-
-
162.发明授权
公开(公告)号：EP0538189B1
公开(公告)日：1996-01-10
申请号：EP92810758.0
申请日：1992-10-06
申请人： CIBA-GEIGY AG
IPC分类号： C07C69/732 , C07C67/03
CPC分类号： C07C67/03 , C07C69/732
-
-
164.发明公开Preparation of 2,2,4-trimethyl-1,3-pentanediol dibenzoate and di(alkyl-substituted) benzoates 失效Herstellung von 2,2,4-三甲基-1,3-戊二醇二苯并en烷和烷基二苯并二苯并二氮杂。
公开(公告)号：EP0673916A1
公开(公告)日：1995-09-27
申请号：EP95201828.1
申请日：1990-08-31
发明人： Dibella, Eugene P.
摘要： A process for the preparation of 2,2,4-trimethyl-1,3-pentanediol dibenzoate or di(alkyl-substituted) benzoates by transesterification of 2,2,4-trimethyl-1,3-pentanediol or esters of 2,2,4-trimethyl-1,3-pentanediol with esters of benzoic acid or alkyl-substituted benzoic acids while removing volatile alcohol or ester by-product, comprising transesterifying 2,2,4-trimethyl-1,3-pentanediol or an ester of 2,2,4-trimethyl-1,3-pentanediol and one or more mono-carboxylic acids having from 1 to 4 carbon atoms, or mixtures thereof, with an ester having the formula
wherein R=a C₁-C₄ alkyl, alkenyl or alkynyl group and R¹, R¹¹, R¹¹¹, and R¹¹¹¹ are any combination of H and alkyl groups having 1 to 4 carbon atoms, in the presence of a catalytic amount of one or more basic compounds selected from the group consisting of the hydroxides, alkoxides, glycolates, amides, hydrides, and other comparably strongly basic anionic species of the alkali and alkaline earth (excluding magnesium) metals, and quaternary ammonium hydroxides and alkoxides, whereby the diester is obtained in high yield. Mono- and di-esters of 2,2,4-trimethyl-1,3-pentanediol and benzoic acids are useful plasticizers for vinyl chloride polymers, and other polymers, particularly for imparting improved stain resistance to plasticized compositions.摘要翻译： 通过2,2,4-三甲基-1,3-戊二醇或2,2,4-三甲基-1,3-戊二醇的酯的酯交换制备2,2,4-三甲基-1,3-戊二醇二苯甲酸酯或二（烷基取代的）苯甲酸酯的方法 ，4-三甲基-1,3-戊二醇与苯甲酸或烷基取代的苯甲酸酯，同时除去挥发性醇或酯副产物，包括将2,2,4-三甲基-1,3-戊二醇或 2,2,4-三甲基-1,3-戊二醇和一种或多种具有1至4个碳原子的一元羧酸或其混合物与具有式CHEM的酯，其中R = C1-C4烷基 ，烯基或炔基，R 1，R 1，R 1，R 1，R 1，＆lt; 1＆gt; 1是H和 存在催化量的一种或多种选自氢氧化物，醇盐，乙醇酸盐，酰胺，氢化物和碱的其它相当强碱性的碱性化合物的碱性化合物的存在下，具有1至4个碳原子的烷基，以及 碱土 铯）金属和季铵氢氧化物和醇盐，从而以高产率获得二酯。 2,2,4-三甲基-1,3-戊二醇和苯甲酸的单酯和二酯是用于氯乙烯聚合物和其它聚合物的增塑剂，特别是用于赋予增塑组合物改善的耐污染性。
-
165.发明授权Production of terephthalate esters by degradative transesterification of scrap or virgin terephthalate polyesters 失效通过耗尽老或Neuterephthalaten的酯交换反应生产对苯二甲酸酯。
公开(公告)号：EP0388197B1
公开(公告)日：1995-06-21
申请号：EP90302773.8
申请日：1990-03-15
发明人： Dupont, Louis , Gupta, Ved P.
CPC分类号： C07C67/48 , C07C67/03 , C08J11/24 , C08J2367/02 , Y02W30/706 , C07C69/82
-
公开(公告)号：EP0641366A4
公开(公告)日：1995-05-31
申请号：EP93911683
申请日：1993-05-04
申请人： PETWEST PTY LTD
发明人： WEST SIMON MICHAEL
CPC分类号： C08J11/06 , C07C67/03 , C08J11/24 , C08J2367/02 , Y02W30/701 , Y02W30/706 , C07C69/82
摘要： A process for removing contaminants from PET components by depolymerising poly ethylene terephthalate ('PET') comprising transesterifying material containing PET by reacting ethanediol having a temperature at or about the boiling point of ethanediol with the material for a predetermined period of time to form a solution containing soluble short chain PET polymers and/or bis (hydroxy ethyl) terephthalate ester ('BHT'); recovering short chain PET polymers and/or BHT and ethanediol; and hydrolysing the recovered short chain PET polymers and/or BHT at elevated pressure and temperature for a predetermined period of time to form an ethanediol solution and crystals of terephthalic acid.
-
公开(公告)号：EP0646567A2
公开(公告)日：1995-04-05
申请号：EP94850135.8
申请日：1994-08-12
发明人： Trapasso, Louis E. , Padegimas, Stanley J. , Epstein, Peter F. , Hung, Paul Ling Kong , Mukhopadhyay, Purnendu , Meisel, Philip L.
摘要： Esters of monocarboxylic acids are transesterified with 1,2- and 1,3-polyols by reaction in the presence of a catalytically effective amount of a dialkyltin oxide blended with an excess of dialkyltin dichloride, so that a polyol ester of the monocarboxylic acid is formed. A transesterification reaction of alcohols and polyols with methyl or ethyl mono- or polycarboxylic acid esters utilizing a dimethyltin catalyst is also disclosed, in which the alcohol or polyol carboxylic acid ester formed is essentially free of the organotin catalyst. Carboxylic acid esters produced by the described methods, as well as carboxylic acid esters that are free of organotin catalysts are also disclosed.
摘要翻译： 通过在催化有效量的二氯化锡与过量的二烷基锡混合的催化有效量的二烷基锡氧化物的存在下反应，用1,2-和1,3-多元醇酯交换一元羧酸的酯，从而形成一元羧酸的多元醇酯 。 还公开了醇和多元醇与使用二甲基锡催化剂的甲基或乙基单或多元羧酸酯的酯交换反应，其中所形成的醇或多元醇羧酸酯基本上不含有机锡催化剂。 还公开了通过所述方法制备的羧酸酯，以及不含有机锡催化剂的羧酸酯。
-
公开(公告)号：EP0629605A3
公开(公告)日：1995-03-15
申请号：EP94304244.0
申请日：1994-06-13
申请人： TEIJIN LIMITED
发明人： Kuninobu, Yukio , Sumitani, Koji , Sato, Kazuhiro , Shono, Hisasi
摘要： A method for recovering dimethyl naphthalene-2,6-dicarboxylate (DMN) from a mixture of dimethyl naphthalene-2,6-dicarboxylate (DMN) and dimethyl terephthalate (DMT), which comprises recrystallizing said mixture in a mixed medium of ethylene glycol and methanol, said mixed medium containing 10 to 60 % by weight of ethylene glycol, and separating precipitated dimethyl naphthalene-2,6-dicarboxylate (DMN).
According to this invention, DMN can be recovered with high yield from a mixture of DMN and DMT which is obtained from depolymerization of a mixed polymer of polyethylene-2,6-naphthalenedicarboxylate and polyethylene terephthalate.-
公开(公告)号：EP0623581A3
公开(公告)日：1995-01-25
申请号：EP94201235.2
申请日：1994-05-04
摘要： The invention is directed to a process for the transesterification of carboxylic acid esters, in which process a catalyst is used which is substantially insoluble in the reaction mixture under reaction conditions, said catalyst comprising at least one silicate of the Group IVB elements of the Periodic Table as the active component.
摘要翻译： 本发明涉及羧酸酯的酯交换方法，其中使用的催化剂在反应条件下基本上不溶于反应混合物，所述催化剂包含至少一种周期表第IVB族元素的硅酸盐 作为活动组件。
-
170.发明公开Method for recovering dimethyl naphthalene-2,6-dicarboxylate 失效Verfahren zur Gewinnung von二甲基萘-2,6-二羧酸酯。
公开(公告)号：EP0629605A2
公开(公告)日：1994-12-21
申请号：EP94304244.0
申请日：1994-06-13
申请人： TEIJIN LIMITED
发明人： Kuninobu, Yukio , Sumitani, Koji , Sato, Kazuhiro , Shono, Hisasi
摘要： A method for recovering dimethyl naphthalene-2,6-dicarboxylate (DMN) from a mixture of dimethyl naphthalene-2,6-dicarboxylate (DMN) and dimethyl terephthalate (DMT), which comprises recrystallizing said mixture in a mixed medium of ethylene glycol and methanol, said mixed medium containing 10 to 60 % by weight of ethylene glycol, and separating precipitated dimethyl naphthalene-2,6-dicarboxylate (DMN).
According to this invention, DMN can be recovered with high yield from a mixture of DMN and DMT which is obtained from depolymerization of a mixed polymer of polyethylene-2,6-naphthalenedicarboxylate and polyethylene terephthalate.摘要翻译： 从2,6-萘二甲酸二甲酯（DMN）和对苯二甲酸二甲酯（DMT）的混合物中回收2,6-萘二甲酸二甲酯（DMN）的方法，其中包括在乙二醇和 甲醇，所述混合介质含有10至60重量％的乙二醇，并分离沉淀的2,6-二甲基萘-2,6-二羧酸二甲酯（DMN）。 根据本发明，可以从由聚2,6-萘二甲酸乙二醇酯和聚对苯二甲酸乙二醇酯的混合聚合物的解聚获得的DMN和DMT的混合物中以高产率回收DMN。
-
-
-
-
-
-
-
-
-
搜索结果
1126 条记录 (耗时 0.017 秒)
