• 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:
    An improved process for the preparation of 2-pyrrolidone by the liquid phase hydrogenation of succinonitrile in the presence of a hydrogenation catalyst and ammonia, whereafter the resulting hydrogenation product is hydrolyzed with water. A hydrogenation catalyst in the form of a fixed bed is used, and a liquid phase of succinonitrile and liquid ammonia is passed over the catalyst at a temperature of between 50 DEG and 130 DEG C.
    公开号:SU942591A3
    申请号:SU792712904
    申请日:1979-01-19
    公开日:1982-07-07
    发明作者:Йохан Николас Мейер Петер；Герард Мариа Ньивкамп Йоханнес
    申请人:Стамикарбон Б.В. (Фирма)；
    IPC主号:
    专利说明:

    one
    The invention relates to an improved method of preparation, 2-pyrrolidone, which can be used in the preparation of polyamides, such as nylon-A, and s as the basis for the preparation of (poly) -M-vinylpyrrolidine.
    A method is known for producing 2-pyrrolidone by hydrogenating nitric acid succinic acid in the presence of ammonia using a catalyst in the liquid phase in an inert solvent such as pyridine, at a partial hydrogen pressure of 1-50 atm and a temperature of 80,200 ° C, followed by hydrolysis of the obtained at the same time connections with water when heating to l.
    The aim of the invention is to simplify the process.
    This goal is achieved by the fact that hydrogenation is carried out on a fixed catalyst bed, and a solution of nitrile succinic acid in liquid ammonia is passed over the catalyst at 50-130 ° C. 25
    The catalyst used contains nickel supported on a fixed support, for example coal, alumina or silica.
    According to the proposed method, it is not necessary to filter the catalyst after hydrogenation and, therefore, it can be used repeatedly.
    The ratio between nitric acid succinic acid and ammonia in the liquid phase can be changed, for example, from 5 to 250 g of nitrile succinic acid for every 100 g of liquid phase containing ammonia.
    The partial pressure of hydrogen can also be varied, for example, from 100 to 3500 kPa (1 atm 98.0665 kPa). It is preferable to use hydrogen at a partial pressure of 5,000 to 20,000 kPa.
     Hydrogenation is carried out at, hydrolysis - at.
    Hydrogenation of the proposed method can be carried out in the so-called irrigated reactor, in this case
    权利要求:
    Claims (1)
    [1]
    The claims .35
    A method for producing 2-pyrrolidone by hydrogenation of succinic acid nitrile in the presence of ammonia in the liquid phase using a catalyst by heating, followed by hydrolysis of the resulting compound with water at elevated temperature, characterized in that, in order to simplify the process, hydrogenation is carried out on a fixed catalyst bed, a solution of nitrile. succinic acid in liquid ammonia is passed over the catalyst at 50-130 ° C.
    类似技术:
    公开号 | 公开日 | 专利标题
    US4356124A|1982-10-26|Process for the production of pyrrolidones
    US3448118A|1969-06-03|Preparation of n-substituted alpha-pyrrolidones
    SU942591A3|1982-07-07|Process for producing 2-pyrrolidone
    US2817646A|1957-12-24|Process for preparing lactams and amides
    US3644402A|1972-02-22|Process for producing alpha-pyrrolidone
    US4263175A|1981-04-21|Catalyst for the production of pyrrolidone
    CA2003352A1|1990-06-24|Preparation of caprolactam
    US3884936A|1975-05-20|Preparation of 2-pyrrolidone
    US4123438A|1978-10-31|Process for preparing 2-pyrrolidones
    US4152331A|1979-05-01|Process for the preparation of n-substituted 2-pyrrolidones
    US3867405A|1975-02-18|Process for preparing N-|-2-pyrrolidone
    US4404391A|1983-09-13|Method for the preparation of N-methyl and -N-ethyl-1-pyrrolidones
    US3393237A|1968-07-16|Preparation of cyclohexylhydroxylamine
    US3966763A|1976-06-29|Process for producing 2-pyrrolidone
    US2109159A|1938-02-22|Process for preparing furfurylamines
    US3742049A|1973-06-26|Method for producing bis|alkane
    US2672480A|1954-03-16|Preparation of beta-alanine
    SU608475A3|1978-05-25|Method of preparing 1-phenyl-4-amino-5-chlorpyridazone-6
    KR920006319A|1992-04-27|Method for preparing N- | -ethylenediamine
    US2956051A|1960-10-11|Process for preparing cyclic amides
    Ikeda et al.1989|Effects of solvent and temperature on the 1, 4-asymmetric induction in the diastereoselective hydrogenation of dehydrodipeptides
    JP3171635B2|2001-05-28|Synthetic method of citraconic imide
    US3089898A|1963-05-14|Preparation of methyl acrylate
    JPH07116139B2|1995-12-13|Method for producing lactams
    US3481938A|1969-12-02|Process for the preparation of piperidine
    同族专利:
    公开号 | 公开日
    JPS54112858A|1979-09-04|
    BE873470A|1979-07-16|
    NL7800644A|1979-07-23|
    FR2415100B1|1983-07-22|
    ES476964A1|1979-06-16|
    DE2901912A1|1979-07-26|
    US4193925A|1980-03-18|
    DE2901912C2|1987-12-10|
    IT7947685D0|1979-01-17|
    FR2415100A1|1979-08-17|
    CA1101429A|1981-05-19|
    GB2012748A|1979-08-01|
    IT1114715B|1986-01-27|
    JPS6339586B2|1988-08-05|
    GB2012748B|1982-04-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4123438A|1975-03-05|1978-10-31|Stamicarbon, B.V.|Process for preparing 2-pyrrolidones|NL7902537A|1979-04-01|1980-10-03|Stamicarbon|PROCESS FOR THE PREPARATION OF ANY C-SUBSTITUTED 2-PYRROLIDONE AND CATALYST TO BE USED THEREOF|
    NL7909230A|1979-12-21|1981-07-16|Stamicarbon|PROCESS FOR PREPARING A 2-PYRROLIDONE.|
    EP1389467B1|2001-05-23|2013-07-03|Mitsubishi Tanabe Pharma Corporation|Therapeutic composition for the regenerative treatment of cartilage diseases|
    KR101242310B1|2004-05-17|2013-03-12|오츠카 세이야쿠 가부시키가이샤|Thiazole compound and use thereof|
    CN103189520B|2010-09-30|2014-11-26|大象株式会社|Method for preparing 2-pyrrolidone using biomass|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    NL7800644A|NL7800644A|1978-01-19|1978-01-19|PROCESS FOR THE PREPARATION OF 2-PYRROLIDONE.|
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