ZINC FERRITE CATALYSTS, METHOD OF PREPARING THEREOF AND METHOD OF PREPARING 1,3-BUTADIENE USING THEREOF

摘要

A preparation method is provided to prepare a zinc ferrite catalyst of which components are simple, and which is synthesized easily and advantageous in securing of reproducibility as a catalyst for producing 1,3-butadiene, and a method of producing 1,3-butadiene by performing an oxidative dehydrogenation on the zinc ferrite catalyst by directly using a C4 mixture as a reactant without performing an additional separation process is provided. A method of preparing a zinc ferrite catalyst for the production of 1,3-butadiene comprises the steps of: (a) dissolving a zinc precursor and an iron precursor into distilled water; (b) adjusting a pH range of a coprecipitation solution to 6 to 10 while mixing a basic solution with a mole concentration of 1.5 to 4.0 with the aqueous precursor solution; (c) filtering the pH-adjusted mixed solution to obtain a solid catalyst; (d) drying the solid catalyst at 70 to 200 deg.C; and (e) heat-treating the dried catalyst at 350 to 800 deg.C. A method of producing 1,3-butadiene comprises the steps of: (a) providing a mixed gas of a C4 mixture, air, and steam as a reactant; (b) performing an oxidative dehydrogenation by continuously passing the reactant through a catalyst layer to which the zinc ferrite catalyst for the production of 1,3-butadiene is fixed; and (c) obtaining 1,3-butadiene. Further, an atomic ratio of Fe/Zn of the zinc precursor and the iron precursor is 1.5 to 2.5, and the basic solution is sodium hydroxide.