稀土硫酸铬鞣液的电位滴定分析  

The Analysis of pH Potentiometric Titration on Mechanic of the Rare Earth-Chrome Tanning solution

作　　者：宫汉芳 

机构地区：[1]四川联合大学皮革工程系

出　　处：《皮革科学与工程》1996年第3期7-10,共4页Leather Science and Engineering

摘　　要：本文采用ｐＨ值电位滴定法，分别对Ｃｒ：ＲＥ（ＲＥ代表稀土元素Ｌａ，Ｃｅ，Ｐｒ）为１：０．０００、１：０．１２５、１：０．２５０、１：０．５００、０：１．０００，ｐＨ值分别为２．０、３．０和４．０，存放７天的稀土硫酸铬溶液进行ｐＨ值电位滴定对比研究，结果表明：稀土硫酸铬溶液的浑浊ｐＨ值低于单一稀土的浑浊ｐＨ值，并且随着稀土用量比例的增加，浑浊ｐＨ值降低。随着溶液ｐＨ值的升高，而浑浊ｐＨ值升高。The followed rare earth (La, Ce, Pr) chrome solutions: Cr: Re=1: 0.1: 0.125, 1 :0.25, 1 : 0.5 ; PH= 2, 3, 4 ; and stored 7 days were studied by pH potentionmetric titration. The results showed that the pH of the turbility point of the mixed solution is less than that of pure chrome sulfate solution or pure rare earth solution. Further more. with the content of rare earth increasing, pH of the turbility of mixed solution decreased and with the initial pH of mixed solution increasing, pH of turbility point increased.

关 键 词：稀土 铬鞣液 电位滴定 分析 

分 类 号：TS543[轻工技术与工程—皮革化学与工程] TS59