Separation of m-xylene from o-xylene by extractive distillation with
esters
    31.
    发明授权
    Separation of m-xylene from o-xylene by extractive distillation with esters 失效
    用酯萃取蒸馏分离间二甲苯与邻二甲苯

    公开(公告)号:US5094725A

    公开(公告)日:1992-03-10

    申请号:US680351

    申请日:1991-04-04

    申请人: Lloyd Berg

    发明人: Lloyd Berg

    IPC分类号: C07C7/08

    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 agent is an aliphatic ester. Typical examples of effective agents are diethyl maleate, diethyl malonate or 2-ethyl hexyl acetate.

    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。 间二甲苯可以通过使用萃取蒸馏容易地从邻二甲苯中分离,其中该试剂是脂族酯。 有效剂的典型实例是马来酸二乙酯,丙二酸二乙酯或乙酸2-乙基己酯。

    Separation of 4-methyl-2-pentanone from acetic acid by extractive
distillation with DMFA
    32.
    发明授权
    Separation of 4-methyl-2-pentanone from acetic acid by extractive distillation with DMFA 失效
    通过DMFA萃取蒸馏从乙酸中分离4-甲基-2-戊酮

    公开(公告)号:US5092965A

    公开(公告)日:1992-03-03

    申请号:US702515

    申请日:1991-05-02

    IPC分类号: C07C45/83 C07C51/44

    CPC分类号: C07C45/83 C07C51/44

    摘要: 4-Methyl-2-pentanone cannot be easily separated from acetic acid by distillation because of the closeness of their boiling points. 4-Methyl-2-phentanone can be readily removed from acetic acid by extractive distillation. Typical effective agents are dimethylformamide (DMFA); DMFA and m-toluic acid; DMFA, p-toluic acid and isobutyl heptyl ketone.

    摘要翻译: 由于沸点接近,4-甲基-2-戊酮不能通过蒸馏从醋酸中分离出来。 通过萃取蒸馏可以容易地从乙酸中除去4-甲基-2-苯基酮。 典型的有效剂是二甲基甲酰胺(DMFA); DMFA和间甲苯甲酸; DMFA,对甲苯甲酸和异丁基庚基酮。

    Separation of tertiary butyl alcohol from water by azeotropic or
extractive distillation
    33.
    发明授权
    Separation of tertiary butyl alcohol from water by azeotropic or extractive distillation 失效
    通过共沸或萃取蒸馏将叔丁醇与水分离

    公开(公告)号:US5084142A

    公开(公告)日:1992-01-28

    申请号:US658504

    申请日:1991-02-21

    申请人: Lloyd Berg Zuyin Yang

    发明人: Lloyd Berg Zuyin Yang

    IPC分类号: C07C29/82 C07C29/84

    CPC分类号: C07C29/82 C07C29/84

    摘要: t-Butyl alcohol cannot be completely separated from water by conventional distillation or rectification because of the minimum boiling azeotrope. t-Butyl alcohol can be readily separated from water by using azeotropic or extractive distillation. Typical examples of effective agents are: by azeotropic distillation, vinyl n-butyl ether and propylene glycol dimethyl ether; by extractive distillation, 1,3-butanediol and triethylene glycol.

    摘要翻译: 由于最低沸点的共沸物,叔丁醇不能通过常规蒸馏或精馏而完全与水分离。 通过使用共沸或萃取蒸馏,可以容易地将叔丁醇与水分离。 有效试剂的典型实例是:通过共沸蒸馏,乙烯基正丁基醚和丙二醇二甲醚; 通过萃取蒸馏,1,3-丁二醇和三甘醇。

    Separation of m-xylene from o-xylene by extractive distillation using
esters
    34.
    发明授权
    Separation of m-xylene from o-xylene by extractive distillation using esters 失效
    使用酯通过萃取蒸馏分离间二甲苯与邻二甲苯

    公开(公告)号:US5019217A

    公开(公告)日:1991-05-28

    申请号:US476583

    申请日:1990-02-07

    IPC分类号: C07C7/08

    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 a higher boiling ester. Typical examples of effective agents are diisononyl adipate, glycerol triacetate and dimethyl phthalate.

    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。 采用萃取剂为较高沸点酯的萃取蒸馏,可以很容易地将间二甲苯与邻二甲苯分离。 有效试剂的典型实例是己二酸二异壬酯,三乙酸甘油酯和邻苯二甲酸二甲酯。

    Removal of sulfur from petroleum coke with lime
    35.
    发明授权
    Removal of sulfur from petroleum coke with lime 失效
    用石灰从石油焦中除去硫

    公开(公告)号:US4981667A

    公开(公告)日:1991-01-01

    申请号:US508422

    申请日:1990-04-13

    IPC分类号: C10L9/10 C10L10/00

    CPC分类号: C10L9/10 C10L10/02

    摘要: The sulfur in petroleum pitches and cokes can be converted to calcium sulfate instead of sulfur dioxide during combustion when calcium oxide or calcium carbonate is added to the molten pitch before burning.

    摘要翻译: 石油沥青和焦炭中的硫在燃烧过程中可以转化为硫酸钙而不是二氧化硫,当在燃烧之前将氧化钙或碳酸钙加入熔融沥青中时。

    Separation of 2-methyl-butanol-1 from pentanol-1 by extractive
distillation
    36.
    发明授权
    Separation of 2-methyl-butanol-1 from pentanol-1 by extractive distillation 失效
    通过萃取蒸馏将2-甲基 - 丁醇-1与戊醇-1分离

    公开(公告)号:US4969977A

    公开(公告)日:1990-11-13

    申请号:US302980

    申请日:1989-01-30

    申请人: Lloyd Berg

    发明人: Lloyd Berg

    IPC分类号: C07C29/84

    CPC分类号: C07C29/84

    摘要: 2-Methyl butanol-1 cannot be completely removed from 2-methyl butanol-1-pentanol-1 mixtures by distillation because of the proximity of their boiling points. 2-methyl butanol-1 can be readily removed from mixtures of these alcohols by using extractive distillation in which the extractive agent is a mixture of aromatic carboxylic acids or aromatic carboxylic esters. Typical examples of effective agents are: benzoic acid, ethyl salicylate and salicylic acid; methyl benzoate, methyl p-hydroxy benzoate and phenyl salicylate.

    摘要翻译: 2-甲基丁醇-1不能通过蒸馏从2-甲基丁醇-1-戊醇-1混合物中完全除去,因为其沸点接近。 2-甲基丁醇-1可以通过萃取蒸馏从这些醇的混合物中容易地除去,其中萃取剂是芳族羧酸或芳族羧酸酯的混合物。 有效试剂的典型例子有:苯甲酸,水杨酸乙酯和水杨酸; 苯甲酸甲酯,对羟基苯甲酸甲酯和水杨酸苯酯。

    Separation of m-diisopropyl benzene from p-diisopropyl benzene by
extractive distillation
    37.
    发明授权
    Separation of m-diisopropyl benzene from p-diisopropyl benzene by extractive distillation 失效
    通过萃取蒸馏从对二异丙基苯中分离出间二异丙基苯

    公开(公告)号:US4904346A

    公开(公告)日:1990-02-27

    申请号:US407861

    申请日:1989-09-15

    申请人: Lloyd Berg

    发明人: Lloyd Berg

    IPC分类号: C07C7/08

    CPC分类号: C07C7/08

    摘要: Meta and para-diisopropyl benzenes cannot be easily separated from each other by distillation because of the closeness of their vapor pressures. m-Diisopropyl benzene can be readily removed from p-diisopropyl benzene by extractive distillation using certain high boiling organic compounds. Effective extractive agents are diphenyl ether, dimethyl adipate, diisononyl adipate, tributyl phosphate and ethylene glycol phenyl ether.

    摘要翻译: 由于它们的蒸气压接近,不能通过蒸馏将元和对二异丙基苯彼此分离。 通过使用某些高沸点有机化合物的萃取蒸馏,可以容易地从对二异丙基苯中除去间二甲基苯。 有效提取剂有二苯醚,己二酸二甲酯,己二酸二异壬酯,磷酸三丁酯和乙二醇苯基醚。

    Separation of m-diisopropyl benzene from p-diisopropyl benzene by
azeotropic distillation with ketones
    38.
    发明授权
    Separation of m-diisopropyl benzene from p-diisopropyl benzene by azeotropic distillation with ketones 失效
    通过与酮共沸蒸馏分离间二异丙基苯与对二异丙基苯

    公开(公告)号:US4877491A

    公开(公告)日:1989-10-31

    申请号:US270200

    申请日:1988-11-14

    申请人: Lloyd Berg

    发明人: Lloyd Berg

    IPC分类号: C07C7/06

    CPC分类号: C07C7/06

    摘要: Meta and para-diisopropylbenzenes cannot be easily separated from each other by distillation because of the closeness of their vapor pressures. m-Diisopropylbenzene can be readily removed from p-diisopropylbenzene by azeotropic distillation using certain ketones. Typical effective azeotropic distillation agents are acetophenone, 2-undecanone and acetonyl acetone.

    摘要翻译: 由于它们的蒸气压接近,不能通过蒸馏将元和对二异丙基苯彼此分离。 可以使用某些酮通过共沸蒸馏,从对二异丙基苯中容易地除去间二异丙基苯。 典型的有效共沸蒸馏剂是苯乙酮,2-十一烷酮和丙酮丙酮。

    Separation of 2-butanol from t-amyl alcohol by extractive distillation
    39.
    发明授权
    Separation of 2-butanol from t-amyl alcohol by extractive distillation 失效
    通过萃取蒸馏从叔戊醇中分离出2-丁醇

    公开(公告)号:US4756803A

    公开(公告)日:1988-07-12

    申请号:US788978

    申请日:1985-10-18

    申请人: Lloyd Berg

    发明人: Lloyd Berg

    IPC分类号: C07C29/84 B01D3/40

    CPC分类号: C07C29/84

    摘要: 2-Butanol cannot be completely removed from 2-butanol - t-amyl alcohol mixtures by distillation because of the proximitry of their boiling points. 2-Butanol can be readily removed from mixtures containing it and t-amyl alcohol by using extractive distillation in which the extractive agent is a higher boiling benzoate. Typical examples are methyl benzoate; methyl benzoate and salicylic acid; methyl benzoate, cinnamic acid and hexahydrophthalic anhydride.

    摘要翻译: 由于其沸点的近似,2-丁醇不能通过蒸馏从2-丁醇 - 叔戊醇混合物中完全除去。 通过采用萃取剂是较高沸点苯甲酸盐的萃取蒸馏,2-丁醇可以容易地从含有它的混合物和叔戊醇中除去。 典型的例子是苯甲酸甲酯; 苯甲酸甲酯和水杨酸; 苯甲酸甲酯,肉桂酸和六氢邻苯二甲酸酐。

    Separation of m-xylene from o-xylene by extractive distillation
    40.
    发明授权
    Separation of m-xylene from o-xylene by extractive distillation 失效
    通过萃取蒸馏分离间二甲苯与邻二甲苯

    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

    IPC分类号: C07C7/08 B01D3/40

    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。