微晶纤维素和纤维状三乙基氨基乙基纤维素组成,比例约为5.4:1至约10:1。 三乙氨基乙基纤维素片剂,其配制成提供约5至约26mg。 的三乙胺基乙基纤维素/毫升血浆样品加入含肝素的血浆样品中,将样品搅拌或静置足以允许存在基本上所有肝素的吸附。 然后将样品离心,然后将剩余的无肝素血浆进行凝血试验,以确定真实的凝血时间。

    Method for providing a co-feed in the coupling of toluene with a carbon source
    48.
    发明授权
    Method for providing a co-feed in the coupling of toluene with a carbon source 有权
    在甲苯与碳源的偶合中提供共进料的方法

    公开(公告)号:US08653314B2

    公开(公告)日:2014-02-18

    申请号:US13457503

    申请日:2012-04-27

    IPC分类号: C07C1/207 C07C1/20

    摘要: A process for making styrene is disclosed that includes reacting toluene with a C1 source and a co-feed in the presence of a catalyst in a reactor to form a first product stream comprising styrene, ethylbenzene, carbon monoxide, and hydrogen; separating the hydrogen and carbon monoxide from the first product stream to form a second stream; separating the hydrogen from the second stream to form a third stream comprising hydrogen and a fourth stream comprising carbon monoxide; wherein the fourth stream is recycled to the reactor and forms at least a portion of the co-feed.

    摘要翻译: 公开了一种制备苯乙烯的方法,其包括在反应器中在催化剂存在下使甲苯与C1源和共进料反应以形成包含苯乙烯,乙苯,一氧化碳和氢的第一产物流; 将氢和一氧化碳与第一产物流分离以形成第二流; 从第二流分离氢气以形成包含氢的第三料流和包含一氧化碳的第四料流; 其中第四料流被再循环到反应器中并形成共进料的至少一部分。