固体超强酸TiO_2/SO_4^(2-)催化合成α-萘乙酸甲酯  

Synthesis of Methyl a-Naphthaleneacetate Catalyzed by Solid Superacid TiO_2/SO_4^(2-)

作　　者：马冰洁[1] 唐洪波[1] 

机构地区：[1]沈阳工业大学理学院,沈阳110023

出　　处：《农药》2004年第4期165-166,共2页Agrochemicals

摘　　要：以固体超强酸TiO2／SO42-为催化剂,研究了α-萘乙酸与甲醇的酯化反应,探讨了催化剂种类、用量及活化温度等反应条件,发现固体超强酸TiO2／SO42-对α-萘乙酸与甲醇的酯化反应具有较高的催化活性,并使后处理简化。较佳反应条件为:α-萘乙酸与甲醇的摩尔比为1:5.3,固体超强酸TiO2／sO42-活化温度为450℃-500℃,活化时间3h,用量为α-萘乙酸用量的3％,反应时间6h,反应温度74.5℃-76℃。在试验筛选的最佳条件下,酯产率超过96％,精酯收率达83％。Methyl α-naphthaleneacetate was synthesized by using α-naphthaleneacetic acid and methanol as raw materials and solid superacid TiO2/SO42- as a catalyst. Reaction conditions, including type and rate of catalyst and activation temperature, were investigated in detail. Solid superacid TiO2/SO42- showed high catalytic activity and simplified subsequent processing. Optimum reaction conditions for methyl a-naphthaleneacetate synthesis were as follows: mole ratio of a-naphthaleneacetic acid to methanol was 1:5.3, activation temperature, activation time, and use rate of solid superacid were 450 - 500℃ , 3h, 3% (by mass of α-naphthaleneacetic acid), respectively, reaction time was 6 h, and reaction temperature 74.5-76℃ . The yield of crude ester was >96%, and the yield of refined ester was 83% under optimum experimental conditions.

关 键 词：Α-萘乙酸甲酯 固体超强酸 催化合成 催化剂 Α-萘乙酸 甲醇 植物生长调节剂 

分 类 号：TQ452[化学工程—农药化工]