公开(公告)号：US4786418A

公开(公告)日：1988-11-22

申请号：US167185

申请日：1988-03-11

申请人： Desh R. Garg ,  Carl J. Kjellson ,  Brent M. Lok ,  Craig H. Barkhausen

发明人： Desh R. Garg ,  Carl J. Kjellson ,  Brent M. Lok ,  Craig H. Barkhausen

IPC分类号： B01J20/34 ,  C02F1/28

CPC分类号： C02F1/281 ,  B01J20/3408

摘要： In the process for removing organic impurity constituents from aqueous media by adsorbing same on an organophilic molecular sieve adsorbent, followed by regeneration of the adsorbent by contact with an oxidant, such as hydrogen peroxide, whereby the organic adsorbate is converted to innocuous materials, principally CO.sub.2 and H.sub.2 O, the efficiency of the regeneration operation is found to be substantially improved by decreasing the pH of the regenerating medium and/or increasing the number of Bronsted acid sites in the molecular sieve adsorbent.

摘要翻译： 在通过在有机分子筛吸附剂上吸附有机杂质成分从水介质中除去有机杂质成分的过程中，然后通过与氧化剂如过氧化氢接触再生吸附剂，由此将有机物质转化为无害物质，主要是二氧化碳 通过降低再生介质的pH和/或增加分子筛吸附剂中的布朗斯台德酸位数，发现再生操作的效率显着提高。

公开(公告)号：US4373935A

公开(公告)日：1983-02-15

申请号：US259377

申请日：1981-05-01

申请人： Joseph P. Ausikaitis ,  Desh R. Garg

发明人： Joseph P. Ausikaitis ,  Desh R. Garg

IPC分类号： B01D53/04 ,  B01D53/26 ,  C07C29/76 ,  C07C31/08 ,  C07C31/10 ,  C07C31/12 ,  C07C33/03

CPC分类号： C07C29/76 ,  B01D53/04 ,  B01D53/261 ,  C07C31/08 ,  C07C31/10 ,  C07C31/12 ,  C07C33/03 ,  B01D2253/108 ,  B01D2253/308 ,  B01D2257/704 ,  B01D2259/40086

摘要： An efficient fixed-bed vapor-phase adsorption cycle for bulk separations wherein the heat front generated by the exothermic heat of adsorption is maintained in the bed either in or behind the mass transfer zone, and is subsequently used in the desorption/regeneration step. The cycle is especially useful in drying mixtures of water and compounds which form azeotropes with water as well as the azeotropes themselves, such as 190-proof ethanol.

摘要翻译： 用于批量分离的有效的固定床气相吸附循环，其中由吸附放热产生的热前沿在质量传递区内或之后保持在床中，并随后用于解吸/再生步骤。 该循环特别适用于干燥与水形成共沸物的化合物的混合物以及共沸物本身，例如190-不含乙醇。

公开(公告)号：US4740631A

公开(公告)日：1988-04-26

申请号：US679213

申请日：1984-12-07

申请人： Moez M. Nagji ,  Desh R. Garg ,  William C. Miller

发明人： Moez M. Nagji ,  Desh R. Garg ,  William C. Miller

IPC分类号： C07C29/76 ,  C07C41/06 ,  C07C41/36 ,  C07C41/34

CPC分类号： C07C41/06 ,  C07C29/76 ,  C07C41/36

摘要： In the process for preparing methyl tert.-alkyl ether comprising the steps of (a) contacting and reacting in the liquid phase a reaction mixture formed by combining a stream consisting essentially of C.sub.4 -C.sub.5 hydrocarbons and containing at least some proportion of isoalkylene and a stoichiometric excess of methanol, with respect to the isoalkylene, to form a reaction product comprising methyl tert.-alkyl ether, unreacted methanol and unreacted C.sub.4 -C.sub.5 hydrocarbons; (b) isolating the methyl tert.-alkyl ether from the reaction product; and (c) recovering the unreacted methanol from the residual portion of the reaction product; the improvement which comprises selectively adsorbing the methanol constituent of said residual reaction product in a bed of crystalline molecular sieve adsorbent and recovering same by desorption using as a purge-desorption stream, the C.sub.4 -C.sub.5 hydrocarbon stream used to prepare the initial reaction mixture.

摘要翻译： 在制备甲基叔烷基醚的方法中，包括以下步骤：（a）在液相中接触和反应通过组合基本上由C4-C5烃组成并且含有至少一定比例的异亚烷基和 化学计量过量的甲醇，相对于异亚烷基，形成包含甲基叔烷基醚，未反应的甲醇和未反应的C 4 -C 5烃的反应产物; （b）从反应产物中分离甲基叔烷基醚; 和（c）从反应产物的残留部分回收未反应的甲醇; 该改进包括在结晶分子筛吸附剂床中选择性吸附所述残留反应产物的甲醇成分，并通过用作吹扫 - 脱附流的解吸法回收其，所述C4-C5烃流用于制备初始反应混合物。

公开(公告)号：US4775396A

公开(公告)日：1988-10-04

申请号：US117688

申请日：1987-11-05

申请人： Henry Rastelli ,  Chien C. Chao ,  Desh R. Garg

发明人： Henry Rastelli ,  Chien C. Chao ,  Desh R. Garg

IPC分类号： B01D53/02 ,  B01D53/04 ,  B01J20/18 ,  C01B3/56 ,  C01B21/04 ,  C01B32/50

CPC分类号： B01D53/047 ,  C01B21/0466 ,  C01B3/56 ,  C01B31/20 ,  B01D2253/108 ,  B01D2253/1085 ,  B01D2253/30 ,  B01D2257/504 ,  C01B2210/0051 ,  Y02C10/08 ,  Y02E50/346 ,  Y02P20/152 ,  Y10S95/902

摘要： Carbon dioxide is selectively adsorbed and separated from non-acidic gases such as nitrogen, hydrogen and methane using a pressure swing adsorption process in a fixed adsorption bed containing a faujasite type of zeolitic aluminosilicate containing at least 20 equivalent percent of at least one cation species selected from the group consisting of zinc, rare earth, hydrogen and ammonium and containing not more than 80 equivalent percent of alkali metal or alkaline earth metal cations.

公开(公告)号：US4663052A

公开(公告)日：1987-05-05

申请号：US808173

申请日：1985-12-12

申请人： John D. Sherman ,  Moez M. Nagji ,  Ronald J. Ross ,  Joseph P. Ausikaitis ,  Desh R. Garg

发明人： John D. Sherman ,  Moez M. Nagji ,  Ronald J. Ross ,  Joseph P. Ausikaitis ,  Desh R. Garg

IPC分类号： B01D15/04 ,  B01D53/28 ,  B01J20/18 ,  B01D53/02

CPC分类号： B01J20/186

摘要： A process for the removal of water and other polar compounds from an acidic stream containing water and at least one acid compound comprising contacting the acidic stream with an adsorbent comprising a chabazite-type zeolite wherein said adsorbent has a M.sub.2 O/Al.sub.2 O.sub.3 mole oxide ratio of at least 0.5 where "M" is at least one cation selected from the group consisting of potassium, rubidium and cesium.

摘要翻译： 一种从含有水和至少一种酸化合物的酸性流中除去水和其它极性化合物的方法，包括使酸性流与包含菱沸石型沸石的吸附剂接触，其中所述吸附剂具有M 2 O / Al 2 O 3摩尔氧化物比为 至少0.5，其中“M”是选自钾，铷和铯中的至少一种阳离子。

公开(公告)号：US4648977A

公开(公告)日：1987-03-10

申请号：US814897

申请日：1985-12-30

申请人： Desh R. Garg ,  James S. Ritscher

发明人： Desh R. Garg ,  James S. Ritscher

IPC分类号： C02F1/28

CPC分类号： C02F1/281

摘要： Toxic or otherwise contaminating organic impurity constituents in aqueous media such as waste water streams from industrial processes or potable water supplies are removed and converted to harmless oxidation products by contacting such media with an organophilic molecular sieve whereby the organic species are concentrated as adsorbates, and thereafter contacting the adsorbate-loaded molecular sieve with an aqueous solution of a compound which has a standard oxidation potential of at least 0.25 volt in an amount and for a sufficient time to convert the organic materials to non-toxic products such as CO.sub.2.

摘要翻译： 通过将这些介质与有机分子筛接触，将有机物质浓缩为有机物质，然后将这些介质与工业过程或饮用水源等废水中的有机杂质成分污染，从而将其转化为无害的氧化产物， 使被吸附物负载的分子筛与具有至少0.25伏的标准氧化电位的化合物的水溶液的量和足够的时间使有机材料转化为无毒产物如CO 2。