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    • 2. 发明专利
    • Method for producing ceramic precursor, ceramic precursor, method for producing ceramic, and ceramic
    • 用于生产陶瓷前体的方法,陶瓷前体,用于生产陶瓷的方法和陶瓷
    • JP2009227540A
    • 2009-10-08
    • JP2008077646
    • 2008-03-25
    • Ngk Insulators Ltd日本碍子株式会社
    • YAMADA NAOHITOFURUKAWA MASAHIRONANBA MASAHARU
    • C04B35/48C01C3/11C01C3/14C01C3/20C01G25/00C04B35/626
    • PROBLEM TO BE SOLVED: To more satisfactorily disperse the additional component of a ceramic precursor into the main component. SOLUTION: The atom-configurated ceramic can be obtained by coordinating a ligand 21 having an easily coordinatable part 22 which can be coordinated into an a component as the main component and a b component as an additional component and a hardly coordinatable part 23 in which the coupling with the a component and the b component is suppressed into the a component and the b component, so as to produce an a complex ligand 24 and a b complex ligand 25, adding an ion or a complex comprising a c component which can be coupled with two or more hardly coordinatable parts 23 (a c component 26) to a solution comprising the a complex ligand 24 and the b complex ligand 25, so as to produce a precursor 28 and firing the produced precursor 28 under mild conditions. Upon the production of the precursor 28, in the b complex ligands 25, mutual coupling is suppressed by the hardly coordinatable parts 23, and the c component lies therebetween, thus the phenomenon that the b components as an additional component are made adjacent does not occur, and the adjoining presence of the b components can be sufficiently suppressed. COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:为了使陶瓷前体的附加成分更均匀地分散到主要成分中。 解决方案:原子构型陶瓷可以通过配位具有易配位的部分22的配位体21,其可以配位成作为主要成分的组分和作为附加组分的ab组分和难以配位的部分23 其与a组分和b组分的偶联被抑制到组分和b组分中,以便产生复合配体24和ab络合配体25,加入离子或包含交联组分的络合物,其可以偶联 具有两个或多个难以配位的部分23(交流部件26)至包含络合配体24和b络合配体25的溶液,以便产生前体28并在温和条件下烧制所制备的前体28。 在制备前体28时,在b络合配体25中,互不耦合部分被几乎不配合的部分23抑制,并且c部件位于它们之间,因此不会发生作为附加部件的b成分相邻的现象 并且能够充分地抑制b成分的相邻存在。 版权所有(C)2010,JPO&INPIT
    • 5. 发明专利
    • PRODUCTION OF HIGH PURITY RHODAN SALT
    • JPH03257014A
    • 1991-11-15
    • JP5238490
    • 1990-03-02
    • KANSAI COKE & CHEMICALS
    • FUJITA HIDEO
    • C01C3/20
    • PURPOSE:To obtain high purity rhodan salt advantageously and industrially by allowing such an amine which itself is hardly soluble with water and an form water-insoluble addition product with rhodanic acid to contact with an aq. soln. containing sodium rhodanide to obtain an addition product, and bringing this product into contact with an aq. soln. of alkali material to decompose the addition product. CONSTITUTION:For example, an aq. soln. of sodium rhodanide having desired concn. obtained from waste liquid of desulferized gas from coke oven is treated with acid to change into an isolated acid type (namely, rhodanic acid) and controlled to show pH1-7. To this liquid treated with acid, the amine above described such as dicyclohexylamine or its N-alkylate is added, and preferably little by little, under stirred. Precipitate of the addition product which is hardly soluble with water is then separated by filtering, etc. The addition product thus separated is brought into contact with an aq. soln. of alkali material such as NaOH to decompose the addition product almost quantitatively. The water phase separated contains rhodanide salt in a dissolved state, which is recovered in the form of crystals as a industrial product.
    • 6. 发明专利
    • PRODUCTION OF RHODAN SALT AND THIOUREA FROM RHODAN AMMONIUM
    • JPH03257013A
    • 1991-11-15
    • JP5238390
    • 1990-03-02
    • KANSAI COKE & CHEMICALS
    • FUJITA HIDEO
    • C01C3/20C07C335/02
    • PURPOSE:To produce both of thiourea which has high additional value and high purity rhodan salt by adding amine to an aq. soln. of thiourea and unreacted NH4SCN prepared by dissolving transition reaction product of NH4 SCN in water and bringing the nonreacted NH4SCN into contact with an aq. soln. of alkali material. CONSTITUTION:Process (A); NH4SCN obtained from an aq. soln. containing NH4SCN such as waste water of desulfurized gas from coke oven is heated and dissolved to have a part of NH4SCN to transit to thiourea. Process (B); the above product is dissolved in water and brought into contact with amine, particularly comprising dicyclohexylamine to precipitate the addition product of NH4SCN and amine from which NH3 is removed. Process (C); The addition product is separated. Process (D); the addition product is brought into contact with an aq. soln. of alkali material such as NH3 to dissociate the addition product into rhodan salt and the original amine. Process (E); Thiourea is isolated from the filtrate containing thiourea in the process (C). Thus, rhodan salt and thiourea are both obtained from NH4SCN.
    • 7. 发明专利
    • PRODUCTION OF AMMONIUM THIOCYANATE
    • JPH02137717A
    • 1990-05-28
    • JP28854188
    • 1988-11-15
    • SUMIKIN CHEMICAL
    • YAMANE TOSHIOKAWAMURA SHIGEO
    • C01C3/20
    • PURPOSE:To obtain high-purity ammonium thiocyanate in high yield at a low cost by washing coke oven gas with a circulated aqueous solution of ammonium polysulfide containing suspended fine particulate sulfur, collecting HCN as ammonium thiocyanate, crystallizing and separating the resultant ammonium thiocyanate according to a specific method. CONSTITUTION:Coke oven gas is washed with a circulated aqueous solution of ammonium polysulfide containing suspended fine particulate sulfur to collect hydrogen cyanide contained in the coke oven gas as ammonium thiocyanate. The circulated aqueous solution is then partially taken out, thermally concentrated to the saturation solubility of the ammonium thiocyanate to filter and separate ammonium thiosulfate depositing in a hot state. Cooling is then carried out to deposit, filter and collect the ammonium thiocyanate. The resultant ammonium thiocyanate is useful as a raw material for dyeing assistants, agricultural chemicals, etc.