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公开(公告)号：EP1133460A1
公开(公告)日：2001-09-19
申请号：EP99957297.7
申请日：1999-11-11
IPC分类号： C07C7/20
摘要： Subject of the invention is a composition stabilized against premature polymerization comprising a) a light olefin monomer, and an effective polymerization inhibiting amount of b) at least one phenylenediamine of formula (I) wherein R1, R2, and R3 are the same or different and are hydrogen, straight or branched chain alkyl of 1 to 20 carbon atoms, straight or branched chain alkyl of 1 to 20 carbon atoms which is substituted by one to three aryl groups, aryl of 1 to 12 carbon atoms, or aryl of 1 to 12 carbon atoms which is substituted by one to three alkyl groups of 1 to 6 carbon atoms; and c) at least one nitroxide of formula (II) wherein R4 and R5 are independently alkyl of 1 to 4 carbon atoms or are together pentamethylene; and Z1 and Z2 are each methyl or Z1 and Z2 together form a linking moiety which may or may not contain heteroatoms or carbonyl groups and which additionally may be substituted by hydroxy, cyanohydrin, amino, alkoxy, amido, ketal, carboxy, hydantoin, carbamate, or a urethane group. A further subject of the invention is a method for inhibiting the premature polymerization of reactive light olefins and the use of a phenylendiamine together with at least one nitroxide to prevent polymerization of reactive light olefins.
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2.发明公开Method of inhibiting vapor phase fouling in vinyl monomer systems 审中-公开维生素Zur Hemmung der Dampfphase-Polymerization in Vinylmonomersystemen
公开(公告)号：EP1077206A1
公开(公告)日：2001-02-21
申请号：EP00115647.0
申请日：2000-07-20
摘要： Vapor-phase vinyl polymerization fouling in monomer systems is inhibited by the use of an effective amount of an antipolymerant selected from stable free radicals, volatile alkylamines, or both. The preferred nitroxide is 3,6-dihydro-2, 2,6,6-tetramethyl-1(2H)-pyridinyloxy, and the preferred alkylamines are primary and secondary amines of methyl, ethyl, and propyl alkyls.
摘要翻译： 通过使用有效量的选自稳定的自由基，挥发性烷基胺或两者的抗分解剂来抑制单体体系中的气相乙烯基聚合结垢。 优选的氮氧化物是3,6-二氢-2,2,6,6-四甲基-1（2H） - 吡啶氧基，优选的烷基胺是烷基甲基，乙基和丙基的伯胺和仲胺。
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3.发明公开Method for removal of aldehydes from chemical manufacturing production streams during distillative purification 审中-公开通过蒸馏纯化过程中产品的一种用于从化学工艺中分离醛的过程流
公开(公告)号：EP0999207A2
公开(公告)日：2000-05-10
申请号：EP99307810.4
申请日：1999-10-04
IPC分类号： C07C253/34 , C07C255/08
CPC分类号： C07C253/34 , Y10S203/03 , C07C255/08
摘要： A method for improving purification efficiency when distilling off aldehyde contaminants during chemical manufacturing processes by adding a substituted aromatic amine having electron donating group substituents prior to the distillation column. The method is particularly useful for removal of aldehydes such as acrolein, generated as a by-product of acrylonitrile manufacture. Preferred aromatic amines are 2-amino aniline, 3,4-dimethyl aniline and 4-ethyl aniline.
摘要翻译： 一种用于净化方法提高效率。当通过添加具有电子之前的蒸馏塔供给性基团的取代基的substituiertem芳香胺蒸馏除去在化学生产过程的醛杂质。 该方法是用于除去醛的特别有用的：例如丙烯醛，生成丙烯腈制造的副产物。 优选的芳族胺是2-氨基苯胺，3,4-二甲基苯胺和4-乙基苯胺。
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公开(公告)号：EP0965657A1
公开(公告)日：1999-12-22
申请号：EP99304781.0
申请日：1999-06-18
CPC分类号： C23F11/04 , C23F11/122 , C23F11/146 , C23F11/149
摘要： A corrosion inhibiting aqueous composition comprises one or more aldehyde oligomers having the general formula
wherein R 1 is phenyl or substituted phenyl, R 2 and R 3 are each hydrogen, a saturated or unsaturated aliphatic group or an aryl group, R 4 is hydrogen, -(NH-CH 2 -CH 2 -) m -NH-CH 2 CH 2 NH 2 where m is from 0 to 5, or a tris(2-aminoethyl)amine group, X is oxygen or = NH, and each of the above may also be any other value which does not adversely affect the composition. The compositions are for addition to corrosive aqueous acid solutions to reduce or inhibit the corrosive effects thereof on metal surfaces.摘要翻译： 腐蚀抑制水性组合物包含一种或多种具有通式CHEM的醛低聚物，其中R 1是苯基或取代的苯基，R 2和R 3各自是氢，饱和或不饱和脂族基或芳基，R 4是氢， - （ NH-CH 2 -CH 2 - ）m-NH-CH 2 CH 2 NH 2，其中m为0至5，或三（2-氨基乙基）胺基，X为氧或= NH，并且上述每一个也可为 不会对组合物产生不利影响。 该组合物用于加入腐蚀性酸性水溶液以减少或抑制其对金属表面的腐蚀作用。
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公开(公告)号：EP0927725A3
公开(公告)日：1999-09-22
申请号：EP98310550.3
申请日：1998-12-22
IPC分类号： C08F2/42
CPC分类号： C08F2/40
摘要： The present invention relates to a method of terminating a free-radical initiated emulsion polymerization by utilizing a shortstopping agent that contains a stable nitroxyl free-radical or is capable of forming a stable nitroxyl free radical in situ. Besides more effective stopping of polymerization, the present invention does not contain nitrosamine precursors nor is the shortstop agent easily removed during latex and polymer processing.
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公开(公告)号：EP0927725A2
公开(公告)日：1999-07-07
申请号：EP98310550.3
申请日：1998-12-22
IPC分类号： C08F2/42
CPC分类号： C08F2/40
摘要： The present invention relates to a method of terminating a free-radical initiated emulsion polymerization by utilizing a shortstopping agent that contains a stable nitroxyl free-radical or is capable of forming a stable nitroxyl free radical in situ. Besides more effective stopping of polymerization, the present invention does not contain nitrosamine precursors nor is the shortstop agent easily removed during latex and polymer processing.
摘要翻译： 本发明涉及一种通过使用含有稳定的硝酰自由基或能够原位形成稳定的硝酰自由基的速止剂来终止自由基引发的乳液聚合的方法。 除了更有效地停止聚合反应之外，本发明不含亚硝胺前体，在胶乳和聚合物加工期间也不容易除去速止剂。
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7.发明公开
公开(公告)号：EP0872475A2
公开(公告)日：1998-10-21
申请号：EP98302381.3
申请日：1998-03-27
IPC分类号： C07C253/32
CPC分类号： C07C253/32 , C07C255/08
摘要： The invention comprises a method of inhibiting the formation of foulants such as residues, gums and precipitates, polymeric tars and other highly oxidized carbonaceous tars which can be formed in the process of manufacture and recovery of acrylonitrile. The method comprises adding to the liquid or gaseous phases passing through, or stored in acrylonitrile process equipment, an effective antifouling amount of a dispersant which is stable in the environment within an acrylonitrile process and is neutral to the equipment used for the manufacture of acrylonitrile.
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公开(公告)号：EP0638663B1
公开(公告)日：1998-08-26
申请号：EP94304504.7
申请日：1994-06-21
CPC分类号： C23F11/04 , C09K8/54 , C09K8/74 , Y10S507/933 , Y10S507/934 , Y10S507/939
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公开(公告)号：EP0520761B1
公开(公告)日：1998-04-08
申请号：EP92305791.3
申请日：1992-06-24
发明人： Clewlow, Paul J. , Haslegrave, Anthony J. , Carruthers , Niall , Bourland, Brent I. , Sullivan, Daniel S.
CPC分类号： C09K8/54 , C23F11/144 , Y10S507/939
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10.发明公开
公开(公告)号：EP0824142A2
公开(公告)日：1998-02-18
申请号：EP97306112.0
申请日：1997-08-12
发明人： Lewis, Vincent E. , Patel, Natu R.
摘要： A method of inhibiting the formation of fouling deposits occurring on the surfaces of an alkaline scrubber used to wash acid gases generated during the manufacture of olefins, which deposits are formed during the scrubbing of pyrolytically produced hydrocarbons contaminated with oxygen-containing compounds with a caustic solution having a pH >7, which comprises adding an effective depositing-inhibiting amount of a caustic solution-soluble substituted aromatic amine selected from the group consisting of: 2-aminophenol, 4-aminophenol, 4-aminobenzenesulfonic acid and salts thereof, 4-amino- o -cresol, 3-aminophenol, 2-aminobenzoic acid and salts thereof, 3-aminobenzoic acid and salts thereof, and 4-aminobenzoic acid and salts thereof to the caustic solution. A preferred substituted aromatic amine is the sodium salt of 4-amino- benzenesulfonic acid in aqueous solution.
摘要翻译： 一种抑制在碱性洗涤器表面产生的污垢沉积物的形成方法，该洗涤器用于清洗在制备烯烃期间产生的酸性气体，这些沉积物是在用含氢化合物被苛性碱溶液污染的热解产生的烃时形成的 其pH> 7，其包括加入有效沉积抑制量的选自以下的苛性碱溶液取代的芳族胺：2-氨基苯酚，4-氨基苯酚，4-氨基苯磺酸及其盐，4-氨基 - 对甲酚，3-氨基苯酚，2-氨基苯甲酸及其盐，3-氨基苯甲酸及其盐，和4-氨基苯甲酸及其盐与苛性碱溶液。 优选的取代芳族胺是4-氨基苯磺酸在水溶液中的钠盐。
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