硫代磷酸酯的合成及抑焦性能研究

以CH3OH、PCl3、二甲基亚砜为原料，合成出含硫、磷的新型抑焦剂硫代磷酸酯，并在管式裂解炉上，以轻质油为原料，水蒸气为惰性稀释剂，在常压、裂解温度为800～840 ℃的条件，分别考察二甲基二硫（DMDS）、磷酸二酯与自制新型抑焦剂硫代磷酸酯在不同温度下的抑焦性能。结果表明：硫代磷酸酯抑焦效果优于DMDS和磷酸二酯。同时，在轻质油中加入抑焦剂硫代磷酸酯还能提高乙烯的收率。

STUDY ON SYNTHESIS OF PHOSPHOROTHIOATE AND ANTI-COKING PERFORMANCE

A kind of coking inhibiter, phosphorothioate, was synthesized using CH3OH, PCl3, and dimethyl sulfone as feed. The anti-coking performance of dimenthyl disulfide (DMDS), phosphodiester and the new self-made coking inhibitor phosphorothioate was investigated, respectively in a tube cracking furnace at the conditions of 800-840 ℃ and atmospheric pressure. The light oil was used as pyrolysis material and steam as inert diluent. The results show that the phosphorothioate，as a new kind of coke inhibitor，has excellent anti-coking performance, better than DMDS and phosphodiester. It is found that the addition of phosphorothioate into light oil can increase the yield of ethylene.