A method for synthesizing β?hydroxyethyl sulfide by reacting a thiol with ethylene carbonate by an organic acid potassium salt (KA) was reported. The results show that under normal pressure and solvent?free conditions, KOAc, KSAc and HCOOK have higher catalytic activity, and the catalytic activity of multi?organic potassium salt is relatively lower, while CF₃SO₃K and CH₃SO₃K have no catalytic activity. With KOAc as a catalyst, the order of reaction of various thiols is thiophenol>2?mercaptoethanol>hydrazine thiol>normal aliphatic thiol. According to the theory of soft and hard acid and base, the activation mechanism of -S-H by potassium salt was discussed.

The treatment of concentrated wastewater produced in the oil field was studied via self-made oily-water segregator. This laboratory apparatus comprises corrugated plate with pressurized dissolved-air flotation technology. The effects of the oil concentration of wastewater and influent flow on the removal efficiency of oil were mainly investigated. When the temperature is 50 ℃, influent flow rate is 70 L/h, the coalescence plate is coated by the galvanized paint, the removal efficiency of oil is up to 86.4%.