BF3催化C8～C13混合烯烃的聚合工艺

Polymerization Process of C_8～C_(13) Alpha-Olefins Catalyzed by Boron Trifluoride

聚α-烯烃合成油（PAO）是重要的合成润滑油之一。使用三氟化硼作催化剂对α-烯烃（C8～C13）的聚合进行了研究。考察了温度、压力、反应时间、引发剂、引发剂的质量分数等工艺条件对聚α-烯烃合成油产率的影响。确定了合成聚α-烯烃合成油的最佳工艺争件是温度为30℃，压力为0．4MPa，反应时间为4h．引发剂为正丁醇，引发剂的质量分数为0．1％。在最佳工艺杀件下，用10L反应釜进行了放大实验，研究了聚α-烯烃合成油的物化性能。结果表明，产品收率为81．42％，100℃的粘度为4．87mm^2/s，40℃的粘度为21．15mm^2／s．粘度指数为126，凝点为-62℃。合成油具有粘度低，凝点低，粘度指数高的优异特点。为进一步工业化开发聚α-烯烃合成油提供了基础数据。

Poly alpha- olefins synthetic lubricant （PAO） is one of the important synthetic lubricant. The polymerization of C8- C13 alpha- olefins had been studied with boron trifluoride as catalyst. The effects of various kinds of technological condition, such as temperature, pressure, reaction time, various kinds of promoters and mass fraction of the promoter on the yield of the poly- alphaolefins synthetic lubricant were studied. The optimum technological conditions of poly- alpha - olefins synthetic lubricant are that the temperature is 30 ℃, the prexsure is 0.4 MPa, the reaction time is 4 hours, the promoter is n butanol, and the mass fraction of the promoter is 0.1%. Under the optimum technological conditions, enlarge experiment of poly alpha olefins synthetic lubricant was carried out with 10 L reactor. The properties of the poly - alpha- olefin synthetic lubricant were studied. The yield of the poly - alpha- olefins synthetic lubricant is 81.42%. The results show that the visccxsity at 100℃ is 4.87 mm^2/s, the viscosity at 40 ℃is 21.15 mm^2/s, the viscosity index is 126, the condensation point is - 62 ℃. The products of synthetic lubricant have low viscosity, low condensation point and high viscosity index. This work provides a fundamental data for studying the poly alpha olefins synthetic lubricant in industry.