| 摘要 |
FIELD: inorganic compounds technology. ^ SUBSTANCE: process consists in preparation of melt CaO-Na2O by firing soda ash production waste containing CaO, CaCO3, and Na2CO3 at 1000-1100°C followed by leaching and evaporation of resulting sodium hydroxide. Calcium hydroxide formed in leaching stage is subjected to carbonization with carbon dioxide isolated in melt preparation stage. Process can be used in production of soaps, paints, cellulose, and the like. ^ EFFECT: increased concentration of sodium hydroxide in final product and consumed soda ash production waste. ^ 4 cl, 1 dwg, 1 tbl |
