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1. 发明专利

JPH10139746A PRODUCTION OF MALEAMIC ACID 失效
公开(公告)号：JPH10139746A
公开(公告)日：1998-05-26
申请号：JP29864096
申请日：1996-11-11
申请人： MITSUBISHI GAS CHEMICAL CO
发明人： SOMEYA MASAO , ARAKAWA SATOSHI
IPC分类号： C07C231/02 , C07C233/09
摘要： PROBLEM TO BE SOLVED: To obtain the subject compound useful as a raw material for a polyaspartic acid by reacting maleic anhydride with ammonia. SOLUTION: This method for producing maleamic acid comprises reacting maleic acid with ammonia (its mixture gas with an inert gas such as nitrogen or argon) in an inactive solvent (one or mixture of pentane, hexane, etc.,) in an amount of 1 or more weight times (preferably >=2 weight times) that of the produced maleamic acid at >=20 deg.C (preferably 40-80 deg.C), while the concentration of the maleic acid is maintained at >10wt.%, and subsequently ageing the reaction at 40-80 deg.C for 0.1-3hr. preferably after the supply of the ammonia. Thus, the highly pure maleamic acid can efficiently be obtained, while the by-production of cohesive maleamic acid ammonium salt is inhibited in the produced slurry.

2. 发明专利

JPH0262849A PRODUCTION OF AROMATIC CARBOXYLIC ACID ESTER 失效
公开(公告)号：JPH0262849A
公开(公告)日：1990-03-02
申请号：JP21234688
申请日：1988-08-29
申请人： MITSUBISHI GAS CHEMICAL CO
发明人： KIZAKI SHOJI , ARAKAWA SATOSHI , NAKAYAMA MITSUYOSHI
IPC分类号： B01J31/02 , B01J31/26 , C07B61/00 , C07C67/08 , C07C69/76 , C07C69/80
摘要： PURPOSE:To obtain the title compound useful as a raw material for drugs, etc., and a tacky agent, etc., readily and in high quality free from admixture of by-products in reacting an aromatic carboxylic acid with an aliphatic alcohol by adding a specific esterifying catalyst to the reaction system. CONSTITUTION:Methyl titanate or a polymer thereof supported on silica magnesia carrier is used as a catalyst, an aromatic carboxylic acid or an acid anhydride (e. g., benzoic acid or benzophenonetetracarboxylic acid anhydride) is reacted with an aliphatic alcohol (e. g., methanol) in the molar ratio of carboxyl group of aromatic carboxylic acid to alcohol of preferably 1-1.5 and using 0.05-2wt.%, especially 0.1-1wt.% based on the carboxylic acid of the catalyst under normal pressure or under reduced pressure at 180-250 deg.C to give the aimed compound. The amount of methyl titanate supported on the silica magnesia carrier is preferably 5-20wt.% based on the carrier.

3. 发明专利

JPH11130762A PRODUCTION OF CIS-EPOXYSUCCINIC SALT 失效
公开(公告)号：JPH11130762A
公开(公告)日：1999-05-18
申请号：JP29748497
申请日：1997-10-29
申请人： MITSUBISHI GAS CHEMICAL CO
发明人： ARAKAWA SATOSHI , TSUNODA MINORU , ONOZAWA TAKASHI , SHIMIZU YUKARI
IPC分类号： C07D301/12 , B01J23/24 , C07B61/00 , C07D303/48
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a cis-epoxysuccinc salt in high yield by using maleic anhydride and hydrogen peroxide as raw materials, efficiently separating and recovering a catalyst and repetitively using the recovered catalyst. SOLUTION: This method for producing a cis-epoxysuccinic salt comprises reacting maleic anhydride or maleic acid or its salt with hydrogen peroxide in the presence of a tungsten or a molybdenum compound catalyst, producing a cis-epoxysuccinate and then adsorbing and then separating the catalyst contained in the reactional liquid with a chelating resin having chelating groups represented by the formula [R denotes hydrogen atoms or a 1-5C alkyl group; (n) denotes an integer of 1-6].

4. 发明专利

JPS6131047B2 失效
公开(公告)号：JPS6131047B2
公开(公告)日：1986-07-17
申请号：JP9417281
申请日：1981-06-18
申请人： MITSUBISHI GAS CHEMICAL CO
发明人： ARAKAWA SATOSHI
IPC分类号： C01B17/66

5. 发明专利

JPS5891004A PRODUCTION OF DITHIONITE 失效
公开(公告)号：JPS5891004A
公开(公告)日：1983-05-30
申请号：JP18971081
申请日：1981-11-26
申请人： MITSUBISHI GAS CHEMICAL CO
发明人： ARAKAWA SATOSHI
IPC分类号： C01B17/66
摘要： PURPOSE:To permit the reuse of the washing liquid of a titled salt obtd. by allowing formic acid compds., alkali compds. and SO2 to react in a water-org. solvent by adding specific epoxy compds. to said liquid. CONSTITUTION:Formic acid compds., alkali compds., and SO2 are allowed to react in a water-org. solvent to form dithionic anhydride. The reacting liquid is cooled to separate the crystals of said salt and the mother liquor stuck on the crystals is washed with an org. solvent. The crystals are dried. >=1 kinds of ethylene oxide and propylene oxide are added to the washing liquid. Since these compds. react selectively with good reaction percentage with the thiosulfate in the washing liquid, these compds. are converted to harmless materials which make no contribution at all to the interference of formation and the decomposition of dithionite. Thus, this liquid is reusable for production of dithionite and the product having high purity is obtained in high yields.

6. 发明专利

JPS5879805A PREPARATION OF DITHIONITE 失效
公开(公告)号：JPS5879805A
公开(公告)日：1983-05-13
申请号：JP17923081
申请日：1981-11-09
申请人： MITSUBISHI GAS CHEMICAL CO
发明人： ARAKAWA SATOSHI
IPC分类号： C01B17/66
摘要： PURPOSE:To prepare a high-purity product in high yield, by adding an epoxy compound and an acidic substance to a filtrate from which crystal of precipitated dithionite is separated or to a washed solution of the crystal, reusing it for the preparation of the titled salt. CONSTITUTION:HCOONa or HCOOH is reacted with an alkalifying agent such as NaOH, etc. and SO2 in water-organic solvent to synthesize Na2S2O4 and the reaction solution is cooled to precipitate the crystal of Na2SO4. An epoxy compound is added to a filtrate from which the crystal is separated or a washed solution of the crystal, Na2S2O3 in the solution is converted into a harmless substance, and an acidic substance is added to the solution so that the precipitation of the crystal taking place in the cooling is prevented or the precipitated crystal is dissolved. The solution having an extremely small amount of crystal thus obtained is circulated for the preparation of Na2S2O4 and reused.

7. 发明专利

JPH11165074A PRODUCTION OF TITANOSILICATE-CARRYING CATALYST AND PRODUCTION OF ORGANIC COMPOUND USING THE SAME BY HYDROGEN PEROXIDE 失效
公开(公告)号：JPH11165074A
公开(公告)日：1999-06-22
申请号：JP33020297
申请日：1997-12-01
申请人： MITSUBISHI GAS CHEMICAL CO
发明人： OKAMOTO TAKANOBU , ARAKAWA SATOSHI
IPC分类号： C07D301/12 , B01J29/89 , C07B61/00 , C07C37/60 , C07C39/08 , C07C251/32 , C07D303/04
摘要： PROBLEM TO BE SOLVED: To obtain a titanosilicate-carrying catalyst exhibiting activity to the epoxidation or the like of an olefin using hydrogen peroxide as an oxidizing agent and excellent in handling property or the like by forming a silica-titania dry gel on a carrier, treating it with pressurized steam to crystallize and firing. SOLUTION: The titanosilicate is crystallized on the carrier by forming the silica-titania dry gel containing a silicon compound, a titanium compound and a tetraalkylammonium compound on the carrier and next, treating it with the pressurized steam and is fired. As the silicon compound, a tetraalkyl orthosilicate or a colloidal silica or the like is used. As the titanium compound, a tetraalkyl orthotitanate or a hydrolyzable halogenated titanium compound or the like is used. As the tetraalkylammonium compound used as a forming material, a tetraalkylammonium hydroxide, tetraalkylammonium halide and the like are mentioned.

8. 发明专利

JPH10158198A DECOMPOSITION OF ORGANIC PEROXIDE 失效
公开(公告)号：JPH10158198A
公开(公告)日：1998-06-16
申请号：JP31956596
申请日：1996-11-29
申请人： MITSUBISHI GAS CHEMICAL CO
发明人： SHIMIZU YUKARI , ARAKAWA SATOSHI , KONDO OSAMU , OKAMOTO TAKANOBU
IPC分类号： B01J23/42 , B01J23/44 , C07B37/06
摘要： PROBLEM TO BE SOLVED: To easily decompose an organic peroxide while suppressing the deterioration of a catalyst over a long period by using a specific solid catalyst. SOLUTION: (A) A solid catalyst produced by supporting platinum or palladium on a solid carrier (preferably silica or activated carbon) is brought into contact with (B) a solution containing an organic peroxide. The component B is preferably at least one compound selected form the group consisting of hydroperoxide, dialkyl peroxide, ketone peroxide, percarboxylic acid, peracid ester and diacyl peroxide and the decomposition reaction is preferably carried out e.g. by a fixed bed process under stirring for 1min to 10hr.

9. 发明专利

JPS6018603B2 失效
公开(公告)号：JPS6018603B2
公开(公告)日：1985-05-11
申请号：JP17923081
申请日：1981-11-09
申请人： MITSUBISHI GAS CHEMICAL CO
发明人： ARAKAWA SATOSHI
IPC分类号： C01B17/66

10. 发明专利

JPS5941925B2 JPS5941925B2 - 失效
公开(公告)号：JPS5941925B2
公开(公告)日：1984-10-11
申请号：JP2843280
申请日：1980-03-06
申请人： Mitsubishi Gas Chemical Co
发明人： ARAKAWA SATOSHI
IPC分类号： C01B17/66
CPC分类号： C01B17/66

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