Crystalline group IVA metal-containing molecular sieve compositions

A process for preparing a crystalline Group IVA metal containing molecular sieves having a composition in terms of mole ratio of oxides in the synthetized and anhydrous state of:

• A(M.sub.2 O):B(XO.sub.2):C(SiO.sub.2):D(P.sub.2 O.sub.5)
• wherein
• M is an alkali metal;
• X is a Group IVA metal selected from the group consisting of titanium, zirconium, hafnium, and mixtures thereof;
• A/B is a number from about 0.1 to about 2.0;
• C/B is a number greater than 0 to about 3.0;
• and
• D/B is a number from 0 to about 3.0, said process
• said process comprising forming a mixture of appropriate sources selected from the group consisting of a source of Group IVa metal, a source of silica and a source of phosphorous;
• stirring said mixture;
• adding to said mixture an alkali cation source to form a reaction solution;
• heating said reaction mixture at a temperature of at least 100.degree. C. under autogenous pressure until crystals are formed;
• and recovering said crystals from said reaction mixture, said crystals having a powder x-ray diffraction pattern observed with Cu k.alpha. radiation and a scan of 4.degree. to 68.degree. 2.theta. of at least the d-spacings set forth in the following Table A which were measured relative to an internal standard:
• TABLE A ______________________________________ d(.ANG.) ______________________________________ 7.8 .+-. 0.4 5.5 .+-. 0.2 4.5 .+-. 0.2 3.9 .+-. 0.2 3.2 .+-. 0.1 2.7 .+-. 0.1 2.6 .+-. 0.1 2.4 .+-. 0.1 2.33 .+-. 0.05 2.23 .+-. 0.05 1.94 .+-. 0.05 1.88 .+-. 0.05 1.83 .+-. 0.02 1.74 .+-. 0.02 1.65 .+-. 0.02 1.58 .+-. 0.02 1.54 .+-. 0.02 1.50 .+-. 0.02 1.41 .+-. 0.02 ______________________________________