The age of formation of the mirabilite and sand wedges in the Hexi Corridor and their paleoclimatic interpretation

The Hexi Corridor is located at the transition zone of the Asian summer monsoon and westerly airflow, and lies in an important position in terms of its ecological fragility and climatic sensitivity. During a recent field expedition to this region, we found a sedimentary mirabilite layer in a number of localities including Suwushan, Yanchi, Baitujing, Yanchi Gaotai, Huahai, Yumen, Halanuo扙r, and Dunhuang (Fig. 1), which have the potential to provide important information about environmenta…     

以硝板和黑灰为原料研制沉淀硫酸钡

本项研究是以山西运城盐湖晒盐遗留的“硝板”和用煤粉还原重晶石所得的“黑灰”为原料,制取沉淀硫酸钡,找出了适宜的工艺条件。产品达到医用标准、并同时达到一级工业品(GB2899—82)标谁。     

硫酸钾生产技术

分析了国内外硫酸钾生产技术，介绍了国产化技术进程和我国具有自主知识产权的芒硝与氯化钾复分解法生产技术，并对3种国际成熟技术进行了综合比较。     

硝酸钾和芒硝制取硫酸钾的交互反应转化条件的研究

文章中利用K+.Na+//NO-3.SO2-4--H2O30℃水盐体系相图,对硝酸钾与芒硝两段转制取硫酸钾的工艺过程进行理论分析和计算,确定了最佳工艺流程.     

芒硝作为添加剂对小白鼠生长性能的影响研究

为了观察和分析芒硝对小白鼠体重和存活率的影响.选取健康成年小白鼠180只,随机分18组:对照组两组、以拌料方式添加0.15%、0.25%、0.40%、0.50%芒硝各两组、以饮水方式添加0.15%、0.15%、0.40%、0.50%芒硝各两组,均喂养一个月,观察并记录其体重增减情况和存活率.结果显示添加0.15%、0.15%、0.40%芒硝组的体重都高于对照组,0.25%芒硝组的体重明显高于其它组;0.50%芒硝组的存活率高于其它组.得出结论为浓度0.25%的芒硝最有利于小白鼠的生长和发育;以拌料方式喂养小白鼠其体重增长优于饮水方式:一定高浓度的芒硝有利于提高小白鼠的存活率.