中铬黄生产过程中硝酸钠的回收及水的循环使用  

Recovery of Sodium Nitrate in the Production Process of Middle Chrome Yellow and the Recycling Use of the Water

作　　者：赵京询 张忠 

机构地区：[1]天津铬业集团致远化工颜料有限公司,天津300401

出　　处：《中国涂料》2012年第10期69-72,共4页China Coatings

摘　　要：对铅铬颜料生产过程中产生的废水中的硝酸钠进行了专门研究,将生产过程中产生的母液水及梯度提浓含硝酸钠的水重复用于化学合成前的溶料和制作硝酸铅工序中,经多次循环使用,使硝酸钠浓度成倍提高,再对其进行浓缩结晶,经检测,副产品硝酸钠的品质可达工业级。This paper specially studies the sodium nitrate in the wastewater generated in the process of lead chrome pigment production. In the study, the mother liquid water and the water containing sodium nitrate of gradient concentration are reused in the soluble material before chemical synthesis and in the production process of lead nitrate. After circulation use for several times, the concentration of sodium nitrate has been doubled. And through thickening crystallization, the by-product, sodium nitrate is obtained. Test shows that it can reach industrial grade.

关 键 词：中铬黄 母液重复提用浓缩 梯度洗涤提浓 浓缩(结晶)硝酸钠 回收冷凝水 节能减排 清洁生产 

分 类 号：TQ630.9[化学工程—精细化工]