Silicon Compounds thereof

CCHEMISTRY METALLURGY C01Inorganic chemistry C01BNON-METALLIC ELEMENTS COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C

C01B33/00Silicon Compounds thereof

C01B33/02Silicon C01B33/021Preparation C01B33/023by reduction of silica or free silica-containing material C01B33/025with carbon or a solid carbonaceous material C01B33/027by decomposition or reduction of gaseous or vaporised silicon compounds other than silica or silica-containing material C01B33/029by decomposition of monosilane C01B33/03by decomposition of silicon halides or halosilanes or reduction thereof with hydrogen as the only reducing agent C01B33/031by decomposition of silicon tetraiodide C01B33/033by reduction of silicon halides or halosilanes with a metal or a metallic alloy as the only reducing agents C01B33/035by decomposition or reduction of gaseous or vaporised silicon compounds in the presence of heated filaments of silicon, carbon or a refractory metal C01B33/037Purification C01B33/039by conversion of the silicon into a compound, optional purification of the compound, and reconversion into silicon C01B33/04Hydrides of silicon C01B33/043Monosilane C01B33/046Purification C01B33/06Metal silicides C01B33/08Compounds containing halogen C01B33/10Compounds containing silicon, fluorine, and other elements C01B33/103Fluosilicic acid; Salts thereof C01B33/107Halogenated silanes C01B33/10705Tetrafluoride C01B33/1071Tetrachloride, trichlorosilane or silicochloroform, dichlorosilane, monochlorosilane or mixtures thereof C01B33/10715prepared by reacting chlorine with silicon or a silicon-containing material C01B33/10721with the preferential formation of tetrachloride C01B33/10726from silicon C01B33/10731with the preferential formation of trichlorosilane C01B33/10736from silicon C01B33/10742prepared by hydrochlorination of silicon or of a silicon-containing material C01B33/10747with the preferential formation of tetrachloride C01B33/10752from silicon C01B33/10757with the preferential formation of trichlorosilane C01B33/10763from silicon C01B33/10768Tetrabromide; Tetraiodide C01B33/10773Halogenated silanes obtained by disproportionation and molecular rearrangement of halogenated silanes C01B33/10778Purification C01B33/10784by adsorption C01B33/10789the adsorbing material being formed in situ C01B33/10794by forming addition compounds or complexes, the reactant being possibly contained in an adsorbent C01B33/113Silicon oxides Hydrates thereof C01B33/12Silica Hydrates thereof C01B33/122Lepidoic silicic acid C01B33/124Preparation of adsorbing porous silica not in gel form and not finely divided C01B33/126Preparation of silica of undetermined type C01B33/128by acidic treatment of aqueous silicate solutions C01B33/14Colloidal silica C01B33/141Preparation of hydrosols or aqueous dispersions C01B33/1412by oxidation of silicon in basic medium C01B33/1415by suspending finely divided silica in water C01B33/1417an aqueous dispersion being obtained C01B33/142by acidic treatment of silicates C01B33/143of aqueous solutions of silicates C01B33/1435using ion exchangers C01B33/145Preparation of hydroorganosols, organosols or dispersions in an organic medium C01B33/146After-treatment of sols C01B33/1465"Build-up" of particles using only one sol and a "heel" consisting or not of the sol C01B33/148Concentration Drying Dehydration Stabilisation Purification C01B33/1485Stabilisation C01B33/149Coating C01B33/151by progressively adding a sol to a different sol C01B33/152Preparation of hydrogels C01B33/1525from or via fluosilicic acid or salts thereof C01B33/154by acidic treatment of aqueous silicate solutions C01B33/1543using ion exchangers C01B33/1546the first formed hydrosol being converted to a hydrogel by introduction into an organic medium immiscible or only partly miscible with water C01B33/155Preparation of hydroorganogels or organogels C01B33/157After-treatment of gels C01B33/158Purification Drying Dehydrating C01B33/1585Dehydration into aerogels C01B33/159Coating or hydrophobisation C01B33/16Preparation of silica xerogels C01B33/163by hydrolysis of organosilicon compounds C01B33/166by acidification of silicate in the presence of an inert organic phase C01B33/18Preparation of finely divided silica neither in sol nor in gel form After-treatment thereof C01B33/181by a dry process C01B33/182by reduction of a siliceous material C01B33/183by oxidation or hydrolysis in the vapour phase of silicon compounds such as halides, trichlorosilane, monosilane C01B33/184by hydrolysis of tetrafluoride C01B33/185of crystalline silica-polymorphs having molecular sieve properties C01B33/186from or via fluosilicic acid or salts thereof by a wet process C01B33/187by acidic treatment of silicates C01B33/193of aqueous solutions of silicates C01B33/20Silicates C01B33/22Magnesium silicates C01B33/24Alkaline-earth metal silicates C01B33/26Aluminium-containing silicates C01B33/28Base exchange silicates C01B33/2807Zeolitic silicoaluminates with a tridimensional crystalline structure possessing molecular sieve properties; Isomorphous compounds wherein a part of the aluminium ore of the silicon present may be replaced by other elements such as gallium, germanium, phosphorus; Preparation of zeolitic molecular sieves from molecular sieves of another type or from preformed reacting mixtures C01B33/2815of type A (UNION CARBIDE trade name; corresponds to GRACE's types Z-12 or Z-12L) C01B33/2823from aqueous solutions of an alkali metal aluminate and an alkali metal silicate excluding any other source of alumina or silica C01B33/283from a reaction mixture containing at least one aluminium silicate or aluminosilicate of a clay-type C01B33/2838of faujasite type, or type X or Y (UNION CARBIDE trade names; correspond to GRACE's types Z-14 and Z-14HS, respectively) C01B33/2846of type X C01B33/2853of type Y C01B33/2861of mordenite type C01B33/2869of other types characterised by an X-ray spectrum and a definite composition C01B33/2876from a reacting mixture containing an amine or an organic cation C01B33/2884the aluminium or the silicon in the network being partly replaced C01B33/2892containing an element or a compound occluded in the pores of the network C01B33/32Alkali metal silicates C01B33/325After-treatment C01B33/36having base-exchange properties but not having molecular sieve properties C01B33/38Layered base-exchange silicates C01B33/40Clays C01B33/405not containing aluminium C01B33/42Micas; Interstratified clay-mica products C01B33/425not containing aluminium C01B33/44Products obtained from layered base-exchange silicates by ion-exchange with organic compounds such as ammonium, phosphonium or sulfonium compounds or by intercalation of organic compounds C01B33/46Amorphous silicates