摘要
分析了K2 Cr2 O7清洁生产工艺中Al(Ⅲ ) -K2 CrO4 -K2 Cr2 O7-H2 O体系的离子平衡 ,推导出 2 5℃时混合溶液中 [Al(Ⅲ ) ]和 [H+]、 [Cr2 O2 -7]/ [CrO2 -4 ]之间的对应关系 ,并由实验测定验证了这一关系。提出了通过调整K2 CrO4 碳酸化反应转化率来降低体系中Al(Ⅲ )杂质含量的新方法 。
On the basis of analysis of the ionic equilibrium of Al(Ⅲ)-K 2CrO 4-K 2Cr 2O 7-H 2O system in the clean production process for potassium dichromate,the quantitative relationship among the concentrations of Al(Ⅲ), H +,Cr 2O 2- 7 and CrO 2- 4 at room temperature (25?℃) was developed.It is proposed and confirmed in industrial test that the concentration of Al(Ⅲ) in the liquid phase can be minimized via adjusting the conversion rate of the carbonization of potassium chromate.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2003年第1期46-48,共3页
Chemical Industry and Engineering Progress
基金
国家 8 63计划资助项目 (No . 2 0 0 1AA640 70 10 )
关键词
重铬酸钾
铬酸钾
铝
碳酸化
pH值
脱除
清洁生产
铬盐
cleaner production,potassium dichromate,potassium chromate,aluminum(Ⅲ),pH, carbonization
