Patents Assigned to Mitsubishi Chemical Industries Ltd.
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Patent number: 4305920Abstract: A fine solid titanium trichloride is used as a catalyst for a polymerization of an .alpha.-olefin. The solid titanium trichloride is produced by precipitating it at lower than 150.degree. C. from a liquid titanium trichloride complex in the presence of an ester having the formula ##STR1## wherein R.sup.1 and R.sup.2 respectively represent a hydrocarbon moiety and total carbon atoms of R.sup.1 and R.sup.2 are 10 or more.Type: GrantFiled: January 30, 1980Date of Patent: December 15, 1981Assignee: Mitsubishi Chemical Industries, Ltd.Inventors: Masayoshi Hasuo, Yoshinori Suga, Yoshiteru Kobayashi, Kazuhisa Kojima, Masatoshi Suzuki
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Patent number: 4302243Abstract: In a process for producing tantalum concentrates from ores containing tantalum oxides, tantalic acid or its salts together with rutile type titanium dioxide in mixed crystals, the ores are treated in a sulfuric acid of a concentration not lower than 50% by weight with heating at a temperature from 200.degree. C. to the boiling point of said sulfuric acid, and then the above-treated products are treated with a reducing agent in an aqueous solution of sulfuric acid of a concentration lower than 50% by weight to dissolve the titanium component to thereby obtain tantalum concentrates as solid products.Type: GrantFiled: June 11, 1980Date of Patent: November 24, 1981Assignee: Mitsubishi Chemical Industries, Ltd.Inventors: Akio Tamaru, Minoru Kitsunai
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Patent number: 4298561Abstract: An aqueous slurry of calcium silicate hydrate which is formed by heating a siliceous source and a calcareous source in water to react them and which has the specific property is shaped with a press filter molding and cured by a steam curing under steam pressure to cause a transformation of the calcium silicate hydrate whereby a calcium silicate shaped product having low bulk density and high mechanical strength is obtained. The calcium silicate shaped product is suitable as a lagging product or a heat insulator.Type: GrantFiled: November 21, 1979Date of Patent: November 3, 1981Assignee: Mitsubishi Chemical Industries, Ltd.Inventors: Mitsuo Uchida, Yasuo Oguri, Junji Saito, Tsukasa Kawahara
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Patent number: 4298518Abstract: A polyamide resin composition comprises melamine cyanurate with or without a copper compound, an alkali metal halide, a tin compound, a bisamide compound or a bisureido compound.Type: GrantFiled: August 24, 1977Date of Patent: November 3, 1981Assignee: Mitsubishi Chemical Industries, Ltd.Inventors: Yasuhiro Ohmura, Yukinobu Murakami, Ryoji Hidaka
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Patent number: 4292070Abstract: N-substituted-3,4,5,6-tetrahydrophthalimides in which the N-substituted group is a phenyl group having a substituted-oxy group at 3-position and a chlorine or bromine atom at 4-position and chlorine or hydrogen atom at 2-position have excellent herbicidal effect and are used as selective herbicides in a plant culturing.Type: GrantFiled: March 24, 1980Date of Patent: September 29, 1981Assignee: Mitsubishi Chemical Industries, Ltd.Inventors: Osamu Wakabayashi, Kuni Matsuya, Hiroki Ohta, Tetsuo Jikihara, Seiichi Suzuki
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Patent number: 4292448Abstract: A process for the hydroformylation of an olefin, comprising reacting the olefin with carbon monoxide and hydrogen in a catalyst liquid containing a Group VIII noble metal-triarylphosphine complex catalyst, excess triarylphosphine and a reaction solvent to form an aldehyde, characterized by withdrawing a part of the catalyst liquid as a spent catalyst liquid, subjecting the spent catalyst liquid to crystallization, recovering crystallized triarylphosphine from the spent catalyst liquid, and recirculating the recovered triarylphosphine into the reaction zone.Type: GrantFiled: April 22, 1980Date of Patent: September 29, 1981Assignee: Mitsubishi Chemical Industries Ltd.Inventors: Yoshitoshi Tsunoda, Shimpei Tomita, Chihiro Miyazawa
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Patent number: 4286101Abstract: Preparation of terephthalic acid by oxidizing p-xylene with molecular oxygen in an acetic acid solvent in the presence of a catalyst containing at least one heavy metal and bromine. Preparation of terephthalic acid of high purity accompanied by low level of combustion of the acetic acid solvent can be achieved by(i) introducing p-xylene and molecular oxygen into a first reaction zone kept at a temperature of 180.degree.-230.degree. C. to oxidize at least 95% by weight of the p-xylene into terephthalic acid;(ii) introducing the reaction mixture obtained from the first reaction zone into a second reaction zone kept at a temperature of 0.degree.-50.degree. C. below the temperature of the first reaction zone in which the reaction mixture is subjected to post-oxidation with molecular oxygen without supplying p-xylene; and(iii) introducing the reaction mixture obtained from the second reaction zone into a third reaction zone kept at a temperature of at least 230.degree. C.Type: GrantFiled: October 12, 1979Date of Patent: August 25, 1981Assignee: Mitsubishi Chemical Industries Ltd.Inventors: Hiroshi Hashizume, Sigeki Harada
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Patent number: 4285789Abstract: In a cationic electrodeposition process for coating an electric conductive substrate as a cathode with an electrodeposition process-coating composition containing a resin; an improvement characterized in that said resin is a resin having hydroxyl groups, tertiary amino groups, quaternary ammonium groups and blocked isocyanate groups which are reactive with hydroxyl group at an elevated temperature which is obtained by reacting(a) a polyisocyanate;(b) a polyhydroxyl compound;(c) a hydroxyl compound having tertiary amino group;(d) a hydroxyl compound having quaternary ammonium group; and(e) a monofunctional blocking agent.The coated layer has excellent anticorrosive characteristic, mechanical characteristics and the coating composition has excellent stability for aging.Type: GrantFiled: February 7, 1980Date of Patent: August 25, 1981Assignee: Mitsubishi Chemical Industries, Ltd.Inventors: Yoshimichi Kobayashi, Yukio Tsuge, Susumu Hirako, Hideaki Kiniwa
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Patent number: 4268671Abstract: Fluorescent dyes having the formula ##STR1## wherein R.sup.1 represents hydrogen, (C.sub.1 -C.sub.8) alkyl, trifluoromethyl, (C.sub.1 -C.sub.4) alkoxycarbonyl, (C.sub.1 -C.sub.4) alkoxycarbonyl (C.sub.1 -C.sub.4) alkyl, phenyl, or aralkyl group; R.sup.2 represents hydrogen, cyano, acyl, (C.sub.1 -C.sub.8) alkoxycarbonyl, (C.sub.1 -C.sub.4) alkoxy (C.sub.1 -C.sub.4) alkoxycarbonyl, (C.sub.1 -C.sub.4) alkoxy (C.sub.1 -C.sub.4) alkoxy (C.sub.1 -C.sub.4) alkoxycarbonyl, di(C.sub.1 -C.sub.4) alkylamino (C.sub.1 -C.sub.4) alkoxycarbonyl, cyclohexyloxycarbonyl, aryloxycarbonyl, benzyloxycarbonyl, tetrahydrofurfuryloxycarbonyl, carbamoyl, N-(C.sub.1 -C.sub.4) alkylcarbamoyl, N,N-di(C.sub.1 -C.sub.4)alkylcarbamoyl, N-phenylcarbamoyl, or morpholinocarbonyl group; and R.sup.3 and R.sup.4 can be the same or different and each represents hydrogen, (C.sub.1 -C.sub.8) alkyl, (C.sub.1 -C.sub.4) alkoxy(C.sub.1 -C.sub.4) alkyl, aralkyl or phenyl group which can be substituted by halogen atoms, (C.sub.1 -C.sub.Type: GrantFiled: April 13, 1978Date of Patent: May 19, 1981Assignee: Mitsubishi Chemical Industries Ltd.Inventors: Seiichi Imahori, Yukichi Murata, Syuichi Maeda, Sumio Suzuki
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Patent number: 4267260Abstract: A developer for use with a lithographic photo-sensitive medium of a polyether resin, comprising a compound of the formula:RO--CH.sub.2 --CH.sub.2 --O--.sub.k R.sup.1orROCH.sub.2 CH.sub.2 OR.sup.2(wherein R represents an alkyl group with carbon number of 1 to 4, R.sup.1 represents hydrogen or an acyl group, R.sup.2 represents an acyl group with a carbon number of 2 to 5, and k represents an integer of 2 to 3).Type: GrantFiled: July 19, 1976Date of Patent: May 12, 1981Assignee: Mitsubishi Chemical Industries, Ltd.Inventors: Konoe Miura, Chihiro Eguchi, Yoshihiro Takahashi, Akinobu Oshima, Kazuo Torige, Shinichi Bunya
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Patent number: 4265816Abstract: An alkali metal salt of a 3-(17.beta.-hydroxyandrosten-3-one 3-acetal-17.alpha.-yl)propiolic acid which is useful as an intermediate in the preparation of 3-(3-oxo-7.alpha.-acetylthio-17.beta.-hydroxyandrost-4-en-17.alpha.-yl)-pr opiolactone (spironolactone) as antialdosteronic diuretics and hypotensive agents is prepared by reacting a 17.beta.-hydroxypregnen-20-yn-3-one 3-acetal (I) with an alkali metal dimsyl (II) to give an alkali metal salt of the 17.beta.-hydroxypregnen-20-yn-3-one 3-acetal (III), and reacting the compound (III) with carbon dioxide followed by hydrolysis.Type: GrantFiled: May 1, 1980Date of Patent: May 5, 1981Assignee: Mitsubishi Chemical Industries, Ltd.Inventors: Hiromi Okushima, Shinichiro Fujimori, Rikizo Furuya, Shuzo Hayakawa
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Patent number: 4260680Abstract: A method and apparatus for measuring the glucose content in a liquid sample by passing the sample consecutively through a column of at least one ion exchange resin and a column of immobilized glucose oxidase and then determining the amount of hydrogen peroxide produced by contacting the sample with glucose oxidase.Type: GrantFiled: October 6, 1978Date of Patent: April 7, 1981Assignee: Mitsubishi Chemical Industries, Ltd.Inventors: Kozo Muramatsu, Kuniko Samizo
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Patent number: 4260731Abstract: An aromatic polyester-polycarbonate resin which comprises a polymer material composed of repeating units of structures I-III: ##STR1## wherein X is a divalent organic radical and the divalent aromatic entities in structures I, II and III may be substituted by hydrocarbon residues.Type: GrantFiled: August 20, 1979Date of Patent: April 7, 1981Assignee: Mitsubishi Chemical Industries, Ltd.Inventors: Hajime Mori, Katsuhisa Kohyama, Katsuhiko Nakamura, Katsuyuki Sakata
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Patent number: 4258124Abstract: A photosensitive composition comprising a polyester formed from dicarboxylic acid units of the formula: ##STR1## wherein 1, m, n, p and q are independently an integer of 0 or 1 with at least one of 1, m and n having a value of 1, X and Y are independently hydrogen or X and Y are combined to form an alkylene group containing 1-4 carbon atoms; and said polyester containing alkylene glycol units of the formula: --O--(RO--.sub.r wherein R is alkylene of 2-4 carbon atoms and r is an integer of 2-4 and said polyester also containing hydrogenated bisphenol units represented by the formula: ##STR2## wherein R.sup.1 and R.sup.2 independently are hydrogen or an alkyl group of 1-6 carbon atoms.Type: GrantFiled: September 7, 1979Date of Patent: March 24, 1981Assignee: Mitsubishi Chemical Industries Ltd.Inventors: Shigeki Shimizu, Akinobu Oshima
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Patent number: 4258161Abstract: Propylene is polymerized in the presence of a catalytic system of the type which comprises a solid titanium trichloride-based complex serving as a catalyst, said complex having an atomic ratio of aluminum to titanium in the range of below 0.15:1 and containing a complexing agent, and an organic aluminium compound of the general formula, AlR.sub.n.sup.1 Cl.sub.3-n wherein R.sup.1 represents an n-propyl group or an n-hexyl group and n is a value of 1.95-2.10. The catalytic system may further comprise an electron-donor compound as a third catalytic component.Type: GrantFiled: January 22, 1979Date of Patent: March 24, 1981Assignee: Mitsubishi Chemical Industries Ltd.Inventors: Genjiro Kakogawa, Masayoshi Hasuo, Yoshinori Suga, Hisashi Kitada, Yumito Uehara
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Patent number: 4256766Abstract: A pharmaceutical composition comprising an immunosuppressively effective amount of N-(p-hydroxyphenyl)-L-glutamine or the pharmaceutically acceptable acid addition salt thereof and a pharmaceutically acceptable adjuvant.Type: GrantFiled: March 19, 1979Date of Patent: March 17, 1981Assignee: Mitsubishi Chemical Industries, LtdInventors: Takenori Mori, Haruhisa Shirahama, Tadashi Kurokawa
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Patent number: 4244882Abstract: Full esters of polyols selected from pentaerythritol and polypentaerythritols are continuously produced by (i) continuously introducing a solution of the polyols in pyridine bases, olefins having at least 4 carbon atoms in an amount of at least 0.4 equivalent per 1.0 equivalent of the hydroxyl group in the polyols, a catalyst containing cobalt carbonyls and pyridine bases, and carbon monoxide, into a reaction zone from one end thereof in such an amount of the pyridine bases as is within the range of from 40 to 70% by weight based on the total amount of the pyridine bases, the polyols and the olefins; (ii) introducing an additional amount of the olefins into at least one middle portion of the reaction zone, and; (iii) continuously withdrawing the resultant reaction mixture from the other end of the reaction zone.Type: GrantFiled: June 18, 1979Date of Patent: January 13, 1981Assignees: The Lion Fat & Oil Co., Ltd., Mitsubishi Chemical Industries Ltd.Inventors: Hiroshi Isa, Kenji Karube, Junichi Nakayama
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Patent number: 4239793Abstract: A gas separation membrane comprises a main component of a mixture of a polyvinyltriorganosilane and an organopolysiloxane.The gas separation membrane has a dense layer having a gas selective permeability and a thickness of 0.01 to 10.mu. and a porous layer having open pores and a thickness of greater than 10.mu..Type: GrantFiled: October 11, 1978Date of Patent: December 16, 1980Assignee: Mitsubishi Chemical Industries Ltd.Inventors: Junichi Matsuura, Yukio Yamaguchi
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Patent number: 4239882Abstract: A polyester is produced in an improved process by esterification or interesterification of an aromatic dicarboxylic acid or an alkyl ester thereof with 1,4-butanediol followed by polycondensation of the resulting ester characterized in reusing the 1,4-dibutanediol mixture distilled in the polycondensation step without purification as a starting material for production of more polyester.Type: GrantFiled: September 3, 1975Date of Patent: December 16, 1980Assignee: Mitsubishi Chemical Industries Ltd.Inventors: Tsuneo Kimura, Katsuhisa Kohyama, Takehiro Okada, Katsuyuki Sakata
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Patent number: 4239878Abstract: A cationic electrodeposition-coating resin is prepared by reacting(1) a polyisocyanate with(2) a polyol and(3) a monofunctional blocking agent at a molar ratio of excess of isocyanate groups to total of hydroxyl groups of the polyol and functional groups of the monofunctional blocking agent to obtain an intermediate (A) having isocyanate groups; and reacting a tertiary amine having at least two hydroxyl groups with the intermediate (A) at a molar ratio of excess of hydroxyl groups of the tertiary amine to isocyanate groups of the intermediate (A); and cationizing the resulting reaction product (B).Type: GrantFiled: May 10, 1979Date of Patent: December 16, 1980Assignee: Mitsubishi Chemical Industries Ltd.Inventors: Yoshimichi Kobayashi, Yukio Tsuge, Susumu Hirako