CALCIUM PHOSPHATE-SILICA CATALYSTS FOR DEHYDRATION REACTION OF LACTATES, PREPARATION THEREOF, AND PROCESS FOR THE PREPARATION OF ACRYLIC COMPOUNDS FROM LACTATES

摘要

PURPOSE: Calcium phosphate-silica catalysts for the dehydration reaction of lactates, a method for preparing the same, and a method for preparing acrylic compounds based on the lactates are provided to improve the yield of acrylic acids and acrylic esters by continuously dehydrating the lactates. CONSTITUTION: Calcium phosphate-silica catalysts contains 50 to 98 weight% of Calcium phosphate and 2 to 50 weigh% of silica. The calcium phosphate is selected from a group containing Ca_3(PO_4)_2, Ca_2P_2O_7, Ca_5(P_3O_10)_2, and Ca_3(PO_3)_6. The method for preparing the calcium phosphate-silica catalysts contains the following: Calcium phosphate is prepared by mixing a phosphate aqueous solution and a calcium salt aqueous solution. Silica slurry is prepared by mixing silicon salt aqueous solution and an acid aqueous solution. The silicon slurry is mixed with the calcium phosphate. The mixed slurry is filtered and cleaned to form powder. The power is sintered.