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The synthesis of hexafluoropropylene oxide in fixed-bed reactor using HFP as raw materials and molecular oxygen as oxidant is studied in the present paper. The selectivity of HFPO on the Ag/γ-Al2O3 catalyst prepared by impregnation can get 41.8%. The influence of the Ag/γ-Al2O3 catalyst modified by impregnation-sedimentation method and first group metal salts on synthesis reaction was investigated, as well as process conditions.

A facile approach for prepar ing stearoyl diethanolamide was reported. The as-synthesized product was further applied for the protection of car bon steel from corrosion solution. On the basis of orthogonal experiments, optimal reaction conditions were investigated. The results show that the yield rate can be up to 84.6% under a condition of molar ratio of stear ic acid to ethylenediamine is 1:1.7, the reaction time and temperature are 4 h a nd 175 °C, respectively. The optimal concentration and potential corrosion-inhibiting mechanism were al so investigated by using scanning electronic microscopy, weight loss and electrochemical analysis. The presented synthesis route is facile which enable it to be promisingly applied for production widely. Furthermore, the excellent corrosion-inhibiting properties of st earoyl diethanolamide also indicate that it can be a fascinating candidate for protecting steels from corrosion in oil exploration and transportation.

The extraction of flavonoids from peony leaves was studied recently. We carried out a research on the optimum technology of extracting flavonoids by single and orthogonal factor experiment. Finally we found the optimum conditions were: the ultrasonic temperature is 60 degrees, the ultrasonic time is 20min, the ultrasonic power is 600w, solid-liquid ratio is 1:25. Under this condition, the yield of flavonoids was 1.47% and the content was 8.34%.