Heat resistant catalyst and method of producing the same
AssigneeCatalysts and Chemicals Inc., Far East
InventorHiromichi Arai
Life of this patent
Estimating the term…
Abstract
Excellent heat resistant high activity catalyst which retains catalyst activity at high temperatures of not less than about 1,200.degree. C. is provided.
Claims19
A heat resistant catalyst consisting essentially of compositions of the formula Al.sub.1-z C.sub.z B.sub.x Al.sub.12-y O.sub.19-.alpha. wherein, A is at least one element selected from the group consisting of Ba, Ca and Sr, C is K and/or Rb, B is at least one element selected from the group of Mn, Co, Fe, Ni, Cu and Cr, z is a value in a range of 0- about 0.4, x is a value in a range of about 0.1-4, is a value in a range of x-2x and .alpha. is a value which is determined by the valency X, Y, and Z of the respective element A, C and B and the value of x, y and z and is shown as .alpha.=1-1/2{X-z(X-Y)+xZ-3Y}.
A method of producing a heat resistant catalyst comprising, dissolving and mixing a water soluble and/or alcohol soluble aluminum compound, a water soluble and/or alcohol soluble compound of element A selected from the group consisting of Ca, Ba and Sr, a water soluble and/or alcohol soluble compound of element C selected from the group consisting of K and Rb, a water soluble and/or alcohol soluble compound of element B selected from the group consisting of Mn, Co, Fe, Ni, Cu and Cr in at least one solvent selected from the group consisting of water and alcohol in a (B+Al):
- (A+C):
- B:C atomic ratio of about 100:
- (7-10):
- (4.2-16.7):
- (0-3.3) to effect precipitation, hydrolysis and/or thermal decomposition, forming a product in the solution, separating the product from the solution and calcining the product at a temperature of not less than 900.degree. C.
Dependencies are inferred from the claim text.