-
公开(公告)号：US4738755A
公开(公告)日：1988-04-19
申请号：US24165
申请日：1987-03-10
申请人： Lloyd Berg , An-I Yeh
发明人： Lloyd Berg , An-I Yeh
CPC分类号： C07C7/08
摘要： m-Xylene is difficult to separate from o-xylene by conventional rectification or distillation because of the close proximity of their boiling points. m-Xylene can be readily separated from o-xylene by using extractive distillation in which the extractive agent is ethyl-2-hydroxybenzoate; methyl benzoate plus benzophenone; methyl benzoate, butyl benzoate and dimethylsulfoxide.
摘要翻译： 由于其沸点的接近程度，常规精馏或蒸馏，间二甲苯难以与邻二甲苯分离。 通过使用萃取剂为乙基-2-羟基苯甲酸酯的萃取蒸馏，可以容易地将间二甲苯与邻二甲苯进行分离; 苯甲酸甲酯加二苯甲酮; 苯甲酸甲酯，苯甲酸丁酯和二甲基亚砜。
-
公开(公告)号：US4735690A
公开(公告)日：1988-04-05
申请号：US860648
申请日：1986-04-28
申请人： Lloyd Berg , An-I Yeh
发明人： Lloyd Berg , An-I Yeh
摘要： Impure formic acid cannot be completely removed from formic acid-water-impurity mixtures by distillation because of the presence of the maximum azeotrope between formic acid and water. Formic acid can be readily removed from mixtures containing it, water and impurities of the ether, ester, ketone or diketone type by using extractive distillation in which the extractive agent is a higher boiling oxygenated, nitrogenous or sulfur containing organic compound or a mixture of these. Examples of effective agents are adiponitrile; sulfolane and salicyclic acid; dimethylformamide, N,N-dimethylacetamide and ethylene glycol ethyl ether acetate.
摘要翻译： 由于在甲酸和水之间存在最大的共沸物，不纯的甲酸不能通过蒸馏从甲酸 - 水 - 杂质混合物中完全除去。 通过采用萃取剂是高沸点含氧化，含氮或含硫有机化合物或其混合物的萃取蒸馏，可以容易地从含有它的混合物，水和醚，酯，酮或二酮类型的杂质中除去甲酸。 。 有效试剂的实例是己二腈; 环丁砜和水杨酸; 二甲基甲酰胺，N，N-二甲基乙酰胺和乙二醇乙醚乙酸酯。
-
3.发明授权Separation of m-xylene from o-xylene by extractive distillation with adiponitrile and mixtures thereof 失效通过用己二腈的萃取蒸馏及其混合物将间二甲苯与邻二甲苯进行分离
公开(公告)号：US4676872A
公开(公告)日：1987-06-30
申请号：US854422
申请日：1986-04-21
申请人： Lloyd Berg , An-I Yeh
发明人： Lloyd Berg , An-I Yeh
CPC分类号： C07C7/08
摘要： m-Xylene is difficult to separate from o-xylene by conventional distillation or rectification because of the close proximity of their boiling points. m-Xylene can be readily separated from o-xylene by using extractive distillation in which the extractive agent is adiponitrile or a mixture of it with certain high boiling organic compounds. Typical examples of effective agents are: adiponitrile; adiponitrile and 1,4-butanediol; adiponitrile, ethylene carbonate and benzyl alcohol.
摘要翻译： 由于其沸点接近，常规蒸馏或精馏，间二甲苯难以与邻二甲苯分离。 通过萃取蒸馏可以将间二甲苯与邻二甲苯分离，其中萃取剂是己二腈或其与某些高沸点有机化合物的混合物。 有效试剂的典型实例是：己二腈; 己二腈和1,4-丁二醇; 己二腈，碳酸亚乙酯和苄醇。
-
公开(公告)号：US4654123A
公开(公告)日：1987-03-31
申请号：US815519
申请日：1986-01-02
申请人： Lloyd Berg , An-I Yeh
发明人： Lloyd Berg , An-I Yeh
CPC分类号： C07C29/84 , Y10S203/14
摘要： Water cannot be completely removed from ethanol by distillation because of the presence of the minimum azeotrope. Ethanol can be readily dehydrated by using extractive distillation in which the water is removed as overhead product and the ethanol and extractive agent as bottoms and subsequently separated by conventional rectification. Typical examples of suitable extractive agents are hexahydrophthalic anhydride; methyl tetrahydrophthalic anhydride and pentanol-1; trimellitic anhydride, ethyl salicylate and resorcinol.
摘要翻译： 由于存在最小的共沸物，水不能通过蒸馏从乙醇中完全除去。 通过使用萃取蒸馏可以容易地将乙醇脱水，其中将水作为塔顶产物除去，乙醇和萃取剂作为塔底馏分，随后通过常规精馏分离。 合适的萃取剂的典型实例是六氢邻苯二甲酸酐; 甲基四氢邻苯二甲酸酐和戊醇-1; 偏苯三酸酐，水杨酸乙酯和间苯二酚。
-
5.发明授权
公开(公告)号：US4592805A
公开(公告)日：1986-06-03
申请号：US681893
申请日：1984-12-14
申请人： Lloyd Berg , An-I Yeh
发明人： Lloyd Berg , An-I Yeh
摘要： n-Propyl acetate cannot be completely removed from n-propyl acetate - n-propanol - water mixtures by distillation because of the presence of the minimum ternary azeotrope. n-Propyl acetate can be readily removed from mixtures containing it, n-propanol and water by using extractive distillation in which the extractive distillation agent is a higher boiling oxygenated, nitrogenous and/or sulfur containing organic compound or a mixture of these. Examples of effective agents are N,N-dimethylacetamide; acetamide and triethylene glycol; acetamide and N,N-dimethylacetamide and triethanolamine.
摘要翻译： 由于存在最小的三元共沸物，乙酸正丙酯不能通过蒸馏从乙酸正丙酯 - 正丙醇 - 水混合物中完全除去。 通过采用萃取蒸馏法萃取蒸馏剂是较高沸点的含氧化合物，含氮和/或含硫的有机化合物或它们的混合物，可以容易地从含有它的混合物，正丙醇和水中除去正丙酸乙酯。 有效试剂的实例是N，N-二甲基乙酰胺; 乙酰胺和三甘醇; 乙酰胺和N，N-二甲基乙酰胺和三乙醇胺。
-
6.发明授权Separation of isopropyl ether from isopropanol and water by extractive distillation 失效通过萃取蒸馏从异丙醇和水中分离异丙醚
公开(公告)号：US4566948A
公开(公告)日：1986-01-28
申请号：US684367
申请日：1984-12-20
申请人： Lloyd Berg , An-I Yeh
发明人： Lloyd Berg , An-I Yeh
CPC分类号： C07C41/42
摘要： Isopropyl ether cannot be completely removed from isopropyl ether-isopropanol-water mixtures by distillation because of the presence of the minimum ternary azeotrope. Isopropyl ether can be readily removed from mixtures containing it, isopropanol and water by using extractive distillation in which the extractive distillation agent is dimethylsulfoxide with or without a mixture of higher boiling oxygenated and/or nitrogenous organic compounds. Typical examples are dimethylsulfoxide; dimethylsulfoxide and ethylene glycol; dimethylsulfoxide, dimethylformamide and 1,4-butanediol.
摘要翻译： 由于存在最小的三元共沸物，异丙醚不能通过蒸馏从异丙醚 - 异丙醇 - 水混合物中完全除去。 异丙醚可以通过使用萃取蒸馏，其中萃取蒸馏剂是具有或不具有较高沸点的氧化和/或含氮有机化合物的混合物的二甲亚砜来容易地从含有它的混合物，异丙醇和水中除去。 典型的例子是二甲亚砜; 二甲基亚砜和乙二醇; 二甲基亚砜，二甲基甲酰胺和1,4-丁二醇。
-
公开(公告)号：US4551207A
公开(公告)日：1985-11-05
申请号：US576545
申请日：1984-02-03
申请人： Lloyd Berg , An-I Yeh
发明人： Lloyd Berg , An-I Yeh
摘要： Isopropyl ether cannot be completely removed from isopropyl ether-acetone mixtures by distillation because of the presence of the minimum binary azeotrope. Isopropyl ether can be readily removed from mixtures containing it and acetone by using extractive distillation in which the extractive distillation agent is a higher boiling oxygenated, nitrogenous and/or sulfur containing compound or a mixture of these. Typical examples of effective agents are: dimethylsulfoxide; sulfolane and propylene glycol; adiponitrile, glycerine and ethylene glycol.
摘要翻译： 由于存在最小的二元共沸物，异丙醚不能通过蒸馏从异丙醚 - 丙酮混合物中完全除去。 异丙醚可以通过萃取蒸馏容易地从含有它和丙酮的混合物中除去，其中萃取蒸馏剂是较高沸点的含氧化合物，含氮和/或含硫化合物或它们的混合物。 有效试剂的典型实例是：二甲基亚砜; 环丁砜和丙二醇; 己二腈，甘油和乙二醇。
-
8.发明授权
公开(公告)号：US4525245A
公开(公告)日：1985-06-25
申请号：US608040
申请日：1984-05-07
申请人： Lloyd Berg , An-I Yeh
发明人： Lloyd Berg , An-I Yeh
摘要： n-Butyl acetate cannot be completely removed from n-butyl acetate - n-butanol - water mixtures by distillation because of the presence of the minimum ternary azeotrope. n-Butyl acetate can be readily removed from mixtures containing it, n-butanol and water by using extractive distillation in which the extractive distillation agent is a higher boiling oxygenated, nitrogenous and/or sulfur containing organic compound or a mixture of these. Typical examples of effective agents are dimethylsulfoxide; dimethylsulfoxide and 1,4-butanediol; dimethylsulfoxide, dimethylformamide and 1,6-hexanediol.
摘要翻译： 由于存在最小的三元共沸物，乙酸正丁酯不能通过蒸馏从乙酸正丁酯 - 正丁醇 - 水混合物中完全除去。 萃取蒸馏是提取沸腾的含氧化合物，含氮和/或含硫有机化合物或它们的混合物的萃取蒸馏，可以容易地从含有它的混合物，正丁醇和水中除去乙酸正丁酯。 有效试剂的典型实例是二甲基亚砜; 二甲基亚砜和1,4-丁二醇; 二甲基亚砜，二甲基甲酰胺和1,6-己二醇。
-
9.发明授权
公开(公告)号：US4718988A
公开(公告)日：1988-01-12
申请号：US844683
申请日：1986-03-27
申请人： Lloyd Berg , An-I Yeh
发明人： Lloyd Berg , An-I Yeh
摘要： 2-Butyl acetate cannot be completely removed from 2-butyl acetate-2-butanol-water mixtures by distillation because of the presence of the minimum ternary azeotrope. 2-butyl acetate can be readily removed from mixtures containing it, 2-butanol and water by using extractive distillation in which the extractive distillation agent is a higher boiling oxygenated, nitrogenous and/or sulfur containing organic compound or a mixture of these. Typical examples of effective agents are N,N-dimethylacetamide; dimethylformamide and ethylene glycol; acetamide, dimethylsulfoxide and ethylene glycol.
摘要翻译： 由于存在最低三元共沸物，乙酸2-丁酯不能通过蒸馏从乙酸丁酯 - 2-丁醇 - 水混合物中完全除去。 采用萃取蒸馏法可以很容易地从含有它的混合物2-丁醇和水中除去乙酸2-丁酯，其中萃取蒸馏剂是较高沸点的含氧化氮，和/或含硫有机化合物或它们的混合物。 有效试剂的典型例子是N，N-二甲基乙酰胺; 二甲基甲酰胺和乙二醇; 乙酰胺，二甲基亚砜和乙二醇。
-
10.发明授权
公开(公告)号：US4693789A
公开(公告)日：1987-09-15
申请号：US836488
申请日：1986-03-05
申请人： Lloyd Berg , An-I Yeh
发明人： Lloyd Berg , An-I Yeh
摘要： Isopropyl acetate cannot be completely removed from isopropyl acetate - isopropanol - water mixtures by distillation because of the presence of the minimum ternary azeotrope. Isopropyl acetate can be readily removed from mixtures containing it, isopropanol and water by using extractive distillation in which the extractive agent is a higher boiling oxygenated or nitrogenous organic compound or a mixture of these. Typical examples of effective agents are diethanolamine; ethanolamine and N-methyl pyrrolidone; triethanolamine and N-methyl pyrrolidone.
摘要翻译： 由于存在最小的三元共沸物，乙酸异丙酯不能通过蒸馏从乙酸异丙酯 - 异丙醇 - 水混合物中完全除去。 通过采用萃取剂是较高沸点的含氧化合物或含氮有机化合物或它们的混合物的萃取蒸馏，可以容易地从含有它的混合物，异丙醇和水中除去乙酸异丙酯。 有效试剂的典型例子是二乙醇胺; 乙醇胺和N-甲基吡咯烷酮; 三乙醇胺和N-甲基吡咯烷酮。
-
-
-
-
-
-
-
-
-
搜索结果
247 条记录 (耗时 0.02 秒)
