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    1.
    发明专利
    未知

    公开(公告)号：BR9502786A

    公开(公告)日：1996-03-12

    申请号：BR9502786

    申请日：1995-06-13

    Applicant: DAICEL CHEM

    Inventor： MIURA HIROYUKI ,  SHIMIZU MASAHIKO ,  SATO TAKASHI ,  MORIMOTO YOSHIAKI ,  KAGOTANI MASAHIRO

    IPC: C07C51/12 ,  C07C51/44 ,  C07C53/08

    Abstract: A high purity acetic acid is prepared by reacting methanol with carbon monoxide in the presence of a rhodium catalyst, iodide salts, and methyl iodide, wherein an acetaldehyde concentration in the reaction liquid is maintained at 400 ppm or lower. This may be attained by contacting the liquid containing carbonyl impurities with water to separate and remove the carbonyl impurities. After that, the liquid can be returned to the reactor.

    2.
    发明专利
    未知

    公开(公告)号：DE69506808T2

    公开(公告)日：1999-05-20

    申请号：DE69506808

    申请日：1995-07-24

    Applicant: DAICEL CHEM

    Inventor： KIMURA SATOSHI ,  UENO TAKASHI ,  MORIMOTO YOSHIAKI

    IPC: C07C51/44 ,  C07C53/08

    Abstract: A method for purifying acetic acid containing at least one component selected from the group consisting of organoiodine compounds, metalloiodine compounds, iodide ions, unsaturated compounds and carbonyl compounds as an impurity, which comprises purifying the acetic acid with a distillation column having at least 30 plates by operating the distillation column under a pressure ranging from 40 to 760 mmHg at a reflux ratio of at least 4, gives a high-quality acetic acid which exhibits high marks in the potassium permanganate test without the necessities of the addition of any chemical to the acetic acid to be purified and a large energy, and economically.

    3.
    发明专利
    未知

    公开(公告)号：DE69505190T2

    公开(公告)日：1999-03-04

    申请号：DE69505190

    申请日：1995-06-13

    Applicant: DAICEL CHEM

    Inventor： MIURA HIROYUKI ,  SHIMIZU MASAHIKO ,  SATO TAKASHI ,  MORIMOTO YOSHIAKI ,  KAGOTANI MASAHIRO

    IPC: C07C51/12 ,  C07C51/44 ,  C07C53/08

    Abstract: A high purity acetic acid is prepared by reacting methanol with carbon monoxide in the presence of a rhodium catalyst, iodide salts, and methyl iodide, wherein an acetaldehyde concentration in the reaction liquid is maintained at 400 ppm or lower. This may be attained by contacting the liquid containing carbonyl impurities with water to separate and remove the carbonyl impurities. After that, the liquid can be returned to the reactor.

    PROCESS FOR PRODUCING ACETIC ACID
    6.
    发明公开
    PROCESS FOR PRODUCING ACETIC ACID 失效
    VERFAHREN ZUR HERSTELLUNG VONESSIGSÄURE

    公开(公告)号：EP0768295A4

    公开(公告)日：1997-07-16

    申请号：EP96910221

    申请日：1996-04-22

    Applicant: DAICEL CHEM

    Inventor： MORIMOTO YOSHIAKI ,  NAKAYAMA HIROYUKI ,  UENO TAKASHI

    IPC: B01J31/02 ,  B01J31/28 ,  B01J31/30 ,  C07C51/12 ,  C07C51/10 ,  B01J27/13 ,  C07C51/44 ,  C07C53/08

    CPC classification number: B01J31/30 ,  B01J31/0231 ,  C07C51/12 ,  C07C53/08

    Abstract: A process for producing acetic acid by reacting methanol, methyl acetate and the like with carbon monoxide continuously in the presence of a group 8 metal catalyst, methyl iodide and water, wherein water is added to the first distillation column to maintain the state of liquid separation at a decanter on top of the column. It is possible to produce acetic acid with a high quality unattainable heretobefore while reducing the energy of purification.

    Abstract translation: 在甲醇，乙酸甲酯等与一氧化碳在8族金属催化剂，甲基碘和水的存在下连续反应生产乙酸的方法，其中将水加入到第一蒸馏塔中以保持液体分离的状态 在列顶部的滗水器上。 有可能生产出前所未有的高品质醋酸，同时降低了净化能。

    9.
    发明专利
    未知

    公开(公告)号：DE69414361D1

    公开(公告)日：1998-12-10

    申请号：DE69414361

    申请日：1994-08-16

    Applicant: DAICEL CHEM

    Inventor： MORIMOTO YOSHIAKI ,  TANIGAWA HIROTO ,  AKITA KAZUYUKI

    IPC: C07C51/12 ,  C07C51/44 ,  C07C51/56 ,  C07C51/573 ,  C07C53/08 ,  C07C53/12 ,  B01J31/16

    Abstract: A process for producing acetic anhydride alone or both of acetic anhydride and acetic acid by the reaction of methyl acetate and/or dimethyl ether and, as optional component(s), water and/or methanol with carbon monoxide alone or both of carbon monoxide and hydrogen in the presence of a rhodium compound and methyl iodide as the principal catalysts, wherein trace impurities causative of tar generation is removed by separating the same through distillation in the evaporator and/or in the subsequent refining step, thus reducing the generation of the tar which otherwise turns into a contaminant.

    10.
    发明专利
    未知

    公开(公告)号：DE69501352D1

    公开(公告)日：1998-02-12

    申请号：DE69501352

    申请日：1995-04-03

    Applicant: DAICEL CHEM

    Inventor： HARANO YOSHIYUKI ,  MORIMOTO YOSHIAKI

    IPC: C07C51/12 ,  C07C51/56 ,  C07C53/08 ,  C07C53/12 ,  C07C51/44 ,  C07C51/573

    Abstract: In the process for producing acetic anhydride and acetic acid by reacting methanol and methyl acetate, optionally together with dimethyl ether, with carbon monoxide, acetic anhydride and acetic acid are effectively produced with the use of a sequence of production facilities by carrying out separation of the low-boiling-point fraction consisting mainly of methyl iodide, methyl acetate and dimethyl ether with the use of at least two distillation zones, separating the catalyst of drops entrained from the vapor-liquid separation zone in at least one distillation zone and further by controlling the pressurization of the vapor-liquid separation zone and the above distillation zones under 5 bar to a pressure being larger than the atmospheric pressure.

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