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Mitsubishi Gas Chemical Company, Inc. Patents
Assignee:
Mitsubishi Gas Chemical Company, Inc.
Address:
Tokyo, JP
No. of patents:
1113
Patents:


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Patent Number Title Of Patent Date Issued
6117923 Resin for optical material September 12, 2000
A resinous composition which comprises a compound having, in one molecule, one or more structures of the formula (1) ##STR1## wherein R.sup.1 is a hydrocarbon having 1 to 10 carbon atoms; R.sup.2, R.sup.3 and R.sup.4 are each hydrogen or a hydrocarbon group having 1 to 10 carbon
6117538 Deoxidizing multilayered body and method or manufacturing the same September 12, 2000
An oxygen absorbent is provided which includes a multilayered body formed from a plurality of thin resin layers laminated over one another. At least one laminated side of this multilayered body is constructed as an oxygen-absorbing surface. The multilayered body includes an oxygen-ab
6114162 Atmosphere regulator and method for culturing anaerobic bacteria September 5, 2000
An atmosphere regulator which comprises 100 parts by weight an oxygen absorber comprising an ascorbic acid compound, a metallic salt, water and an activated carbon, and 5 to 20 parts by weight of an alkaline earth metal hydroxide. The atmosphere regulator has a pH, as measured in acc
6113927 Package and packaging method for aqueous liquid materials September 5, 2000
Provides a packaging method for aqueous liquid materials whereby a molded container in which an aqueous liquid material has been sealed can be packaged simply by sealing it within a packaging container of an oxygen-absorbent multilayer material provided with an oxygen layer, without
6113730 Metal-foil-clad composite ceramic board and process for the production thereof September 5, 2000
A metal-foil-clad composite ceramic board produced by impregnating a sintered substrate (II) of an inorganic continuously porous sintered body (I) having a true porosity of 12 to 50% and an open porosity of at least 10%, with a thermosetting resin (R) under vacuum, to form a resin-im
6111097 Process for producing carboxypolysaccharide August 29, 2000
In a process of producing a carboxypolysaccharide by oxidizing a polysaccharide in the presence of a ruthenium compound and an oxidizing agent, the expensive ruthenium is easily and efficiently recovered. Ruthenium dissolved in a reaction mixture after the oxidation of the polysaccha
6107510 Process for producing nitrile compound and catalyst used therefor August 22, 2000
There are disclosed a process for producing a nitrile compound which comprises catalytically reacting an alkyl group-substituted aromatic compound or an alkyl group-substituted heterocyclic compound with a mixed gas containing ammonia and oxygen in the presence of 1 a catalyst compri
6106770 Method for preventing obstruction in aluminum brass pipes in a water flow path August 22, 2000
A method for preventing obstruction in aluminum brass pipes in a water flow path, including the steps of continuously supplying iron ions or an iron ion supply compound to water in the water flow path in such a manner that a concentration of iron ions in the water is 0.005 to 0.05 mg/lit
6097089 Semiconductor plastic package, metal plate for said package, and method of producing copper-clad August 1, 2000
There is provided a semiconductor plastic package in the form in which at least one semiconductor chip is mounted on a small-sized printed wiring board, a metal plate for the above package and a method of producing a copper-clad board for the above package. More particularly, there is
6091874 Flexible optical waveguide device and process for the production thereof July 18, 2000
A flexible polymer optical waveguide device which is excellent in mechanical strength and durability against environments, particularly excellent in heat and chemical resistance, with maintaining characteristics of an optical waveguide and which can be easily produced, and a process
6080896 Process for producing polyhydric alcohol June 27, 2000
A process for producing a polyhydric alcohol with high selectivity by subjecting formaldehyde and a specific aliphatic aldehyde to an aldol condensation reaction in the presence of a base catalyst, and then subjecting the resultant reaction product to a crossed Cannizzaro reaction, w
6077980 Process for producing polyhydric alcohol June 20, 2000
A process for producing a polyhydric alcohol which comprises subjecting formaldehyde and a specific aliphatic aldehyde to an aldol condensation reaction in the presence of a base catalyst, and then subjecting the resultant reaction product to a crossed Cannizzaro reaction, while sepa
6075162 Integrated method for producing methyl methacrylate and hydrogen cyanide June 13, 2000
A method of producing methyl methacrylate comprises Step 1 of producing acetone cyanhydrin from hydrogen cyanide and acetone; Step 2 of producing .alpha.-hydroxyisobutyramide by hydrating acetone cyanhydrin; Step 3 of producing methyl .alpha.-hydroxyisobutyrate and ammonia by a reaction
6072098 Process for producing highly pure 2,6-dimethylnaphthalene June 6, 2000
There are disclosed an industrially advantageous process for efficiently producing highly pure 2,6-dimethylnaphthalene (DMN) in high yield from a mixture of DMN by carrying out in turn, the steps of isomerizing a mixture of DMN in the presence of a catalyst; crystallizing the isomerizati
6066226 Method of making a sheet-shaped oxygen absorber May 23, 2000
A method of making a sheet-shaped oxygen absorber includes preparing an oxygen-absorbing resin sheet having opposed first and second surfaces and including an oxygen-absorbing composition in a thermoplastic resin; applying first and second covering members to and in contact with the
6063938 Process for producing .epsilon.-caprolactone May 16, 2000
Disclosed is a process for producing .epsilon.-caprolactone which comprises distilling a reaction mixture obtained by oxidation of cyclohexanone to separate impurities, wherein .epsilon.-caprolactone separated in a rectifying column is contacted with an oxygen-containing gas and then
6063503 Oxygen-absorbing multi-layer film and method for preparing same May 16, 2000
An oxygen absorbing multi-layer film having a smooth surface is provided. The multi-layer film includes an oxygen permeating resin layer, a deoxidizing resin layer containing a particulate absorbing composition, a smoothing layer and a gas barrier layer. The oxygen absorbing multi-layer
6059878 Method of manufacturing a bismuth-substituted rare-earth iron garnet single crystal film May 9, 2000
A method is used when manufacturing a bismuth-substituted rare-earth iron garnet single crystal (BIG) film by the LPE method. The BIG film is grown on one side of a non-magnetic garnet substrate using a melt that contains flux components and rare-earth oxides. An amount of calcium is add
6056892 Method for purifying liquid crystal May 2, 2000
A process for purifying an anti-ferroelectric liquid crystal or a ferrielectric liquid crystal, which comprises the following steps 1 to 4,step 1: preparing a liquid crystal solution of an anti-ferroelectric liquid crystal or a ferrielectric liquid crystal to be purified in an aromatic h
6048437 Process for bleaching chemical pulp with chlorine dioxide, peroxide and Na.sub.2 M.sub.0 O.sub.4 April 11, 2000
A process for bleaching chemical pulp for paper manufacturing comprising delignifying and bleaching chemical pulp which has been treated by cooking by simultaneous use of chlorine dioxide, a peroxide, and at least one reaction catalyst selected from the group consisting of oxoacids of
6045743 Method for drying resin-used electronic parts April 4, 2000
Provided is a method for drying resin-used electronic parts which comprises enclosing resin-used electronic parts together with both an oxygen absorbent requiring no moisture for absorption of oxygen and a drying agent in a container having a gas barrier property and then sealing the
6039892 Oxygen absorbent composition March 21, 2000
There is disclosed herein an oxygen absorbent composition comprising an organic oxygen absorbent (A) which neither absorbs nor releases moisture and in which an oxidizable main component is supported on a porous silicate having an average pore diameter of 200 to 5,000 .ANG., and a fo
6031654 Low magnet-saturation bismuth-substituted rare-earth iron garnet single crystal film February 29, 2000
A low magnetic saturation type bismuth-substituted rare-earth iron garnet crystal film of the invention is grown on a substrate of (111) garnet single crystal (GdCa)3(GaMgZr)5O12 by using a liquid phase epitaxial method. This single crystal has a lattice constant of 1.2497.+-.0.0002 nm
6031122 Process for producing dialkyl carbonate February 29, 2000
A process for producing a dialkyl carbonate which comprises reacting at least one member selected from the group consisting of urea and alkyl carbamate with alcohol in the presence of both a catalyst and a high boiling point organic compound having a boiling point of 180.degree. C. or
6030449 Garnet single crystal for substrate of magneto-optic element and method of manufacturing thereof February 29, 2000
A garnet crystal for growing a substrate is used in manufacturing a magneto-optic element. The garnet is manufactured by a Czochralski method and has a chemical structure represented by La.sub.8-(x+y) Yb.sub.x Ga.sub.y O.sub.12 wherein x has the range 1.0.ltoreq.x.ltoreq.3.0, y has t
6018077 Process for producing 2,6-naphthalenedicarboxylic acid January 25, 2000
A process for producing 2,6-naphthalenedicarboxylic acid comprising oxidizing 2,6-dimethylnaphthalene with a gas containing oxygen in a solvent comprising a lower aliphatic carboxylic acid in the presence of a catalyst comprising cobalt, manganese, and bromine, wherein the total amou
6013237 Method for preparing high-purity aqueous hydrogen peroxide January 11, 2000
There is herein disclosed a method for preparing high-purity aqueous hydrogen peroxide by bringing aqueous hydrogen peroxide into contact with a strongly basic anion exchange resin, said method comprising the step of using the strongly basic anion exchange resin which is converted into a
6004477 Oxygen absorption composition December 21, 1999
An oxygen absorption composition without requiring moisture in oxygen absorption which comprises an oxygen absorbent comprising, as a principal component, an oligomer in liquid form having an unsaturated group, a number-average molecular weight in the range of 150 to 4,000 and a visc
6002042 Liquid crystal compound December 14, 1999
A liquid crystal compound represented by the following general formula (1): ##STR1## wherein R is a linear alkyl group having 6 to 12 carbon atoms, X and Y are both a hydrogen atom, or one of them is a hydrogen atom and the other is a fluorine atom, m is an integer of 0 to 5, n is an
6002015 Method of producing 1,2,4-triazole December 14, 1999
A method of producing 1,2,4-triazole, comprising a step of subjecting a ketazine, water and formamide to a cyclization reaction. The ketazine and water are added simultaneously to formamide kept at a cyclization temperature. Then, ketone by-produced during the cyclization reaction is
5998566 Phenol derivatives and process for their production December 7, 1999
The improved phenol derivatives having a phenolic structure as part of the molecular backbone are produced by reacting condensed polycyclic aromatic hydrocarbons, either individually or in combination with unsaturated cyclic aliphatic hydrocarbons, with phenols in the presence of Fri
5990324 Process for producing 3-methyltetrahydrofuran November 23, 1999
There is disclosed a process for producing 3-methyl-tetrahydrofuran which comprises the step 1 of subjecting the compound represented by the general formula [I]wherein R is an alkyl group having 1 to 3 carbon atoms and the formyl group may be present as an acetal having an alkanol with 1
5986134 Processes for producing ketazine and hydrazine November 16, 1999
A process for continuously and stably synthesizing a ketazine from hydrogen peroxide, ammonia and methyl ethyl ketone in the presence of a solution containing a catalyst. The process comprises removing sec-butyl alcohol by distillation from methyl ethyl ketone, which is reused by circula
5985172 Racemic compound and anti-ferroelectric liquid crystal composition containing the compound November 16, 1999
A racemic compound of the formula (1) ##STR1## and an anti-ferroelectric liquid crystal composition consisting essentially of said racemic compound and one anti-ferroelectric liquid crystal compound of the formula (2) or a mixture of two or more compounds selected from anti-ferro
5980790 Process for producing a copolymer November 9, 1999
A high quality copolymer of styrene and methyl methacrylate is economically produced by polymerizing styrene and methyl methacrylate in a homogeneous solution of raw materials comprising methyl methacrylate, styrene, and an antioxidant, while the solution of raw materials is continuously
5980780 Racemic compound and anti-ferroelectric liquid crystal composition containing the compound November 9, 1999
A racemic compound of the formula (1) ##STR1## and an anti-ferroelectric liquid crystal composition consisting essentially of said racemic compound and one anti-ferroelectric liquid crystal compound of the formula (2) or a mixture of two or more compounds selected from anti-ferro
5980445 Process for producing diaryl carbonate November 9, 1999
A process for producing diaryl carbonate which comprises (A) a step for producing dialkyl carbonate represented by the general formula RO--CO--OR by reacting urea with alkyl alcohol represented by the general formula ROH, (B) a step for producing both alkyl aryl carbonate represented by
5976487 Process for purifying an aqueous solution of hydrogen peroxide November 2, 1999
A process for purifying an aqueous solution of hydrogen peroxide comprising bringing the aqueous solution of hydrogen peroxide into contact with a cation exchange resin or an anion exchange resin, aging the obtained intermediately purified aqueous solution of hydrogen peroxide by standin
5976409 Swallow-tail-shaped liquid crystal compound November 2, 1999
A swallow-tail-shaped liquid crystal compound of the following general formula (1), ##STR1## wherein A is --O--, --COO-- or a single bond (--), m is an integer of 4 to 12, and n is an integer of 2 to 4.The above swallow-tail-shaped liquid crystal compound of the present invention
5972452 Sheet shaped oxygen absorbing member and method for manufacture thereof October 26, 1999
A sheet shaped oxygen absorbing member according to the present invention comprises a lamination in the order of a separator layer, a base layer having an adhesive layer, an oxygen absorbing layer and a gas permeable layer, the gas permeable layer being directly secured to the base layer
5972243 Ferrielectric liquid crystal compound October 26, 1999
A ferrielectric liquid crystal compound of the following general formula (1), ##STR1## wherein R is a linear alkyl group having 6 to 12 carbon atoms; X is a hydrogen atom or a fluorine atom; m and n are the same or different from each other, each being an integer of 1 to 3; and C
5969183 Process for producing acetic acid from methyl formate October 19, 1999
Provided is a process for producing acetic acid by carrying out reaction of methyl formate in the presence of a Group VIII metal catalyst, at least one iodine compound, acetic acid and carbon monoxide, continuously drawing a reaction mixture from a reactor, introducing the reaction mixtu
5968413 Anti-ferroelectric liquid crystal compounds October 19, 1999
Novel anti-ferroelectric liquid crystal compounds of the formula (1), ##STR1## wherein R is a linear alkyl group having 6 to 12 carbon atoms, X is a hydrogen atom or a fluorine atom, n is an integer of 2 to 7, p is an integer of 0 to 2 and C* is an asymmetric carbon atom. The above
5962385 Cleaning liquid for semiconductor devices October 5, 1999
A cleaning liquid for semiconductor devices comprising 1.0 to 5% by weight of a fluorine compound of the formula R.sub.4 NF, wherein R is a hydrogen atom or a C.sub.1 -C.sub.4 alkyl group, 72 to 80% by weight of an organic solvent soluble in water, and the remaining amount being water. T
5959140 Process for producing aromatic carboxylic acid September 28, 1999
There is disclosed a process for producing an aromatic carboxylic acid (e.g.iso-or-tere-phthalic acid) by liquid-phase oxidation of an alkyl-group-substituted aromatic compound (e.g. p-or-m-xylene) in acetic acid which comprises dehydrating water-containing acetic acid by azeotropic
5958184 Process for producing thiourea dioxide September 28, 1999
A process for producing a thiourea dioxide fluid by mixing thiourea and a peroxide, or thiourea, a peroxide and a reaction catalyst, or thiourea, a peroxide, a reaction catalyst and a chelating agent, in the absence or presence of pulp and a process for bleaching pulp by the use of the
5955180 Multi-layer film September 21, 1999
The invention relates to a multi-layer film comprising a layer (A) made of a polyamide (a), a layer (B) made of a mixed polyamide (b.sub.3) of a polyamide (b.sub.1) and an aliphatic polyamide (b.sub.2), a layer (C) made of an adhesive polyolefin (c.sub.1) or a mixed resin (c.sub.3) of an
5951914 Racemic compound and anti-ferroelectric liquid crystal composition September 14, 1999
A racemic compound of the formula (1) ##STR1## and an anti-ferroelectric liquid crystal composition consisting essentially of said racemic compound and one anti-ferroelectric liquid crystal compound of the formula (2) or a mixture of two or more compounds selected from anti-ferro
5948949 Process for producing 2,6-dimethylnaphthalene September 7, 1999
A process for producing highly pure 2,6-dimethylnaphthalene in a high yield from a mixture of dimethylnaphthalene isomers in the presence of a solvent, such as an aliphatic or alicyclic saturated hydrocarbon. Highly pure 2,6-dimethylnaphthalene can be produced steadily for a long time by
5945504 Episulfide compound August 31, 1999
An episulfide which has an alicyclic, aromatic or heterocyclic skeleton and has two or more moieties represented by the formula ##STR1## wherein X is S or O, and S is in an amount of 50% or more, on the average, of the total of S and O constituting a three-membered ring. A cured
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