中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

1148 records (took 0.02 seconds)

    Integrated process for cyclohexanone oxime production
    211.
    发明授权
    Integrated process for cyclohexanone oxime production 失效
    环己酮肟生产的综合工艺

    公开(公告)号：US5599987A

    公开(公告)日：1997-02-04

    申请号：US414677

    申请日：1995-03-31

    Applicant: Guy L. Crocco ,  John C. Jubin, Jr. ,  John G. Zajacek

    Inventor： Guy L. Crocco ,  John C. Jubin, Jr. ,  John G. Zajacek

    IPC: C07C249/04 ,  C07D201/02 ,  C07D201/04 ,  C07D201/06

    CPC classification number: C07C249/04 ,  Y02P20/125

    Abstract: An integrated process for producing cyclohexanone oxime, a caprolactam precursor, is provided wherein isopropanol is utilized to generate the hydrogen peroxide oxidizing agent. The acetone produced as a co-product is recycled back to the secondary alcohol by hydrogenation. Ammoximation of cyclohexanone is performed in the presence of water and an alcohol other than isopropanol such as methanol or t-butyl alcohol.

    Abstract translation: 提供了一种用于生产环己酮肟，己内酰胺前体的综合方法，其中使用异丙醇生成过氧化氢氧化剂。 作为副产物生产的丙酮通过氢化再循环回到仲醇中。 在水和除异丙醇之外的醇（如甲醇或叔丁醇）的存在下进行环己酮的接近。

    Preparation of lactams
    212.
    发明授权
    Preparation of lactams 失效
    内酰胺的制备

    公开(公告)号：US5493021A

    公开(公告)日：1996-02-20

    申请号：US360623

    申请日：1994-12-21

    Applicant: David Barratt ,  Laurent Gilbert

    Inventor： David Barratt ,  Laurent Gilbert

    IPC: C07D223/12 ,  B01J27/18 ,  B01J27/195 ,  C07D201/02 ,  C07D201/08

    CPC classification number: C07D201/08 ,  Y02P20/52

    Abstract: Lactams, in particular epsilon-caprolactam (a basic starting material for the production of nylon 6), are selectively prepared by cyclizing/reacting the corresponding aminonitriles with water, in the presence of a catalytically effective amount of a deactivation-resistant solid metal phosphate having the general formula (II):MH.sub.h (PO.sub.4).sub.n .multidot.(Imp).sub.pin which M is a divalent, trivalent, tetravalent or pentavalent element selected from among those of Groups 2a, 3b, 4b, 5b, 6b, 7b, 8, 2b, 3a, 4a and 5a of the Periodic Table, or mixture thereof, or M=0; Imp is a basic impregnating compound which comprises an alkali or alkaline earth metal, or mixture thereof, together with an electrical neutrality-ensuing counteranion therefor; n is 1, 2 or 3; h is 0, 1 or 2; and p is a number ranging from 0 to 1/3, corresponding to the molar ratio between the moiety Imp and the moiety MH.sub.h (PO.sub.4).sub.n.

    Abstract translation: 特别是ε-己内酰胺（用于生产尼龙6的基本起始材料）的内酰胺可以通过在催化有效量的具有失活性的固体金属磷酸盐的存在下使相应的氨基腈与水环化/反应来选择性地制备， 通式（II）：MHh（PO4）nx（Imp）p，其中M是选自组2a，3b，4b，5b，6b，7b，8,2b中的二价，三价，四价或五价元素 ，3a，4a和5a，或其混合物，或M = 0; Imp是包含碱金属或碱土金属或它们的混合物的基本浸渍化合物，以及随之而来的电中性的抗衡阴离子; n为1,2或3; h为0,1或2; p是0至1/3的数，对应于部分Imp与部分MHh（PO4）n之间的摩尔比。

    Preparation of 2-pyrrolidinone
    216.
    发明授权
    Preparation of 2-pyrrolidinone 失效
    2-吡咯烷酮的制备

    公开(公告)号：US3681387A

    公开(公告)日：1972-08-01

    申请号：US3681387D

    申请日：1970-10-16

    Applicant: SUN OIL CO

    Inventor： HOLLSTEIN ELMER J ,  SCOTT KENNETH A

    IPC: C07D201/02 ,  C07D201/08 ,  C07D27/08

    CPC classification number: C07D201/02 ,  C07D201/08

    Abstract: An improved process for preparing 2-pyrrolidinone at relatively low pressures which comprises reduction of succinimide in an aqueous system at temperatures of about 225* to 275* C., at a pressure in the range of about 1,200 to 1,500 p.s.i.g. and in the presence of a supported palladium catalyst.

    Abstract translation: 一种用于在相对低的压力下制备2-吡咯烷酮的改进方法，其包括在约225-275℃的温度下在水性体系中还原琥珀酰亚胺，压力范围为约1,200至1,500p.s.i。 并在负载型钯催化剂存在下进行。

Patent Agency Ranking