Gas phase process for the epoxidation of non-allylic olefins
    2.
    发明授权
    Gas phase process for the epoxidation of non-allylic olefins 失效
    用于非烯丙烯烯烃环氧化的气相方法

    公开(公告)号:US06172245B2

    公开(公告)日:2001-01-09

    申请号:US09465100

    申请日:1999-12-16

    IPC分类号: C07D30110

    CPC分类号: C07D303/04 C07D301/10

    摘要: Disclosed herein is an improved gas phase process for the selective epoxidation of non-allylic olefins wherein the epoxidation is carried out in the presence of one or more volatile, nitrogen-containing, basic compounds. The presence of a nitrogen-containing basic compound in the olefin-containing reaction gas or vapor suppresses the formation of an organic resinous material which coats the catalyst, thereby decreasing catalyst activity and life and also increases substantially the activity of the epoxidation catalyst. The disclosed process is particularly useful for the continuous manufacture of 3,4-epoxy-1-butene from 1,3-butadiene.

    摘要翻译: 本文公开了用于非烯丙烯选择性环氧化的改进的气相方法,其中环氧化在一种或多种挥发性含氮碱性化合物的存在下进行。 含烯烃反应气体或蒸气中含氮碱性化合物的存在抑制了涂覆催化剂的有机树脂材料的形成,从而降低催化剂活性和寿命,并且还显着提高了环氧化催化剂的活性。 所公开的方法对于从1,3-丁二烯连续制备3,4-环氧-1-丁烯是特别有用的。

    Use of fluorinated hydrocarbons as reaction media for selective
epoxidation of olefins
    3.
    发明授权
    Use of fluorinated hydrocarbons as reaction media for selective epoxidation of olefins 失效
    使用氟化烃作为烯烃选择性环氧化反应介质

    公开(公告)号:US6011163A

    公开(公告)日:2000-01-04

    申请号:US315107

    申请日:1999-05-20

    IPC分类号: C07D301/10 C07D303/04

    CPC分类号: C07D301/10 C07D303/04

    摘要: The present invention is directed to a process for the selective epoxidation of non-allylic olefins. The process includes the step of contacting a gas mixture comprising a non-allylic olefin, oxygen, and a fluorinated hydrocarbon with a silver epoxidation catalyst at conditions effective to epoxidize the non-allylic olefin. The fluorinated hydrocarbon has a C--F bond dissociation energy of 110 kcal/mole or greater, and sufficiently non-acidic C--H bonds, if present, so as to avoid abstraction of HF from the fluorinated hydrocarbon under reaction conditions.

    摘要翻译: 本发明涉及一种选择性环氧化非烯丙烯烯烃的方法。 该方法包括使包含非烯丙基烯烃,氧和氟化烃的气体混合物与银环氧化催化剂在有效环氧化非烯丙基烯烃的条件下接触的步骤。 氟化烃具有110kcal /摩尔或更大的C-F键离解能和足够非酸性的C-H键(如果存在),以避免HF在反应条件下从氟化烃中抽出。

    Gas phase process for the epoxidation of non-allylic olefins
    4.
    发明授权
    Gas phase process for the epoxidation of non-allylic olefins 失效
    用于非烯丙烯烯烃环氧化的气相方法

    公开(公告)号:US5945550A

    公开(公告)日:1999-08-31

    申请号:US122027

    申请日:1998-07-24

    CPC分类号: C07D301/10

    摘要: This invention provides an improved gas phase feed process using heterogeneous catalysis for the selective epoxidation of non-allylic olefins wherein the epoxidation is carried out in the presence of branched-chain alkane or cyclic aliphatic hydrocarbons with high autoignition temperatures and high Research Octane Numbers. The hydrocarbons useful in the present invention possess higher heat capacities as compared to other non-oxidizable materials, e.g., nitrogen, argon, helium, and other straight-chain hydrocarbons, e.g., methane, ethane, and n-butane, as well as smaller flammability (cool flame and explosive) regions than the above-stated hydrocarbons typically used as diluents or ballast gases in olefin epoxidations. The process is particularly useful for the continuous preparation of 3,4-epoxy-1-butene from 1,3-butadiene.

    摘要翻译: 本发明提供了使用非均相催化用于非烯丙烯选择性环氧化的改进的气相进料方法,其中环氧化在具有高自燃温度和高研究辛烷值的支链烷烃或环脂族烃存在下进行。 与其它不可氧化的材料(例如氮气,氩气,氦气和其它直链烃,例如甲烷,乙烷和正丁烷)以及较小的碳氢化合物相比,本发明中有用的烃具有更高的热容量。 可燃性(冷却火焰和爆炸性)区域比通常用作烯烃环氧化物中的稀释剂或压载气体的上述烃类。 该方法特别适用于从1,3-丁二烯连续制备3,4-环氧-1-丁烯。

    PROCESS FOR REDUCING EMISSIONS OF VOLATILE ORGANIC COMPOUNDS FROM THE KETONIZATION OF CARBOXYLIC ACIDS
    6.
    发明申请
    PROCESS FOR REDUCING EMISSIONS OF VOLATILE ORGANIC COMPOUNDS FROM THE KETONIZATION OF CARBOXYLIC ACIDS 有权
    减少挥发性有机化合物从羧酸的酮化反应的方法

    公开(公告)号:US20130310608A1

    公开(公告)日:2013-11-21

    申请号:US13474837

    申请日:2012-05-18

    IPC分类号: C07C45/41 C07C49/08

    CPC分类号: C07C45/48 C07C49/08

    摘要: Disclosed is a process for reducing the emission of volatile organic compounds that are produced during the ketonization of carboxylic acids to ketones. The ketonization of carboxylic acids produces a gaseous by-product stream containing carbon dioxide and volatile organic compounds. This gaseous by-product stream can be fed to a direct-fired furnace used to heat the ketonization reaction feed streams where the volatile organic compounds are destroyed by combustion in the furnace. The carbon dioxide stream further acts as a diluent for the fuel to the furnace.

    摘要翻译: 公开了一种减少在将羧酸酮化成酮时产生的挥发性有机化合物的排放的方法。 羧酸的酮化产生含有二氧化碳和挥发性有机化合物的气态副产物流。 这种气态副产物流可以进料到用于加热酮化反应进料流的直接燃烧炉,其中挥发性有机化合物通过在炉中燃烧而被破坏。 二氧化碳流还充当用于燃料的炉的稀释剂。

    PROCESS FOR THE SEPARATION AND PURIFICATION OF A MIXED DIOL STREAM
    8.
    发明申请
    PROCESS FOR THE SEPARATION AND PURIFICATION OF A MIXED DIOL STREAM 有权
    混合二醇流的分离和纯化方法

    公开(公告)号:US20120184783A1

    公开(公告)日:2012-07-19

    申请号:US13431308

    申请日:2012-03-27

    IPC分类号: C07C29/86

    摘要: Disclosed is a process for the purification of a mixed diol stream. The mixed diol stream comprising two-, three-, and four-carbon diols is separated into component diols by extraction with a hydrophobic solvent mixture. The diols recovered in the extractant may be removed from the extractant stream by back extraction with water or by distillation with an azeotrope-forming agent present, preferably an azeotroping agent already present in the extractant mixture.

    摘要翻译: 公开了一种纯化混合二醇流的方法。 包含二,三和四碳二醇的混合二醇料流通过用疏水溶剂混合物萃取分离成组分二醇。 在萃取剂中回收的二醇可以通过用水反萃取或用存在的共沸物形成剂,优选已经存在于萃取剂混合物中的共沸剂进行蒸馏,从萃取剂流中除去。