催化法合成二烷基二硫代磷酸氧钼

Catalytic Synthesis of Oxymolybdenum Dialkydithiophosphate

采用HY-6型酸性离子交换树脂催化剂合成二烷基二硫代磷酸氧钼（MoDDP）。通过对金属的质量分数及收率、反应产物选择性、硫磷酸制备条件等方面的考核，确定了最佳工艺条件。结果表明，在混醇与五硫化二磷的摩尔比为3．95：1，控制反应温度为70～90℃，反应时间为2h的条件下制备硫磷酸。在催化剂存在下，保持温度为80～100℃，反应时间4～6h制备二烷基二硫代磷酸氧钼，产物中金属钼的质量分数达到10％以上，二烷基二硫代磷酸氧钼的收率超过85％。制得的产品经摩擦试验机验证其摩擦性能与传统还原法产品相当。

Oxymolybdenum dialkyldithiophosphate（MoDDP） additive w＆s synthesized by using the new type catalyst HY - 6 acidic ion- exchange resin. The effects of mass fraction and the yield of the metal molybdenum, the reactant selectivity, the preparation conditions of dialkydithiophosphate （HDDP） were investigated. The optimum process conditions were determined. The optimum reaction conditions for preparing HDDP are as follows： molar ratio of the compound alcohol （C4, C8 ） to P2S5 is 3.95： 1, reaction temperature is 70 - 90℃, reaction time is 2 h. The optimum reaction conditions for preparing MoDDP are as follows： reaction temperature is 80-- 100℃, reaction time is 4-6 h with HY - 6 as catalyst. The results show that the mass fraction of molybdenum content of product is above 10 %, the yield of MoDDP reach 85 %. The friction test machine antiwear performances of MoDDP were evaluated. The product by this catalytic method has the similar effectiveness to that of reduction method.