such as bentonite or kaolin or other binders well known in the art typically the zincosilicate is incorporated within a matrix material by blending with a sol of the matrix material and gelling the resulting mixture or slurrying the sieve with the matrix material and drying also solid particles of the zincosilicate and matrix material can be physically admixed typically such zincosilicate compositions can be pelletized or extruded into useful shapes the crystalline zincosilicate content can vary anywhere from a few up to 100 wt of the total composition catalytic compositions can contain about 0 1 wt to about 100 wt crystalline zincosilicate material and preferably contain about 10 wt to about 95 wt of such material and most preferably contain about 20 wt to about 80 wt of such material more specifically catalytic compositions comprising the crystalline zincosilicate material of this invention and a suitable matrix material are formed by adding a finely divided crystalline zincosilicate sieve to an aqueous sol or gel of the matrix material such as phf alumina made by american cyanamid co the resulting mixture is thoroughly blended and gelled typically by adding a material such as ammonium hydroxide the resulting gel is dried below about 200 u00b0 c more preferably between about 100 u00b0 c and about 150 u00b0 c and calcined between about 350 u00b0 c and about 700 u00b0 c to form a catalyst.