MIXTURE FOR MAKING BROWN-COLOURED GLASE Russian patent published in 2010 - IPC C04B41/86 

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of silicates and glase compositions for depositing on ceramic tiles, bricks and maiolica articles. The mixture for making brown-coloured glase contains the following components, wt %: spent calcined SVD catalyst 77-80; calcium oxide CaO 8-10; iron oxide Fe₂O₃ - 10-15. The spent calcined SVD catalyst has the following composition, wt %: SiO₂ - 73.81, V₂O₅ - 8.33, Al₂O₃ - 5.95, K₂O -11.91.

EFFECT: low cost of glase and recycling of sulphuric acid production wastes.

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