摘要:
The invention relates to a complete method for producing pure silicon that is suitable for use as solar-grade silicon, comprising the reduction of a purified silicon oxide using one or more pure carbon sources, the purified silicon oxide, which was purified as silicon oxide dissolved in an aqueous phase, having a content of other polyvalent metals or metal oxides, in relation to the silicon oxide, of less than or equal to 300 ppm, preferably less than 100 ppm, especially preferably less than 50 ppm and according to the invention less than 10 ppm of the other metals and being obtained advantageously by gel formation in alkaline conditions. The invention also relates to a formulation containing an activator and to the use of purified silicon oxide together with an activator for producing silicon.
摘要:
The present invention relates to processes for industrial pyrolysis of a carbohydrate or carbohydrate mixture with addition of amorphous carbon, to a pyrolysis product thus obtainable and to the use thereof, especially as a reducing agent in the production of silicon from silica and carbon at high temperature.
摘要:
The present invention relates to an improved process for producing silicon, preferably solar silicon, using novel high-purity graphite mouldings, especially graphite electrodes, and to an industrial process for production of the novel graphite mouldings.
摘要:
The invention relates to a complete method for producing pure silicon that is suitable for use as solar-grade silicon, comprising the reduction of a silicon oxide, purified by acidic precipitation from an aqueous solution of a silicon oxide dissolved in an aqueous phase, using one or more pure carbon sources, the purified silicon oxide being obtained, in particular, by the precipitation of a silicon oxide dissolved in an aqueous phase in an acidifier. The invention also relates to a formulation containing an activator and to a device for producing silicon, a reactor and electrodes.
摘要:
The present invention relates to methods for the technical pyrolysis of a carbohydrate or carbohydrate mixture at an elevated temperature while adding silicon oxide, to a pyrolysis product obtainable in this way, and to the use thereof as a reducing agent for the production of solar silicon from silicic acid and carbon at a high temperature.
摘要:
The invention relates to a method for producing silicon carbide through reaction of silicon oxide and a carbon source comprising a hydrocarbon at high temperature, in particular to a technical method for producing silicon carbide or for producing compositions containing silicon carbide. The invention further relates to a high-purity silicon carbide, to compositions containing the same, to the use thereof as a catalyst and for the production of electrodes and other items.
摘要:
The invention relates to a method for producing carbon black or other flame aerosols, comprising the following steps: the heat is removed from the flame by dissipation and/or radiation; a thin gas boundary layer is formed; the flow formed by the flame and the gas boundary layer is accelerated or expanded; the obtained aerosol is withdrawn; and the cooling surface is cleaned. The invention further relates to a device for carrying out such a method and a black carbon having a maximum pH value of 6.0, a maximum ignition residue of 0.1 percent, and a maximum 5 μm screening refuse of 200 ppm. The inventive black carbon can be used in rubber, plastic, printing inks, inks, inkjet inks, toners, lacquers, dyes, paper, bitumen, concrete, and other construction materials.
摘要:
The invention relates to a method for producing carbon black or other flame aerosols, comprising the following steps: the heat is removed from the flame by dissipation and/or radiation; a thin gas boundary layer is formed; the flow formed by the flame and the gas boundary layer is accelerated or expanded; the obtained aerosol is withdrawn; and the cooling surface is cleaned. The invention further relates to a device for carrying out such a method and a black carbon having a maximum pH value of 6.0, a maximum ignition residue of 0.1 percent, and a maximum 5 μm screening refuse of 200 ppm. The inventive black carbon can be used in rubber, plastic, printing inks, inks, inkjet inks, toners, lacquers, dyes, paper, bitumen, concrete, and other construction materials.
摘要:
Carbon blacks containing silicon and a process for manufacturing them. The carbon blacks containing silicon are suitable as reinforcing carbon blacks for rubber mixtures and give the latter viscoelastic properties such as reduced rolling resistance in tires. At the same time, the wet traction is even improved in the process.
摘要:
There are prepared azido groups containing organosilicon compounds of the formula ##EQU1## where R is a divalent hydrocarbon group having 1 to 8 carbon atoms which is free from ethylenically unsaturated bonds and whose carbon chain in a given case, is interrupted once by --O--, --S--, or --NR.sup.3 where R.sup.3 is hydrogen, methyl, ethyl, or phenyl,R.sup.1 is a univalent alkyl group having 1 to 3 carbon atoms, phenyl, benzyl, or tolyl,R.sup.2 is an alkyl group having 1 to 4 carbon atoms, phenyl, benzyl, or an alkoxyalkyl group having a total of up to four carbon atoms,m is zero, 1, 2, or 3, andn is zero, 1 or 2 whereby m