公开(公告)号：US3541080A

公开(公告)日：1970-11-17

申请号：US3541080D

申请日：1967-07-24

Applicant: TORAY INDUSTRIES

Inventor： WAKAMATSU SHIGERU ,  KONDO RYOZO ,  SHINOMIYA MASAYASU ,  OKAMOTO MASARU

IPC: B23K9/12 ,  C07D201/04 ,  C07D201/10 ,  C07D41/06

CPC classification number: C07D201/10 ,  B23K9/125 ,  C07D201/04

公开(公告)号：US3700669A

公开(公告)日：1972-10-24

申请号：US3700669D

申请日：1968-10-31

Applicant: TORAY INDUSTRIES

Inventor： WAKAMATSU SHIGERU ,  KONDO RYOZO ,  SHINOMIYA MASAYASU

IPC: C07D201/16 ,  C07D41/06

CPC classification number: C07D201/16

Abstract: BY EXTRACTING A LACTAM-CONTAINING REACTION MIXTURE OBTAINED FROM THE BECKMANN REARRANGEMENT REACTION OF A CYCLIC KETOXIME IN THE PRESENCE OF WATER WITH LIQUID SULFUR DIOXIDE, THE LACTAM CAN BE EFFECTIVELY SEPARATED IN THE PURE STATE.

公开(公告)号：DE2354394A1

公开(公告)日：1975-05-07

申请号：DE2354394

申请日：1973-10-30

Applicant: TORAY INDUSTRIES

Inventor： YASUHARA YUTAKA ,  SHINOMIYA MASAYASU ,  NISHINO MASAKI

IPC: C07C51/31 ,  C07C51/32

Abstract: Aliphatic 5-12C dicarboxylic acids (I) are prepd. by (i) reacting a 5-12C cyclomonoalkene (II) with a 4-12C aliphatic dicarboxylic acid (III), in the presence of an acid catalyst, pref. at 80-180 degrees C, and (ii) oxidising the obtd. cycloalkyl esters of (III) with HNO3, pref. at 40-120 degrees C. (I) are starting materials for prodn. of synthetic fibres, plastic compsns. and plasticisers. (II) are cheap and easily available. (III) are not lost during oxidn. and can be recycled. Acid catalyst for esterification in (i) may be H2SO4, a sulphonic acid or a cation exchanger resin, esp. contg. acid gps. in which H atoms are partly replaced by metal ions. Oxidn. catalyst in (ii) may be a combination of soluble V- and soluble Cu cpds.