Study On Synthesis Of Organosilicon Compounds Directly From Amorphous Silica

The methods of preparation of organosilicon from amorphous silica have been studied. A series of results have been obtained as follows:Firstly, pentacoordinate and hexacoordinate organosilicon compounds have been synthesized by residue silica, residue after extracting magnesium from serpentine and residue after extracting aluminum from bentonite by atmospheric pressure distilling method (200 癈) in this paper. The optimum conditions of synthesis have been achieved. The structures of organosilicon have been characterized by 1R and XRD.Secondly, the decompressing distillation method (120 癈) has been applied to prepare pentacoordinate and hexacoordinate organosilicon compounds by residue silica, residue after extracting magnesium from serpentine and residue after extracting aluminum from bentonite. The optimum factors of synthesis have been obtained. Meanwhile the advantages and drawbacks of two methods have been analyzed and compared. The structures of organosilicon have been characterized by IR and XRD.Thirdly, cordierite and mullite have been synthesized by residue silica, residue after extracting magnesium from serpentine and residue after extracting aluminum from bentonite under relatively low temperature in our work. The structure of the resulting products has been characterized by X-ray diffractions.