Study on Novel Technology of Copper Dross Smelting with Soda-lead Concentrate;

Study on synthesis of sodium bicarbonate by double decomposition method;

Novel process for sodium bicarbonate preparation by low-temperature synthesis;

Status quo of sodium bicarbonate production in China and its development proposals;

The research of the sodium thiphite production problems by the ways of complex reusing has adjusted the processing controlling indexes,improved the condensing equipments that make use of the discharged wasted hydrogen from chlor-alkali system,and lowered the producing cost.

This paper presents a process for preparing high purity tungsten trioxide in which Shizhuyuan high molybdenum scheelite concentrates are treated by molybdenum removal and NaHS extraction of tertiary amine, evaporation and crystallization using the autoclave-soda process.