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104 条记录 (耗时 0.014 秒)

    Method for separating halocarbons
    81.
    发明授权
    Method for separating halocarbons 有权
    卤代烃分离方法

    公开(公告)号：US08252965B2

    公开(公告)日：2012-08-28

    申请号：US12540252

    申请日：2009-08-12

    申请人： Daniel C. Merkel ,  Hsueh Sung Tung ,  Konstantin A. Pokrovski

    发明人： Daniel C. Merkel ,  Hsueh Sung Tung ,  Konstantin A. Pokrovski

    IPC分类号： C07C21/00

    CPC分类号： C07C17/392 ,  C07C17/087 ,  C07C17/25 ,  C07C17/38 ,  C07C21/18 ,  C07C19/10

    摘要： The invention provides a method for separating halocarbons. In particular, a method for separating 2-chloro-1,1,1,2-tetrafluoropropane (HCFC-244bb) from 2-chloro-3,3,3-trifluoropropene (HCFO-1233xf) based on differences in melting points of these compounds. More particularly the invention pertains to a method for separating HCFC-244bb from HCFO-1233xf which are useful as intermediates in the production of 2,3,3,3-tetrafluoropropene (HFO-1234yf).

    摘要翻译： 本发明提供一种分离卤代烃的方法。 特别地，基于这些的熔点的差异，从2-氯-3,3,3-三氟丙烯（HCFO-1233xf）中分离出2-氯-1,1,1,2-四氟丙烷（HCFC-244bb）的方法 化合物。 更具体地说，本发明涉及从HCFO-1233xf中分离HCFC-244bb的方法，其可用作生产2,3,3,3-四氟丙烯（HFO-1234yf）中的中间体。

    METHOD FOR SEPARATION OF OLEFIN-ALCOHOL AZEOTROPIC MIXTURE
    83.
    发明申请
    METHOD FOR SEPARATION OF OLEFIN-ALCOHOL AZEOTROPIC MIXTURE 有权
    烯烃 - 醇混合物的分离方法

    公开(公告)号：US20100298595A1

    公开(公告)日：2010-11-25

    申请号：US12864475

    申请日：2009-01-09

    申请人： Yuuki Matsuda ,  Kazuyoshi Ichihara ,  Takeomi Hirasaka ,  Takuya Ichida

    发明人： Yuuki Matsuda ,  Kazuyoshi Ichihara ,  Takeomi Hirasaka ,  Takuya Ichida

    IPC分类号： C07C67/10 ,  C07C29/78 ,  C07C29/80

    CPC分类号： C07C17/392 ,  C07C17/38 ,  C07C29/78 ,  C07C67/11 ,  C07C21/18 ,  C07C31/12 ,  C07C69/653

    摘要： There is provided a method for separating and collecting at least alcohol with a high purity from an azeotropic mixture of olefin and alcohol.The method conducts the following steps: an azeotropic mixture crystallization step of subjecting an azeotropic mixture of alcohol and olefin represented by the formula: RfCH═CH2 [wherein Rf represents a linear perfluoroalkyl group having 1 to 10 carbon atoms] to a crystallization procedure to separate the mixture into an olefin portion having a higher olefin concentration than that of the original azeotropic mixture and an alcohol portion having a higher alcohol concentration than that of the original azeotropic mixture; and an alcohol purification step of subjecting the separated alcohol portion to either a crystallization procedure or a distillation procedure to separate the alcohol portion into a low-alcohol portion having a lower alcohol concentration than that of the original alcohol portion and a high-alcohol portion having a higher alcohol concentration than that of the original alcohol portion, and thereby collecting alcohol as the high-alcohol portion.

    摘要翻译： 提供了从烯烃和醇的共沸混合物中分离和收集至少具有高纯度的醇的方法。 该方法进行以下步骤：共沸混合物结晶步骤，其对由式R f CH = CH 2 [其中R f表示具有1至10个碳原子的直链全氟烷基]表示的醇和烯烃共沸混合物进行结晶步骤以分离 该混合物成为具有比原始共沸混合物更高的烯烃浓度的烯烃部分和具有比原始共沸混合物的醇浓度高的醇部分; 以及醇分离步骤，使分离的醇部分进行结晶过程或蒸馏步骤，以将醇部分分离成具有比原始醇部分低的醇浓度的低醇部分，以及具有 比原始醇部分高的醇浓度，从而收集作为高醇部分的醇。

    Method for producing 1,4-bis (dichloromethyl) tetrafluorobenzene
    84.
    发明授权
    Method for producing 1,4-bis (dichloromethyl) tetrafluorobenzene 有权
    1,4-二（二氯甲基）四氟苯的制备方法

    公开(公告)号：US07544847B1

    公开(公告)日：2009-06-09

    申请号：US12285645

    申请日：2008-10-10

    申请人： Chan-Yuan Ho ,  Tsair-Feng Lin ,  Chun-Hsu Lin ,  Shieh-Jun Wang

    发明人： Chan-Yuan Ho ,  Tsair-Feng Lin ,  Chun-Hsu Lin ,  Shieh-Jun Wang

    IPC分类号： C07C17/00

    CPC分类号： C07C17/38 ,  C07C17/18 ,  C07C17/392 ,  C07C25/13

    摘要： A method for producing 1,4-bis(dichloromethyl)tetrafluorobenzene is disclosed, which is achieved by reacting tetrafluoroterephthaldehyde, SOCl2 and organic solvents. In the synthesis of 1,4-bis(dichloromethyl)-tetrafluorobenzene by adding formamides as catalyst, there are remarkable advantages which include shortening the reaction time; simplifying the synthesizing steps and raising the yield of the product.

    摘要翻译： 公开了生产1,4-双（二氯甲基）四氟苯的方法，其通过使四氟对苯二甲醛，SOCl 2和有机溶剂反应来实现。 通过加入甲酰胺作为催化剂合成1,4-双（二氯甲基） - 四氟苯，有明显的优点，包括缩短反应时间; 简化合成步骤并提高产品的产率。

    Process for isolating M-dichlorobenzene from mixtures of dichlorobenzene isomers
    86.
    发明授权
    Process for isolating M-dichlorobenzene from mixtures of dichlorobenzene isomers 失效
    从二氯苯异构体的混合物中分离M-二氯苯的方法

    公开(公告)号：US5436377A

    公开(公告)日：1995-07-25

    申请号：US300614

    申请日：1994-09-02

    申请人： Michael Pies ,  Kai Rohlk ,  Helmut Lahr ,  Helmut Fiege

    发明人： Michael Pies ,  Kai Rohlk ,  Helmut Lahr ,  Helmut Fiege

    IPC分类号： C07C17/392 ,  C07C25/08

    CPC分类号： C07C17/392

    摘要： In a particularly advantageous process for isolating m-dichlorobenzene from mixtures of dichlorobenzene isomers by crystallization as eutectic crystals using a processing aid, the processing aid used is a compound of the formula (I) ##STR1## in which R.sup.1 to R.sup.6 are, independently of one another, hydrogen, halogen, C.sub.1 -C.sub.4 -alkyl, hydroxyl, NH.sub.2 or R--CO-- having R=C.sub.1 -C.sub.4 -alkyl,with 1-bromo-4-chlorobenzene and 1,4-dibromobenzene being excepted.

    摘要翻译： 在使用加工助剂通过结晶作为共晶晶体从二氯苯异构体的混合物中分离间二氯苯的特别有利的方法中，所用的加工助剂是式（I）化合物，其中R 1至R 6为 独立地是具有R = C 1 -C 4 - 烷基的氢，卤素，C 1 -C 4 - 烷基，羟基，NH 2或R-CO-，除了1-溴-4-氯苯和1,4-二溴苯外。

    Process for the recovery of haloalkanes
    87.
    发明授权
    Process for the recovery of haloalkanes 失效
    HALOALKANES的恢复过程

    公开(公告)号：US3755475A

    公开(公告)日：1973-08-28

    申请号：US3755475D

    申请日：1971-02-25

    申请人： FUHRMANN R ,  PISANCHYN J ,  KOFF F

    发明人： FUHRMANN R ,  PISANCHYN J ,  KOFF F

    IPC分类号： C07C7/14 ,  C07C17/38 ,  C07C17/392

    CPC分类号： C07C17/392 ,  C07C7/14 ,  C07C17/38

    摘要： A PROCESS FOR THE SEPARATION OF HALOALKANES FROM ALKANES IN A MIXTURE CONTAINING THE SAME WHEREBY THE MIXTURE IS DISSOLVED IN A KETONE SOLVENT, THE TEMPERATURE LOWERED BELOW THE SOLIDIFICATION TEMPERATURE OF THE ALKANES, AND SEPARATION OF TE LIQUID AND SOLID PHASES EFFECTED. THE LIQUID PHASE, ENRICHED IN HALOALKANES, IS TREATED TO REMOVE THE SOLVENT WHILE THE SOLID PHASE, ENRICHED IN ALKANES, MAY BE WARNED AND RECYCLED. THE PROCESS IS PARTICULARLY APPLICABLE TO MIXTURES DERIVED FROM THE FREE RADICAL HALOGENATION OF ALKANES TO PROVIDE A PRODUCT STREAM CONTAINING A HIGH PROPORTION OF HALOALKANES USEFUL IN THE PREPARATION OF ALKYLBENZENES, ALKYLPHENOLS AND OLEFINS.