摘要:
Verfahren zur Herstellung von Siliciumtetrafluorid durch Hydrolyse von siliciumfluorhaltigen Gasen, wobei das Hydrolysat mit Natrium-, Kalium- und/oder Bariumfluorid umgesetzt und des erhaltene Reaktionsprodukt termisch unter Bildung des Siliciumtetrafluorids zersetzt wird.
摘要:
A method of preparing a cyclohexasilane compound from trichlorosilane is provided. The method includes contacting trichlorosilane with a reagent composition to produce a compound containing a tetradecahalocyclohexasilane dianion, such as a tetradecachlorocyclohexasilane dianion. The reagent composition typically includes (a) tertiary polyamine ligand; and (b) a deprotonating reagent, such as a tertiary amine having a pKa of at least about 10.5. Methods of converting the tetradecahalocyclohexasilane dianion-containing compound to cyclohexasilane or a dodecaorganocyclohexasilane are also provided.
摘要:
Processes for purifying silicon tetrafluoride source gas by subjecting the source gas to one or more purification processes including: contacting the silicon tetrafluoride source gas with an ion exchange resin to remove acidic contaminants, contacting the silicon tetrafluoride source gas with a catalyst to remove carbon monoxide, by removal of carbon dioxide by use of an absorption liquid, and by removal of inert compounds by cryogenic distillation; catalysts suitable for removal of carbon monoxide from silicon tetrafluoride source gas and processes for producing such catalysts.
摘要:
A pyrometallurgical process and apparatus for converting spent potliners from aluminium manufacturing or other hazardous materials into an amorphous sodium and calcium fluroaluminosilicate glass frit and high carbon material. Spent potliners, sillica or siliceous material, and a calcium oxide source are fed into the non-burner end of a counter-current rotating kiln. The material is heated to destroy cyanides, convert fluoride salts to calcium fluoride and form a homogeneous liquid material. Carbon is then physically separated from the material. The material is then vitrified to produce a valuable glass frit and a high carbon material.
摘要:
A silane polymer is disclosed which has a larger molecular weight in view of boiling point, safety, and wetting property in case when it is applied to a substrate. In particular, a composition is disclosed which enables to form a good silicon film easily. A composition for forming a silicon film is disclosed which contains a silane polymer obtained by irradiating a photopolymerizable silane compound with light in a specific wavelength range for causing photopolymerization thereof. A method for forming a silicon film is also disclosed wherein such a composition is applied to a substrate and then subjected to heat treatment and/or photo treatment.
摘要:
Verfahren zur Herstellung von Siliciumtetrafluorid durch Hydrolyse von siliciumfluorhaltigen Gasen, wobei das Hydrolysat mit Natrium-, Kalium- und/oder Bariumfluorid umgesetzt und des erhaltene Reaktionsprodukt termisch unter Bildung des Siliciumtetrafluorids zersetzt wird.