• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a process of converting ethylbenzene to styrene by catalytic dehydrogenation at temperatures of about 600 DEG C. in the presence of water vapor in a tubular reactor. The heat required for the dehydrogenation is fed to the tubular reactor with a molten salt bath. The dehydrogenation is effected isothermally and in a single stage under atmospheric pressure or preferable under a subatmospheric pressure with a water vapor-ethylbenzene ratio of 1.2 to 1.5 kg of water vapor per kg of ethylbenzene. The temperature of the ethylbenzene-water-vapor mixture entering the tubular reactor is maintained 50 DEG to 100 DEG C. below the temperature of the molten salt bath.
    公开号:SU1036245A3
    申请号:SU802893553
    申请日:1980-03-05
    公开日:1983-08-15
    发明作者:Меллер Фридрих-Вильхельм；Бухольд Хеннинг；Кляйн Хельмут；Гаркиш Отто-Людвиг；Гютльхубер Фридрих；Лабер Вальтер
    申请人:Металлгезельшафт Аг (Фирма)；
    IPC主号:
    专利说明:

    with
    05
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    权利要求:
    Claims (2)
    [1]
    1 "METHOD FOR PRODUCING STYROL by isothermal catalytic dehydrogenation of ethylbenzene at a temperature of about 600 ° C and atmospheric or reduced pressure in the presence of water vapor at a weight ratio of water vapor: ethylbenzene
    1.2-1.5: 1 in a tubular reactor, characterized in that, in order to increase the yield of the target product and the selectivity of the process, heating the tubular reactor is carried out with a molten salt consisting of a mixture of sodium, potassium and lithium carbonates, and the process is carried out when the temperature difference of the molten salt and the introduced mixture of ethylbenzene with water vapor 50-100 ° C.
    [2]
    2. The method according to π. 1, they are distinguished by the fact that the process is carried out at a temperature difference between the salt melt and dehydrogenation less than 20 ° С.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1036245A3|1983-08-15|Process for producing styrene
    US4107220A|1978-08-15|Gas phase nitration of chlorobenzene
    BE881765A|1980-08-18|PROCESS FOR ISOLATING METHYLTERTIOBUTYLETHER FROM METHANOL REACTION PRODUCTS WITH A CUT OF C4 HYDROCARBONS CONTAINING ISOBUTENE
    JPS55145628A|1980-11-13|Fluorination
    ES8104339A1|1981-04-16|A process for the preparation of brominated products of polystyrene.
    US2564388A|1951-08-14|Isomerization of xylenes
    US3654365A|1972-04-04|Process for the preparation of para-aminophenol
    JPS5636451A|1981-04-09|Production of indole
    US2389950A|1945-11-27|Production of di-carboxylic acids
    US2547916A|1951-04-03|Multistage continuous reaction process for the production of vinyl acetate
    JPS51136625A|1976-11-26|Process for preparation of titanium double compound
    US4255602A|1981-03-10|Stilbene formation by means of toluene dehydrocoupling using a cobalt-lanthanide catalyst
    IE44659L|1977-09-22|Method of preparing 2, 6-ditert. butylphenol
    US4141920A|1979-02-27|Process for the preparation of trimethylsulfoxonium bromide
    IE41925L|1976-05-02|Preparation of halogenoanthraquinones
    US2677688A|1954-05-04|Method for producing vinyl pyridines
    US2748161A|1956-05-29|Method of forming phthalaldehydic acid from pentachloroxylene
    SU759498A1|1980-08-30|Method of preparing styrene or its alkyl derivatives
    US4226810A|1980-10-07|Splitting up pyran rings
    SU437733A1|1974-07-30|The method of producing styrene
    JPS56108791A|1981-08-28|Continuous preparation of benzylidenesorbitol compound
    US3020280A|1962-02-06|Quinoline synthesis
    US4388251A|1983-06-14|Method for preparing 2-chlorobenzoyl chloride
    US2646443A|1953-07-21|Method of producing 1, 4-dicyano-2-butene
    SU1616885A1|1990-12-30|Method of producing styrene
    同族专利:
    公开号 | 公开日
    US4287375A|1981-09-01|
    IT1174666B|1987-07-01|
    DE2909763A1|1980-09-18|
    GB2044287A|1980-10-15|
    NL8001290A|1980-09-16|
    FR2451355B1|1985-02-01|
    IT8020430D0|1980-03-07|
    JPS55124723A|1980-09-26|
    FR2451355A1|1980-10-10|
    DE2909763C2|1982-09-09|
    GB2044287B|1983-01-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2374826A|1942-03-26|1945-05-01|Universal Oil Prod Co|Conversion process|
    DE886908C|1951-09-09|1953-08-17|Chemische Werke Huels Ges Mit|Process for the catalytic dehydrogenation of hydrocarbons|
    FR1131654A|1954-11-12|1957-02-26|Huels Chemische Werke Ag|Process for the catalytic dehydrogenation of hydrocarbons|
    US3100807A|1960-02-18|1963-08-13|Monsanto Chemicals|Dehydrogenation of alkylated aromatic hydrocarbons|
    US3158564A|1961-01-26|1964-11-24|Texaco Inc|Process for hydrocarbon conversion|
    US3288871A|1963-08-07|1966-11-29|Dow Chemical Co|Catalytic dehydrogenation of hydrocarbons|
    DE1618622A1|1967-04-01|1971-01-14|Liem Tiauw Hien|Process and device for the splitting or dehydrogenation of hydrocarbons|
    US3702346A|1971-06-30|1972-11-07|Universal Oil Prod Co|Conversion of ethylbenzene to styrene|
    US3807963A|1972-03-09|1974-04-30|J Smith|Reaction apparatus|
    US4049579A|1975-07-07|1977-09-20|Petro-Tex Chemical Corporation|Dehydrogenation catalyst|
    GB1584101A|1977-05-06|1981-02-04|Ici Ltd|Heat-exchange process using molten salt mixture|US4400569A|1981-10-27|1983-08-23|Cosden Technology, Inc.|Method and apparatus for dehydrogenation of alkylaromatic compounds to produce vinylaromatic monomers|
    JPS6241366B2|1982-06-03|1987-09-02|Hitachi Cable|
    DE3319024A1|1983-05-26|1984-11-29|Deggendorfer Werft Und Eisenbau Gmbh, 8360 Deggendorf|METHOD FOR PRODUCING STYRENE BY DEHYDRATING AETHYLBENZENE|
    US4769506A|1985-03-21|1988-09-06|The Dow Chemical Company|Method for dehydrogenating a hydrocarbon, an apparatus and method for conducting chemical reactions therein|
    US5254788A|1991-09-10|1993-10-19|Stone And Webster Engineering Corporation|Process for the production of olefins from light paraffins|
    US5461179A|1993-07-07|1995-10-24|Raytheon Engineers & Constructors, Inc.|Regeneration and stabilization of dehydrogenation catalysts|
    US5739071A|1993-07-07|1998-04-14|Raytheon Engineers & Constructors, Inc.|Method and apparatus for regeneratinig and stabilizing dehydrogenation catalysts|
    EP0841317B1|1996-11-08|2002-01-09|Fina Technology, Inc.|Process for dehydrogenation of ethylbenzene to styrene|
    US6781024B2|2000-11-22|2004-08-24|Fina Technology, Inc.|Dehydrogenation process|
    US6380449B1|2000-11-22|2002-04-30|Fina Technology, Inc.|Dehydrogenation process|
    US20050085677A1|2003-10-15|2005-04-21|Fina Technology, Inc.|Method for improved production of cyclohexenyl and alkenyl aromatic compounds|
    US7169960B2|2004-12-22|2007-01-30|Fina Technology, Inc.|Dehydrogenation process|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE2909763A|DE2909763C2|1979-03-13|1979-03-13|Process for the catalytic, one-step, isothermal dehydrogenation of ethylbenzene to styrene|
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