Influence of adding KH_2PO_4 on WO_3/γ-Al_2O_3 solid acid catalyst for the synthesis of acrylic acid from lactic acid

摘要

KH_2PO_4-WO_3/γ-Al_2O_3 solid acid catalyst was prepared by the method of impregnation. According to the lactic acid dehydration production of acrylic acid reaction, some parameters including the load of WO_3 on γ-Al_2O_3, the calcination temperature, the reaction temperature and lactic acid concentration were investigated. The results show that the conversion of lactic acid was 92%, and the selectivity of acrylic acid was 29% under the optimized preparation conditions.