PREPARATION METHOD OF ALKENE

摘要

PURPOSE: A preparation method of alkene is provided to prepare an alkene at a low temperature and at a low cost by bringing an alkane into contact with a catalytic composition containing a specific heteropolyacid. CONSTITUTION: The preparation method comprises contacting alkane with (A) a heteropolyacid of formula(1):H(e'-bz')Gb(Xk'Mm'-X'MX'Mn'Oy')¬-e' on (B) a polyoxometalate carrier of formula(2):CaH(e-az)(XkMm-xM1xM2nOy)¬-e. In the formula(1), G is a group 1-16 element or a hydroxy ion; z' is an electric charge of G; (b) is 0-12; (k') is 1-5; (m') is 5-20; (x') is 0-6; (n') is 0-3; (y') is 18-62; (e') is an electric charge of polyoxometalate anion. In the formula(2), C is a cation such as K and Rb; X is a group 3-16 element; M is Mo or W; M1 is V; M2 is a transition metal other than M and M1; (z) is an electric charge of C; (k) is 1-5; (m) is 5-20; (x) is 0-6; (n) is 0-3; (y) is 18-62; (e) is an electric charge of polyoxometalate. The heteropolyacid is present in an amount capable of covering less than 100% of the surface area of polyoxometalate. The temperature for converting the alkane to the alkene is preferably 225-450 deg.C.