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公开(公告)号：US4332939A
公开(公告)日：1982-06-01
申请号：US246968
申请日：1981-03-24
IPC分类号： B01J21/00 , B01J21/18 , C07B61/00 , C07D251/28
CPC分类号： C07D251/28
摘要： A process for the preparation of a fluorinated s-triazine, which comprises reacting a cyanuric halide, which contains at least one halogen other than fluorine, with hydrogen fluoride in the presence of active charcoal.
摘要翻译： 一种制备氟化均三嗪的方法，其包括在活性炭存在下使包含至少一种氟以外的卤素的氰尿酰卤与氟化氢反应。
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公开(公告)号：US4922008A
公开(公告)日：1990-05-01
申请号：US45734
申请日：1987-04-29
申请人： Gottfried Seifert , Sebastian Staubli , Josef H. Wieland , Willy Regenass , Martin Buerli , John G. Lee , Richard B. Lund
发明人： Gottfried Seifert , Sebastian Staubli , Josef H. Wieland , Willy Regenass , Martin Buerli , John G. Lee , Richard B. Lund
IPC分类号： C07C309/40 , C07C20060101 , C07C67/00 , C07C301/00 , C07C303/06 , C07C305/06 , C11D3/42
CPC分类号： C07C309/00
摘要： A process for the preparation of 4-nitrotoluene-2-sulfonic acid by sulfonating 4-nitrotoluene with oleum or liquid SO.sub.3 is described. The sulfonation is carried out continuously with oleum of at least 50% concentration or liquid 100% SO.sub.3 while keeping the conversion of 4-nitro-toluene in the reaction mixture at .gtoreq.90% during the entire reaction course.The process is inherently non-polluting, and provides the product in high yield and low sulfuric acid content in a form usable for 4,4'-dinitrostilbene-2,2'-disulfonic acid production without further purification.
摘要翻译： 描述了通过用发烟硫酸或液体SO 3磺化4-硝基甲苯来制备4-硝基甲苯-2-磺酸的方法。 在整个反应过程中，在保持反应混合物中4-硝基 - 甲苯转化率为≥90％的同时，连续进行磺化至少50％浓度的发烟硫酸或液体100％SO 3。 该方法固有地是无污染的，并且以不用进一步纯化即可生产可用于4,4'-二硝基二苯乙烯-2,2'-二磺酸生产的形式的高产率和低硫酸含量的产品。
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公开(公告)号：US5097041A
公开(公告)日：1992-03-17
申请号：US595917
申请日：1990-10-11
IPC分类号： C07D249/20
CPC分类号： C07D249/20
摘要： There is disclosed a process in which a melt of a 2-aryl-2H-benzotriazole containing colored contaminants, or a solution thereof in an organic nonpolar solvent, is purified by treatment with a strongly acidic synthetic cationic exchange resin.
摘要翻译： 公开了通过用强酸性合成阳离子交换树脂处理来纯化含有着色污染物的2-芳基-2H-苯并三唑或其有机非极性溶剂中的溶液的熔融物的方法。
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4.发明授权Process for the production of 1,3,4-thiadiazol-5(4H)-onyl dithiophosphoric acid esters 失效制备1,3,4-噻二唑-5（4H） - 基二硫代磷酸酯的方法
公开(公告)号：US4035378A
公开(公告)日：1977-07-12
申请号：US627998
申请日：1975-11-03
IPC分类号： C07F9/553 , C07F9/6503 , C07F9/6521 , C07F9/653 , C07D285/12
CPC分类号： C07F9/65218 , C07F9/5537 , C07F9/65032 , C07F9/65312 , C07F9/65324
摘要： 1,3,4-Thiadiazol-5-(4H)-onyl-(4)-methyl dithiophosphoric acid ester of the formula ##STR1## wherein each of R, R.sub.1 and R.sub.2 methyl or ethyl and Y represents oxygen or sulphur, are prepared by condensing a thiophosphate acid of the formula ##STR2## or an alkali metal or ammonium salt thereof, with a 1,3,4-thiadiazole of the formula ##STR3## with formaldehyde in an aqueous medium consisting essentially of 60-98 wt % of sulphuric acid, the amount of sulphuric acid is at least 0.7 mol per mol of free thiophosphoric acid, if free acid is used, and 1.7 mol per mol of thiophosphoric acid salt, if a salt is used. The temperature of the reaction mixture is maintained at 15.degree.-60.degree. C. The process is particularly useful in the preparation of O,O-dimethyl-S-[2-methoxy-1,3,4-thiadiazol-5(4H)-onyl-(4)-methyl]-dithiophosphate (methidathion).
摘要翻译： 式（I）的1,3,4-噻二唑-5-（4H） - 基 - （4） - 甲基二硫代磷酸酯，其中R，R 1和R 2中的每一个是甲基或乙基，Y代表氧或硫 是通过将下式（IMAGE）的硫代磷酸或其碱金属或铵盐与式（III）的1,3,4-噻二唑与基本上由 60-98重量％的硫酸，如果使用游离酸，硫酸的量相对于每摩尔游离硫代磷酸为至少0.7摩尔，如果使用盐，硫酸的量为1.7摩尔/摩尔硫代磷酸盐。 反应混合物的温度保持在15°-60℃。该方法特别可用于制备O，O-二甲基-S- [2-甲氧基-1,3,4-噻二唑-5（4H） （4） - 甲基] - 磷酸碘（甲硫氨酸）。
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公开(公告)号：US4199529A
公开(公告)日：1980-04-22
申请号：US947291
申请日：1978-09-29
IPC分类号： C07C309/47 , C07C20060101 , C07C67/00 , C07C301/00 , C07C303/06 , C07C139/00 , C07C143/60
CPC分类号： C07C303/06
摘要： A process for the production of amino-I-acid (2-naphthylamino-5,7-disulfonic acid) starting from Tobias acid (2-naphthylamine-1-sulfonic acid), which comprises sulfonating Tobias acid with fuming sulfuric acid (oleum) isothermically at room temperature, further sulfonating the resulting 2-naphthylamine-1,5-disulfonic acid without isolation, by rapidly heating the reaction mixture to 110.degree. to 140.degree. C. to give 2-naphthylamine-1,5,7-trisulfonic acid, hydrolyzing the trisulfonic acid in sulfuric acid having a concentration between 80 and 98%, at a temperature of 100.degree.-180.degree. C., to give the amino-I-acid, precipitating this latter from dilute sulfuric acid and isolating it from the reaction mixture, and the amino-I-acid obtained by this process.
摘要翻译： 由Tobias酸（2-萘胺-1-磺酸）制备氨基-1-酸（2-萘基氨基-5,7-二磺酸）的方法，其包括用发烟硫酸（发烟硫酸）磺化Tobias酸， 在室温下等温，不经分离进一步磺化所得的2-萘胺-1,5-二磺酸，通过将反应混合物快速加热至110-140℃，得到2-萘胺-1,5,7-三磺酸 ，在100-180℃的温度下将浓度为80-98％的硫酸中的三磺酸水解，得到氨基-1-酸，将其从稀硫酸中沉淀出来并将其从 反应混合物和通过该方法获得的氨基-1-酸。
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公开(公告)号：US4510100A
公开(公告)日：1985-04-09
申请号：US559149
申请日：1983-12-07
IPC分类号： C07C309/47 , C07C67/00 , C07C301/00 , C07C303/08 , C07C303/32 , C07C143/60
CPC分类号： C07C309/00
摘要： The invention relates to an improved process for the production of 2-amino-1-naphthalenesulfonic acid (Tobias acid). This improved process makes it possible to obtain Tobias acid which has only a very low content of 2-aminonaphthalene and in high space-time yield. The process starts from 2-hydroxynaphthalene and comprises the following main reaction steps:(a) the sulfonation of 2-hydroxynaphthalene to 2-hydroxynaphthalene-1-sulfonic acid (oxy-Tobias acid) with chlorosulfonic acid, in an inert organic solvent;(b) the neutralization of the liberated hydrochloric acid and excess chlorosulfonic acid still present in the reaction medium and conversion of the 2-hydroxynaphthalene-1-sulfonic acid obtained into the corresponding ammonium salt with ammonia;(c) conversion of the 2-hydroxy group into the 2-amino group by the Bucherer reaction; and(d) the subsequent precipitation of the Tobias acid with dilute sulfuric acid.
摘要翻译： 本发明涉及一种生产2-氨基-1-萘磺酸（托比亚酸）的改进方法。 这种改进的方法使得可以获得仅具有非常低的2-氨基萘含量和高空时收率的托比亚酸。 该方法从2-羟基萘开始，包括以下主要反应步骤：（a）在惰性有机溶剂中用氯磺酸将2-羟基萘磺化为2-羟基萘-1-磺酸（氧 - 托比酸）; （b）中和反应介质中仍然存在的游离的盐酸和过量的氯磺酸，并将得到的2-羟基萘-1-磺酸转化为相应的铵盐与氨; （c）通过Bucherer反应将2-羟基转化为2-氨基; 和（d）随后用稀硫酸沉淀托比亚酸。
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