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公开(公告)号：US06359163B2
公开(公告)日：2002-03-19
申请号：US09877044
申请日：2001-06-11
IPC分类号： C07C6996
摘要： A process for producing a dialkyl carbonate which comprises performing reaction of allophanate represented by the following general formula (1) and an alkyl alcohol represented by the following general formula (2) as raw materials, thereby producing a dialkyl carbonate represented by the following general formula (3). RO—CO—NH—CO—NH2 (1) ROH (2) RO—CO—OR (3) wherein R is an alkyl group.
摘要翻译： 一种碳酸二烷基酯的制造方法，其特征在于，将由以下通式（1）表示的脲基甲酸酯和下述通式（2）表示的烷基醇反应为原料，由下述通式 （3）其中R为烷基。
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公开(公告)号：US6031122A
公开(公告)日：2000-02-29
申请号：US38623
申请日：1998-03-12
IPC分类号： C07C68/00
CPC分类号： C07C68/00
摘要： A process for producing a dialkyl carbonate which comprises reacting at least one member selected from the group consisting of urea and alkyl carbamate with alcohol in the presence of both a catalyst and a high boiling point organic compound having a boiling point of 180.degree. C. or above.
摘要翻译： 一种碳酸二烷基酯的制造方法，其特征在于，在催化剂和沸点为180℃的高沸点有机化合物的存在下，使选自脲和氨基甲酸烷基酯中的至少一种与醇反应，或 以上。
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公开(公告)号：US5980445A
公开(公告)日：1999-11-09
申请号：US965617
申请日：1997-11-06
摘要： A process for producing diaryl carbonate which comprises (A) a step for producing dialkyl carbonate represented by the general formula RO--CO--OR by reacting urea with alkyl alcohol represented by the general formula ROH, (B) a step for producing both alkyl aryl carbonate represented by the general formula RO--CO--OAr and diaryl carbonate represented by the general formula ArO--CO--OAr by reacting dialkyl carbonate produced in the above step (A) with an aromatic hydroxy compound represented by the general formula ArOH, and (C) a step for producing diaryl carbonate represented by the general formula ArO--CO--OAr by allowing to conduct disproportionation reaction of unreacted alkyl aryl carbonate produced in the above step (B), wherein R shows an alkyl group and Ar shows a non-substituted phenyl group or a phenyl group substituted by alkyl group, alkoxy group, aryl group, aryloxy group or halogen.
摘要翻译： 一种制备碳酸二芳酯的方法，其包括（A）通过脲与由通式ROH表示的烷基醇反应制备由通式RO-CO-OR表示的碳酸二烷基酯的步骤，（B）制备烷基芳基 由通式RO-CO-OAr表示的碳酸酯和由通式ArO-CO-OAr表示的碳酸二芳基酯通过上述步骤（A）中制备的碳酸二烷基酯与由通式ArOH表示的芳族羟基化合物和（ C）通过使上述步骤（B）中产生的未反应的碳酸烷基芳基酯进行歧化反应，制备由通式ArO-CO-OAr表示的碳酸二芳基酯的步骤，其中R表示烷基，Ar表示非 - 取代的苯基或被烷基，烷氧基，芳基，芳氧基或卤素取代的苯基。
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公开(公告)号：US5714627A
公开(公告)日：1998-02-03
申请号：US703885
申请日：1996-08-27
IPC分类号： C07C68/06 , C07C69/773
CPC分类号： C07C68/06
摘要： A process for producing an aromatic carbonate which comprises: reacting a dialkyl carbonate represented by general formula (1) with an aromatic carboxylic acid aryl ester represented by general formula (2) in the presence of a catalyst to produce an aromatic carbonate represented by one or both of general formulae (3) and (4): R--OCOO--R (1) Ar'--COO--Ar (2) Ar--OCOO--R (3) Ar--OCOO--Ar (4) wherein R represents an alkyl group having from 1 to 4 carbon atoms, and Ar and Ar' each represents an unsubstituted phenyl group or a phenyl group substituted by a substituent selected from the group consisting of alkyl, alkoxy, aryl, aryloxy and a halogen atom.
摘要翻译： 一种芳族碳酸酯的制造方法，其特征在于，在催化剂存在下，使由通式（1）表示的碳酸二烷基酯与通式（2）表示的芳香族羧酸芳基酯反应，生成芳香族碳酸酯， 通式（3）和（4）：R-OCOO-R（1）Ar'-COO-Ar（2）Ar-OCOO-R（3）Ar-OCOO-Ar（4）其中R表示 具有1至4个碳原子的基团，Ar和Ar'各自表示未取代的苯基或被选自烷基，烷氧基，芳基，芳氧基和卤素原子的取代基取代的苯基。
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公开(公告)号：US5374375A
公开(公告)日：1994-12-20
申请号：US905193
申请日：1992-06-26
CPC分类号： C09K19/2021 , C07C69/94
摘要： A liquid crystal compound represented by formula (I), ##STR1## wherein A represents --C.sub.3 H.sub.7, --C.sub.4 H.sub.9 or --C.sub.8 H.sub.17 ; when A is --C.sub.3 H.sub.7, m is an integer of 8, 10, 12 or 14; and when A is --C.sub.4 H.sub.9 or --C.sub.8 H.sub.17, m is an integer of 7 to 14,said compound having an antiferroelectric phase.
摘要翻译： 由式（I）表示的液晶化合物，其中A表示-C 3 H 7，-C 4 H 9或-C 8 H 17; 当A为-C 3 H 7时，m为8,10,12或14的整数; 当A为-C4H9或-C8H17时，m为7-14的整数，所述化合物具有反铁电相。
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公开(公告)号：US5587106A
公开(公告)日：1996-12-24
申请号：US467898
申请日：1995-06-06
IPC分类号： C07D239/28 , C09K19/02 , C09K19/34 , C07D239/02 , G02F1/13
CPC分类号： C07D239/28 , C09K19/0266 , C09K19/3463
摘要： Anti-ferroelectric liquid crystal substances which are represented by the formula (1): ##STR1## wherein R is a straight chain alkyl group having 6 to 10 carbon atoms,X is hydrogen or fluorine atom,Z is --CH.sub.3, --CF.sub.3 or --C.sub.2 H.sub.5, andC** stands for an asymmetric carbon atom, andl, m, and n are 0 or a certain integer depending on the specific kinds of X and Z,and the use of the substances for liquid crystal display devices.
摘要翻译： （1）表示的抗铁电液晶物质：（1）C ** H（Z）（CH2）l（O）mCnH21 + 1其中R是直链烷基，具有6〜 10个碳原子，X是氢或氟原子，Z是-CH 3，-CF 3或-C 2 H 5，C **表示不对称碳原子，l，m和n是0或一定的整数，取决于具体的种类 的X和Z，以及使用液晶显示装置的物质。
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公开(公告)号：US06169197A
公开(公告)日：2001-01-02
申请号：US09332951
申请日：1999-06-15
IPC分类号： C07C6808
摘要： A process for separation between dialkyl carbonate and alkyl carbamate which comprises adding an aromatic hydroxy compound to a liquid comprising alkyl carbamate having an alkyl group having 3 to 6 carbon atoms and dialkyl carbonate having alkyl group having 3 to 6 carbon atoms to obtain a mixed liquid, and distilling the mixed liquid thus obtained in a distillation column to obtain a mixture comprising the dialkyl carbonate and the aromatic hydroxy compound from a top section of the distillation column and a liquid comprising the alkyl carbamate from a bottom section of the distillation column.
摘要翻译： 一种分离碳酸二烷基酯和氨基甲酸烷基酯的方法，其包括向包含具有3至6个碳原子的烷基的氨基甲酸酯和具有3至6个碳原子的烷基的碳酸二烷基酯的液体中加入芳族羟基化合物以获得混合液体 并蒸馏在蒸馏塔中得到的混合液体，从蒸馏塔的顶部得到包含碳酸二烷基酯和芳族羟基化合物的混合物，以及包含来自蒸馏塔底部的氨基甲酸烷基酯的液体。
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公开(公告)号：US5364560A
公开(公告)日：1994-11-15
申请号：US827631
申请日：1992-01-29
CPC分类号： C09K19/0266 , C07C69/94 , C09K19/20 , C09K19/2021
摘要： An antiferroelectric liquid crystal compound which is a compound represented by ##STR1## wherein R denotes a linear aliphatic alkyl group having 6 to 14 carbon atoms; A denotes a single bond or an oxygen atom; X and Y independently denote a hydrogen atom or a fluorine atom but they are not hydrogen atoms at the same time; h and i are independently 1 or 2; m is an integer of 3 to 10; Z denotes CH.sub.3, C.sub.2 H.sub.5 or CF.sub.3 ; k is 0 or an integer of 5 to 8; l is 0 or 1; n is an integer of 1 to 6; W denotes CH.sub.3 or CF.sub.3 ; when W is CH.sub.3, p and q are both 0 and r is 8; when W is CF.sub.3, p is 5 to 8, q is 1 and r is 1 to 4; and C* denotes an asymmetric carbon atom,and a liquid crystal display device using same.
摘要翻译： （1）式（I-a）或（3）式（I-c）表示的化合物的反铁电液晶化合物（I-c）其中R表示碳原子数为6〜14的直链脂肪族烷基; A表示单键或氧原子; X和Y独立地表示氢原子或氟原子，但它们不同时为氢原子; h和i独立为1或2; m为3〜10的整数。 Z表示CH3，C2H5或CF3; k为0或5〜8的整数， l为0或1; n为1〜6的整数。 W表示CH3或CF3; 当W为CH3时，p和q均为0，r为8; 当W为CF 3时，p为5至8，q为1且r为1至4; C *表示不对称碳原子，和使用该碳原子的液晶显示装置。
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公开(公告)号：US06777528B2
公开(公告)日：2004-08-17
申请号：US10092592
申请日：2002-03-08
IPC分类号： C08G6402
CPC分类号： C08G64/0208 , C08G64/305
摘要： A process for producing a polycarbonate resin which comprises performing melt polycondensation of pentacyclopentadecanedimethanol or pentacyclopentadecanedimethanol and diol with carbonic acid diester in the presence of a catalyst containing at least one compound selected from the group consisting of zinc compounds, tin compounds, lead compounds, zirconium compounds and hafnium compounds.
摘要翻译： 一种聚碳酸酯树脂的制造方法，其特征在于，在含有选自锌化合物，锡化合物，铅化合物，锆化合物中的至少一种化合物的催化剂的存在下，进行五环十五烷二甲醇或五环十五烷二甲醇和二醇与碳酸二酯的熔融缩聚 和铪化合物。
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公开(公告)号：US5021197A
公开(公告)日：1991-06-04
申请号：US358872
申请日：1989-05-26
IPC分类号： C07C381/12
CPC分类号： C07C381/12
摘要： A process for producing a sulfonium compound of the formula (III) ##STR1## which process comprises reacting a p-dialkylsulfoniophenol of the formula (I) ##STR2## and a carbonyl halogenide compound of the formula (II) ##STR3## in the presence of a secondary amine having a structure in which two secondary alkyl groups are linked to the nitrogen atom, wherein R.sup.1 and R.sup.2 are the same or different and are independently an alkyl group having 1 to 4 carbon atoms, X.sup.1 is a hydrogen atom, a halogen atom or an alkyl group having 1 to 4 carbon atoms, Y.sup.- is a halogen anion, a perchlorate anion, an alkylsulfate anion, a hydrogensulfate anion or a p-toluenesulfonate anion, R is an alkyl group having 1 to 20 carbon atoms, a tert-butoxy group, a benzyloxy group, a p-methoxybenzyloxy group, a phenyl group or a 9-fluorenylmethoxy group, and X.sup.2 is a halogen atom, wherein the reacting is carried out in a solvent selected from the group consisting of polar aprotic solvents, ethers and halogenated hydrocarbons, at a temperature of -80.degree. C. to 30.degree. C. and for a reaction time of 0.5 hour to 10 hours.
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