碳族元素制取 Si:SiCl4(bp,330K)+Mg(或Zn)→Si Ge:GeCla(bp,356K)+H2O>GeO2 GeO2+H2→Ge+H2O SiCl4:SiO2+2C12+2C-SiCl4+2CO GeO2,TiO2,B203,Al2O3也有类似反应 PbO:2PbS+302-PbO+2S02 Pb:PbO+C→Pb+CO PbO+CO→Pb+CO2 碳族元素制取 Si: SiCl4(bp,330K)+Mg(或Zn)→Si Ge: GeCl4(bp,356K)+H2O→GeO2 GeO2+H2→Ge+H2O SiCl4 : SiO2+2Cl2+2C→SiCl4+2CO GeO2,TiO2,B2O3,Al2O3也有类似反应 PbO: 2PbS+3O2 → PbO+2SO2 Pb: PbO +C → Pb+ CO PbO+ CO → Pb + CO2