由芒硝制亚硫酸钠的研究

THE STUDY OF THE MANUFACTURE OF SODIUM SULPHITE ANHYDROUS FROM SODIUM SULFATE ANHYDROUS

制备亚硫酸钠的传统工艺原料是纯碱和烧碱。本项研究试图以从天然碱中分离出来的芒硝并配以石灰来代替它。 1 反应原理在消石灰与芒硝共存的悬浮液中,通入二氧化硫气体,首先发生的化学反应是:Ca(OH)_2+SO_2+H_2O=CaSO_3·2H_2O↓所生成的含CaSO_2·2H_2O细小结晶悬浮液,继续吸收二氧化硫,在介质呈酸性时,即转变成可溶性的亚硫酸氢钙而溶解,离解出的Ca^(2+)

This article is a section of a series of the studies of the synthetic utilization of natural soda ore, i.e. utilizing sodium sulfate anhydrous (Na_2SO_4) separated from natrual soda ore in stead of the utilizing of sodium carbonate and sodium hydroxide. Both the theory and the experiments are explored carefully in this article. Therefore, the success of this new technology will bring about economical and social benefits.