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1. 发明授权

US4414412A Process for the preparation of unsaturated carboxylic acids by the catalytic oxidation in gaseous phase of the corresponding aldehydes and catalyst used in said process 失效
标题翻译：通过在所述方法中使用的相应醛和催化剂的气相中的催化氧化制备不饱和羧酸的方法
公开(公告)号：US4414412A
公开(公告)日：1983-11-08
申请号：US629985
申请日：1975-11-07
申请人： Giordano DeAlberti , Romano Covini , Mario Padovan , Giancarlo Battiston , Guido Petrini
发明人： Giordano DeAlberti , Romano Covini , Mario Padovan , Giancarlo Battiston , Guido Petrini
IPC分类号： B01J23/00 , B01J23/30 , B01J23/68 , C07B61/00 , C07C51/00 , C07C51/25 , C07C57/055 , C07C67/00 , C07C51/26 , B01J23/22 , B01J23/28
CPC分类号： B01J23/687 , B01J23/30 , C07C51/252
摘要： A process is disclosed for the preparation of acrylic acid or methacrylic acid by reacting in vapor phase acrolein or methacrolein with molecular oxygen or with an oxygen-containing gas, at a temperature between 200.degree. and 350.degree. C., in the presence of a solid catalyst and with a contact time between 0.5 and 5 seconds, characterized in that said catalyst consists of molybdenum, vanadium, tungsten, one or more of the elements selected from the class consisting of silver, titanium, chromium, cerium, lanthanum and tantalum, and oyxgen chemically combined with the above-indicated elements, and wherein the atomic ratios between the various elements present in the catalyst are represented by the empirical formula:Mo.sub.12 V.sub.a W.sub.b X.sub.c O.sub.dwhereinX represents one or more of the elements Ag, Ti, Cr, Ce, La, Ta;a varies between 0.5 and 10;b varies between 0.5 and 8;c varies between 0.1 and 3 for X=Ag and from 0.3 to 4 for each of the elements Ti, Cr, Ce, La, Ta; with the further proviso that if X consists of 2 or more elements, then their sum shall not exceed 8 atoms; andd is a number that satisfies the valency requirements of the other elements.The catalyst may be carried on a support, and the reaction may be carried out in the presence of an inert gaseous diluent or water vapor.
摘要翻译：公开了一种通过气相丙烯醛或甲基丙烯醛与分子氧或含氧气体在200-350℃的温度下在固体存在下反应来制备丙烯酸或甲基丙烯酸的方法催化剂，接触时间在0.5至5秒之间，其特征在于所述催化剂由钼，钒，钨，选自银，钛，铬，铈，镧和钽中的一种或多种元素组成，以及氧化合物与上述元素化学结合，并且其中存在于催化剂中的各种元素之间的原子比由经验式表示：Mo12VaWbXcOd其中X表示元素Ag，Ti，Cr，Ce，La中的一种或多种， Ta a在0.5和10之间变化; b在0.5和8之间变化; 对于X = Ag，c在0.1和3之间变化，并且对于元素Ti，Cr，Ce，La，Ta中的每一种，c为0.3至4; 进一步的条件是，如果X由2个或更多个元素组成，那么它们的和不得超过8个原子; 且d为满足其他要素的化合价要求的数。催化剂可以承载在载体上，反应可以在惰性气体稀释剂或水蒸汽的存在下进行。

2. 发明授权

US4146732A Process for preparing unsaturated carboxylic acids by the catalytic oxidation in the gas phase of the corresponding aldehydes 失效
标题翻译：通过催化氧化在相应的二氧化碳气相中制备不饱和羧酸的方法
公开(公告)号：US4146732A
公开(公告)日：1979-03-27
申请号：US797671
申请日：1977-05-17
申请人： Mario Padovan , Giancarlo Battiston , Francesco Pignataro , Giordano DeAlberti , Giuseppe Leofanti
发明人： Mario Padovan , Giancarlo Battiston , Francesco Pignataro , Giordano DeAlberti , Giuseppe Leofanti
IPC分类号： B01J23/847 , B01J23/00 , B01J23/88 , B01J23/882 , B01J37/04 , C07B61/00 , C07C51/00 , C07C51/25 , C07C57/055 , C07C67/00 , C07C51/32 , C07C57/04
CPC分类号： B01J23/8877 , C07C51/252 , B01J2523/00
摘要： A process is disclosed for preparing unsaturated carboxylic acids consisting essentially in reacting in the vapor phase an unsaturated aldehyde with molecular oxygen or an oxygen-containing gas, at a temperature ranging from 200.degree. to 370.degree. C., in the presence of a solid catalyst, with a contact time between 0.5 and 5 seconds, characterized in that the catalyst consists essentially of molybdenum, vanadium, cobalt, and optionally tungsten, these elements being chemically combined with oxygen and the atomic ratios of the elements being represented by the empirical formula Mo.sub.12 V.sub.a W.sub.b Co.sub.c O.sub.dA is between 1.5 and 3.0;B is between 0 and 0.5;C is between 3.5 and 5.5; andD is a number sufficient to satisfy the valences of the other elements,Said catalyst being prepared starting from aqueous solutions of soluble salts of the elements composing it, by the coprecipitation method. Preferably, the coprecipitation is effected at a pH ranging from 2 to 5 and at a temperature between 20.degree. and 90.degree. C., by adding to a first solution containing cobalt in the form of the nitrate, a second solution containing molybdenum, vanadium, and optionally also tungsten, in the form of ammonium salts. The catalyst may be deposited on a carrier. Acrolein may be oxidized to acrylic acid, or methacrolein oxidized to methacrylic acid.

3. 发明授权

US4113769A Process for preparing unsaturated carboxylic acids by gas phase catalytic oxidation of the corresponding aldehydes 失效
标题翻译：通过气相催化氧化相应的醛制备不饱和羧酸的方法
公开(公告)号：US4113769A
公开(公告)日：1978-09-12
申请号：US734248
申请日：1976-10-20
申请人： Mario Padovan , Giordano De Alberti , Giancarlo Battiston , Romano Covini
发明人： Mario Padovan , Giordano De Alberti , Giancarlo Battiston , Romano Covini
IPC分类号： C07B61/00 , B01J23/00 , C07C51/00 , C07C51/25 , C07C57/055 , C07C67/00 , C07C51/32
CPC分类号： C07C51/252
摘要： A process is disclosed for preparing acrylic acid or methacrylic acid comprising reacting in vapor phase acrolein or methacrolein (respectively) with molecular oxygen or an oxygen-containing gas, at a temperature between 200.degree. and 350.degree. C, in the presence of a solid catalyst, and with a contact time between 0.5 and 5 seconds, characterized in that the solid catalyst comprises molybdenum, vanadium, tungsten, cobalt, chromium and oxgyen chemically combined with these elements, the atomic ratios among the aforesaid elements being represented by the empirical formula: Mo.sub.12 V.sub.a W.sub.b Co.sub.c Cr.sub.d O.sub.e, wherein:a is between 0.5 and 10,b is between 0.5 and 8,c is between 1 and 6,d is between 0.1 and 3, ande is a number sufficient to satisfy the valence requirements of the other elements;And with the further proviso that a+b+c is equal to or greater than 8.5. The catalyst is preferably used while on a carrier, and the reaction is preferably carried out in the presence of an inert gaseous diluent or water vapor.
摘要翻译：公开了一种制备丙烯酸或甲基丙烯酸的方法，包括在200至350℃的温度下，在固体催化剂存在下，将气相丙烯醛或甲基丙烯醛（分别）与分子氧或含氧气体反应并且接触时间在0.5至5秒之间，其特征在于固体催化剂包括与这些元素化学结合的钼，钒，钨，钴，铬和氧，上述元素中的原子比由经验式表示： Mo12 VaWbCocCrdOe，其中：

4. 发明授权

US3981912A Process for the preparation of unsaturated carboxylic acids by the catalytic oxidation in gaseous phase of the corresponding aldehydes 失效
标题翻译：通过在相应醛的气相中的催化氧化制备不饱和羧酸的方法
公开(公告)号：US3981912A
公开(公告)日：1976-09-21
申请号：US629986
申请日：1975-11-07
申请人： Giancarlo Battiston , Guido Petrini , Giordano De Alberti , Romano Covini
发明人： Giancarlo Battiston , Guido Petrini , Giordano De Alberti , Romano Covini
IPC分类号： B01J23/00 , B01J23/28 , B01J23/34 , B01J23/887 , C07B61/00 , C07C51/00 , C07C51/25 , C07C57/055 , C07C67/00 , C07C51/32
CPC分类号： B01J23/8877 , B01J23/28 , B01J23/34 , C07C51/252 , B01J2523/00
摘要： A process is disclosed for the preparation of acrylic acid or methacrylic acid, comprising reacting in vapor phase acrolein or methacrolein with molecular oxygen or an oxygen-containing gas, at a temperature between 200.degree. and 350.degree.C, in the presence of a solid catalyst, and with a contact time between 0.5 and 5 seconds, wherein the catalyst consists of molybdenum, vanadium, tin, and one of the elements chromium, nickel, manganese, as well as oxygen chemically combined with the above-indicated elements, the atomic ratios of the elements being represented by the empirical formula:Mo.sub.12 V.sub.a Sn.sub.b X.sub.c O.sub.dWherein:X is Cr or Ni or Mn;a is between 0.5 and 10;b is between 0.4 and 4;c is between 0.3 and 3.5; andd is a number that satisfies all the valency requirements of the other elements.The catalyst may be used on a carrier, and the oxidation reaction may be carried out in the presence of an inert gaseous diluent or water vapor.
摘要翻译：公开了制备丙烯酸或甲基丙烯酸的方法，包括在200至350℃的温度下，在固体催化剂存在下，使气相丙烯醛或甲基丙烯醛与分子氧或含氧气体反应，并且接触时间在0.5和5秒之间，其中催化剂由钼，钒，锡和元素铬，镍，锰中的一种以及与上述元素化学结合的氧，原子比的元素由经验公式表示：

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