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1.发明授权Method of recovering in active form the catalyst for the terephthalic acid synthesis 失效以活性形式回收对苯二甲酸合成催化剂的方法
公开(公告)号：US4356319A
公开(公告)日：1982-10-26
申请号：US226382
申请日：1981-01-19
申请人： Paolo Roffia , Pierangelo Calini , Sergio Tonti
发明人： Paolo Roffia , Pierangelo Calini , Sergio Tonti
IPC分类号： C07C51/265 , B01J23/94 , B01J25/00 , B01J31/40 , B01J38/00 , C07C51/00 , C07C51/42 , C07C63/26 , C07C67/00 , C07C51/29
CPC分类号： B01J31/04 , B01J31/4015 , B01J31/403 , C07C51/42 , B01J2231/70 , B01J2531/72 , B01J2531/845 , Y02P20/52 , Y02P20/584
摘要： A method of recovering the catalyst in active form from the acetic mother liquors from the synthesis of terephthalic acid. From said mother liquors, after removal of water, there is removed by evaporation an amount of from 70 to 90% of the CH.sub.3 COOH present therein. The concentrated liquor is cooled below 60.degree. C. and the solid which precipitates is collected and recycled for reuse in the systhesis. The liquid phase is extracted with water or with an aqueous acetic acid solution in the presence of particular coadjuvants such as isobutyl acetate, and the aqueous phase, which contains the recovered catalyst, is recycled to the original synthesis.
摘要翻译： 从对苯二甲酸的合成从乙酸母液中回收活性形式的催化剂的方法。 从所述母液中除去水后，通过蒸发除去其中存在的CH 3 COOH的70-90％。 将浓缩液冷却至60℃以下，收集析出的固体并将其循环再利用于合成。 在特殊的辅助剂如乙酸异丁酯存在下，用水或乙酸水溶液萃取液相，含有回收的催化剂的水相再循环到原始合成中。
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公开(公告)号：US4918194A
公开(公告)日：1990-04-17
申请号：US262354
申请日：1988-10-25
IPC分类号： C07D295/22 , B01J29/035 , B01J29/04 , C07B43/00 , C07B61/00 , C07C239/08 , C07D295/24
CPC分类号： C07D295/24 , Y02P20/582
摘要： The invention relates to a process for the synthesis of an N,N-dialkyl-hydroxylamine by reaction of the corresponding dialkylamine with H.sub.2 O.sub.2, said reaction being carried out in the presence of a catalyst based on titanium-silicalite.
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3.发明授权
公开(公告)号：US5227525A
公开(公告)日：1993-07-13
申请号：US822907
申请日：1992-01-21
申请人： Sergio Tonti , Paolo Roffia , Vittorio Gervasutti
发明人： Sergio Tonti , Paolo Roffia , Vittorio Gervasutti
IPC分类号： B01J21/06 , C07B61/00 , C07C249/04 , C07C249/08 , C07C249/14 , C07C251/32 , C07C251/44
CPC分类号： C07C249/04 , C07C2101/14
摘要： A multistep process for the liquid phase ammoximation of carbonyl compounds with H.sub.2 O.sub.2 and NH.sub.3, at 60.degree.-100.degree. C., at 1.5-5 bar and in the presence of a catalyst based on silicon, titanium and oxygen, characterized in that:a) in one or more primary steps, the H.sub.2 O.sub.2 : carbonyl compound molar ratio ranges from 0.9 to 1.15 by mols and the carbonyl component conversion is carried out up to at least 95%;b) in a last (exhaustion) step the H.sub.2 O.sub.2 : carbonyl compound ratio is in a higher range, i.e. from 1.5 to 3.0 by mols.
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4.发明授权Process for producing modified, impact-resistant polyamides with lactam-blocked diisocyanate/monoisocyanate 失效用内酰胺封端二异氰酸酯/单异氰酸酯生产改性耐冲击聚酰胺的方法
公开(公告)号：US4940773A
公开(公告)日：1990-07-10
申请号：US377964
申请日：1989-07-11
申请人： Sergio Tonti , Piero Furlan , Gianpietro Talamini
发明人： Sergio Tonti , Piero Furlan , Gianpietro Talamini
摘要： A process for producing modified, impact-resistant polyamides showing an increased polymerization rate, which consists in polymerizing an .omega.-lactam in the presence of:(a) a mixture of an organic di-isocyanate and an organic mono-isocyanate, the isocyanate groups of both of which are blocked with an .omega.-lactam;(b) a poly-oxy-alkylene-amine having an aminic functionality lower than 3, and(c) an alkaline catalyst.
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5.发明授权Process for producing large-size formed articles consisting of a modified polyamide 失效制备改性聚酰胺的大型成型物品的方法
公开(公告)号：US5205975A
公开(公告)日：1993-04-27
申请号：US501477
申请日：1990-03-30
申请人： Piero Furlan , Sergio Tonti , Gianpietro Talamini
发明人： Piero Furlan , Sergio Tonti , Gianpietro Talamini
IPC分类号： C08G18/50 , C08G18/80 , C08G69/04 , C08G69/16 , C08G69/20 , C08G69/40 , C08L75/02 , C08L77/02
CPC分类号： C08L77/02 , C08G18/5024 , C08G18/8074 , C08G69/16 , C08G69/40 , C08L75/02 , Y10S264/56 , Y10S264/61
摘要： A process for producing large-size formed articles consisting of a modified polyamide, by polymerization of a mixture containing, besides the omega-lactam corresponding to the polyamide, the following reagents:a) a polymerization catalyst selected from the sodium salt and the potassium salt of said omega-lactam;b) a polyoxyalkylene polyamine having a molecular weight ranging from 400 to 5,000 and an amine functionality ranging from 1.9 to 2.5;c) an activator consisting of a polyisocyanate having all the isocyanic groups blocked with a lactam;said reagents being fed, at a temperature of from 105.degree. to 125.degree. C., to a mold heated to 130.degree.-170.degree. C.
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公开(公告)号：US4789741A
公开(公告)日：1988-12-06
申请号：US165234
申请日：1988-03-07
IPC分类号： B01J19/26 , C07D201/04
CPC分类号： C07D201/04 , B01J19/26 , B01J2219/00119
摘要： The invention concerns a two-step process for the synthesis of caprolactam by reaction of cylcohexanone-oxime with an excess of oleum, carried out in a first step with only a portion of the oxime and in the presence of liquid SO.sub.2, according to usual "cold" techniques, the amount of free SO.sub.3 in the oleum being equal to or greater than 50% by weight, wherein said "cold" step is completed by a second "hot" step, by adding a second portion of oxime, the ratio between said second portion and said first portion ranging from 0.5 to 1.2.
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7.发明授权Polymerization of lactam polyisocyanate having the isocyanate groups blocked with lactam 失效具有用内酰胺封端的异氰酸酯基团的内酰胺多异氰酸酯的聚合
公开(公告)号：US4939234A
公开(公告)日：1990-07-03
申请号：US295397
申请日：1989-01-10
摘要： Process of preparing modified polyamides endowed with improved mechanical properties, which process resides in polymerizing an .omega.-lactam in the presence of(a) a polyisocyanate having the isocyanate groups blocked by an .omega.-lactam,(b) a poly-oxy-alkylene-amine, and(c) an alkali metal catalyst.A further object of the invention is the products obtained by means of such a process.
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