公开(公告)号：EP0972771A4

公开(公告)日：2005-06-22

申请号：EP98961601

申请日：1998-12-25

Applicant: DAICEL CHEM

Inventor： UENO TAKASHI

IPC: B01D3/34 ,  C07D313/04 ,  C07D315/00 ,  C08G63/08

CPC classification number: C07D315/00 ,  B01D3/34 ,  C07D313/04 ,  C08G63/08

Abstract: ε-Caprolactone which less discolors upon heating, has a purity of 99.8 wt.% or higher, and gives under given conditions a gas chromatogram showing that the total concentration of ingredients (low-boiling ingredients) having a retention time of 0.6 or below relative to a retention time of 1.00 for ε-caprolactone is 200 ppm or lower in terms of areal proportion; and a process for obtaining ε-caprolactone less discoloring upon heating which comprises oxidizing cyclohexanone together with an aldehyde or oxidizing cyclohexanone with a peracid to obtain ε-caprolactone and a carboxylic acid and then recovering the ε-caprolactone by distillation, wherein the distillation is conducted after an element of Groups 4A, 5A, 6A, 7A, 8, 1B, and 2B and/or a compound thereof is added to the reaction mixture.

公开(公告)号：IN189841B

公开(公告)日：2003-04-26

申请号：IN727DE1994

申请日：1994-06-07

Applicant: DAICEL CHEM

Inventor： UENO TAKASHI ,  TSUJI YASUO ,  MORIMOTO YOSHIAKI ,  SHIMIZU MASAHIKO ,  AKITA KAZUYUKI ,  KAJIKAWA YASUTERU

IPC: C07C51/12

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.

公开(公告)号：DE69506808D1

公开(公告)日：1999-02-04

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.

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。

公开(公告)号：IN191199B

公开(公告)日：2003-10-04

申请号：IN1412DE1995

申请日：1995-07-27

Applicant: DAICEL CHEM

Inventor： KIMURA SATOSHI ,  UENO TAKASHI ,  MORIMOTO YOSHIAKI

IPC: C07C51/44 ,  C07C53/08

公开(公告)号：DE69609796T2

公开(公告)日：2000-12-28

申请号：DE69609796

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 ,  C07C51/44 ,  C07C53/08 ,  B01J27/13

Abstract: The present invention provides a process for producing acetic acid by reacting continuously methanol, methyl acetate and the like with carbon monoxide in the presence of an eighth group metal-containing catalyst, methyl iodide and water, which is characterized in that wherein a liquid separation state in a decanter at the top of the first distillation column is maintained by adding water to the first distillation column. High quality acetic acid which has not so far been achieved can be obtained while controlling the purifying energy in a low level.

公开(公告)号：DE69609796D1

公开(公告)日：2000-09-21

申请号：DE69609796

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 ,  C07C51/44 ,  C07C53/08 ,  B01J27/13

Abstract: The present invention provides a process for producing acetic acid by reacting continuously methanol, methyl acetate and the like with carbon monoxide in the presence of an eighth group metal-containing catalyst, methyl iodide and water, which is characterized in that wherein a liquid separation state in a decanter at the top of the first distillation column is maintained by adding water to the first distillation column. High quality acetic acid which has not so far been achieved can be obtained while controlling the purifying energy in a low level.

公开(公告)号：JP2000143584A

公开(公告)日：2000-05-23

申请号：JP32267998

申请日：1998-11-12

Applicant: DAICEL CHEM

Inventor： ENDO TOSHIRO ,  UENO TAKASHI

IPC: B01J27/16 ,  C07C67/08 ,  C07C69/30

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a polyglycerol monofatty acid ester with little discoloring and useful as an emulsifier and a substrate for foods, cosmetics, medicines, etc. SOLUTION: In a method for producing a polyglycerol monofatty acid ester by reacting a fatty acid with glycidol in the presence of a phosphoric acid-based acidic catalyst, the reaction is carried out by dropping glycidol to the heated fatty acid under a reduced pressure. Glycidol is added by dropping at 120-150 deg.C heated temperature of the fatty acid and 350-750 mmHg pressure under a nitrogen gas atmosphere.

公开(公告)号：JPH09292301A

公开(公告)日：1997-11-11

申请号：JP10486896

申请日：1996-04-25

Applicant: DAICEL CHEM

Inventor： UENO TAKASHI ,  GOTO KENSUKE

IPC: G01M3/04 ,  B65D90/50

Abstract: PROBLEM TO BE SOLVED: To prevent the damage of equipment by sensing leakage at an early piriod by reducing the pressure between anticorrosion material and pressure- proof base material when the leakage is sensed through a sensing hole from the equipment, wherein the anticorrosion material is bonded to the pressure-proof material. SOLUTION: For example, when an anticorrosion material 2 such as titanium, zirconia and the like is bonded to pressure-proof base material 1 such as iron and copper by lining bonding or clad bonding and leaking material is detected through a sensing hole 3 from the inner surface of the bonded member, pressure is decreased by a pressure-reducing device 5, such as vacuum pump and an aspirator provided between a sensing hole 3 and sensor 5. Thus, the leakage can be sensed at the early period, the leaking material undergoes adiabatic flush at the same time, the temperature is lowered, the corrosion environment is improved and the corrosion speed can be decreased by a large extent.