Crystalline zeolite Upsilon and process for preparing same

Claim 2

A synthetic crystalline zeolitic molecular sieve having a composition expressed in terms of mole ratios of oxides as follows: 0.9±0.1M.sub.2/n O:Al.sub.2 O.sub.3 :2.4-3.4SiO.sub.2 :0-4.5H.sub.2 O, wherein "M" is at least one or a mixture of two or more of hydrogen, ammonium or metal cations having a valence of "n," said zeolitic molecular sieve in its sodium cation form having an X-ray powder diffraction pattern containing at least those d-spacings set forth in Table B.

Claim 3

Composition according to claim 1 wherein "M" represents the sodium cation.

Claim 4

A process for preparing the synthetic crystalline zeolite described in claim 2, which comprises preparing an aqueous sodium aluminosilicate reactant mixture having a composition expressed in terms of mole-ratios of oxides falling within the following ranges: Na 2 O/SiO 2 --0.80 to 1.4 SiO 2 /Al 2 O 3 --3.0 to 7 H 2 O/Na 2 O--32 to 50, wherein the major source of silica in said mixture is a solid reactive amorphous silica, said mixture also containing from 0.5 to 2.5 weight percent Fe 2 O 3 , based on the weight silica therein, maintaining said mixture at temperature of about 100° C. until crystals are formed, and separating the crystals from the mother liquor.

Claim 5

A process for preparing the synthetic crystalline zeolite described in claim 2, which comprises preparing an aqueous sodium aluminosilicate reactant mixture having a composition expressed in terms of mole-ratios of oxides falling within the following ranges: Na 2 O/SiO 2 --0.80 to 1.4 SiO 2 /Al 2 O 3 --3.0 to 7 H 2 O/Na 2 O--32 to 50, wherein the major source of silica in said mixture is sodium silicate, said mixture also containing from about 0.5 to 1.0 mole of Cr 2 O 3 per mole of Al 2 O 3 therein, maintaining said mixture at temperature of about 100° C. until crystals are formed, and separating the crystals from the mother liquor.