Novel process for sodium bicarbonate preparation by low-temperature synthesis

The present process for sodium bicarbonate production by synthesis in China is introduced and analyzed,and some problems which exist in the process are pointed out.A novel process for sodium bicarbonate preparation is proposed,in which the temperature of preparing alkali liquid is low by adding high purity of Na2NO3 and Na2S.The new process is industrialized in an enterprise with NaHCO3 production capacity of 50 kt/a,and the result indicates that the new process could decrease the production cost and the energy consumption greatly,and increase the proportion of tiny granule powder and the quality of product,and the economic benefit is thus obtained evidently.