Process for preparing 5-vinyl-2-pyrrolidinone and intermediates therefor
    71.
    发明授权
    Process for preparing 5-vinyl-2-pyrrolidinone and intermediates therefor 失效
    制备5-乙烯基-2-吡咯烷酮的方法及其中间体

    公开(公告)号:US4621145A

    公开(公告)日:1986-11-04

    申请号:US556204

    申请日:1983-11-29

    摘要: 4-Amino-5-hexenoic acid is prepared by:(a) reacting 5-oxo-2-pyrrolidine-acetonitrile with hydrogen and dimethylamine in the presence of a palladium catalyst to form N,N-dimethyl-2-[5'-oxo-2'-pyrrolidine]ethylamine;(b) oxidizing N,N-dimethyl-2-[5'-oxo-2'-pyrrolidine]-ethylamine to produce the corresponding N-oxide derivative;(c) pyrolysis of the N-oxide derivative to form 5-vinyl-2-pyrrolidinone;(d) optionally, separating N,N-dimethyl-2-[5'-oxo-2'-pyrrolidine]ethylamine by-product from the 5-vinyl-2-pyrrolidinone product; and(e) hydrolyzing 5-vinyl-2-pyrrolidinone to form 4-amino-5-hexenoic acid.

    摘要翻译: 4-氨基-5-己烯酸通过以下步骤制备:(a)在钯催化剂存在下,使5-氧代-2-吡咯烷 - 乙腈与氢气和二甲基胺反应,形成N,N-二甲基-2- [5'- 氧代-2'-吡咯烷]乙胺; (b)氧化N,N-二甲基-2- [5'-氧代-2'-吡咯烷] - 乙胺,得到相应的N-氧化物衍生物; (c)N-氧化物衍生物的热解以形成5-乙烯基-2-吡咯烷酮; (d)任选地,从5-乙烯基-2-吡咯烷酮产物中分离N,N-二甲基-2- [5'-氧代-2'-吡咯烷]乙胺副产物; 和(e)水解5-乙烯基-2-吡咯烷酮以形成4-氨基-5-己烯酸。

    Extraction of aromatics with N-cyclohexyl-2-pyrrolidone
    72.
    发明授权
    Extraction of aromatics with N-cyclohexyl-2-pyrrolidone 失效
    用N-环己基-2-吡咯烷酮萃取芳族化合物

    公开(公告)号:US4569755A

    公开(公告)日:1986-02-11

    申请号:US701714

    申请日:1985-02-14

    CPC分类号: C10G21/20

    摘要: This invention relates to a low energy process for the solvent extraction of aromatic hydrocarbons from hydrocarbon streams containing the same, using as the solvent N-cyclohexyl-2-pyrrolidone together with small amounts of water. This solvent may be recovered from the aromatics by cooling the aromatic/solvent mixture, and adding water, whereby separation takes place without distillation. The solvent may then be separated from the water by heating the solvent/water mixture.

    摘要翻译: 本发明涉及一种低能量方法,用于从含有它们的烃流中溶剂萃取芳族烃,使用溶剂N-环己基-2-吡咯烷酮和少量水。 可以通过冷却芳族/溶剂混合物和加入水从芳族化合物中回收该溶剂,由此在没有蒸馏的情况下进行分离。 然后可以通过加热溶剂/水混合物将溶剂与水分离。

    Process for the production of 2-pyrrolidone
    75.
    发明授权
    Process for the production of 2-pyrrolidone 失效
    2-吡咯烷酮生产方法

    公开(公告)号:US4151171A

    公开(公告)日:1979-04-24

    申请号:US914107

    申请日:1978-06-09

    申请人: Victor P. Kurkov

    发明人: Victor P. Kurkov

    CPC分类号: C07D207/27

    摘要: A process for producing N-acyl-2-pyrrolidone which comprises a contacting N-acyl allylamine with carbon monoxide in the presence of an aliphatic carboxylic acid solvent and a homogeneous catalyst of palladium or platinum coordinated with triphenylphosphine. According to a preferred embodiment, the acyl group is removed from the N-acyl-2-pyrrolidone by contacting and heating the N-acyl-2-pyrrolidone with allylamine to thereby effect transacylation and obtain product 2-pyrrolidone and N-acyl-allylamine as a recycle feed stream. Alternatively, N-acyl-2-pyrrolidone can be hydrolyzed to 2-pyrrolidone and the carboxylic acid derived from the acyl group.

    摘要翻译: N-酰基-2-吡咯烷酮的制备方法,其包括在脂族羧酸溶剂和与三苯基膦配位的钯或铂的均相催化剂存在下,使N-酰基烯丙胺与一氧化碳接触。 根据优选的实施方案,通过N-酰基-2-吡咯烷酮与烯丙胺的接触和加热将酰基从N-酰基-2-吡咯烷酮中除去,从而进行转酰胺化,得到2-吡咯烷酮和N-酰基 - 烯丙胺 作为再循环进料流。 或者,N-酰基-2-吡咯烷酮可以水解成2-吡咯烷酮和衍生自酰基的羧酸。