Abstract:
PROBLEM TO BE SOLVED: To provide a method for reductively cleaving a bis(alkoxysilylorganyl)polysulfide, achieving at least an equivalent conversion rate under a more moderate temperature and/or pressure condition as compared with those of publicly known methods. SOLUTION: This method for producing a mercaptoorganyl(alkoxysilane) by hydrogenating the bis(alkoxysilylorganyl)polysulfide with hydrogen in the presence of at least 1 kind of an alcohol and a doped metal catalyst is characterized by using the doped metal catalyst containing at least 1 kind of a substance consisting of a group of iron, an iron compound, nickel, a nickel compound, platinum, a platinum compound, osmium, an osmium compound, ruthenium, a ruthenium compound, rhodium, a rhodium compound, iridium and an iridium compound and at least 1 kind of a doping component. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a process with which a mixture composed of an organosilicon compound and a solid can simply and inexpensively be post-treated. SOLUTION: The process for preparing the organosilicon compound represented by general formula (I): (R 1 R 2 R 3 SiR 4 ) 2 S x is carried out as follows. A halogenated alkoxysilane represented by general formula (II): R 1 R 2 R 3 SiR 4 X is reacted with an anhydrous polysulfide represented by general formula (III): M 2 S z and/or an anhydrous sulfide represented by general formula (IV): M 2 S and, as necessary, sulfur in an organic solvent. In the method, the organic solvent is separated from the resultant suspension and the obtained mixture containing the organosilicon compound represented by general formula (I) and a solid MX is then mixed with water containing at least one buffer to separate the formed phase. COPYRIGHT: (C)2007,JPO&INPIT
Abstract translation:要解决的问题:提供一种由有机硅化合物和固体组成的混合物可以简单且廉价地进行后处理的方法。 解决方案:制备由通式(I)表示的有机硅化合物的方法:(R 1 SP 3 R 2) SP> 4 SP>) 2 SB> S x SB>如下进行。 由通式(II)表示的卤代烷氧基硅烷:R 1和R 2相同,R 1, 与由通式(III)表示的无水多硫化物:和/或由通式(IV)表示的无水硫化物:M< SB> 2& / SB> S,根据需要在有机溶剂中含硫。 在该方法中,从得到的悬浮液中分离有机溶剂,然后将所得到的含有通式(I)表示的有机硅化合物和固体MX的混合物与含有至少一种缓冲液的水混合以分离形成的相。 版权所有(C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing an organosilane of polysulfide, which method enables a high conversion rate in the case of good selectivity, makes unnecessary the use of a solid alkali metal sulfide hydrate, and allows an alkali metal hydroxide in a sulfuration source material. SOLUTION: The method for producing an organosilane represented by general formula I includes reacting a (halogenated organyl)alkoxysilane represented by formula II with a water-containing alkali metal hydrogen sulfide, sulfur, and an alkali metal carbonate in an alcohol. In this method, the molar ratio of the (halogenated organyl)alkoxysilane represented by formula II to the alkali metal hydrogen sulfide is 1:0.40 to 1:0.75 and the molar ratio of the alkali metal hydrogen sulfide to the alkali metal carbonate is 1:0.5 to 1:1.5. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a mercaptorganyl(alkoxysilane) in high conversion through reductively splitting the corresponding bis(alkoxysilylorganyl) polysulfide without using any further antipoisening reagent such as water, an alcohol or hydrogen sulfide for a necessary metal catalyst. SOLUTION: The method for producing the mercaptorganyl(alkoxysilane) comprises hydrogenating the corresponding bis(alkoxysilylorganyl) polysulfide in the presence of a metal catalyst in a solvent at a temperature lower than 190°C under a pressure lower than 100 bar without addition of water, an alcohol or hydrogen sulfide. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide one more method for producing an organosilylalkylpolysulfane with causing only a small amount of by-product to be abandoned. SOLUTION: This method for producing an organosilylalkylpolysulfane is characterized in that in a method for producing an organosilylalkylpolysulfane represented by general formula I (R1R2R3SiR4)2Sx (I), an organosilylalkylpolysulfane represented by general formula II (R1R2R3SiR4)2Sy (II) is reacted with an ionic sulfide represented by general formula III M+2S2- (III) and an organosilylalkyl halide represented by general formula (IV) R1R2 R3SiR4X (IV), the long-chain organosilylalkylpolysulfane represented by general formula II and the organosilylalkyl halide represented by general formula (IV) are initially introduced into the reaction vessel and the ionic sulfide represented by general formula III is added to the solution in several portions.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a mercaptorganyl(alkoxysilane) in high conversion through reductively splitting the corresponding bis(alkoxysilylorganyl) polysulfide without using any further antipoisening reagent such as water, an alcohol or hydrogen sulfide for a necessary metal catalyst. SOLUTION: The method for producing the mercaptorganyl(alkoxysilane) comprises hydrogenating the corresponding bis(alkoxysilylorganyl) polysulfide in the presence of a metal catalyst at a temperature lower than 190°C under a pressure lower than 100 bar without addition of water, an alcohol or hydrogen sulfide. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a method for preparing an anhydrous alkali metal sulfide which forms a particulate product and no dust and performs better heat exchange or matter exchange compared to that in conventional methods. SOLUTION: In the preparation method for the anhydrous alkali metal sulfide, a hydrated alkali metal sulfide is dried through fluidized bed spray granulation. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a method for preparing an anhydrous alkali metal sulfide. SOLUTION: A solution, a suspension or a dispersion of the alkali metal sulfide or its melt in its water of crystallization is dried through spray drying using a steam-loaded inert dry gas. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
Preparation of organosilanes (I), comprises reacting (halogenoorganyl)alkoxysilane (II) with aqueous alkaline hydrogen sulfide, sulfur and alkali-carbonate in alcohol, where the molar ratio of (halogenoorganyl)alkoxysilane to alkaline hydrogen sulfide is 1:0.4 to 1:0.75 and the molar ratio of alkali-carbonate to alkaline hydrogen sulfide is 1:0.5 to 1:1.5. Preparation of organosilanes of formula ([((R) 2)(R 1>-O)Si-R 2>)] 2-S m) (I), comprises reacting (halogenoorganyl)alkoxysilane of formula ([((R) 2)(R 1>-O)Si-R 2>)]-X) (II) with aqueous alkaline hydrogen sulfide, sulfur and alkali-carbonate in alcohol, where the molar ratio of (halogenoorganyl)alkoxysilane to alkaline hydrogen sulfide is 1:0.4 to 1:0.75 and the molar ratio of alkali-carbonate to alkaline hydrogen sulfide is 1:0.5 to 1:1.5. R : 1-8C alkyl, 1-8C alkenyl, 1-8C aryl, 1-8C aralkyl or OR 1>; R 1>H, 1-24C monovalent alkyl or alkenyl, aryl, aralkyl, alkyl ether (-(C(R 3>) 2) y 1>-O-R 4>) or alkyl polyether (-C(R 3>) 2O) y 2>-R 4> or -(C(R 3>) 2-C(R 3>) 2-O) y 2>-R 4>); y 1>1-20; y 2>2-20; R 3>H or alkyl; R 4>optionally saturated, aromatic or mixed aliphatic/aromatic monovalent 1-30C hydrocarbon; R 2>optionally saturated aliphatic, aromatic or mixed aliphatic/aromatic divalent 1-30C hydrocarbon, which is optionally substituted with F, Cl, Br, I, SH, NH 2 or NHR 1>; m : average sulfur chain length of 1.5-4.5; and X : Cl, Br, F or I.
Abstract:
Preparation of organosilicon compound (I) comprises reacting halogenalkoxysilane (II) with a dry polysulfide (III) dry sulfide (IV) and optionally a sulfur in an organic solvent; removing the mixture containing (I) and the solid material with water containing at least a buffer from the organic solvent and separating the binding phase. Preparation of organosilicon compound (I) of formula ((R 1>R 2>R 3>SiR 4>) 2S x) comprises reacting halogenalkoxysilane compound (II) of formula (R 1>R 2>R 3>SiR 4>X) with a dry polysulfide compound (III) of formula (M 2S z) dry sulfide (IV) of formula (M 2S) and optionally a sulfur in an organic solvent; removing the mixture containing (I) and the solid material (MX) with water containing at least a buffer from the organic solvent and separating the binding phase. R 1>-R 3>alkyl, alkoxy (preferred) or aryl; R 4>1-30C-aliphatic/aromatic hydrocarbon; x : greater than 1; X : halogen atom; M : alkali cation, an ammonium or semi alkaline earth or zinc cation; and z : 2-8.