Fe2（SO4）3/γ-Al2O3固体酸催化剂制备条件的优化

摘要

Solid acid catalyst Fe_2（SO_4）_3/γ-Al_2O_3 was prepared by maceration method and used to hydrolyze phytin to inositol at atmospheric pressure. Inositol yield was calculated to evaluated the activity of the prepared catalyst. The effects of maceration solvent concentration, maceration time and baking temperature on catalyst activity were explored. The optimal conditions for preparing Fe_2（SO_4）_3/γ-Al_2O_3 were determined by response surface methodology （RSM） to be maceration solvent concentration of 50 mg/mL, maceration time of 4 h and baking temperature of 436 ℃. Under these conditions, Fe_2（SO_4）_3/γ-Al_2O_3 was obtained and used to successfully hydrolyze phytin to achieve an inositol yield of 14.18% and a hydrolysis efficiency of 70.9%.%采用浸渍法制备Fe2（SO4）3/γ-Al2O3固体酸催化剂,于常压下利用Fe2（SO4）3/γ-Al2O3催化水解菲丁制备肌醇,并以肌醇收率表征催化剂活性强度。考察浸渍质量浓度、浸渍时间、焙烤温度对催化剂活性的影响,采用响应面法进行优化,得到制备Fe2（SO4）3/γ-Al2O3最佳条件：浸渍质量浓度50mg/mL、浸渍时间4h、焙烧温度436℃,在此条件下制备的Fe2（SO4）3/γ-Al2O3固体酸催化剂催化水解菲丁,肌醇收率为14.18%,菲丁水解效率为70.9%。