Two-step Catalysis Prepared Different Terpinene Process

Terpinolene is a kind of fine chemicals, and its price is very expensive.lt is important to abtain the high-yield terpinolene.This paper prepared terpinolene using turpentine as raw material by two-stage catalyze. First, turpentine was inverted to high-yied dipentene and part terpinolene using 13X molecular sieve as catalyst.lt was found that catalyst , Molecular sieve-C-d, had optimum activity by inspecting the activity of 13X molecular sieve with different handling conditions. Second,dipentene in the first-stage products was inverted to terpinolene using SO427ZrO2 solid superacid as catalyst.so as to obtain the high-yield terpinolene.The SO42YZrO2 solid superacid catalyst which was prepared in different conditions had different activity.According to experiment ,the SO42YZrO2 - n -C-3 solid superacid catalyst and the SO42YZrO2-II-D-3 solid superacid catalyst had both optimum activity and optimum selectivity.The appropriate technology conditions in the first-stage reaction were as follows: catalyst was Molecular sieve-C-d, the ratio of catalyst and raw material was 4: 100, the diameter of catalyst was 30-100 cohorts, the reaction-temperature was 150, the reaction-time was 30-60 minutes. The appropriate technology conditions in the second-stage reaction were as follows: catalyst was SO427ZrO2-II-D-3 solid superacid catalyst, the ratio of catalyst and raw material was 4: 100, the reaction-temperature was 80, the reaction-time was 8-12 hours. Under the techonology conditions as the above, the yield of terpinolene can reach 35.24% by two-stage catalyzing turpentine.