-
1.发明授权Process for the recovery of 4-hydroxybenzaldehyde from reaction mixtures containing same 失效从含有它们的反应混合物中回收4-羟基苯甲醛的方法
公开(公告)号：US5773664A
公开(公告)日：1998-06-30
申请号：US592162
申请日：1996-01-26
IPC分类号： B01J27/25 , B01J31/22 , C07B61/00 , C07C45/36 , C07C45/78 , C07C45/85 , C07C47/565 , C07C45/81
摘要： A process for separating off poorly soluble by-products from reaction mixtures which are produced in the oxidation of p-cresol with oxygen or an oxygen-containing gas in methanol as solvent in the presence of alkali metal hydroxide and in the presence of metal compounds as catalyst, is characterized in that, after the oxidation, excess alkali is neutralized to the extent that a salt precipitate forms and this salt precipitate is separated off together with the poorly soluble by-products.
摘要翻译： 在碱金属氢氧化物存在下，在甲醇作为溶剂的氧气或含氧气体氧化对甲酚的反应混合物中分离难溶的副产物的方法，在金属化合物存在下，作为 催化剂的特征在于，在氧化之后，过量的碱被中和到形成盐沉淀物的程度，并且该盐沉淀物与难溶的副产物一起分离出来。
-
公开(公告)号：US5808141A
公开(公告)日：1998-09-15
申请号：US897403
申请日：1997-07-21
申请人： Albert Schnatterer , Helmut Fiege
发明人： Albert Schnatterer , Helmut Fiege
IPC分类号： C07B61/00 , C07C303/22 , C07C303/32 , C07C309/40 , C07F11/00 , C07G17/00
CPC分类号： C07C303/22 , C07C303/32
摘要： The new process for preparing 4,4'-dinitrostilbene-2,2'-disulphonic acid and salts thereof by oxidation of 4-nitrotoluene-2-sulphonic acid with an oxidant in the presence of strong bases is characterized in that the oxidation is carried out in a mixture of water and an organic solvent selected from the group consisting of alcohols, ethers and mixtures thereof.
摘要翻译： 通过在强碱存在下用氧化剂氧化4-硝基甲苯-2-磺酸的新的制备4,4'-二硝基二苯乙烯-2,2'-二磺酸的方法及其盐的特征在于进行氧化 在水和选自醇，醚及其混合物的有机溶剂的混合物中。
-
公开(公告)号：US5576463A
公开(公告)日：1996-11-19
申请号：US398228
申请日：1995-03-03
申请人： Albert Schnatterer , Helmut Fiege
发明人： Albert Schnatterer , Helmut Fiege
IPC分类号： C07C201/12 , C07C205/44 , C07C45/32
CPC分类号： C07C201/12
摘要： The new process for the preparation of 2-nitrobenzaldehydes of the general formula ##STR1## in which X.sub.1 and X.sub.2 either independently of one another represent hydrogen or halogen or one of the substituents represents nitro and the other substituent then represents hydrogen,by oxidation of 2-nitrotoluenes of the general formula ##STR2## in which X.sub.1 and X.sub.2 have the meaning indicated above is characterized in that the oxidation with oxygen or an oxygen-containing gas is carried out in the presence of at least one alkoxyalkylamine as a solvent and in the presence of strong bases.
摘要翻译： 制备通式（I）的2-硝基苯甲醛的新方法，其中X 1和X 2彼此独立地表示氢或卤素或一个取代基表示硝基，而另一个取代基则代表氢，由 其中X1和X2具有上述含义的通式为“IMAGE”（II）的2-硝基甲苯的氧化特征在于用氧或含氧气体进行氧化在至少一种烷氧基烷基胺 作为溶剂，并存在强碱。
-
公开(公告)号：US5760247A
公开(公告)日：1998-06-02
申请号：US859625
申请日：1997-05-20
IPC分类号： C07D209/82 , B01J23/38 , B01J23/42 , C07D209/86 , C07D209/84 , C07C211/00
CPC分类号： C07D209/86
摘要： Diphenylamine can be dehydrocyclized on noble metal catalysts in the liquid phase at temperatures of 200.degree. to 340.degree. C. The reaction proceeds with a surprisingly high selectivity.
摘要翻译： 二苯胺可以在200-340℃的温度下在液相中的贵金属催化剂上脱氢环化。反应以令人惊讶的高选择性进行。
-
公开(公告)号：US5130493A
公开(公告)日：1992-07-14
申请号：US681244
申请日：1991-04-05
IPC分类号： B01J31/22 , B01J31/12 , B01J31/18 , C07B61/00 , C07C45/36 , C07C47/565 , C07C47/575
CPC分类号： C07C45/36 , B01J31/183 , B01J2531/0241 , B01J2531/72 , B01J2531/842
摘要： o-Hydroxy-benzaldehydes can be obtained by oxidation of the o-cresols, on which they are based, with oxygen in the presence of substances having a base reaction in a solvent if chelate complexes of iron, manganese or a mixuture of both with polyaza-macrocycles as chelating agents are employed as catalysts. Copper or a copper compound is advantageously added as a co-catalyst.
摘要翻译： 邻羟基苯甲醛可以通过在它们所基于的邻甲酚的氧化作用下，在溶剂中具有碱反应的物质存在下，如果铁，锰的螯合络合物或两者的混合物 作为螯合剂的大环化合物被用作催化剂。 铜或铜化合物有利地作为助催化剂加入。
-
公开(公告)号：US5010193A
公开(公告)日：1991-04-23
申请号：US282712
申请日：1988-12-09
IPC分类号： C07D239/06 , C07D239/10 , C07D239/14 , C07D239/36 , C07D239/46 , C07D239/47 , C07D239/52 , C07F9/6512
CPC分类号： C07D239/06 , C07D239/14 , C07D239/36 , C07D239/46 , C07F9/65125
摘要： A process for the preparation of a compound of the formula ##STR1## in which R is hydrogen, alkoxy, alkylamino, dialkylamino or an optionally substituted radical from the group consisting of alkyl, cycloalkyl, aralkyl and aryl,R.sup.1 is an optionally substituted radical from the group consisting of alkyl, alkoxy, alkylthio, mono- or dialkylamino and phenyl,R.sup.2 is optionally substituted alkyl, andY is oxygen or sulphur,comprising(a1) reacting a compound of the formula ##STR2## with ##STR3## or withR.sup.5 COOHin whichR.sup.5 is R except for hydrogen, or equivalent, to produce ##STR4## oxidizing that compound or its salt to ##STR5## and phosphorylating. Several of the intermediates are new.
摘要翻译： 制备式（I）化合物的方法，其中R是氢，烷氧基，烷基氨基，二烷基氨基或任选取代的基团，其由烷基，环烷基，芳烷基和芳基组成的组中，R 1是任选的 取代基由烷基，烷氧基，烷硫基，一烷基或二烷基氨基和苯基组成的组中，R 2为任选取代的烷基，Y为氧或硫，包括（a1）使式（IIa）化合物与 （III）或其中R5为R的R5 COOH，或氢等价物，以产生氧化该化合物或其盐至（V）并进行磷酸化的（VIa）（Ⅳa）。 几个中间体是新的。
-
公开(公告)号：US4929766A
公开(公告)日：1990-05-29
申请号：US311481
申请日：1989-02-16
申请人： Albert Schnatterer , Helmut Fiege
发明人： Albert Schnatterer , Helmut Fiege
CPC分类号： C07C45/36
摘要： p-Hydroxy-benzaldehydes can be obtained by oxidation of the corresponding p-cresols with oxygen in the presence of basic substances in a solvent, the reaction being carried out in the additional presence of a chelate complex of iron and/or manganese. If desired, the reaction can be carried out in the presence of further metal salts.
摘要翻译： 对 - 羟基 - 苯甲醛可以通过在溶剂中碱性物质存在下用氧气氧化相应的对甲酚来获得，该反应在额外存在铁和/或锰螯合物的情况下进行。 如果需要，反应可以在其它金属盐的存在下进行。
-
公开(公告)号：US06355827B1
公开(公告)日：2002-03-12
申请号：US09485957
申请日：2000-02-18
IPC分类号： C07C25314
CPC分类号： C07C253/14 , C07C2602/08 , C07C255/47
摘要： In a particularly advantageous process for producing 2-cyanoindan-1-ones from 2-halogenated indan-1-ones by reaction with a cyanide salt, the cyanide salt is dissolved in a dipolar aprotic solvent or in a water-miscible ether and 2-halogenated indan-1-one is metered into this solution.
摘要翻译： 在通过与氰化物盐反应从2-卤代茚满-1-酮生成2-氰基茚满-1-酮的特别有利的方法中，将氰化物盐溶于偶极非质子溶剂或水混溶性醚中， 将卤代茚满-1-酮计量加入该溶液中。
-
公开(公告)号：US5872283A
公开(公告)日：1999-02-16
申请号：US883267
申请日：1997-06-26
申请人： Stefan Antons , Guido Steffan , Helmut Fiege
发明人： Stefan Antons , Guido Steffan , Helmut Fiege
CPC分类号： C07C51/38
摘要： Halogenated aromatic carboxylic acids are decarboxylated by heating them in the presence of water at temperatures of 80.degree. to 180.degree. C. and in the presence of water and other acids at temperatures above 80.degree. C.
摘要翻译： 卤化芳族羧酸通过在80℃至180℃的温度和高于80℃的水和其它酸的存在下在水的存在下加热而脱羧。
-
公开(公告)号：US5859296A
公开(公告)日：1999-01-12
申请号：US906322
申请日：1997-08-05
IPC分类号： C07C51/285 , C07C51/43 , C07C51/46 , C07C59/01 , C07C51/42
CPC分类号： C07C51/43 , C07C51/285 , C07C51/46
摘要： Hydroxypivalic acid is obtained from aqueous solutions by removal of the water by azeotropic distillation and subsequent crystallization from a solvent mixture which is composed of a polar and a non-polar component. The distillation is carried out under reduced pressure and at a maximum bottom temperature of 90.degree. C., until a residual water content of at least 0.1% of the total weight of the resulting solution is achieved.
摘要翻译： 通过共沸蒸馏除去水并随后从由极性和非极性组分组成的溶剂混合物结晶，从水溶液中获得羟基新戊酸。 蒸馏在减压下和最低90℃的最低温度下进行，直到达到所得溶液总重量的至少0.1％的残留水含量为止。
-
-
-
-
-
-
-
-
-
搜索结果
85 条记录 (耗时 0.023 秒)
