Preparation of lactams from cycloalkanes
    21.
    发明授权
    Preparation of lactams from cycloalkanes 失效
    环孢素的制备

    公开(公告)号:US3652552A

    公开(公告)日:1972-03-28

    申请号:US3652552D

    申请日:1967-12-18

    Applicant: STAMICARBON

    CPC classification number: C07D201/10

    Abstract: A PROCESS FOR PRODUCING LACTAMS FROM CYCLOALKANES IS DISCLOSED. CYCLOALKANES ARE REACTED WITH NITROSYL CHLORIDE WHILE SUBJECTED TO IRRADIATION, IN THE PRESENCE OF A NITRILE WHICH DOES NOT CONTAIN ANY METHYLENE GROUPS CAPABLE OF REACTING WITH NITROSYL UNDER THE REACTION CONDITIONS. WLACTAMS ARE DIRECTLY PRODUCED BY HEATING THE REACTION PRODUCT.

    Method for producing epsilon-caprolactam
    25.
    发明申请
    Method for producing epsilon-caprolactam 失效
    生产ε-己内酰胺的方法

    公开(公告)号:US20050010020A1

    公开(公告)日:2005-01-13

    申请号:US10883822

    申请日:2004-07-06

    CPC classification number: C07D201/04 Y02P20/52

    Abstract: ε-Caprolactam is produced by the method comprising the step of introducing a gas comprising cyclohexanone oxime into a layer of solid catalyst particles through a plurality of holes of a gas diffusion plate so that the solid catalyst particles are brought into contact with the gas, while fluidizing the catalyst layer, wherein the holes have an average diameter of about 3 mm or smaller. In accordance with the production method, ε-caprolactam can be produced from a raw material gas comprising cyclohexanone oxime with a high conversion of cyclohexanone oxime and a high selectivity to ε-caprolactam.

    Abstract translation: ε-己内酰胺通过包括以下步骤的方法制备:包括环己酮肟的气体通过气体扩散板的多个孔引入固体催化剂颗粒层中,使得固体催化剂颗粒与气体接触,同时 使催化剂层流化,其中孔的平均直径为约3mm或更小。 根据制造方法,ε-己内酰胺可以由包含环己酮肟的高转化率和对ε-己内酰胺的高选择性的环己酮肟的原料气体制备。

    Process for the preparation of .omega.-lactams, in particular caprolactam
    26.
    发明授权
    Process for the preparation of .omega.-lactams, in particular caprolactam 失效
    制备ω-内酰胺的方法,特别是己内酰胺

    公开(公告)号:US4349473A

    公开(公告)日:1982-09-14

    申请号:US199218

    申请日:1980-10-21

    Abstract: Process for the preparation of .omega.-lactams (in particular caprolactam)ith improved yields, by reaction of cycloaliphatic derivatives having the general formula: ##STR1## wherein n=3-13 with nitrosating agents in the presence of dehydrating agents, characterized by the fact that the reaction is carried out a low temperature which is constant between stages, and in all the zones of a stage and with particular concentrations of the dehydrating agent.

    Abstract translation: 通过在脱水剂存在下,通过使具有以下通式的脂环族衍生物(其中n = 3-13)与亚硝化剂反应制备具有改善产率的ω-内酰胺(特别是己内酰胺)的方法,其特征在于: 反应进行阶段之间恒定的低温,在一个阶段的所有区域和特定浓度的脱水剂中进行。

    Process for the preparation of lactames through oxime isomerization
    27.
    发明授权
    Process for the preparation of lactames through oxime isomerization 失效
    通过肟异构化制备内酰胺的方法

    公开(公告)号:US4211700A

    公开(公告)日:1980-07-08

    申请号:US12495

    申请日:1979-02-15

    CPC classification number: C07D201/04

    Abstract: The invention relates to a process for the preparation of lactames according to the so-called "Beckmann rearrangement" which consists in isomerizing oximes in a sulfuric solution, the weight ratio percentage of sulfuric acid to the combined amount of sulfuric acid and water being raised to a value above that of the sulfuric solution feed.

    Abstract translation: 本发明涉及一种根据所谓的“贝克曼重排”制备内酰胺的方法,该方法包括在硫酸溶液中异构化肟,硫酸与硫酸和水的混合量的比例百分比提高至 值高于硫酸溶液进料的值。

    Method for the preparation of omega-lactams and their lactamizable precursors
    29.
    发明授权
    Method for the preparation of omega-lactams and their lactamizable precursors 失效
    制备欧米茄及其可乳化前体的方法

    公开(公告)号:US3733317A

    公开(公告)日:1973-05-15

    申请号:US3733317D

    申请日:1970-06-30

    Applicant: SNIA VISCOSA

    Inventor: GIUFFRE L SIOLI G

    CPC classification number: C07D201/10

    Abstract: THERE IS DESCRIBED A PROCESS FOR THE PREPARATION OF OMEGA-LACTAMS HAVING THE GENERAL FORMULA:

    O=C
    WHEREIN N= FROM 2 TO 13, AND/OR OF THEIR LACTAMIZABLE PRECURSORS, WHICH MAY BE CYCLOALIPHATIC OXIMES OR CYCLOALIPHATIC NITROSO DERIVATIVES, MONOMERS OR DIMERS CHARACTERIZED BY THE FACT THAT THE CORRESPONDING CYCLOMETHYLENE KETENE, HAVING THE GENERAL FORMULA

    O=C=C
    WHERE N HAS THE AFOREMENTIONED VALUE, IS SUBJECTED TO NITROSATION WITH A NITROSATING AGENT OF THE FORMULLA NOX, WHERE X CAN BE -HSOBJ4, -CL, -NO2, -OR (IN WHICH R INDICATES AN ALKYL OR ARYL ORGANIC SUBSTITUENT), AT A TEMPERATURE COMPRISED BETWEEN -60*C. AND + 100*C.

    Process for preparing epsilon-caprolactam
    30.
    发明授权
    Process for preparing epsilon-caprolactam 失效
    制备EPSILON-CAPROLACTAM的方法

    公开(公告)号:US3712887A

    公开(公告)日:1973-01-23

    申请号:US3712887D

    申请日:1970-10-02

    CPC classification number: C07D201/02

    Abstract: E-CAPROLACTAM IS PREPARED FROM A CYCLOHEXANE OXIDATION PRODUCT CONTAINING CYCLOHEXYL HYDROPEROXIDE AND OXIDATION BY-PRODUCTS INCLUDING 6-HYDROPEROXY-HEXANOIC ACID, WHICH HAS BEEN OBTAINED BY LIQUID PHASE OXIDATION OF CYCLOHEXANE, WITHOUT A METAL CATALYST, USING A MOLECULAR OXYGEN CONTAINING GAS, BY WASHING THE OXIDATION PRODUCT WITH WATER, SEPARATING THE RESULTING AQUEOUS PHASE CONTAINING 6-HYDROPEROXYHEXANOIC ACID AND HEATING THE ACID UNDER PRESSURE WITH AMMONIA AND HYDROGEN IN THE PRESENCE OF A HYDROGENATION CATALYST.

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