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23 条记录 (耗时 0.022 秒)

    Green catalytic process for the synthesis of acetyl salicylic acid
    1.
    发明授权
    Green catalytic process for the synthesis of acetyl salicylic acid 有权
    用于合成乙酰水杨酸的绿色催化方法

    公开(公告)号：US07544831B2

    公开(公告)日：2009-06-09

    申请号：US11859001

    申请日：2007-09-21

    申请人： Raksh Vir Jasra ,  Beena Tyagi ,  Manish Kumar Mishra

    发明人： Raksh Vir Jasra ,  Beena Tyagi ,  Manish Kumar Mishra

    IPC分类号： C07C67/02 ,  C07C69/02 ,  C07C63/04

    CPC分类号： C07C67/08 ,  C07C69/157

    摘要： The present invention provides a green catalytic process for the synthesis of acetyl salicylic acid using solid acid catalysts at atmospheric pressure. The invention involve the solid acid catalyst such as sulfated transition metal oxides namely nano-crystalline sulfated zirconia, sulfated titania; modified zeolites namely zeolite H-beta, H-Y, H-ZSM-5 and K-10 montmorillonite clay in a solvent free environment using salicylic acid and acetic anhydride with yield about 95% and high selectivity (100%). The solid acid catalysts can be recovered, regenerated and reused.

    摘要翻译： 本发明提供了在大气压下使用固体酸催化剂合成乙酰基水杨酸的绿色催化方法。 本发明涉及固体酸催化剂，例如硫酸化过渡金属氧化物，即纳米结晶硫酸氧化锆，硫酸化二氧化钛; 改性沸石，即沸石H-β，H-Y，H-ZSM-5和K-10蒙脱土粘土，在无溶剂环境中使用水杨酸和乙酸酐，产率约95％，高选择性（100％）。 固体酸催化剂可以回收，再生和再利用。

    Catalytic process for the preparation of isolongifolene
    2.
    发明授权
    Catalytic process for the preparation of isolongifolene 有权
    用于制备异龙脑油的催化方法

    公开(公告)号：US07132582B2

    公开(公告)日：2006-11-07

    申请号：US10448457

    申请日：2003-05-30

    申请人： Raksh Vir Jasra ,  Beena Tyagi ,  Manish Kumar Mishra

    发明人： Raksh Vir Jasra ,  Beena Tyagi ,  Manish Kumar Mishra

    IPC分类号： C07C5/23 ,  B01J20/34 ,  C01G25/02

    CPC分类号： B01J21/066 ,  B01J37/036 ,  B01J37/20 ,  C07C5/31 ,  C07C2521/06 ,  C07C13/28

    摘要： The present invention relates to a catalytic process for preparation of isolongifolene using nanocrystalline solid super acid. This process is an eco-friendly, single step, solvent free catalytic process for the preparation of a tricyclic sesqui-terpene hydrocarbon, isolongifolene. More particularly, the present invention provides a process for the catalytic isomerisation of longifolene to iso-longifolene using nano-crystalline sulfated zirconia as a solid super acid catalyst.

    摘要翻译： 本发明涉及使用纳米结晶固体超强酸制备异龙蕊烯的催化方法。 该方法是一种环保，单步，无溶剂的催化方法，用于制备三环倍半萜烃，异环戊烯。 更具体地说，本发明提供了使用纳米结晶硫酸化氧化锆作为固体超酸催化剂将长叶烯催化异构化为异龙蒿烯的方法。

    Catalysed acylation of alkylated benzene derivatives
    3.
    发明授权
    Catalysed acylation of alkylated benzene derivatives 有权
    烷基化苯衍生物的催化酰化

    公开(公告)号：US07087791B2

    公开(公告)日：2006-08-08

    申请号：US10678902

    申请日：2003-10-02

    申请人： Raksh Vir Jasra ,  Beena Tyagi ,  Yogiraj Mansukhlal Badheka

    发明人： Raksh Vir Jasra ,  Beena Tyagi ,  Yogiraj Mansukhlal Badheka

    IPC分类号： C07C45/00

    CPC分类号： C07C45/46 ,  B01J21/16 ,  B01J29/085 ,  B01J29/18 ,  B01J29/7057 ,  B01J29/90 ,  Y02P20/584 ,  C07C49/76

    摘要： An ecofriendly process for acylation of an alkylated benzene derivative has increased selectively towards para position and comprises a step of reacting the alkylated benzene derivative with an acylating agent in the presence of nitrobenzene, dichlorobenze, dimethylsulfolane, and/or benzotrile, and a crystalline alumino silicate catalyst having general formula M2/nO.Al2O3.xSiO2.wH2O, wherein M is an alkali cation, a rare earth cation, and/or a proton, wherein the Si/Al ratio is in the range of 5.5 to 20, wherein the step of reacting is performed at temperature between 80° to 140° C. for 5 to 25 hours. In a further step, the solid catalyst is separated from the reaction mixture of step, and in yet another step, the acylated alkyl benzene derivative is separated from the mixture.

    摘要翻译： 烷基化苯衍生物酰化的环保方法选择性地向对位增加，并且包括在硝基苯，二氯苯，二甲基环丁砜和/或苯并吡喃存在下使烷基化苯衍生物与酰化剂反应的步骤，以及结晶铝硅酸盐 具有通式M 2 / n O的催化剂。Al 2 O 3·xSiO 2·w < 2 O，其中M是碱性阳离子，稀土阳离子和/或质子，其中Si / Al比在5.5至20的范围内，其中反应步骤在 80°至140℃，持续5至25小时。 在另一步骤中，将固体催化剂与步骤的反应混合物分离，在另一步骤中，将酰化烷基苯衍生物与混合物分离。

    Process for the preparation of a molecular sieve adsorbent for the adsorptive dehydration of alcohols
    4.
    发明授权
    Process for the preparation of a molecular sieve adsorbent for the adsorptive dehydration of alcohols 有权
    用于制备用于醇的吸附脱水的分子筛吸附剂的方法

    公开(公告)号：US07407906B2

    公开(公告)日：2008-08-05

    申请号：US11297523

    申请日：2005-12-08

    申请人： Raksh Vir Jasra ,  Jince Sebastian ,  Chintansinh Dharmendrasinh Chudasama

    发明人： Raksh Vir Jasra ,  Jince Sebastian ,  Chintansinh Dharmendrasinh Chudasama

    IPC分类号： B01J20/18 ,  B01J29/06

    CPC分类号： B01J20/186

    摘要： This invention relates to the use of pore mouth control of microporous solids for developing novel molecular sieve adsorbents and their potential in the drying of alcohols. More specifically, the invention relates to the manufacture and use of a molecular sieve adsorbent, which selectively adsorbs water from azeotropic alcohol-water mixtures by pore mouth control of microporous solids with liquid phase metal alkoxide deposition on the external surface at ambient conditions of temperature and pressure. The prepared adsorbent is therefore useful for the commercial drying of alcohols.

    摘要翻译： 本发明涉及微孔固体的孔口控制用于开发新的分子筛吸附剂及其在醇的干燥中的潜力。 更具体地，本发明涉及分子筛吸附剂的制造和使用，其通过在环境温度条件下在外表面上的液相金属醇盐沉积孔微孔固体的孔口控制来选择性地吸附共沸醇 - 水混合物中的水，以及 压力。 因此，制备的吸附剂可用于醇的商业干燥。

    Catalytic epoxidation of styrene with molecular oxygen using metal ion exchanged zeolites
    6.
    发明申请
    Catalytic epoxidation of styrene with molecular oxygen using metal ion exchanged zeolites 有权
    使用金属离子交换的沸石用分子氧催化苯乙烯的环氧化

    公开(公告)号：US20070149791A1

    公开(公告)日：2007-06-28

    申请号：US11375697

    申请日：2006-03-14

    申请人： Raksh Vir Jasra ,  Jince Sebastian

    发明人： Raksh Vir Jasra ,  Jince Sebastian

    IPC分类号： C07D301/06

    CPC分类号： B01J29/072 ,  B01J29/143 ,  C07D301/06

    摘要： This invention provides a catalytic epoxidation of styrene to styrene oxide with molecular oxygen using cobalt containing zeolite. Catalytic epoxidation of styrene-to-styrene epoxide was carried out using molecular oxygen in presence of Co2+ exchanged zeolites. Molecular oxygen from air is also useful for the epoxidation reaction at atmospheric pressure. The presence of adsorbed water molecules in the catalyst also increases the styrene conversion without affecting the styrene oxide selectivity. Various alkali and alkaline earth cationic promoters were introduced into the zeolite catalyst to increase the styrene oxide selectivity. The present invention explore the effect of adsorbed water molecules and alkali and alkaline earth metal cationic promoters in the cobalt exchanged zeolite catalyst, on the styrene conversion and styrene oxide selectivity for the catalytic epoxidation of styrene to styrene oxide with molecular oxygen.

    摘要翻译： 本发明提供使用含钴沸石的苯乙烯与分子氧的氧化苯乙烯的催化环氧化。 苯乙烯 - 苯乙烯环氧化物的催化环氧化是在分子氧存在下进行的。 来自空气的分子氧也可用于在大气压下的环氧化反应。 催化剂中吸附水分子的存在也增加了苯乙烯转化率，而不影响氧化苯乙烯的选择性。 将各种碱金属和碱土金属阳离子促进剂引入到沸石催化剂中以增加氧化苯乙烯的选择性。 本发明探讨了吸附水分子和碱金属和碱土金属阳离子助催化剂在钴交换沸石催化剂中对苯乙烯转化率和苯乙烯氧化物选择性对苯乙烯与分子氧催化氧化苯乙烯氧化物的影响。

    Process for the preparation of a molecular sieve adsorbent for the size/shape selective separation of air
    9.
    发明授权
    Process for the preparation of a molecular sieve adsorbent for the size/shape selective separation of air 有权
    制备分子筛吸附剂的方法，用于选择性分离空气的尺寸/形状

    公开(公告)号：US06878657B2

    公开(公告)日：2005-04-12

    申请号：US10403475

    申请日：2003-03-31

    申请人： Raksh Vir Jasra ,  Chintansinh Dharmendrasinh Chudasama ,  Jince Sebastian

    发明人： Raksh Vir Jasra ,  Chintansinh Dharmendrasinh Chudasama ,  Jince Sebastian

    IPC分类号： B01D53/02 ,  B01J20/18 ,  C01B39/02 ,  B01J29/70

    CPC分类号： B01J20/28097 ,  B01D53/02 ,  B01J20/186

    摘要： This invention relates to the use of pore mouth control of zeolite NaA for developing a novel molecular sieve adsorbents and their potential in the separation and purification of gaseous mixtures by the size/shape selective adsorption. More specifically,the invention relates to the manufacture and use of a molecular sieve adsorbent, which is selective towards oxygen from its gaseous mixture with nitrogen and argon by pore mouth control of zeolite NaA with liquid phase alkoxide deposition on the external surface at ambient conditions of temperature and pressure. Thus prepared adsorbent is useful for the separation and purification of nitrogen and argon from its mixture with oxygen.

    摘要翻译： 本发明涉及沸石NaA用于开发新型分子筛吸附剂的孔口控制及其通过尺寸/形状选择性吸附分离和纯化气态混合物的潜力的用途。 更具体地说，本发明涉及分子筛吸附剂的制造和使用，该分子筛吸附剂通过在氮气和氩气的气体混合物中对氧气进行选择性，通过在室温条件下的外部表面上的沸点NaA与液相醇盐沉积 温度和压力。 如此制备的吸附剂可用于从其与氧气的混合物中分离和纯化氮气和氩气。