Abstract: This invention provides a process for simultaneously producing methacrylonitrile and butdiene which comprises contacting a mixture of mixed butenes containing isobutene and n-butenes, oxygen and ammonia as the substantial reactants with a catalyst containing as the active component a composition having the empirical formula Fe.sub.10 Sb.sub.5.sub.-60 Me.sub.0.01.sub.-10 -Te.sub.0.05.sub.-5 X.sub.0.sub.-5 O.sub.20.sub.-225 wherein Me is at least one element selected from the group consisting of V, Mo and W and X represents P and/or B in vapor phase.

Abstract: A process for preparing acrylonitrile from propylene, which comprises contacting a mixture of propylene, molecular oxygen and ammonia in the vapor phase at a temperature of about 380.degree. to about 500.degree. C. and a pressure of about atmospheric pressure to about 3 Kg/cm.sup.2 -G with a catalyst composition comprising active components of the following empirical formulaFe.sub.a Sb.sub.b Me.sub.c Te.sub.d Q.sub.e R.sub.f O.sub.gwhereinMe is at least one element selected from the group consisting of V, Mo and W; Q is at least one element selected from the group consisting of Cu, Mg, Zn, La, Ce, Al, Cr, Mn, Co, Ni, Bi and Sn; and R is at least one element selected from the group consisting of P and B; a, b, c, d, e, f and g each represents atomic ratios, and when a is 10, 15.ltoreq. b .ltoreq.60, 1<c .ltoreq.10, 0.5.ltoreq. d .ltoreq.10, 0.1.ltoreq. e .ltoreq.10, 0.ltoreq. f .ltoreq.

Abstract: A spring prime mover unit comprising a spring prime mover, a transmission gear and a plurality of connectors. Among the connectors, there are rotatable connectors and non-rotary connectors. The rotatable connectors are the ends of some shafts of the transmission gear and the non-rotary connectors are the attachments of a covering frame. The spring prime mover unit may be exchangeably equipped with auxiliary toy parts or toys which have not prime movers and form various movable toys to one prime mover unit. Therefore, children themselves can assemble various interesting movable toys and enjoy various motion of the toys.

Abstract: This invention provides a process for simultaneously producing methacrylonitrile and butadiene which comprises contacting a mixture of mixed butenes containing isobutene and n-butenes, oxygen and ammonia as the substantial reactants with a catalyst containing as the active component a composition having the empirical formula Fe.sub.10.sub.- W.sub.1-30 X.sub.0.01-15 Me.sub.0.01-5 O.sub.12-143 wherein X is at least one element selected from the group consisting of P, B and Te, and Me represents V and/or Mo in vapor phase.