PROCESS OF MAKING AMORPHOUS HIGHLY DISPERSED GERMANIUM DIOXIDE AND PRODUCT OBTAINED THEREBY

1277592 Germanium dioxide DEUTSCHE GOLDUND SILBER-SCHEIDEANSTALT 4 Sept 1969 [20 Sept 1968] 43879/69 Heading C1A Amorphous highly dispersed germanium dioxide is prepared by reacting a volatile tetravalent germanium compound or a sprayable solution thereof under hydrolysing or oxidizing conditions in...

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Hauptverfasser:	DUESING G,DT, HECKEL E,DT, RENNGARDT F,DT, MEYER SIMON E,DT
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F INORGANIC CHEMISTRY MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Zusammenfassung:	1277592 Germanium dioxide DEUTSCHE GOLDUND SILBER-SCHEIDEANSTALT 4 Sept 1969 [20 Sept 1968] 43879/69 Heading C1A Amorphous highly dispersed germanium dioxide is prepared by reacting a volatile tetravalent germanium compound or a sprayable solution thereof under hydrolysing or oxidizing conditions in the gas phase or as an aerosol at a temperature above 1300 C., allowing the germanium dioxide formed to coagulate at a temperature of from 200 to 1000 C., and separating the gaseous reaction products. The germanium compound is preferably a halide or a volatile organo-germanium compound. The reaction is preferably carried out at a temperature of from 1400 to 1700 C. using a fuel gas of high calorific value with a free oxygen containing gas or pure oxygen, the mixture being reacted after passage through a nozzle. The germanium dioxide formed is preferably coagulated and separated at a temperature of from 400 to 700 C.