公开(公告)号：BR9005891A

公开(公告)日：1991-09-24

申请号：BR9005891

申请日：1990-11-21

Applicant: MITSUI TOATSU CHEMICALS

Inventor： YOSHIKAWA YUKIHIRO ,  HIHARA TOORU ,  YAMADA KUNIHIRO ,  TAKENAKA SHINJI ,  KAWAHARA KAZUNORI ,  KITAGAWA JUN

IPC: B01J23/92 ,  B01J38/68 ,  C01B7/04 ,  B01J38/48

Abstract: The catalytic activity of a chromium oxide-based catalyst used in the production of chlorine by oxidation of hydrogen chloride gas with an oxygen-containing gas is regenerated by impregnating it with an aqueous solution of chromic acid anhydride or of a chromium salt and then calcining the catalyst at a temperature not higher than 800 DEG C.

公开(公告)号：AT55766T

公开(公告)日：1990-09-15

申请号：AT85306670

申请日：1985-09-19

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANO SHIRO ,  KITAGAWA JUN

IPC: C07D213/82 ,  B01J25/00 ,  C07B31/00 ,  C07B43/06 ,  C07B61/00 ,  C07C67/00 ,  C07C231/00 ,  C07C231/06 ,  C07C231/08 ,  C07C233/09 ,  C07D213/81 ,  C07D233/00

Abstract: Disclosed herein is a process for the hydration of a nitrile compound. Owing to the use of a Raney copper catalyst having an iron content of 0.7 wt. % or less based on the copper component in a suspended state, the process allows the catalyst to retain high activity and facilitates the separation of the catalyst and liquid reaction mixture by sedimentalion and/or filtration. In an example, a catalyst with 0.1 iron achieved 67% conversion of acrylonitrile to acrylamide, whereas a catalyst with 1.56% iron achieved only 40%.

公开(公告)号：BR8504588A

公开(公告)日：1986-07-15

申请号：BR8504588

申请日：1985-09-19

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANO SHIRO ,  KITAGAWA JUN

IPC: C07D213/82 ,  B01J25/00 ,  C07B31/00 ,  C07B43/06 ,  C07B61/00 ,  C07C67/00 ,  C07C231/00 ,  C07C231/06 ,  C07C231/08 ,  C07C233/09 ,  C07D213/81 ,  C07D233/00 ,  C07C103/133 ,  C07C102/08

Abstract: Disclosed herein is a process for the hydration of a nitrile compound. Owing to the use of a Raney copper catalyst having an iron content of 0.7 wt. % or less based on the copper component in a suspended state, the process allows the catalyst to retain high activity and facilitates the separation of the catalyst and liquid reaction mixture by sedimentalion and/or filtration. In an example, a catalyst with 0.1 iron achieved 67% conversion of acrylonitrile to acrylamide, whereas a catalyst with 1.56% iron achieved only 40%.

公开(公告)号：DE69119035D1

公开(公告)日：1996-05-30

申请号：DE69119035

申请日：1991-11-14

Applicant: MITSUI TOATSU CHEMICALS

Inventor： HONDA TADATOSHI ,  HORIUCHI NOBUNHIKO ,  KITAGAWA JUN ,  MURAKAMI MASAMI ,  KAWAHARA KAZUNORI ,  IO HIROFUMI

IPC: B01J27/199 ,  B01J27/24 ,  C07C51/25 ,  F16G5/16

Abstract: A composite oxide catalyst represented by the general formula: Mo-V-P-X-Y (wherein X represents at least one element selected from the group consisting of Sb, Cu, Co, Bi and As; Y represents at least one element selected from the group consisting of K, Rb, Cs and Tl) and a method for preparing methacrylic acid through gas phase catalytic oxidation of methacrolein with molecular oxygen in the presence of the foregoing catalyst are herein disclosed. The catalyst exhibits excellent catalytic activity, selectivity to methacrylic acid, catalytic stability and lifetime.

公开(公告)号：ZA856934B

公开(公告)日：1986-04-30

申请号：ZA856934

申请日：1985-09-10

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANO SHIRO ,  KITAGAWA JUN

IPC: C07D213/82 ,  B01J25/00 ,  C07B31/00 ,  C07B43/06 ,  C07B61/00 ,  C07C67/00 ,  C07C231/00 ,  C07C231/06 ,  C07C231/08 ,  C07C233/09 ,  C07D213/81 ,  C07D233/00 ,  C07C

Abstract: Disclosed herein is a process for the hydration of a nitrile compound. Owing to the use of a Raney copper catalyst having an iron content of 0.7 wt. % or less based on the copper component in a suspended state, the process allows the catalyst to retain high activity and facilitates the separation of the catalyst and liquid reaction mixture by sedimentalion and/or filtration. In an example, a catalyst with 0.1 iron achieved 67% conversion of acrylonitrile to acrylamide, whereas a catalyst with 1.56% iron achieved only 40%.