关键词: 铬酸钠, 氧化铬绿颜料, 氢还原, 烧结, 清洁工艺

Abstract:

A new method to prepare chromic oxide green pigment was proposed. According to the investigation of key factors and related mechanism of the hydrogen reduction and sintering step, chromic oxide green pigment with excellent performance was prepared, and NaOH as byproduct was obtained for recycling use. The results showed that lower hydrogen reduction temperature and suitable addition of Al, were beneficial to obtaining the high quality chromic oxide green pigment. Additionally, sintering mechanism of the chromic oxide green pigment was evaporation-condensation. Based on the chromate clean process and integrated technology of chromium compounds which was developed by the Institute of Process Engineering, Chinese Academy of Sciences, the new method efficiently enables the short and clean production route from chromite ore to chromic oxide green pigment, expanding application of chromate clean production.

Key words: 铬酸钠, 氧化铬绿颜料, 氢还原, 烧结, 清洁工艺