Study On The Synthesis Of Light Stabilizer UV-1084 And The Extracting Performance Of Its Intermediate 2, 2'-Thiobis-4-T-Octylphenol

2,2'-Thiobis(4-t-octylphenolato)-n-butylamine nickel is an efficiently light stabilizer. In this paper, it was prepared from p-t-octylphenol, sulfur dichloride, n-butylamine and nickel acetate by means of condensation and complexation. Effects of the reaction conditions were investigated and the optimal synthetic conditions were obtained:In condensation reaction, petroleum ether(60℃⁹0℃) as solvent, the dosage of p-t-octylphenol was 20.6g(0.1mol), the appropriate volume of petroleum ether was 80mL, the molar ratio of and sulfur dichloride was 2:1.1, the reaction temperature was 5℃⁸℃, the dropping time of sulfur dichloride was 80min, the reaction time was 2h. Upon the above proper conditions, the yield of 2,2'-thiobis-4-t-octylphenol was 85.5% based on p-t-octylphenol.In complexation reaction, chloroform as solvent, the molar ratio of 2,2'-thiobis-4-t- octylphenol, nickel acetate and n-butylamine was 1:1.25:3, the reaction temperature was 58℃, the reaction time was 2h. Upon the above proper conditions, the yield of 2,2'-thiobis- (4-t-octylphenolato)-n-butylamine nickel was 97.6% based on 2,2'-thiobis-4-t-octylphenol. The total yield of the two steps was 83.4%(based on p-t-octylphenol).The research on 2,2'-thiobis-4-t-octylphenol as metal extractant was not reported before. In this paper, its extracting performance for nickel has been studied. The results indicate that: In the extracting process, benzene as diluent, the concentration of 2,2'-thiobis-4-t- octylphenol was 1×10^-3mol/L, [Ni²⁺]=0.1g/L, pH=11, t=15min, the extracting temperature was 25℃, phase ratio(O/A)=1:1, in this condition, the extracting rate of nickel reaches 98.6%, the two phase separated rapidly, and there was no third phase appeared.In the stripping process, sulfuric acid was the feasible stripping agent, the single-stage stripping rate reaches 85.6% with sulfuric acid whose concentration was 4mol/L.