Disclosed herein are a method of reductively bleaching a mineral slurry comprising adding in the mineral slurry an effective amount of a formamidine sulfinic acid (FAS) and an effective amount of a borohydride to reductively bleach the mineral slurry, compositions comprising a mineral slurry, a FAS, and a borohydride, and final products comprising a mineral obtained by the method disclosed herein.

 
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> Synthesis of SAPO-34 with essentially pure CHA framework

> Preparation of silicate or glass in a furnace with burners immersed in a reducing medium
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