公开(公告)号：US4990663A

公开(公告)日：1991-02-05

申请号：US351696

申请日：1989-05-15

申请人： Yu-Wei Chang ,  Robert L. Seagraves

发明人： Yu-Wei Chang ,  Robert L. Seagraves

IPC分类号： B01J23/42 ,  B01J23/89 ,  C07B61/00 ,  C07C209/36 ,  C07C209/90 ,  C07C211/52

CPC分类号： C07C209/36 ,  C07C209/365 ,  C07C209/90

摘要： This invention relates to a process for the hydrogenation of halogenated aromatic nitro compounds to the corresponding halogenated amines using a platinum catalyst in the presence of certain aminoalkyl ethers or alkanolamines. It relates in addition to halogenated aromatic amines containing an amount of such aminoalkyl ether or alkanolamine effective to stabilize said halogenated aromatic amine. The storage stabilizers and dehalogenation inhibitors contain a total of 2 to 6 carbon atoms and can be represented by the formula:R.sup.1 --(R.sup.2)--N--(CH.sub.2).sub.n --O--R.sup.3wherein R.sup.1 and R.sup.2 may be the same or different --H or --CH.sub.2 CH.sub.2 OH, n is an integer from 2 to 3, and R.sup.3 is either --H or --CH.sub.3.

公开(公告)号：US5113016A

公开(公告)日：1992-05-12

申请号：US570311

申请日：1990-08-20

申请人： Robert L. Seagraves

发明人： Robert L. Seagraves

IPC分类号： C07C51/60

CPC分类号： C07C51/60

摘要： Excess terephthalic acid or isophthalic acid is reacted with a phosgene/DMF complex nearly to completion in one or more stages to form terephthaloyl chloride or isophthaloyl chloride; in another stage, by-product formylbenzoyl chloride is oxidized and terephthaloyl chloride or isophthaloyl chloride containing less than 100 ppm of formylbenzoyl chloride and/or dichlorotoluoylchloride is recovered.

摘要翻译： 将过量的对苯二甲酸或间苯二甲酸与光气/ DMF络合物在一个或多个阶段中几乎完成反应以形成对苯二甲酰氯或间苯二酰氯; 在另一阶段，副产物甲酰基苯甲酰氯被氧化，并回收含有小于100ppm甲酰基苯甲酰氯和/或二氯甲酰氯的对苯二酰氯或间苯二酰氯。

公开(公告)号：US4212824A

公开(公告)日：1980-07-15

申请号：US923568

申请日：1978-07-11

申请人： Robert L. Seagraves

发明人： Robert L. Seagraves

IPC分类号： B01J21/18 ,  B01J23/89 ,  C07B61/00 ,  C07C67/00 ,  C07C209/00 ,  C07C209/36 ,  C07C85/11 ,  B01J23/42 ,  B01J23/74

CPC分类号： B01J23/8906 ,  C07C209/36

摘要： An iron-modified, platinum hydrogenation catalyst useful for the reduction of aromatic nitro compounds is provided. The catalyst, having improved distribution of the metallic components on an oleophilic carbon support as shown by ESCA analysis, is prepared by depositing a platinum compound (oxide, hydroxide or carbonate) on the carbon support at a temperature in the range of 55.degree.-95.degree. C., preferably 90.degree.-95.degree. C., and then reducing the compound to platinum metal, preferably with formaldehyde, at a temperature less than about 35.degree. C. The iron in the catalyst is present and deposited as its oxide or hydroxide either at the same temperature as the platinum compound or at a temperature less than about 35.degree. C. Using such a catalyst to reduce halogen-substituted nitro aromatic compounds to the corresponding amines results in low dehalogenation, low tar formation and hydroxylamine accumulation. For nonhalogenated nitro aromatic reductions, the catalyst minimizes ring reduction.

摘要翻译： 提供了用于还原芳族硝基化合物的铁改性的铂氢化催化剂。 通过ESCA分析所示，具有改善的亲油性碳载体上的金属组分分布的催化剂通过在碳载体上在55℃-95℃的温度下沉积铂化合物（氧化物，氢氧化物或碳酸盐） ℃，优选90℃-95℃，然后在低于约35℃的温度下将化合物还原为铂金属，优选用甲醛还原。催化剂中的铁存在并沉积为其氧化物或氢氧化物 在与铂化合物相同的温度下或在低于约35℃的温度下，使用这种催化剂将卤素取代的硝基芳族化合物还原成相应的胺，导致低脱卤，低焦油形成和羟胺积累。 对于非卤代硝基芳香族还原，催化剂使环还原最小化。

公开(公告)号：US5003105A

公开(公告)日：1991-03-26

申请号：US543387

申请日：1990-06-26

申请人： Robert L. Seagraves

发明人： Robert L. Seagraves

IPC分类号： C07C51/62

CPC分类号： C07C51/62

摘要： A process for preparing 2-chloroterephthaloyl chloride which comprises reacting terephthaloyl chloride with chlorine in the presence of an anhydrous ring chlorination catalyst. When the reaction mixture contains the desired amount of the monochloro product, the mixture is cooled to room temperature and the 2-chloroterephthaloyl chloride is isolated.

摘要翻译： 一种制备2-氯对苯二甲酰氯的方法，其包括在无水环氯化催化剂存在下使对苯二甲酰氯与氯反应。 当反应混合物含有所需量的一氯代产物时，将混合物冷却至室温，分离出2-氯对苯二酰氯。