Process for preparing a high silica faujasite aluminosilicate, ECR-4

Claim 2

A process for preparing an aluminosilicate having a faujasite structure, a silica to alumina mole ratio of at least five, and ions within the super cages of said aluminosilicate selected from the group consisting of bis-(2-hydroxyethyl)dimethylammonium ions and bis-(2-hydroxypropyl)dimethylammonium ions which comprises the steps of: (a) preparing a reaction mixture comprising sodium aluminate, alum, water, sodium silicate, aluminum sulfate, an organic template and nucleating seeds of about the composition 13.33 Na 2 O:Al 2 O 3 :12.5SiO 2 :267H 2 O, said reaction mixture having a composition, in terms of mole ratios of oxides, within the following ranges: (Na,T) 2 O:Al 2 O 3 : 1.6 to 8 SiO 2 :Al 2 O 3 : 4 to 20 H 2 O:Al 2 O 3 : 100 to 400 wherein T represents a bis-(2-hydroxyethyl)dimethyl-ammonium or bis-(2-hydroxypropyl)dimethylammonium group, and said seeds being present in an amount to yield 0.1 to 10 mole percent of the total final alumina content in said aluminosilicate; (b) blending the reaction mixture sufficiently to form a substantially homogeneous mixture; (c) maintaining the reaction mixture between 90° and 120° C. under autogenous pressure for a sufficient period of time to form crystals of said aluminosilicate; and (d) recovering said aluminosilicate crystals.

Claim 3

The process of claim 1 wherein the aluminosilicate has a composition, in terms of mole ratios of oxides, in the range: 0.02 to 0.40 T.sub.2 O:0.06 to 0.98 Na.sub.2 O:Al.sub.2 O.sub.3 :6 to 8 SiO.sub.2 :xH.sub.2 O wherein T represents a bis-(2-hydroxypropyl)dimethyl-ammonium group and x represents 0 or an integer from 1 to 25.

Claim 4

A process for the preparation of an aluminosilicate having a faujasite structure and a composition in terms of mole ratios of oxides as follows: 0.02 to 0.40 T 2 O: 0.06 to 0.98 Na 2 O: Al 2 O 3 : 6 to 8SiO 2 : xH 2 O wherein T is located within the supercages of the aluminosilicate and T is selected from the group consisting of bis-(2-hydroxyethyl)dimethylammonium ions and bis-(2-hydroxypropyl)dimethylammonium ions and x represents 0 or an integer from 1 to 25 which comprises: (a) preparing a reaction mixture comprising an oxide of sodium, an organic template, T, water, a source of silica, a source of alumina, and sodium aluminosilicate nucleating seeds, said reaction mixture having a composition in terms of mole ratios of oxides, within the following ranges: (Na,T) 2 O: Al 2 O 3 :1.6 to 8 SiO 2: Al 2 O 3 :4 to 20 H 2 O: Al 2 O 3 :100 to 400 and said seeds being present in an amount to yield 0.1 to 10 mole percent of the total final alumina content in said aluminosilicate; (b) blending the reaction mixture sufficiently to form a substantially homogenous mixture; (c) maintaining the reacting mixture at between about 70° C. and 120° C. under antogenous pressure for a sufficient period of time to form crystals of said aluminosilicate; and (d) recovering said aluminosilicate crystals.

Claim 5

A process for the preparation of an aluminosilicate having a faujasite structure and a composition in terms of mole ratios of oxides as follows: 0.02 to 0.40 T 2 O: 0.06 to 0.98 Na 2 O: Al 2 O 3 : 6 to 8SiO 2 : xH 2 O wherein T is located within the supercages of the aluminosilicate and T is selected from the group consisting of bis-(2-hydroxyethyl)dimethylammonium ions and bis-(2-hydroxypropyl)dimethylammonium ions and x represents 0 or an integer from 1 to 25 which comprises: (a) preparing a reaction mixture comprising an oxide of sodium, an organic template, T, water, a source of silica, a source of alumina, and sodium aluminosilicate nucleating seeds, said reaction mixture having a composition in terms of mole ratios of oxides, within the following ranges: (Na,T) 2 O: Al 2 O 3 :1.6 to 8 SiO 2: Al 2 O 3 :4 to 20 H 2 O: Al 2 O 3 :100 to 400 and said seeds being present in an amount to yield 0.1 to 10 mole percent of the total final alumina content in said aluminosilicate; (b) blending the reaction mixture sufficiently to form a substantially homogenous mixture; (c) maintaining the reacting mixture at between about 70° C. and 120° C. under antogenous pressure for a sufficient period of time to form crystals of said aluminosilicate; and (d) recovering said aluminosilicate crystals.