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51. 发明专利

JPH01290511A PRODUCTION OF CRYSTALLINE SILICON NITRIDE 失效
公开(公告)号：JPH01290511A
公开(公告)日：1989-11-22
申请号：JP11836088
申请日：1988-05-17
申请人： MITSUI TOATSU CHEMICALS
发明人： DOMOTO KAZUMI , TANAKA MASAO , WAKIMURA KAZUO , HIAI ATSUHIKO
IPC分类号： C01B21/068 , C04B35/584
摘要： PURPOSE:To obtain crystalline silicon nitride of high alpha-form crystal content having uniform particle shape by heating amorphous silicon nitride obtd. by the vapor phase decomposition reaction of monosilane with a specified amt. of ammonia at a specified temp. further in NH3 atmosphere. CONSTITUTION:A gaseous reaction mixture consisting of monosilane and 10-30 times mole ammonia is subjected to vapor phase decomposition reaction at 600-1,000 deg.C. If the molar ratio of NH3 to the monosilane is 30 ties, no advantageous result is obtd. Further, if the reaction temp. is 1,000 deg.C, the particle shape becomes ununiform due to progress of partial crystallization together with the synthesis of the crystalline silicon nitride, causing uneconomical result of the synthesis.

52. 发明专利

JPS6244537B2 失效
公开(公告)号：JPS6244537B2
公开(公告)日：1987-09-21
申请号：JP11104779
申请日：1979-09-01
申请人： MITSUI TOATSU CHEMICALS
发明人： TOYODA YOSHIAKI , SUGAWARA HARUSHIGE , WAKIMURA KAZUO , HIAI ATSUHIKO
IPC分类号： C07C69/16 , B01J27/00 , B01J27/20 , C07B61/00 , C07C67/26

53. 发明专利

JPS6217004A PREPARATION OF GERMANE 失效
公开(公告)号：JPS6217004A
公开(公告)日：1987-01-26
申请号：JP15238685
申请日：1985-07-12
申请人： MITSUI TOATSU CHEMICALS
发明人： HIAI ATSUHIKO , WAKIMURA KAZUO , TANAKA MASAO
IPC分类号： C01B6/06
摘要： PURPOSE:To prepare germanes having low content of by-product economically advantageously by prepg. germanes from halogenated germanes using a specified hydrogenating agent contg. alkyl aluminum monohalide. CONSTITUTION:In the preparation of germanes from halogenated germanes using a hydrogenating agent prepd. by adding alkyl aluminium halide sufficient to transform above 90mol% trialkyl aluminum to dialkyl aluminium monohalide to a mixture consisting of alkyl aluminium hydride and trialkyl aluminium. A hydrogenating agent prepd. to contain below 0.1wt% metallic Al basing on the amt. of alkyl aluminium hydride in the hydrogenating agent is used. Suitable halogenated germanes to be used are germanium tetrachloride, hexachloro digermance, octachloro trigermane, etc.

54. 发明专利

JPS61205614A PRODUCTION OF HEXACHLORODISILANE 失效
公开(公告)号：JPS61205614A
公开(公告)日：1986-09-11
申请号：JP4470185
申请日：1985-03-08
申请人： MITSUI TOATSU CHEMICALS
发明人： HIAI ATSUHIKO , WAKIMURA KAZUO , USE TADAHARU
IPC分类号： C01B33/107
摘要： PURPOSE:In producing hexachlorodisilane by lowering chlorosilane with chlorine in a fluidized bed, to prevent clogging in a device and to raise yield, by feeding separately chlorine and silicon tetrachloride as a fluidizing gas at a specific temperature reaction and using inert particles as a fluidizing medium. CONSTITUTION:Silicon tetrachloride is fed from the piping 1 to the evaporator 4. Silicon tetrachloride vapor is introduced from the piping 5 through a distribution plate at the lower part of the fluidized bed 6. The fluidized bed 6 is filled with inert particles (e.g., alumina passing 60 meshes) as a fluidizing medium. A chloropolysilane (SinCl2n+2, n>=3) and chlorine of raw materials are fed from the piping 2, and the piping 3, respectively, through the lower side of the fluidized bed to the fluidized bed. Silicon tetrachloride used as a fluidizing gas is not premixed with chlorine and not fed to the fluidized bed, but they are separately fed to the fluidized bed, so clogging of a distribution plate of the fluidizing gas is prevented. Yield is raised by controlling the reaction temperature in the fluidized bed at 250-450 deg.C.

55. 发明专利

JPS60221301A NOVEL MANUFACTURE OF GERMANIUM HYDRIDE 失效
公开(公告)号：JPS60221301A
公开(公告)日：1985-11-06
申请号：JP7304484
申请日：1984-04-13
申请人： MITSUI TOATSU CHEMICALS
发明人： HIAI ATSUHIKO , WAKIMURA KAZUO , TANAKA MASAO
IPC分类号： C01B6/06 , C01B6/00 , C07F7/30
摘要： PURPOSE:To obtain high purity germanium hydride in a high yield by reducing a germanium halide with a mixture consisting of an alkyl aluminum hydride and trialkyl aluminum in a specified molar ratio. CONSTITUTION:A mixture consisting of 100mol alkyl aluminum hydride (a) such as diethyl aluminum hydride and 30-200mol trialkyl aluminum (b) such as triethyl aluminum is distilled to obtain a mixture contg. the component (b) by G to obtain germanium hydride while inhibiting the production of a germanium hydride halide, ethane, etc. as by-products. The reduction may be carried out in a reaction solvent which does not react with alkyl aluminum and does not form a complex. The solvent includes heptane.

56. 发明专利

JPH09286607A PRODUCTION OF NITROUS OXIDE 失效
公开(公告)号：JPH09286607A
公开(公告)日：1997-11-04
申请号：JP10512496
申请日：1996-04-25
申请人： MITSUI TOATSU CHEMICALS
发明人： NAKAMURA HIDEAKI , WAKIMURA KAZUO , FUJIWARA KENJI , KATO HIROSHI , YOSHINAGA SUSUMU
IPC分类号： A61M16/01 , C01B21/22
摘要： PROBLEM TO BE SOLVED: To provide a production method of a nitrous oxide capable of miniaturizing a separating device, low in freezing of the nitrous oxide and high in recovery rate at the time of separating the nitrous oxide, nitrogen and oxygen, etc., from a nitrous oxide-containing gas. SOLUTION: At the time of cooling and separating a reaction gas obtained by allowing ammonia to react with the oxygen under the presence of steam to a non-condensable gas such as nitrous oxide, nitrogen and oxygen and water, then cooling and separating the nitrous oxide from the non-condensable gas, the cooled and condenced nitrous oxide, nitrogen and oxygen are separated by introducing a refrigeration medium prepared so that a wt. ratio of a liq. and a gas of the refrigeration medium at an inlet of a heat exchanger may be 1:(0.05-20) to the heat exchanger by using a substance having -40 to -240 deg.C b.p. as the refrigeration medium.

57. 发明专利

JPH0827124A METHOD FOR IMPROVING PURITY OF MELAMINE CYANURATE 失效
公开(公告)号：JPH0827124A
公开(公告)日：1996-01-30
申请号：JP16717894
申请日：1994-07-19
申请人： MITSUI TOATSU CHEMICALS
发明人： NAKAMURA HIDEAKI , WAKIMURA KAZUO , KATO HIROSHI , YOSHINAGA SUSUMU
IPC分类号： C07D251/54
摘要： PURPOSE:To improve the purity of melamine cyanurate without carrying out the washing with water by further heating a crude product thereof obtained in the presence of water in obtaining the melamine cyanurate from melamine and cyanuric acid in the presence of water. CONSTITUTION:This method for improving the purity of melamine cyanurate is to heat a crude melamine cyanurate obtained by a method for producing the melamine cyanurate from melamine and cyanuric acid in the presence of water to 220-450 deg.C. If several kinds of impurities are simultaneously contained, they can be removed so far as substances capable of evaporating, subliming or decomposing at

58. 发明专利

JPH07188193A PRODUCTION OF MELAMINE CYANURATE 失效
公开(公告)号：JPH07188193A
公开(公告)日：1995-07-25
申请号：JP33200893
申请日：1993-12-27
申请人： MITSUI TOATSU CHEMICALS
发明人： NAKAMURA HIDEAKI , WAKIMURA KAZUO , KATO HIROSHI , YOSHINAGA SUSUMU
IPC分类号： C07D251/54
摘要： PURPOSE:To provide a method for economically producing high-purity melamine cyanurate, simplified in comparison with a conventional method. CONSTITUTION:The characteristic of this method for producing melamine cyanurate from melamine and cyanuric acid comprises adding

59. 发明专利

JPH07149738A GRANULAR MELAMINE CYANURATE AND ITS PRODUCTION 失效
公开(公告)号：JPH07149738A
公开(公告)日：1995-06-13
申请号：JP29881993
申请日：1993-11-30
申请人： MITSUI TOATSU CHEMICALS
发明人： WAKIMURA KAZUO , YOSHIYAMA TETSUO , KATO HIROSHI , IZUMI YURI
IPC分类号： C07D251/54
摘要： PURPOSE:To provide a method for producing granular melamine cyanurate in which the production process is simplified as compared with that of a conventional method and the melamine cyanurate having readily handleable properties is obtained. CONSTITUTION:The characteristic of this method for producing granular melamine cyanurate is to heat powdery melamine and powdery cyanuric acid in the substantial absence of a liquid medium at 250-500 deg.C. The granular melamine cyanurate is obtained by granulating a mixture of both powders and then heating the resultant granule in the method.

60. 发明专利

JPH07149689A PRODUCTION OF GLYOXYLIC ACID 失效
公开(公告)号：JPH07149689A
公开(公告)日：1995-06-13
申请号：JP29774193
申请日：1993-11-29
申请人： MITSUI TOATSU CHEMICALS
发明人： SUDOU KAZUTO , WAKIMURA KAZUO , TANAKA MASAO , INOUE HATSUO , IWANE NOBUHISA
IPC分类号： B01J23/62 , B01J23/644 , C07B61/00 , C07C51/235 , C07C59/153
摘要： PURPOSE:To obtain glyoxylic acid in an industrially advantageous way by accomplishing its high yield and suppressing the amounts of byproducts with the use of a palladium catalyst having been considered to be low in reaction efficiency. CONSTITUTION:Glyoxylic acid can be obtained by catalytic oxidation of an aqueous solution of glyoxal with oxygen using a catalyst prepared by adding, as a cocatalyst, at least one kind of element selected from Pb, Sn, Bi and In or compound(s) thereof to a palladium catalyst.

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