2⁃Phenylthioethanol was synthesized from thiophenol and ethylene carbonate using 1,5⁃diazabicyclo[4.3.0]non⁃5⁃ene (DBN) as a catalyst. The effects of catalyst type and amount, reaction time and temperature on the reaction were studied. The results showed that, the conversion of 2⁃phenylthioethanol can reach more than 90% when the reaction temperature is 50 ℃ and 100% conversion can be obtained when the reaction temperature is 90 ℃ using DBN as the catalyst, n(thiophenol)/n(DBN)=100, the reaction time 10 min. The selectivity of the catalyst of the synthetic route is 100% The paper discusses the reaction mechanism according to the theory of soft and hard acid and alkali.

The preparation of supported adsorbent Al(OH) ₃/SiO ₂ and its adsorption behavior on uranyl ions were studied.The effects of adsorbent quality,solution pH,initial solution concentration,temperature and contact time on adsorption performance were investigated.The adsorption mechanism was preliminarily studied based on adsorption isotherm,thermodynamics,and kinetics.The effects of coexisting ions and fulvic acid on the adsorption properties were also investigated.The results showed that when the adsorbent mass was 0.03 g,pH=5,initial concentration of uranyl ions was 1 mmol/L,temperature was 303 K and contact time was 60 min,the maximum adsorption capacity was 110.4 mg/g,which could be reused four times.The adsorption process of uranyl ion on Al(OH) ₃/SiO ₂ is endothermic and spontaneous.The adsorption of monolayers is dominant,the adsorption behavior conforms to the quasisecondary kinetic model,and the chemical adsorption is the rate control step.

The effect of initial concentration and pH value of the uranyl nitrate solution on the uranyl ion (UO2+2) hydrolysis reaction was studied by spectrophotometry. The maximum absorption wavelength of the obtained complexes in the reaction of UO2+2 ions with arsenazo (Ⅲ) at different pH values was also investigated. The results show that the absorption wavelength is 652 nm in the range of pH 3.0~7.0. It is easier for the uranyl nitrate solution to hydrolysis at higher pH value than the lower in the range of pH 4.0~6.0 at the same UO2+2 concentration. The uranyl solution at high concentration is prior to occurring hydrolysis reaction in the same pH value. Lowest pH values of various uranyl solutions were obtained for hydrolysis reaction. The results indicate that the concentration of uranyl solution should not exceed 1.000×10-3 mol/L at pH 5.0.

 

A new Nickel(Ⅱ) complex was sythesized with 2-hydroxy-4-methoxybenzophenone and NiCl2 used as raw materials, and characterized through IR, TG, UV. The results show that the complex ratio of 2-hydroxy-4-methoxybenzophenone to Nickel(Ⅱ) is 1∶2; the metal ion coordinates with oxygen atoms of -C=O and next to -OH group. Meanwhile, its thermal decomposition process is divided into three weightless stages during 120～630 ℃, of which 120～258 ℃ is the process of a coordinated water lost, and 258～630 ℃ has two thermal decomposition stages. Finally, the complex is decomposed into NiO. UV analysis indicates that thermal stability of the complex is better than that of 2-hydroxy-4-methoxybenzophenone. The complex remains the quality of absorbing ultraviolet radiation.