51 results about "BUTYL LACTATE" patented technology

The invention relates to a molecular sieve modified catalyst and a preparation method. The catalyst comprises a main catalyst A and an auxiliary catalyst B, wherein the main catalyst A comprises X-type, Y-type, ZSM-6type and ZSM-8-type molecular sieves, and the auxiliary catalyst B comprises nitrates of Ca (NO3)2, La (NO3)3, KNO3, Cu(NO3)2 and Co(NO3)2; the mass ratio of metal ions in the catalyst B to the catalyst A is 1%-5%. The preparation method comprises the following steps: weighting quantitative components A and B; adding a certain amount of deionized water; acutely stirring in a waterbath at 80 DEG C for 6h; soaking for 4h; drying a filter cake in an oven at 120 DEG C until free water is dried; baking the dried catalysts in a muffle furnace at 200-600 DEG C for 4-8h; and tabletting, grinding and sieving the cooled catalysts on a standard sieve to obtain a catalyst of 18-35 meshes. The method for preparing acrylic ester by catalyzing butyl lactate and methanol with the catalysts is carried out under the conditions that the mol ratio of raw materials is 0.5: (1-4):1, the temperature is 300-400 DEG C, the reaction pressure is normal pressure, and the airspeed is 1-4h-1. The specific surface area of the catalyst is increased by load metal ions, and the amplification of pore volumes is beneficial to the operation of the reaction.