公开(公告)号：US4647661A

公开(公告)日：1987-03-03

申请号：US845122

申请日：1986-03-27

Applicant: Paolo Senni ,  Leandro Zuliani ,  Sergio Ferruzzi

Inventor： Paolo Senni ,  Leandro Zuliani ,  Sergio Ferruzzi

IPC: C07D201/16 ,  C07D201/08 ,  C07D201/10

CPC classification number: C07D201/08

Abstract: A method of preparing .omega.-lactams, in particular caprolactam, comprising: a step of premixing cycloaliphatic acids having the formula ##STR1## where n=3-13, with a dehydrating agent; the first step of reaction with a nitrosating agent; the second step of reaction with the addition of a very small amount of water corresponding to a molar ratio U=H.sub.2 O/SO.sub.3 within the 0.1 to 0.9 range; and the step of reclaiming the unreacted cycloaliphatic acid. The method affords improved output from the lactamization reaction and reduced byproducts.

Abstract translation: 一种制备ω-内酰胺，特别是己内酰胺的方法，包括：将具有式“IMAGE”的其中n = 3-13的脂环族酸与脱水剂预混合的步骤; 与亚硝化剂反应的第一步; 反应的第二步骤是加入相当于0.1至0.9范围内的摩尔比U = H 2 O / SO 3的非常少量的水; 以及回收未反应的脂环族酸的步骤。 该方法提供了来自内酰胺化反应的改进的产物和减少的副产物。

公开(公告)号：US3816410A

公开(公告)日：1974-06-11

申请号：US20619971

申请日：1971-12-08

Applicant: TEXACO INC

Inventor： DURANLEAU R ,  LOVE R

IPC: C07C205/51 ,  C07D201/02 ,  C07D201/10 ,  C07D41/06

CPC classification number: C07D201/02 ,  C07C201/12 ,  C07D201/10 ,  Y02P20/582 ,  C07C205/51

Abstract: A METHOD FOR PREPARAING LACTAMS BY THE STEPS OF (1) CLEAVING AND ESTERIFYING A CYCLIC ALPHA-NITROKETONE WITH AN ALCOHOL TO FORM AN ALKYL OMEGA-NITROESTER AND (2) CATALYST HYDROGENATING AND CYCLIZING THE NITROESTER TO A LACTAM.

公开(公告)号：US3391137A

公开(公告)日：1968-07-02

申请号：US46301965

申请日：1965-06-10

Applicant: STAMICARBON

Inventor： BIGOT JOHAN A ,  KERKHOFFS PIETER L

IPC: C07D201/10

CPC classification number: C07D201/10

公开(公告)号：US3297684A

公开(公告)日：1967-01-10

申请号：US34085564

申请日：1964-01-21

Applicant: TOYO RAYON CO LTD

Inventor： YOSHIKAZU ITO ,  KUNIO SHIJI ,  SAIHEI NOMURA ,  RYO ENDO ,  AKIO IKEYAMA ,  FUMINO NISHIKAWA

IPC: C01B7/00 ,  C01B7/01 ,  C07D201/10

CPC classification number: C07D201/10 ,  C01B7/01

公开(公告)号：US3239508A

公开(公告)日：1966-03-08

申请号：US27704463

申请日：1963-04-30

Applicant: TOYO RAYON CO LTD

Inventor： YOSHIKAZU ITO ,  YOICHI SHIMOKAWA

IPC: C07D201/04 ,  C07D201/10

CPC classification number: C07D201/04 ,  C07D201/10

公开(公告)号：USRE25937E

公开(公告)日：1965-12-07

申请号：US25937D

IPC: C07D201/10

CPC classification number: C07D201/10

公开(公告)号：US11370752B2

公开(公告)日：2022-06-28

申请号：US16482981

申请日：2018-01-31

Applicant: Evonik Operations GmbH

Inventor： Luca Cameretti ,  Jan Caßens ,  Ralf Meier

IPC: C07D201/04 ,  C07C45/48 ,  C07C49/413 ,  C07C49/307 ,  C07D201/10

Abstract: The invention relates to a method for producing cyclododecanone (CDON). During the production, contaminated cyclododecane (CDAN) is produced. This can be separated from CDON by distillation (CDAN-containing fraction). The separation of CDAN and impurities such as 13-oxabicyclo [7.3.1]tridecane occurs by crystallizing out CDAN from the CDAN-containing fraction.

公开(公告)号：US20190040005A1

公开(公告)日：2019-02-07

申请号：US16073941

申请日：2017-01-30

Applicant: BASF SE

Inventor： Richard DEHN ,  Ahmad DEHESTANI ,  Klemens MASSONNE ,  Steffen WAGLÖHNER ,  Joaquim Henrique TELES ,  Thomas SCHAUB ,  Till Christian BRÜGGEMANN ,  Carlos TELLAECHE HERRANZ ,  Oliver TRAPP ,  Jedrzej WYSOCKI

IPC: C07D201/10 ,  C07B43/02 ,  C07B43/06

Abstract: The present invention relates to a process for preparing C4-C15 lactams, in which a C1-C10-alkyl nitrite is reacted with a C4-C15-cycloalkane and is illuminated with a light-emitting diode during the reaction. This forms a C4-C15-cyclohexanone oxime which is then converted further to a C4-C15 lactam; the C1-C10 alcohol formed is recycled into the preparation of the C1-C10-alkyl nitrite.

公开(公告)号：US3933873A

公开(公告)日：1976-01-20

申请号：US477712

申请日：1974-06-10

Applicant: Richard F. Love ,  Kablaoui Mahmoud S. ,  Roger G. Duranleau

Inventor： Richard F. Love ,  Kablaoui Mahmoud S. ,  Roger G. Duranleau

IPC: C07C205/51 ,  C07D201/02 ,  C07D201/10 ,  C07C99/00

CPC classification number: C07D201/02 ,  C07C201/12 ,  C07C201/14 ,  C07C227/04 ,  C07C227/20 ,  C07D201/10 ,  C07C2101/20

Abstract: A method for preparing omega-aminoalkanoic acids by the steps of (1) nitro-oxidizing a cycloalkene to a cyclic alpha-nitroketone, (2) cleaving and esterifying a cyclic alpha-nitroketone with an alcohol to form an alkyl omega-nitroester, (3) catalytically hydrogenating the nitroester to an aminoester and (4) hydrolyzing the aminoester to an aminoalkanoic acid.

Abstract translation: 通过以下步骤制备ω-氨基链烷酸的方法：（1）将环烯烃硝基氧化成环状α-硝基酮，（2）用醇裂解和酯化环状α-硝基酮以形成烷基ω-硝基酯（ 3）将硝酯催化氢化成氨基酯，和（4）将氨基酯水解成氨基链烷酸。

公开(公告)号：US3835124A

公开(公告)日：1974-09-10

申请号：US32556373

申请日：1973-01-22

Applicant: SNIA VISCOSA

Inventor： GIUFFRE L ,  SIOLI G ,  MATTONE R

IPC: C07D201/02 ,  C07C67/00 ,  C07C201/00 ,  C07C207/00 ,  C07C239/00 ,  C07C251/46 ,  C07D201/04 ,  C07D201/10 ,  C07D205/08 ,  C07D207/263 ,  C07D223/02 ,  C07D41/06

CPC classification number: C07D201/10

Abstract: A method for the preparation of omega lactams is disclosed, more particularly epsilon caprolactam or a precursor thereof (such as cyclohexanone oxime), using as the starting material a cyclomethylene ketene, with the simultaneous formation of side products such as cyclohexanecarboxylic acid, wherein an adduct is preliminarly formed between cyclomethylene ketene and sulphur dioxide. The adduct is then reacted with a nitrosating agent so as to obtain, under the appropriate reaction conditions, the expected lactam, more specifically epsilon caprolactam.

Abstract translation: 公开了制备ω内酰胺的方法，更特别的是ε己内酰胺或其前体（例如环己酮肟），其以起始材料为环亚甲基乙烯酮，同时形成副产物如环己烷羧酸，其中加合物 在环亚甲基乙烯酮和二氧化硫之间初步形成。 然后将加合物与亚硝化剂反应，以在适当的反应条件下获得预期的内酰胺，更具体地是ε己内酰胺。