关键词: 氮川三乙酸钠, 乙二胺四乙酸铁胺, 硫化氢, 脱硫剂, 复配

Abstract: In the crude oil mining process of Tarim Oilfield，the salinity in formation produced fluid salinity is high and the oil wells are filled with a lot of aggressive substances，such as hydrogen sulfide，carbon dioxide，chloride ions，and free oxygen. They cause severe corrosion to hole production casing，wellhead equipment，oil and gas the gathering system，and even cause a serious accident. In order to alleviate the problems of oilfield equipment due to the hydrogen sulfide corrosion，in this experiment we used the organic synthesis method to prepare a solution formed desulfurizer complex with NTS，iron EDTA amine，triethylamine，and DMF，and investigated the optimal proportion of complex by iodometry. Also，we explored determined the best desulfurization concentration of the compound agents in the simulated water with different sulfur contents by iodometric method. Experiments showed the optimal condition for the preparation of NTS as follows：ingredient ratio of chloroacetic acid and ammonium chloride = 3∶1. 02 （mole ratio），reaction temperature of 70℃，reaction time 2 hours，and pH of 1.0. Desulphurization experiment showed that the concentration of desulfurization agent in simulated water is 10% and the desulfurization effect is best when the highest desulfurization rate is 98.01%. Compound for synthesizing green desulfurizer has very good desulfurization effect，therefore it is expected to be applied in pipeline desulphurization toprevent hydrogen sulfide pipeline corrosion.

Key words: NTS, EDTA iron chelators, hydrogen sulfide, desulfurization agent, complex