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机构地区:[1]常州化学研究所常州市绿色化学与技术重点实验室,江苏常州213164 [2]中国科学院成都有机化学研究所,四川成都610041
出 处:《合成化学》2014年第1期103-107,共5页Chinese Journal of Synthetic Chemistry
基 金:国家科技支撑计划资助项目(2011BAE07B04);常州市科技支撑计划资助项目(CE20110048);江苏省产学研联合创新资金--前瞻性联合研究项目(BY2011175)
摘 要:制备了系列Hβ分子筛催化剂Cat T(T为焙烧温度)和系列负载型催化剂CatR550[R=H2SO4(a),(NH4)2S2O8(b)和(NH4)2SO4(c)]。以邻苯二甲酸酐(2)和乙苯(3)经Friedel-Crafts酰基化反应合成2-乙基葸醌(1)为探针反应,考察了T和R对其催化活性的影响。结果表明:最佳焙烧温度为550℃;最佳R为c。以Cat550为催化剂对合成1的反应条件进行了优化,考察了反应温度,反应时间,Cat550用量及r[n(2)∶n(3)]对酰化反应的影响。在最佳反应条件[2 40 mmol,n(2)∶n(3)=1∶25,Cat550用量2.0 g,于250℃反应5 h]下,2的转化率为30.6%,1的选择性为33.8%,1的收率为10.3%。以Catc550为催化剂,在c(c)为1.75 mol·L-1时,在相同的最佳反应条件下,2的转化率为39.0%,1的选择性为43.4%,1的收率为16.9%。A series of Hβ zeolite catalysts[Cat T( T was activation temperature) ]and modified Hβ zeolite catalysts{ CatR 550 [R = H 2 SO 4( a),( NH 4) 2 S 2 O 8( b) and( NH 4) 2 SO 4( c) ]} were prepared. Effects of T and R on catalytic activities of the catalysts were investigated in synthesis of 2-ethylanthraquinone( 1) by one-step Friedel- Crafts acylation reaction from phthalic anhydride( 2) and ethylbenzene( 3). The results showed that the optimum T was 550 ℃ and R was c. Effects of reaction temperature,Cat 550 amount and r[n( 2) ∶ n( 3) ]on Friedel- Crafts acylation reaction were investigated using Cat 550 as the catalyst. The results showed that under the optimum reaction conditions[2 was 40 mmol,n( 2) ∶ n( 3) = 1 ∶ 25,Cat 550 was 2. 0 g,for 5 h at 250 ℃ ],the conversion of 2 was 30. 6%,the selectivity of 1 was 33. 8%,the yield of 1 was 10. 3%. Under the same optimum reaction conditions with Cat c 550 as the catalyst and c( c) was 1. 75 mol·L- 1,the conversion was 39. 0%,the selectivity was 43. 4%,and the yield was 16. 9%.
关 键 词:HΒ分子筛 多相催化 2-乙基蒽醌 FRIEDEL-CRAFTS酰基化反应 合成
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