METHOD OF PRODUCTION OF SYNTHETIC RAW MATERIAL FOR GLASS MAKING Russian patent published in 2007 - IPC C03B1/00 C03C1/02 

FIELD: glassmaking industry; production of synthetic raw material for making glass on base of silicates of alkaline or alkaline-earth metals.

SUBSTANCE: silicates of alkaline and alkaline-earth metals are obtained in single cycle through interaction of aqueous solution of alkaline metal hydroxide with silica-containing material, mainly quartz sand at temperature of 130-240°C and excessive pressure arising at this temperature at presence of hydroxide of alkaline-earth metal. Production of silicates may be also performed at presence of compounds of glass-forming elements and/or dyeing elements, and/or modifying elements, and/or gas-forming agents. Besides that, proposed method includes introduction of the same or other elements into synthetic raw material after obtaining silicates of alkaline or alkaline-earth metals at temperature of 50-120°C. After drying and/or granulation, synthetic raw material is obtained in form of powder or granulated product. Proposed method considerably facilitates procedure of production of synthetic raw material due to simultaneous synthesis of main silicates carried out in one reactor at lower temperatures.

EFFECT: reduced labor input; reduced power requirements.

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