碳素铬铁水热法制红矾钠  

Preparation of sodium bichromate dihydrate by hydrothermal oxidizing reaction

作　　者：纪柱[1] 

机构地区：[1]中海油天津化工研究设计院,天津300131

出　　处：《无机盐工业》2012年第2期44-47,共4页Inorganic Chemicals Industry

摘　　要：在碳素铬铁水热法制铬酸钠的基础上,充分利用二氧化碳的酸化、催化作用,可在不增添设备和原料的情况下,使反应产物由含少量游离碱的铬酸钠碱性液,转变为含少量铬酸钠的重铬酸钠溶液,同时碱耗下降1/3。该反应可用纯碱代替烧碱。结果表明,采用炉料铬粉水热反应制得的红矾钠成本可望低于铬铁矿焙烧法的成本。Based on hydrothermal oxidizing reaction of high content carbon ferrochrome for manufacturing sodium chromate, the reaction product sodium chromate alkaline solution containing a small amount of free alkali was converted into sodium bichromate solution containing a small amount of sodium chromate,and meanwhile alkali consumption declined by 1/3 ,by taking full advantage of acidification and catalytic effect of carbon dioxide, and without adding equipment and raw material. Soda can be used to replace caustic soda in the reaction.Experiment results showed that sodium bichromate cost of applying high content carbon ferrochrome powder hydrothermal oxidizing reaction promises to be less than that of high-temperature chromite roasting.

关 键 词：碳素铬铁水热法 红矾钠 纯碱 

分 类 号：TQ131.12[化学工程—无机化工]