公开(公告)号：DE3126999A1

公开(公告)日：1982-03-25

申请号：DE3126999

申请日：1981-07-08

Applicant: MITSUI TOATSU CHEMICALS

Inventor： SAITO JUN ,  HONDA TADATOSHI ,  MITSUISHI TAKATOSHI ,  ITOH HIROSHI

IPC: C07C231/24 ,  C02F1/54 ,  C07C233/09 ,  C08F20/56 ,  C08F120/56 ,  D21H17/45 ,  C07C103/133 ,  C07C102/08

公开(公告)号：FR2489338A1

公开(公告)日：1982-03-05

申请号：FR8116859

申请日：1981-09-04

Applicant: MITSUI TOATSU CHEMICALS

Inventor： HONDA TADATOSHI ,  ITOH HIROSHI ,  SAITO JUN ,  MITSUISHI TAKATOSHI

IPC: B01D21/01 ,  C07C233/09 ,  C08F2/00 ,  C08F2/10 ,  C08F2/16 ,  C08F20/52 ,  C08F20/56 ,  C08F220/56 ,  C02F1/56

Abstract: Polyacrylamide useful as a high- molecular-weight, water-soluble cationic flocculant, is produced by polymerizing acrylamide which is substantially free from N-acryloyl acrylamide with a minor amount of cationic monomer. Crude acrylamide is preferably obtained by catalytic hydration of acrylonitrile with water in the presence of a metallic copper catalyst at a pH in the range of from 4 to 10, and then rendered substantially free from N-acryloyl acrylamide by physical adsorption, reactive adsorption, decomposition by a chemical reaction or a solvent extraction.

公开(公告)号：FI812485L

公开(公告)日：1982-03-05

申请号：FI812485

申请日：1981-08-12

Applicant: MITSUI TOATSU CHEMICALS

Inventor： HONDA TADATOSHI ,  SAITO JUN ,  ITOH HIROSHI ,  MITSUISHI TAKATOSHI

IPC: B01D21/01 ,  C07C233/09 ,  C08F2/00 ,  C08F2/10 ,  C08F2/16 ,  C08F20/52 ,  C08F20/56 ,  C08F220/56 ,  C08F

Abstract: Polyacrylamide useful as a high- molecular-weight, water-soluble cationic flocculant, is produced by polymerizing acrylamide which is substantially free from N-acryloyl acrylamide with a minor amount of cationic monomer. Crude acrylamide is preferably obtained by catalytic hydration of acrylonitrile with water in the presence of a metallic copper catalyst at a pH in the range of from 4 to 10, and then rendered substantially free from N-acryloyl acrylamide by physical adsorption, reactive adsorption, decomposition by a chemical reaction or a solvent extraction.

公开(公告)号：AU4966072A

公开(公告)日：1974-06-06

申请号：AU4966072

申请日：1972-12-05

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANO SHIRO ,  YOSHIMURA KIYOTAKA ,  TSUCHIYA RYOJI ,  HONDA TADATOSHI

IPC: C07C231/00 ,  C07C67/00 ,  C07C231/24 ,  C07C233/09 ,  C07C103/12

公开(公告)号：AU4564872A

公开(公告)日：1974-02-21

申请号：AU4564872

申请日：1972-08-16

Applicant: MITSUI TOATSU CHEMICALS

Inventor： HASHIMOTO NOBUYOSHI ,  YOSHIMURA KIYOTAKA ,  ASANO SHIRO ,  HONDA TADATOSHI ,  TSUCHIYA RYOZI

IPC: B01J8/20 ,  B01J8/22 ,  C07C20060101 ,  C07C67/00 ,  C07C231/00 ,  C07C231/06 ,  C07C233/09 ,  C07C103/08 ,  C07C103/12

公开(公告)号：AU2715695A

公开(公告)日：1996-02-22

申请号：AU2715695

申请日：1995-07-25

Applicant: MITSUI TOATSU CHEMICALS

Inventor： HONDA TADATOSHI ,  OHE HIROSHI ,  ICHIKAWA SHINICHIRO ,  KUBOYAMA HISAHARU ,  MIYAZOE SATORU

IPC: B01J23/72 ,  C01G3/00 ,  C07C231/06 ,  B01J37/16

Abstract: A copper catalyst is obtained by reducing a precursor containing copper and aluminum and not containing substantially malachite and aluminum hydroxide. It's use in the hydration of nitriles permits the preparation of amides with a high productivity and in a high selectivity.

公开(公告)号：DE3581587D1

公开(公告)日：1991-03-07

申请号：DE3581587

申请日：1985-11-05

Applicant: MITSUI TOATSU CHEMICALS

Inventor： UENO TOMOYUKI ,  HONDA TADATOSHI ,  JIMBO TAKASHI ,  KOTANI MAKOTO ,  TERADA KAZUHIRO ,  KIYONO SHINJI

IPC: C07D209/04 ,  B01J23/90 ,  C07D209/08 ,  B01J23/94 ,  B01J23/96

Abstract: In a process for preparing an indole by reacting an aniline with a diol, a catalyst the activity of which has been reduced through its use in the reaction is brought into contact with an inert gas containing 5 vol.% or less of oxygen so that the catalyst is regenerated for its repeated utilization. The activity of the regenerated catalyst is enhanced further when it is subjected to a reducing treatment for activation upon its reutilization.

公开(公告)号：IT1193553B

公开(公告)日：1988-07-08

申请号：IT2461380

申请日：1980-09-11

Applicant: MITSUI TOATSU CHEMICALS

Inventor： SAITOH JUN ,  MITSUISHI TAKATOSHI ,  ITOH HIROSHI ,  HONDA TADATOSHI

IPC: C07C20060101 ,  C08F8/12 ,  C08F120/56 ,  G01N11/00 ,  C07C

Abstract: A process for purifying an aqueous acrylamide solution which has been obtained through catalytic hydration of acrylonitrile in the presence of a copper-containing catalyst, by the steps of passing said solution through a OH-form strongly basic anion exchange resin layer and then, through a H-form cation exchange resin layer, is disclosed.

公开(公告)号：FR2489338B1

公开(公告)日：1987-04-30

申请号：FR8116859

申请日：1981-09-04

Applicant: MITSUI TOATSU CHEMICALS

Inventor： HONDA TADATOSHI ,  ITOH HIROSHI ,  SAITO JUN ,  MITSUISHI TAKATOSHI

IPC: B01D21/01 ,  C07C233/09 ,  C08F2/00 ,  C08F2/10 ,  C08F2/16 ,  C08F20/52 ,  C08F20/56 ,  C08F220/56 ,  C02F1/56

Abstract: Polyacrylamide useful as a high- molecular-weight, water-soluble cationic flocculant, is produced by polymerizing acrylamide which is substantially free from N-acryloyl acrylamide with a minor amount of cationic monomer. Crude acrylamide is preferably obtained by catalytic hydration of acrylonitrile with water in the presence of a metallic copper catalyst at a pH in the range of from 4 to 10, and then rendered substantially free from N-acryloyl acrylamide by physical adsorption, reactive adsorption, decomposition by a chemical reaction or a solvent extraction.

公开(公告)号：CH653674A5

公开(公告)日：1986-01-15

申请号：CH374183

申请日：1983-07-07

Applicant: MITSUI TOATSU CHEMICALS

Inventor： KUDOH AKIHIDE ,  HONDA TADATOSHI ,  KOTANI MAKOTO ,  TERADA KAZUHIRO ,  TSUDA TAKESHI ,  KIYONO SHINJI

IPC: C07D209/04 ,  B01J21/00 ,  B01J23/00 ,  B01J27/00 ,  C07B61/00 ,  C07D209/08