公开(公告)号：DE3880110D1

公开(公告)日：1993-05-13

申请号：DE3880110

申请日：1988-12-09

Applicant: MITSUI PETROCHEMICAL IND

Inventor： MIZUNO KENICHI ,  FUJIMOTO TADAAKI ,  KONDO MASAHIRO

IPC: C07C213/10 ,  C07C215/76

Abstract: A method of purifying an aqueous solution of m-aminophenol containing m-phenylenediamine as impurity which comprises extracting the m-phenylenediamine from the aqueous solution with a halogenated hydrocarbon.

公开(公告)号：CA1093587A

公开(公告)日：1981-01-13

申请号：CA312322

申请日：1978-09-28

Applicant: MITSUI PETROCHEMICAL IND

Inventor： MIZUNO KENICHI ,  IWASAKI HIROSHI ,  NAMBU HIROHIKO

IPC: C07B61/00 ,  B01J27/00 ,  C07C67/00 ,  C07C407/00 ,  C07C409/16 ,  C07C179/06

Abstract: A process for the preparation of peroxides by condensation reaction of a tertiary organic hydroperoxide with a tertiary alcohol, which is characterized in that zinc chloride is present as a catalyst in an amount of at least 1 % by weight based on the tertiary alcohol, is disclosed. This process can be advantageously applied to continuous manufacture of peroxides, and according to this process, peroxides can be obtained in high yields.

公开(公告)号：DE3786718D1

公开(公告)日：1993-09-02

申请号：DE3786718

申请日：1987-03-30

Applicant: MITSUI PETROCHEMICAL IND

Inventor： TAKATA TOSHIMASA ,  MIZUNO KENICHI

IPC: C07D303/24 ,  C08G59/32 ,  C08G59/38 ,  C08G59/06 ,  C07D303/16

公开(公告)号：DE3775683D1

公开(公告)日：1992-02-13

申请号：DE3775683

申请日：1987-09-18

Applicant: MITSUI PETROCHEMICAL IND

Inventor： SHIRAKI SHIGEMI ,  MIZUNO KENICHI

IPC: B01J27/08 ,  B01J19/18 ,  B01J27/00 ,  C07B61/00 ,  C07C51/00 ,  C07C51/265 ,  C07C63/00 ,  C07C63/14 ,  C07C63/26 ,  C07C67/00 ,  C07C63/24 ,  C07C63/16 ,  C07C63/06 ,  C07C63/36 ,  C07C63/38

Abstract: A process for the continuous production of an aromatic carboxylic acid by oxidising an alkyl aromatic compound in the liquid phase with an oxygen-containing gas in a reactor, in the presence of a metal compound and/or a bromine-containing compound, which comprises recirculating a part of the reaction gas delivered from the reactor and freed from the condensing components by returning it to the gas region in the reactor. This process produces aromatic carboxylic acids of high quality, while reducing or eliminating foaming occurring on the liquid surface in the reactor.

公开(公告)号：DE3788555T2

公开(公告)日：1994-04-21

申请号：DE3788555

申请日：1987-10-12

Applicant: MITSUI PETROCHEMICAL IND

Inventor： SHIRAKI SHIGEMI ,  MIZUNO KENICHI

IPC: C07C63/26 ,  C07C51/42 ,  C07C51/487 ,  C07C51/215

Abstract: Crude terephthalic acid, as obtained by the oxidation of a p-dialkylbenzene and containing 4-carboxybenzaldehyde and other impurities, is purified by subjecting a high temperature aqueous solution of the crude terephthalic acid to oxidation under an oxygen-containing gas, at a feed rate of 0.4-10 moles oxygen per mole of the 4-carboxybenzaldehyde, followed by treatment with hydrogen.

公开(公告)号：DE3662188D1

公开(公告)日：1989-04-06

申请号：DE3662188

申请日：1986-10-06

Applicant: MITSUI PETROCHEMICAL IND

Inventor： MIZUNO KENICHI ,  JUJO YOZO ,  OYOSHI HAJIME

IPC: C07C39/15 ,  C07C43/23 ,  C08G63/62

Abstract: A triphenol type compound represented by the following formula: wherein R₁ , R₂ , R₃ , R₄ , R₅ and R₆ independently represent hydrogen, a halogen, a C₁-C₅ alkyl group or a C₁-C₅ alkoxy group.The triphenol type compound can be used, as a branching agent, for the production of a polycarbonate comprising (A) a carbonic acid component unit, (B) a divalent phenol component unit, and (C) a triphenol type compound component unit derived from the above-mentioned triphenol type compound. The triphenol type compound unit (C) is used in an amount 0. 0.01 to 10 mole%, based on the divalent phenol component unit (B) and the intrinsic viscosity [η], determined at 25°C in methylene chloride, of the polycarbonate is 0.4 to 1.0 dl/g and the glass transition temperature (Tg), determined by a differential scanning type calorimeter is 150°C to 300°C.

公开(公告)号：CA1329626C

公开(公告)日：1994-05-17

申请号：CA585294

申请日：1988-12-08

Applicant: MITSUI PETROCHEMICAL IND

Inventor： MIZUNO KENICHI ,  FUJIMOTO TADAAKI ,  KONDO MASAHIRO

IPC: C07C213/10 ,  C07C215/74

Abstract: Disclosed is a method of purifying an aqueous solution of m-aminophenol containing m-phenylenediamine as impurities, by extracting m-phenylenediamine from the aqueous solution with a halogenated hydrocarbon. Also disclosed is an improvement in a process of producing m-aminophenol comprising: reacting resorcinol with ammonia in water in the presence of a water soluble amination catalyst at elevated temperatures in a reaction vessel, and then separating m-aminophenol from the resultant reaction mixture. The improved process employes the above-mentioned purification method and comprises: (a) a step of removing unreacted ammonia from the reaction mixture and then crystallizing crude m-aminophenol from the reaction mixture; (b) a step of separating the crude m-aminophenol from the reaction mixture; (c) a step of adding a halogenated hydrocarbon to the resulting mother liquor to extract m-phenylenediamine as byproducts into the halogenated hydrocarbon, separating an aqueous phase from an organic phase, and recycling the aqueous phase to the reaction vessel; and (d) a step of distilling the crude m-aminophenol to provide high purity m-aminophenol.

公开(公告)号：DE3788555D1

公开(公告)日：1994-02-03

申请号：DE3788555

申请日：1987-10-12

Applicant: MITSUI PETROCHEMICAL IND

Inventor： SHIRAKI SHIGEMI ,  MIZUNO KENICHI

IPC: C07C63/26 ,  C07C51/42 ,  C07C51/487 ,  C07C51/215

Abstract: Crude terephthalic acid, as obtained by the oxidation of a p-dialkylbenzene and containing 4-carboxybenzaldehyde and other impurities, is purified by subjecting a high temperature aqueous solution of the crude terephthalic acid to oxidation under an oxygen-containing gas, at a feed rate of 0.4-10 moles oxygen per mole of the 4-carboxybenzaldehyde, followed by treatment with hydrogen.

公开(公告)号：CA1289150C

公开(公告)日：1991-09-17

申请号：CA547742

申请日：1987-09-24

Applicant: MITSUI PETROCHEMICAL IND

Inventor： SHIRAKI SHIGEMI ,  MIZUNO KENICHI

IPC: B01J27/08 ,  B01J19/18 ,  B01J27/00 ,  C07B61/00 ,  C07C51/00 ,  C07C51/265 ,  C07C63/00 ,  C07C63/14 ,  C07C63/26 ,  C07C67/00 ,  C07C63/06 ,  C07C63/15

Abstract: A process for the production of aromatic carboxylic acid in a continuous manner by oxidizing an alkyl aromatic compound in liquid phase with an oxygen-containing gas in the presence of heavy metal compound(s) and/or bromine-containing compound, which process is characterized by that a part of the reaction gas delivered from the reactor and freed from the condensing components is recirculated by returning it to the reactor at a portion within the gas region. Said process permits to produce aromatic carboxylic acids of high quality, while eliminating the troubles due to foaming occurring on the liquid surface in the reactor.

公开(公告)号：CA1259334A

公开(公告)日：1989-09-12

申请号：CA520239

申请日：1986-10-08

Applicant: MITSUI PETROCHEMICAL IND

Inventor： MIZUNO KENICHI ,  JUJO YOZO ,  OYOSHI HAJIME

IPC: C07C39/15 ,  C07C43/23 ,  C07C39/16 ,  C08G63/62

Abstract: TRIPHENOL TYPE COMPOUND AND POLYCARBONATE POLYMER AND PRODUCTION PROCESS THEREOF A triphenol type compound represented by the following formula: wherein R1 , R2 , R3 , R4 , R5 and R6 independently represent hydrogen, a halogen, a C1-C5 alkyl group or a C1-C5 alkoxy group. The triphenol type compound can be used, as a branching agent, for the production of a polycarbonate comprising (A) a carbonic acid component unit, (B) a divalent phenol component unit, and (C) a triphenol type compound component unit derived from the above-mentioned triphenol type compound. The triphenol type compound unit (C) is used in an amount of 0.01 to 10 mole%, based on the divalent phenol component unit (B) and the intrinsic viscosity ¢?!, determined at 25.degree.C in methylene chloride, of the polycarbonate is 0.4 to 1.0 dl/g and the glass transition temperature (Tg), determined by a differential scanning type calorimeter is 150.degree.C to 300.degree.C.