Method for extending catalyst life in processes for preparing vinyl aromatic hydrocarbons
    132.
    发明授权
    Method for extending catalyst life in processes for preparing vinyl aromatic hydrocarbons 有权
    在制备乙烯基芳烃的方法中延长催化剂寿命的方法

    公开(公告)号:US06936743B2

    公开(公告)日:2005-08-30

    申请号:US10235279

    申请日:2002-09-05

    Inventor: James R. Butler

    CPC classification number: C07C5/3332 B01J23/78 C07C2523/745 C07C15/46

    Abstract: Disclosed is a method for extending the life of dehydrogenation catalysts used to prepare vinyl aromatic hydrocarbons. The catalysts, which typically include both iron oxide and potassium containing catalysis promoter, are exposed to additional potassium delivered using a potassium carboxylate. The potassium carboxylates are desirably free of halogens and other catalysts poisons or groups that could result in the undesirable properties in vinyl aromatic hydrocarbons produced therewith. The present invention is particularly useful with the production of styrene and methyl styrene.

    Abstract translation: 公开了延长用于制备乙烯基芳烃的脱氢催化剂的寿命的方法。 通常包括氧化铁和含有催化剂催化剂的催化剂暴露于使用羧酸钾递送的另外的钾。 羧酸钾不需要卤素和其它催化剂毒物或基团,这些毒素或基团可能导致在其中产生的乙烯基芳烃中的不良性质。 本发明特别适用于生产苯乙烯和甲基苯乙烯。

    Dehydrogenation process
    133.
    发明授权
    Dehydrogenation process 失效
    脱氢工艺

    公开(公告)号:US06781024B2

    公开(公告)日:2004-08-24

    申请号:US10074173

    申请日:2002-02-12

    Abstract: Process for the catalytic dehydrogenation of a C2 or C3 alkyl aromatic in which a feedstock containing the alkyl aromatic and steam is supplied into the inlet of a tubular reactor containing a dehydrogenation catalyst. Within the reactor, the feedstock flows through at least a portion of the reactor along a spiral flow path extending longitudinally of the reactor. The resulting vinyl aromatic product is then recovered from a downstream or outlet section of the reactor. The spiral flow path through which the feedstock is passed is located at least adjacent the inlet side of the reactor and at least a portion of the spiral flow path contains a particulate dehydrogenation catalyst. The spiral flow path may extend throughout a major portion of the elongated tubular reactor and may contain a particulate dehydrogenation catalyst in a substantial portion there. The feedstock containing the alkyl aromatic and steam is supplied into a plurality of tubular reactors located within the interior of a dehydrogenation reactor vessel and is arranged in a parallel relationship in which the tubular reactors are spaced laterally from one another and from the interior wall of the reaction vessel.

    Abstract translation: 将含有烷基芳族和蒸汽的原料供给到含有脱氢催化剂的管式反应器的入口中的C2或C3烷基芳族化合物的催化脱氢方法。 在反应器内,原料沿着反应器纵向延伸的螺旋流动路径流过反应器的至少一部分。 然后从反应器的下游或出口部分回收得到的乙烯基芳族化合物。 原料通过的螺旋流动路径至少位于反应器的入口侧,螺旋流路的至少一部分含有颗粒脱氢催化剂。 螺旋流动路径可以延伸穿过细长管式反应器的主要部分,并且可以在其中大部分含有颗粒状脱氢催化剂。 将含有烷基芳族化合物和蒸汽的原料供给到位于脱氢反应器容器内部的多个管式反应器中并且以平行关系排列,其中管式反应器彼此横向间隔开, 反应容器

    Method for preparation of stable bitumen polymer compositions
    134.
    发明授权
    Method for preparation of stable bitumen polymer compositions 失效
    稳定沥青聚合物组合物的制备方法

    公开(公告)号:US06767939B2

    公开(公告)日:2004-07-27

    申请号:US10140317

    申请日:2002-05-07

    Abstract: The present invention provides a method for preparing an asphalt and thermoplastic elastomer composition. The process comprises heating an asphalt cut in a stirred tank to a temperature sufficient to allow the stirring of the asphalt in the tank. A thermoplastic elastomer or rubber is added to the asphalt while continuing to stir the asphalt. The mixture is stirred at a speed and for a period of time sufficient to increase the distribution of the elastomer into the asphalt. The stirring speed is reduced and the temperature is increased to add crosslinking agents to the tank. Stirring is continued for a period of time sufficient to improve the distribution of the crosslinking agent dispersion in the asphalt. Crosslinking agents include compositions of mercaptobenzothiazole, zinc oxide and elemental sulfur; compositions of mercaptobenzothiazole, zinc oxide, and mixed polythiomorpholine; and compositions of zinc 2-mercaptobenzothiazole and dithiodimorpholine.

    Abstract translation: 本发明提供一种制备沥青和热塑性弹性体组合物的方法。 该方法包括将在搅拌槽中切割的沥青加热到足以允许在罐中搅拌沥青的温度。 在沥青中继续搅拌沥青时,加入热塑性弹性体或橡胶。 将混合物以足以增加弹性体分配到沥青中的速度搅拌一段时间。 搅拌速度降低,温度升高,向罐中加入交联剂。 搅拌持续一段时间,足以改善沥青中交联剂分散体的分布。 交联剂包括巯基苯并噻唑,氧化锌和元素硫的组合物; 巯基苯并噻唑,氧化锌和混合多硫代吗啉的组成; 和2-巯基苯并噻唑锌和二硫代二吗啉的组合物。

    Conversion of aromatic hydrocarbons
    135.
    发明授权
    Conversion of aromatic hydrocarbons 失效
    芳烃转化

    公开(公告)号:US06706937B2

    公开(公告)日:2004-03-16

    申请号:US10167096

    申请日:2002-06-11

    CPC classification number: C07C6/123 C07C6/126 C07C2529/24

    Abstract: A process for the transalkylation of an aromatic feedstock containing a benzene component and a polyalkylated aromatic component comprising at least one polyalkyl aromatic compound of at least nine carbon atoms. The feedstock is supplied to a reaction zone containing a metal modified zeolite transalkylation catalyst. The reaction zone is operated under conditions providing an equivalent conversion of pure toluene in the presence of the catalyst within the range of 40-55%, resulting in a transalkylated product with a reduced polyalkyl benzene content and an enhance monoalkyl benzene content relative to the transalkylation feedstock. In continued operation of the transalkylation reaction zone, at least one of the reaction conditions of temperature, pressure, and space velocity is adjusted in order to maintain a constant reaction severity to provide a desired equivalent conversion of toluene within a tolerance range of ±2%. Specifically, the temperature is progressively increased while continuing the operation of the transalkylation zone to maintain a condition of constant reaction severity.

    Abstract translation: 包含苯组分和多烷基化芳族组分的芳族原料的烷基转移的方法,其包含至少一种具有至少9个碳原子的多烷基芳族化合物。 将原料供给到含有金属改性沸石烷基转移催化剂的反应区。 在催化剂存在下,在40-55%范围内提供纯甲苯当量转化的条件下操作反应区,得到相对于烷基转移反应的多烷基苯含量降低和烷基苯含量增加的烷基转移产物 原料。 在烷基转移反应区的继续操作中,调节温度,压力和空间速度的至少一个反应条件以保持恒定的反应强度,以在±2%的公差范围内提供所需的甲苯等效转化率, 。 具体地,温度逐渐增加,同时继续进行烷基转移区的操作,以保持反应持续的严重程度。

    Dehydrogenation process
    136.
    发明授权
    Dehydrogenation process 有权
    脱氢工艺

    公开(公告)号:US06380449B1

    公开(公告)日:2002-04-30

    申请号:US09718601

    申请日:2000-11-22

    Abstract: Process for the catalytic dehydrogenation of ethylbenzene in which a feedstock containing ethylbenzene and steam is supplied into the inlet of a tubular reactor containing a dehydrogehation catalyst. Within the reactor, the feedstock flows through at least a portion of the reactor along a spiral flow path extending longitudinally of the reactor. The resulting styrene product is then recovered from a downstream or outlet section of the reactor. The spiral flow path through which the feedstock is passed is located at least adjacent the inlet side of the reactor and at least a portion of the spiral flow path contains a particulate dehydrogenation catalyst. The spiral flow path may extend throughout a major portion of the elongated tubular reactor and may contain a particulate dehydrogenation catalyst in a substantial portion there.

    Abstract translation: 乙苯的催化脱氢方法,其中将含有乙苯和蒸汽的原料供入含有脱氢化催化剂的管式反应器的入口。 在反应器内,原料沿着反应器纵向延伸的螺旋流动路径流过反应器的至少一部分。 然后从反应器的下游或出口部分回收得到的苯乙烯产物。 原料通过的螺旋流动路径至少位于反应器的入口侧,螺旋流路的至少一部分包含颗粒脱氢催化剂。 螺旋流动路径可以延伸穿过细长管式反应器的主要部分,并且可以在其中大部分含有颗粒状脱氢催化剂。

    Method for preparation of stable bitumen polymer compositions
    138.
    发明授权
    Method for preparation of stable bitumen polymer compositions 有权
    稳定沥青聚合物组合物的制备方法

    公开(公告)号:US06180697B2

    公开(公告)日:2001-01-30

    申请号:US09389785

    申请日:1999-09-04

    CPC classification number: C08L95/00 C08L2666/04 C08L53/00

    Abstract: The present invention provides a method for preparing an asphalt and thermoplastic elastomer composition. The process comprises heating an asphalt cut in a stirred tank to a temperature sufficient to allow the stirring of the asphalt in the tank. A thermoplastic elastomer or rubber is added to the asphalt while continuing to stir the asphalt. The mixture is stirred at a speed and for a period of time sufficient to increase the distribution of the elastomer into the asphalt. The stirring speed is reduced and the temperature is increased to add an oil dispersion of crosslinking agents to the tank. Stirring is continued for a period of time sufficient to improve the distribution of the crosslinking agent dispersion in the asphalt.

    Abstract translation: 本发明提供一种制备沥青和热塑性弹性体组合物的方法。 该方法包括将在搅拌槽中切割的沥青加热到足以允许在罐中搅拌沥青的温度。 在沥青中继续搅拌沥青时,加入热塑性弹性体或橡胶。 将混合物以足以增加弹性体分配到沥青中的速度搅拌一段时间。 搅拌速度降低,温度升高,向罐中加入交联剂的油分散体。 搅拌持续一段时间,足以改善沥青中交联剂分散体的分布。

    Gas phase alkylation method and catalyst
    139.
    发明授权
    Gas phase alkylation method and catalyst 失效
    气相烷基化方法和催化剂

    公开(公告)号:US6090991A

    公开(公告)日:2000-07-18

    申请号:US259747

    申请日:1999-02-27

    Abstract: Ethylbenzene is produced by alkylation over monoclinic silicalite catalysts having a weak acid site concentration of less than 50 micromoles per gram. A feedstock containing benzene and ethylene is applied to an alkylation reaction zone having at least one catalyst bed containing a monoclinic silicalite catalyst having a weak acid site concentration of less than 50 micromoles per gram. 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 silicalite catalysts to produce an alkylation product. The alkylation product is then withdrawn from the reaction zone for separation and recovery.

    Abstract translation: 通过在弱酸性位点浓度小于50微摩尔/克的单斜硅沸石催化剂上烷基化生产乙苯。 将含有苯和乙烯的原料施加到具有至少一个含有弱酸性位点浓度小于50微摩尔/克的单斜晶硅沸石催化剂的催化剂床的烷基化反应区。 烷基化反应区在其中苯处于气相的温度和压力条件下运行,以在硅沸石催化剂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。

    Gas phase alkylation-liquid transalkylation process
    140.
    发明授权
    Gas phase alkylation-liquid transalkylation process 失效
    气相烷基化 - 液体烷基转移法

    公开(公告)号:US5955642A

    公开(公告)日:1999-09-21

    申请号:US739564

    申请日:1996-10-30

    CPC classification number: C07C15/02 C07C2529/40 C07C2529/70

    Abstract: An alkylation/transalkylation process involving vapor phase alkylation of a benzene feedstock in a multi-stage alkylation zone having a plurality of series connected catalyst beds containing a pentasil aromatic alkylation catalyst, such as silicalite, coupled with intermediate separation and recirculation steps and liquid phase transalkylation over a transalkylation catalyst comprising a molecular sieve having a pore size greater than the pore size of the silicalite. The benzene containing feedstock is supplied to the multi-stage alkylation reaction zone along with a C.sub.2 -C.sub.4 alkylating agent operated under temperature and pressure conditions to maintain the benzene in the gas phase. Alkylated product is recovered from the alkylation zone and supplied to a benzene recovery zone for the separation of the benzene from the alkylation product. Benzene from the benzene recovery zone is recycled to the reaction zone. A higher boiling bottom fraction containing a mixture of monoalkylated and polyalkylated aromatic components is supplied to a secondary separation zone from which a monoalkylated aromatic component, e.g. ethylbenzene, is recovered overhead with a heavier polyalkylated aromatic recovered as a bottom fraction. The bottom fraction may be applied to a tertiary separation zone.

    Abstract translation: 一种烷基化/烷基转移方法,涉及在多级烷基化区中苯原子气相烷基化的方法,该多级烷基化区具有多个串联连接的催化剂床,该催化剂床含有pentasil芳族烷基化催化剂,如硅沸石,加上中间分离和再循环步骤以及液相烷基转移 在包含具有大于硅沸石的孔径的孔径的分子筛的烷基转移催化剂上。 含苯原料与在温度和压力条件下运行的C2-C4烷基化剂一起供应到多级烷基化反应区,以保持苯在气相中。 从烷基化区回收烷基化产物,并将其供应至苯回收区,以将苯与烷基化产物分离。 苯从苯回收区循环到反应区。 将含有单烷基化和多烷基化芳族组分的混合物的较高沸点底部馏分供应到二级分离区,从其分离单烷基化芳族组分,例如, 乙苯,用作为底部馏分回收的较重的多烷基化芳烃塔顶回收。 底部馏分可以施加到第三分离区。

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