公开(公告)号：DE3666222D1

公开(公告)日：1989-11-16

申请号：DE3666222

申请日：1986-03-27

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANO SHIRO ,  TOKUNAGA MAREO ,  KAMBARA YOSHIHIKO

IPC: C07B61/00 ,  A61K31/33 ,  A61K31/435 ,  A61K31/495 ,  A61P31/04 ,  B01J25/00 ,  C07C67/00 ,  C07C231/00 ,  C07C231/06 ,  C07C233/09 ,  C07D20060101 ,  C07D213/61 ,  C07D213/77 ,  C07D213/78 ,  C07D213/80 ,  C07D471/04 ,  C07C102/08 ,  C07C103/133

Abstract: A catalyst useful in the practice of a process, in which (meth)acrylamide is prepared through the hydration reaction between (meth)acrylonitrile and water in a suspended liquid-phase bed of a Raney copper catalyst, has been obtained by leaching a Raney copper alloy in the presence of the Raney copper catalyst which has been deteriorated. The above useful catalyst has higher performances, compared with a catalyst obtained by conventionally leaching the Raney copper alloy alone, has satisfactory handling properties in settling and filtering, and can significantly reduced the amount of catalyst to be discarded.

公开(公告)号：BR8700516A

公开(公告)日：1987-12-08

申请号：BR8700516

申请日：1987-02-05

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANO SHIRO ,  SHIZUKA KOHEI ,  KAMBARA YOSHIHIKO

IPC: C07B61/00 ,  B01J23/00 ,  B01J23/72 ,  C07C67/00 ,  C07C231/00 ,  C07C231/06 ,  C07C233/09

Abstract: Disclosed is a method for stopping and starting a reactor equipped with a heat exchanger, a catalyst settler, a catalyst filter and the like, which method is suitable for use in a process for the preparation of acrylamide by reacting acrylonitrile with water in the presence of a metallic copper-based catalyst used as a suspended bed. According to this method, various undesired phenomena which may occur at the beginning of operation can be prevented by discharging the metallic copper-based catalyst until the total amount of metallic copper and copper oxides present in the catalyst remaining in the reactor is not greater than a certain level based on the amount of metallic copper catalyst used at the beginning of the operation, or by discharging the catalyst until the amount of copper oxides is not greater than a certain level and then establishing an inert environment within the reactor.

公开(公告)号：ZA8700487B

公开(公告)日：1987-08-26

申请号：ZA8700487

申请日：1987-01-22

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANO SHIRO ,  SHIZUKA KOHEI ,  KAMBARA YOSHIHIKO

IPC: C07B61/00 ,  B01J23/00 ,  B01J23/72 ,  C07C67/00 ,  C07C231/00 ,  C07C231/06 ,  C07C233/09 ,  C07C

CPC classification number: B01J23/72 ,  C07C233/09

公开(公告)号：AU5630386A

公开(公告)日：1986-10-30

申请号：AU5630386

申请日：1986-04-17

Applicant: MITSUI TOATSU CHEMICALS

Inventor： KAMBARA YOSHIHIKO ,  ASANO SHIRO ,  ISOZAKI WATARU ,  KITADO SYOJI ,  YAMAGUCHI MASAO

IPC: C07C231/24 ,  B01D9/00 ,  C08J3/12 ,  C07C103/133 ,  C07C102/00

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%.

公开(公告)号：DE3123936A1

公开(公告)日：1982-04-29

申请号：DE3123936

申请日：1981-06-16

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANO SHIRO ,  SHIZUKA KOHEI ,  KAMBARA YOSHIHIKO ,  MIKAMI JUNJI ,  KATO HIROSHI ,  HONDA TADATOSHI

IPC: C07C231/24 ,  B01J23/00 ,  C07C233/09 ,  C07C253/34 ,  C08F20/52 ,  C08F120/56 ,  C07C103/133 ,  C07C102/08

Abstract: An aqueous solution of acrylamide obtained by catalytic hydration of acrylonitrile in the presence of a copper-based catalyst is purified by the steps, in sequence, of (a) removal of the unreacted acrylonitrile, (b) removal of copper, (c) treatment under basic conditions, (d) cation exchanging treatment and (e) weakly basic anion exchanging treatment. The acrylamide obtained by this process has good storage stability. An acrylamide polymer produced from this monomer is useful as a flocculant having a reduced content of the unreacted monomer, a high molecular weight and excellent solubility in water.

公开(公告)号：AU2147477A

公开(公告)日：1978-07-27

申请号：AU2147477

申请日：1977-01-20

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANO SHIRO ,  SHIZUKA KOEHI ,  MIKAMI JUNJI ,  MATSUMARA MUTSUO ,  HIRAKAWA HENICHI

IPC: C07C231/06 ,  B01D15/04 ,  C07C20060101 ,  C07C67/00 ,  C07C231/00 ,  C07C231/24 ,  C07C233/09 ,  C08F120/56 ,  C07C103/133

公开(公告)号：DE2703935A1

公开(公告)日：1977-08-18

申请号：DE2703935

申请日：1977-01-31

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANO SHIRO ,  SHIZUKA KOHEI ,  MOBARA CHIBA ,  MIKAMI JUNJI ,  HIRAKAWA KENICHI ,  MATSUMURA MUTSUO ,  TAKAISHI OSAKA

IPC: C07C231/06 ,  B01D15/04 ,  C07C20060101 ,  C07C67/00 ,  C07C231/00 ,  C07C231/24 ,  C07C233/09 ,  C08F120/56 ,  C07C103/133

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：IT971640B

公开(公告)日：1974-05-10

申请号：IT3260572

申请日：1972-12-06

Applicant: MITSUI TOATSU CHEMICALS

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

IPC: C07C231/22 ,  C07C67/00 ,  C07C231/00 ,  C07C231/06 ,  C07C233/09 ,  C07C