METHOD OF PRODUCING GLASS, INVOLVING SURFACE TREATMENT WITH ALUMINIUM CHLORIDE IN OR DIRECTLY IN FRONT OF LEHR Russian patent published in 2012 - IPC C03C21/00 

FIELD: chemistry.

SUBSTANCE: method of making soda-lime glass containing a fraction of a glass base which contains the following in wt %: SiO₂ - 67-75; Na₂O - 10-20; CaO -5-15; Al₂O₃ - 0-7; K₂O - 0-7, involves feeding glass raw material into a furnace to form glass melt. The glass melt is then poured into a tin bath to obtain a glass strip. The glass strip is then directed into the lehr where it is annealed. At least one main surface of the glass strip is treated with AlCl₃ in or directly in front of the lehr when the glass strip is at temperature approximately ranging from 540°C to 850°C. Treatment involves depositing a mixture of AlCl₃ and at least one solvent onto the surface of the glass strip, where the mixture contains approximately 1-25% AlCl₃.

EFFECT: high alkali resistance of the glass.

20 cl, 1 tbl, 1 dwg