紫外可见分光光度法对单宁酸与钒络合性质的研究

Study on tannate and vanadium indexing property by ultraviolet spectrophotometry

采用紫外可见分光光度法研究了单宁酸与钒络合的性质，发现不同pH值时，单宁酸与钒络合物的络合比均为1：1，且随着pH值的增大，络合物稳定性增强；相同pH值时，随着温度的升高，络合物稳定性减弱；pH值在8—9，温度在25—40℃，单宁酸与钒络合，既可以防止栲胶脱硫过程中硫氧钒沉淀生成，又可以减少催化剂的损失。

Tannin and vanadium indexing composing by means of spectrography is defined, tannin and vanadium indexing composing in different basicity is 1 ： 1, with the pH value increasing, stability is more and more reinforce;In the same basicity, with the temperature increasing, stability is more and more weaken; This experiment elicits that basicity should be master of 8 - 9, and temperature 25 - 40 ℃. It can prevent deposition, as well as reduce the losing of catalyzer.