-
公开(公告)号：US06197916B1
公开(公告)日：2001-03-06
申请号：US09385680
申请日：1999-08-30
IPC分类号： C08G5962
摘要： A method for preparing bisphenol A is disclosed, with a selectivity for the p,p′-isomer of greater than about 97%. The method involves reacting phenol with p-isopropenylphenol or 2-(4-hydroxyphenyl)-2-propanol in the presence of a catalyst, at a reaction temperature of no greater than about 65° C. The bisphenol A product is preferably purified by a technique which omits the use of adduct crystallization.
摘要翻译： 公开了制备双酚A的方法，对p，p'-异构体的选择性大于约97％。 该方法包括在不大于约65℃的反应温度下，在催化剂存在下使苯酚与对异丙烯基苯酚或2-（4-羟基苯基）-2-丙醇反应。双酚A产物优选通过 省略使用加合物结晶的技术。
-
32.发明授权
公开(公告)号：US5908952A
公开(公告)日：1999-06-01
申请号：US823784
申请日：1997-03-24
CPC分类号： C07C68/005
摘要： Hydroxyaromatic compounds such as phenol are converted to diaryl carbonates by reaction with oxygen and carbon monoxide in the presence of a catalyst package which comprises a Group VIIIB metal, preferably palladium, salt of at least one aliphatic .beta.-diketone such as 2,4-pentanedione. The catalyst package also preferably comprises an inorganic cocatalyst, an organic cocatalyst and a bromide or chloride, preferably bromide, source such as a hexaalkylguanidinium bromide. The use of the .beta.-diketone salt confers such advantages as long shelf life under normal storage conditions, high activity upon recycle and capability of carbonylation at relatively low temperatures.
摘要翻译： 羟基芳族化合物如苯酚通过与氧和一氧化碳反应在催化剂包的存在下转化为碳酸二芳基酯，催化剂包含ⅦB族金属，优选至少一种脂族β-二酮的钯盐，例如2,4-戊二酮 。 催化剂包装还优选包含无机助催化剂，有机助催化剂和溴化物或氯化物，优选溴化物源，例如六烷基溴化胍。 使用β-二酮盐具有在正常储存条件下长保存期限，循环时高活性和在较低温度下羰基化能力的优点。
-
公开(公告)号：US20100218681A1
公开(公告)日：2010-09-02
申请号：US12394630
申请日：2009-02-27
CPC分类号： C08L63/00 , B01D53/228 , B01D67/0011 , B01D69/10 , B01D71/82 , B01D2325/027 , C08G59/5006 , C08G59/52 , C08K5/1515 , C08K5/17 , C08K5/175 , C08K5/3415 , C08L29/04 , C08L39/00 , C08L39/02 , C08L79/02 , Y02C10/10 , C08L2666/04 , C08L2666/20 , C08L2666/02 , C08L2666/22
摘要： In one aspect, the present invention provides a curable composition useful in the preparation of a gas separation membrane. The curable composition comprises a polyvinyl alcohol; an aliphatic polyamine; a polyglycidyl ether; and a salt of a C3-C5 amino cycloaliphatic acid. In another aspect the present invention provides a composition comprising a crosslinked polyvinyl alcohol comprising structural units derived from a polyglycidyl ether, a polyamine and the salt of a C3 to C5 amino cycloaliphatic acid. The compositions are useful in the preparation of gas separation membranes in which the C3 to C5 amino cycloaliphatic acid in the form of its salt functions as a mobile carrier of carbon dioxide.
摘要翻译： 一方面，本发明提供了可用于制备气体分离膜的可固化组合物。 可固化组合物包含聚乙烯醇; 脂肪族多胺 聚缩水甘油醚; 和C 3 -C 5氨基脂环族酸的盐。 另一方面，本发明提供一种包含交联聚乙烯醇的组合物，其包含衍生自多缩水甘油醚，多胺和C3至C5氨基环脂肪酸的盐的结构单元。 该组合物可用于制备气体分离膜，其中其盐形式的C 3至C 5氨基环脂族酸用作二氧化碳的可移动载体。
-
34.发明授权Method for preparing diaryl carbonates employing hexaalkylguanidinium halides 失效使用六烷基囟鎓卤化物制备碳酸二芳基酯的方法
公开(公告)号：US5898079A
公开(公告)日：1999-04-27
申请号：US929000
申请日：1997-09-12
IPC分类号： C07C68/00
CPC分类号： C07C68/005
摘要： Hydroxyaromatic compounds such as phenol are converted to diaryl carbonates by reaction with oxygen and carbon monoxide in the presence of a catalyst package which typically comprises a group VIIIB metal or compound thereof, an inorganic cocatalyst, an organic cocatalyst and a hexaalkylguanidinium bromide or chloride, preferably bromide. The use of the hexaalkylguanidinium salt causes an increase in the yield of diaryl carbonate without a decrease in selectivity.
摘要翻译： 在通常包含第VIIIB族金属或其化合物，无机助催化剂，有机助催化剂和六烷基溴化胍或氯化物的催化剂包的存在下，通过与氧和一氧化碳反应，将羟基芳族化合物如苯酚转化为碳酸二芳基酯 溴化物。 六烷基胍盐的使用导致碳酸二芳基酯的收率增加，而不会降低选择性。
-
公开(公告)号：US5760272A
公开(公告)日：1998-06-02
申请号：US823785
申请日：1997-03-24
CPC分类号： C07C68/005
摘要： Hydroxyaromatic compounds such as phenol are converted to diaryl carbonates by reaction with oxygen and carbon monoxide in the presence of a catalyst package and an added diluent free from active hydrogen. The preferred catalyst packages comprise a Group VIIIB metal or salt thereof, an inorganic cocatalyst, and organic cocatalysts and a bromide or chloride source. The amount of added diluent is an effective amount to improve selectivity to diaryl carbonate. Preferred diluents are diphenyl carbonate and N-methylpyrrolidone.
摘要翻译： 在催化剂封装和不含活性氢的添加稀释剂的存在下，通过与氧气和一氧化碳反应，将羟基芳族化合物如苯酚转化为碳酸二芳基酯。 优选的催化剂组合物包含VIIIB族金属或其盐，无机助催化剂和有机助催化剂以及溴化物或氯化物源。 添加的稀释剂的量是改善对碳酸二芳基酯的选择性的有效量。 优选的稀释剂是碳酸二苯酯和N-甲基吡咯烷酮。
-
公开(公告)号：US5756801A
公开(公告)日：1998-05-26
申请号：US797068
申请日：1997-02-10
CPC分类号： C07C68/08
摘要： Adducts of hydroxyaromatic compounds such as phenol and diaryl carbonates such as diphenyl carbonate are washed with a washing composition comprising a major proportion, typically about 90%, of the hydroxyaromatic compound and a minor proportion, typically about 10%, of the diaryl carbonate.
摘要翻译： 羟基芳族化合物如苯酚和碳酸二芳基酯如碳酸二苯酯的加合物用包含主要比例（通常约90％）的羟基芳族化合物和较小比例，通常约10％的碳酸二芳基酯的洗涤组合物洗涤。 ！
-
公开(公告)号：US5723689A
公开(公告)日：1998-03-03
申请号：US587052
申请日：1996-01-16
IPC分类号： B01J31/02 , B01J31/10 , C07B61/00 , C07C37/20 , C07C37/68 , C07C37/74 , C07C37/84 , C07C39/16 , C07C39/12
CPC分类号： C07C37/74 , C07C37/685 , C07C37/84
摘要： A method for recovering substantially pure p,p-bisarylols from a mixture comprising the same by subjecting the mixture to vacuum distillation and melt crystallization in the absence of an adduct crystallization and the generation of a reaction recycle stream.
摘要翻译： 一种通过在不存在加合物结晶并产生反应循环物流的情况下使混合物进行真空蒸馏和熔融结晶从而从包含其的混合物的混合物中回收基本上纯的p，p-双杂环的方法。
-
公开(公告)号：US06207848B1
公开(公告)日：2001-03-27
申请号：US09215388
申请日：1998-12-18
申请人： Eric James Pressman
发明人： Eric James Pressman
IPC分类号： C07C6800
CPC分类号： C07C68/005 , C07C69/96
摘要： The method of the present invention comprises reaction of a gaseous mixture of oxygen and carbon monoxide with an aromatic hydroxy compound in the presence of a catalyst under controlled pressure, wherein the partial pressure of oxygen is optimized to effect increased yields at reduced overall pressure.
摘要翻译： 本发明的方法包括氧气和一氧化碳的气体混合物与芳族羟基化合物在催化剂存在下在受控压力下的反应，其中氧气的分压被优化以在降低的总压力下实现增加的产率。
-
公开(公告)号：US5990362A
公开(公告)日：1999-11-23
申请号：US144487
申请日：1998-08-31
CPC分类号： C07C37/14 , C07C37/16 , C07C37/20 , C08G64/24 , C08G64/307
摘要： A method for preparing bisphenol A is disclosed, with a selectivity for the p,p'-isomer of greater than about 97%. The method involves reacting phenol with p-isopropenylphenol or 2-(4-hydroxyphenyl)-2-propanol in the presence of a catalyst, at a reaction temperature of no greater than about 65.degree. C. The bisphenol A product is preferably purified by a technique which omits the use of adduct crystallization.
摘要翻译： 公开了制备双酚A的方法，对p，p'-异构体的选择性大于约97％。 该方法包括在不大于约65℃的反应温度下，在催化剂存在下使苯酚与对异丙烯基苯酚或2-（4-羟基苯基）-2-丙醇反应。双酚A产物优选通过 省略使用加合物结晶的技术。
-
公开(公告)号：US07863463B2
公开(公告)日：2011-01-04
申请号：US11286190
申请日：2005-11-22
申请人： Eric James Pressman , Albert Santo Stella , Beatriz Peñalver Bernabe , Lioba Maria Kloppenburg , Lee Harris Bergman
发明人： Eric James Pressman , Albert Santo Stella , Beatriz Peñalver Bernabe , Lioba Maria Kloppenburg , Lee Harris Bergman
IPC分类号： C07D307/77
CPC分类号： C07D307/89
摘要： Disclosed herein is a method for purification of dianhydrides comprising a substantial amount (10000 ppm or more) of at least one metal salt. In one aspect the method is useful for the purification of dianhydrides prepared by the reaction of a halophthalic anhydride with a metal carbonate and may be optionally catalyzed by a phase transfer catalyst. The purification of the dianhydrides may be accomplished by hydrolyzing the dianhydride metal salt mixture directly to a tetraacid with an inorganic acid, followed by separating the impurities from an aqueous phase, and subsequently heating the tetraacid to effect ring closure to form a purified dianhydride having less than 50 parts per million metal halide and lower levels of other residual impurities. In one aspect the method is highly effective in removing phase transfer catalyst impurities such as hexalkylguanidinium halides initially present in the dianhydride undergoing purification.
摘要翻译： 本文公开了包含大量（10000ppm或更多）至少一种金属盐的二酸酐的纯化方法。 在一个方面，该方法可用于纯化通过卤代邻苯二甲酸酐与金属碳酸盐的反应制备的二酐，并且可任选地通过相转移催化剂催化。 二酸酐的纯化可以通过用无机酸将二酐金属盐混合物直接水解成四元酸，然后从水相中分离出杂质，随后加热四酸以实现闭环以形成具有较少量的纯化二酐 超过50ppm的金属卤化物和较低水平的其他残留杂质。 在一个方面，该方法在除去最初存在于经过纯化的二酐中的相转移催化剂杂质如六烷基卤化镓中是非常有效的。
-
-
-
-
-
-
-
-
-
搜索结果
49 条记录 (耗时 0.033 秒)
