Mitsubishi Gas Chemical Company, Inc.

Sekisui Chemical Co., Ltd.

Hiroshi Ogawa

Kazuo Tanaka

Atsushi Okoshi

Shinichi Nagao

Mitsuhide Nogami

Masashi Yabuno

Masato Inari

Masaru Heishi

Fumiya Zaima

Takao Kawaki

Katsushige Hayashi

Yuh Miyauchi

Toshio Watanabe

Tatsuyuki Kumano

Ikutaro Kuzuhara

Hiroshi Machida

Fumio Ohkoshi

Masashi Kanoh

Seiji Adachi

Etsuo Urabe

Atsushi Ohkoshi

Ikutraro Maruki

Ikutaro Maruki

Satoshi Ueno

A method for manufacturing a secondary battery having a film package by covering upper and lower sides of a laminate structure constituting a battery with a pair of film materials respectively and bonding the film materials together sequentially in a process direction from one end of the film materials to the other, the method including overlapping the film materials such that the laminate structure is sandwiched therebetween, and sealing one end of the overlapping part of the films, the one end being located at an upstream of the process direction, and bonding the overlapped film materials together at one or each of side portions thereof extending along the process direction sequentially in the process direction, while pressing a middle portion of the overlapped film materials sequentially in the process direction to thereby degas an internal space between the film materials, the middle portion being located between the side portions.

Method for manufacturing secondary battery

A sheet-laminated lithium ion secondary battery comprising: a membrane electrode assembly which comprises a cathode sheet comprising a cathode current collector having formed thereon a cathode active material layer, and an anode sheet comprising an anode current collector having formed thereon an anode active material layer, the cathode sheet and the anode sheet being laminated through a separator; and a sheet outer casing having accommodated therein the membrane electrode assembly, wherein, in the membrane electrode assembly, a sheet thermoplastic resin layer is inserted as at least one of an interlayer between the cathode sheet and the separator, and an interlayer between the anode sheet and the separator.

Sheet-laminated lithium ion secondary battery and production method for sheet-laminated lithium ion secondary battery

A method for producing a laminate battery includes: forming a membrane electrode assembly having a multilayer structure including a positive electrode plate, a negative electrode plate and an electrolyte layer, the electrolyte layer being provided between the positive electrode plate and the negative electrode plate, a tab attachment step including joining terminal tabs to end portions of the positive electrode plate and the negative electrode plate of the membrane electrode assembly on an outer packaging material, and covering the membrane electrode assembly with the outer packaging material. Each terminal tab is joined by bending at least a part of the end portion of the outer packaging material in a direction opposite to the membrane electrode assembly, and then joining the terminal tab to the positive electrode plate or the negative electrode plate at a portion corresponding to the bent part of the end portion of the outer packaging material.

Method for producing laminate battery, apparatus for producing laminate battery, and laminate battery

To provide a method of purifying 2,7-dimethylnaphthalene comprising the step of bringing a raw oil containing a mixture of 1,7-dimethylnaphthalene and 2,7-dimethylnaphthalene together with a developing solvent into contact with L-type zeolite to thereby effect adsorption of 1,7-dimethylnaphthalene.

Method of purifying 2,7-dimethylnaphthalene

Use of mordenite zeolite and zeolite Y as adsorbents enables a dimethylnaphthalene isomer mixture to be efficiently separated. A feedstock oil containing a dimethylnaphthalene isomer mixture including an &#x3b1;,&#x3b1;-isomer, an &#x3b1;,&#x3b2;-isomer, and a &#x3b2;,&#x3b2;-isomer is passed through an adsorbent layer (A) including mordenite zeolite together with a developing solvent. Subsequently, a liquid discharged from the adsorbent layer (A) is passed through an adsorbent layer (B) including zeolite Y. An eluent is passed through the adsorbent layer (B). The solvent is removed from the resultant eluate to obtain the &#x3b1;,&#x3b2;-isomer of dimethylnaphthalene. Similarly, the &#x3b2;,&#x3b2;-isomer of dimethylnaphthalene is obtained from the adsorbent layer (A).

Method of separating dimethylnaphthalene isomers

A method of producing pyromellitic dianhydride. The method includes a step of heating a crude pyromellitic acid in the absence of acetic anhydride to convert a part of pyromellitic acid to pyromellitic anhydride, and a subsequent step of heating the resultant mixture in the presence of acetic anhydride to complete the anhydrization of pyromellitic acid. The pyromellitic dianhydride by the method contains little pyromellitic monoanhydride and other monoanhydrides derived from impurities and is less discolored. The pyromellitic dianhydride has particle properties not causing plugging, etc. during its transportation, storage and use.

Production method of highly pure pyromellitic dianhydride

A process for producing pyromellitic acid which comprises step A for oxidizing durene, thereby obtaining a reaction mixture comprising trimethyl benzoic acid, trimethyl benzyl alcohol and trimethyl benzaldehyde, step B for separating trimethyl benzoic acid, trimethyl benzaldehyde and trimethyl benzyl alcohol from the reaction mixture obtained in step A, and step C for oxidizing trimethyl benzoic acid and/or trimethyl benzaldehyde separated in step B, thereby obtaining pyromellitic acid.

Process for producing pyromellitic acid

In a method of producing pyromellitic acid by liquid-phase oxidizing 2,4,5-trimethylbenzaldehyde in a water solvent with molecular oxygen, a recrystallization mother liquor separated in a recrystallization step is recycled to the oxidation step after a part of the water solvent is removed. With this method, the loss of pyromellitic acid and the oxidation catalyst can be minimized and the burden of discharging the waste water is reduced without lowering the efficiency of the liquid-phase oxidation reaction.

Production method of pyromellitic acid and pyromellitic anhydride

A process for producing pyromellitic acid which comprises oxidizing 2,4,5-trimethylbenzaldehyde and/or its oxidized derivative in the presence of a catalyst containing iron, manganese and bromine, or additionally containing zirconium or cerium continuously or semi-continuously using aqueous acetic acid solvent and 0.05-2% by weight of bromide ion. The catalyst used in the present invention has high activity, and the catalyst solution has low corrosive because the reaction is performed at low bromide concentration by using a solvent of aqueous acetic acid. So pyromellitic acid is produced industrially advantageously in high yield continuously or semi-continuously which has been a major difficulty up to now.

A process for producing trimellitic acid which comprises step A for oxidizing pseudocumene, thereby obtaining a reaction mixture comprising dimethyl benzoic acid, dimethyl benzyl alcohol, and dimethyl benzaldehyde, step B for separating dimethyl benzoic acid, dimethyl benzyl alcohol and dimethyl benzaldehyde from the reaction mixture obtained in step A, step C for oxidizing dimethyl benzyl alcohol separated in step B, thereby obtaining dimethyl benzoic acid and dimethyl benzyl aldehyde and then feeding dimethyl benzoic acid and dimethyl benzyl aldehyde thus obtained to step B, and step D for oxidizing dimethyl benzoic acid and/or dimethyl benzaldehyde separated in step B, thereby obtaining trimellitic acid.

Process for producing trimellitic acid

What is disclosed is a process for producing &egr;-caprolactone which comprises removing impurities by distillation from a reaction mixture obtained by co-oxidation of cyclohexanone and aldehyde, wherein &egr;-caprolactone separated from a purifying column is contacted with oxygen containing gas in the presence of cobalt. High boiling point components are removed to give an acid value of lower than 0.15 mgKOH/g. Thereby, a high quality &egr;-caprolactone providing improved polymer appearance is produced advantageously on an industrial scale without repeated purifying distillations or without using expensive stabilizer or adsorbent for the improvement of color.

Process for producing &egr;-caprolactone

A process for producing a polycarboxylic acid which comprises performing liquid phase oxidation of polyalkyl-substituted aromatic aldehyde and/or oxide derivative of polyalkyl-substituted aromatic aldehyde as raw material for oxidation with molecular oxygen at two stages in water solvent in the presence of a catalyst comprising bromine or both bromine and a heavy metal(s) at a temperature of 180 to 280 &deg; C., thereby producing trimellitic acid or pyromellitic acid, wherein said liquid phase oxidation is performed in a continuous operation at the first stage and in a continuous operation or in a batch operation at the second stage and a total amount of bromine in said catalyst is divided to add separately at each the first stage and the second stage.

Process for producing aromatic polycarboxylic acid

A process for producing trimellitic anhydride which comprises performing liquid phase oxidation of pseudocumene containing 5% by weight or above of dimethyl bezaldehyde as a raw material for oxidation with air in aliphatic monocarboxylic acid having 1 to 5 carbon atoms as a solvent in the presence of a catalyst comprising both each metal of cobalt, manganese and zirconium and bromine to obtain trimellitic acid and then heat dehydrating trimellitic acid thus obtained or heat treating trimellitic acid thus obtained in the presence of a catalyst comprising 10 ppm or above of Ni thereby producing trimellitic anhydride.

Process for producing trimellitic anhydride

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 amount of cobalt and manganese in the catalyst is 50 to 300 mg atom per 1 g mol of 2,6-dimethylnaphthalene, a ratio by g atom of manganese to cobalt in the catalyst is 20:1 to 4:1, and the oxidation is conducted at a temperature of 200 to 250.degree. C.; and a process as described above, wherein a mother liquor which is obtained from a slurry of a product of the oxidation via a step of solid-liquid separation is recyled to a step of oxidation after heat treatment at a temperature of 150.degree. C. or higher. In accordance with the processes, accumulation of substances which affect the oxidation adversely is prevented. Moreover, a large fraction of a mother liquor of oxidation can be recycled without decrease in the yield of the reaction, and the catalyst components and the solvent components in the mother liquor of oxidation can be utilized efficiently.

Process for producing 2,6-naphthalenedicarboxylic acid

A process for producing purified .epsilon.-caprolactone from an .epsilon.-caprolactone-containing reaction product produced by the oxidation of cyclohexanone comprising subjecting the .epsilon.-caprolactone-containing reaction product to an alkali-treatment in the presence of an inert gas atmosphere or to a heat treatment in the presence of an inert gas atmosphere or to a combined alkali-treatment and heat treatment, and distilling the treated reaction product.

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Kurashiki, Japan

Hiroshi Ogawa