公开(公告)号：US5107045A

公开(公告)日：1992-04-21

申请号：US660435

申请日：1991-02-22

申请人： Mark W. Meszaros ,  Ibrahim Ghanayem

发明人： Mark W. Meszaros ,  Ibrahim Ghanayem

IPC分类号： C07C17/12

CPC分类号： C07C17/12

摘要： A regioselective process is provided for preparing 4-bromo-o-xylene in an isomer mixture of 4-bromo-o-xylene and 3-bromo-o-xylene by combining a molar excess of bromine with o-xylene. The produced 3-bromo-o-xylene isomer preferentially reacts with the excess bromine to produce dibromo-o-xylenes. The weight ratio of the 4-bromo-o-xylene to the 3-bromo-o-xylene in the product isomer mixture can be as high as about 97:3. Concurrent production of alpha-bromo-o-xylene is avoided by conducting the admixing in either darkness or in sulfur dioxide solution. The dibromo-o-xylene by products are easily separated by subsequent vacuum distillation or similar expedients.

摘要翻译： 提供了一种区域选择性方法，通过将摩尔过量的溴与邻二甲苯组合，在4-溴 - 邻 - 二甲苯和3-溴 - 邻二甲苯的异构体混合物中制备4-溴 - 邻二甲苯。 所产生的3-溴 - 邻 - 二甲苯异构体优先与过量的溴反应以产生二溴 - 邻二甲苯。 产物异构体混合物中4-溴 - 邻二甲苯与3-溴 - 邻 - 二甲苯的重量比可以高达约97:3。 通过在黑暗或二氧化硫溶液中混合来避免同时生产α-溴代邻二甲苯。 通过产物的二溴邻二甲苯容易通过随后的真空蒸馏或类似的方法分离。

公开(公告)号：US5210353A

公开(公告)日：1993-05-11

申请号：US620529

申请日：1990-11-30

申请人： Carl A. Udovich ,  E. William Breder, Jr. ,  Ibrahim Ghanayem ,  Mark W. Meszaros ,  Thomas E. Nemo ,  Thomas G. Smith

发明人： Carl A. Udovich ,  E. William Breder, Jr. ,  Ibrahim Ghanayem ,  Mark W. Meszaros ,  Thomas E. Nemo ,  Thomas G. Smith

IPC分类号： C07C6/12

CPC分类号： C07C6/126

摘要： A process is provided for transaralkylating a class of starting compounds comprised of aryl-substituted lower alkanes and aryl-substituted fused alkylene ring compounds to produce derivatives of such compounds wherein benzyl substituents thereof have different alkyl substituents compared to the starting compounds. The process is carried out by admixing such a starting compound with a lower alkyl-substituted aromatic compound under liquid phase conditions in the presence of a catalytically effective amount of a Friedel-Crafts catalyst. The process makes possible new and economical routes for synthesizing desired lower alkyl-substituted benzyl group containing compounds, such as 2,2-di(lower alkyl-substituted) phenyl propanes and 1,3,3-trimethyl-1-(lower alkyl-substituted)-phenyl indans. Thus, there is provided a three-step process for making dixylylpropane from alpha methyl styrene and also a two-step process for making 1,3,3,6-tetramethyl-1-o-xylyl indan from alpha-4-dimethyl styrene. Provided also is a process for preparing 3,3',4,4'-dixylylmethane from a mixture of isomeric dixylylmethanes.

摘要翻译： 提供了一种方法，用于将由芳基取代的低级烷烃和芳基取代的稠合亚烷基环化合物组成的一类起始化合物转烷基化以产生这样的化合物的衍生物，其中苄基取代基与起始化合物相比具有不同的烷基取代基。 该方法通过在液相条件下在催化有效量的Friedel-Crafts催化剂的存在下将这种起始化合物与低级烷基取代的芳族化合物混合来进行。 该方法可用于合成所需的低级烷基取代苄基化合物如2,2-二（低级烷基取代的）苯基丙烷和1,3,3-三甲基-1-（低级烷基取代的苄基） 取代的） - 苯基茚二酮。 因此，提供了由α-甲基苯乙烯制备二甲苯基丙烷的三步法，以及由α-4-二甲基苯乙烯制备1,3,3,6-四甲基-1-邻苯二甲酰基茚二酮的两步法。 还提供了从异构二烷基甲烷的混合物制备3,3'，4,4'-二甲苯基甲烷的方法。

公开(公告)号：US4677240A

公开(公告)日：1987-06-30

申请号：US817817

申请日：1986-01-10

申请人： Ronald E. Carlson ,  Stephen R. Ely ,  Allen I. Feinstein ,  Ibrahim Ghanayem

发明人： Ronald E. Carlson ,  Stephen R. Ely ,  Allen I. Feinstein ,  Ibrahim Ghanayem

IPC分类号： B01J29/00 ,  B01J29/86 ,  C07B61/00 ,  C07C1/00 ,  C07C4/06 ,  C07C7/148 ,  C07C15/02 ,  C07C67/00 ,  C10G35/06 ,  C10G47/02 ,  C07C4/12 ,  C07C5/22

CPC分类号： C10G35/065 ,  C07C4/06 ,  C07C7/148 ,  C07C2529/86

摘要： A catalytic process is provided for upgrading a hydrocarbon feed stream containing pseudocumene together with a fraction of close boiling hydrocarbon compounds having a normal boiling point in a temperature range of about 320.degree. F. to about 365.degree. F. comprising contacting such hydrocarbon feed steam in the presence of hydrogen with a catalyst comprising AMS-1B crystalline borosilicate molecular sieve whereby such close boiling hydrocarbon compounds are converted to compounds having a normal boiling point below a temperature of about 300.degree. F., and fractionating the effluent product stream.

摘要翻译： 提供了一种催化方法，用于将含有假枯烯的烃进料流与一般沸点在约320°F至约365°F范围内的沸点高的沸点烃化合物进行升级， 氢气与含有AMS-1B结晶硼硅酸盐分子筛的催化剂的存在，由此将这种接近沸腾的烃化合物转化为正常沸点低于约300°F的化合物，并分馏出流出物产物流。

公开(公告)号：US4007218A

公开(公告)日：1977-02-08

申请号：US600858

申请日：1975-07-31

申请人： Ibrahim Ghanayem ,  Alvin E. Trevillyan

发明人： Ibrahim Ghanayem ,  Alvin E. Trevillyan

IPC分类号： C07C69/44 ,  C07C69/50 ,  C07C69/76 ,  C07C69/80

CPC分类号： C07C69/44

摘要： Process of producing relatively pure esters, which comprises reacting a solution of organic acid compound in excess monohydroxy compound in the presence of a tetraalkyl titanate esterification catalyst to produce a monohydroxy solution of organic ester, treating the dissolved organic ester in the substantial absence of water at a temperature of at least 120.degree. C. with solid alkaline earth metal oxide or hydroxide adding at least two mols of water per mol of alkaline earth metal at up to 100.degree. C. and partitioning solid alkaline earth metal compound from the dissolved organic ester.

摘要翻译： 制备相对纯的酯的方法，其包括在四烷基钛酸酯酯化催化剂的存在下使有机酸化合物的溶液在过量的一羟基化合物的存在下反应以产生有机酯的单羟基溶液，基本上不存在水处理溶解的有机酯 至少120℃的温度与固体碱土金属氧化物或氢氧化物在高达100℃下每摩尔碱土金属加入至少两摩尔水，并从溶解的有机酯中分配固体碱土金属化合物。