Complex Oxide Catalyst of Bi/Mo/Fe for the Oxidative Dehydrogenation of 1-Butene to 1,3-Butadiene and Process Thereof

Abstract

The present invention relates to a complex oxide catalyst of Bi/Mo/Fe and an oxidative dehydrogenation of 1-butene in the presence of a catalyst herein. A catalyst of the present invention is superior to the conventional Bi/Mo catalyst in thermal and mechanical stabilities, conversion and selectivity toward 1,3-butadiene, while showing a long-term catalytic activity.

What is claimed is: 
     
         1 . A process of preparing Bi/Mo/Fe complex metal oxide catalyst for the preparation of 1,3-butadiene, the process comprising:
 (a) mixing a Bi precursor solution and a Fe precursor solution;   (b) adding the mixed solution to a Mo precursor solution and adjusting the pH with a basic solution;   (c) conducting a hydrothermal reaction of the pH-adjusted solution to provide a product of the hydrothermal reaction; and   (d) drying and calcining the product.   
     
     
         2 . The process of  claim 1 , wherein the Bi precursor solution is a mixed solution of bismuth nitrate (Bi(NO 3 ) 3 .5H 2 O) and nitric acid; or a mixed solution of bismuth acetate (Bi(CH 3 CO 2 ) 3 ) and acetic acid. 
     
     
         3 . The process of  claim 1 , wherein the Fe precursor solution is a mixed solution of iron nitrate (Fe(NO 3 ) 3 .9H 2 O) and nitric acid; or a mixed solution of iron chloride (FeCl 2 .4H 2 O) and hydrochloric acid.) 
     
     
         4 . The process of  claim 1 , wherein the Mo precursor solution is a mixed solution comprising ammonium molybdate ((NH 4 ) 6 Mo 7 O 24 .4H 2 O). 
     
     
         5 . The process of  claim 1 , wherein the basic solution is one or more selected from the group consisting of ammonia water, sodium carbonate and potassium carbonate solution. 
     
     
         6 . The process of  claim 1 , wherein the value is adjusted in the range of 3-9. 
     
     
         7 . The process of  claim 1 , wherein the BMF catalyst is calcined at 450-750° C. 
     
     
         8 . The process of  claim 1 , wherein the oxidative dehydrogenation is conducted at 350-450° C. and a WHSV of 1.0-5.0.