Synthesis process for faujasite family zeolites using mother liquor recycle

DETAILED DESCRIPTION What is claimed is: 1.
A process for preparing an aluminosilicate having a faujasite family structure and a composition, in terms of mole ratios of oxides, in the range: 0.
2 to 0.
80 T.
sub.
2 O:0.
20 to 0.
8 Na.
sub.
2 O:Al.
sub.
2 O.
sub.
3 :4 to 15 SiO.
sub.
2 :xH.
sub.
2 O wherein T represents an organic template trapped in supercages of said zeolite and x represents 0 or an integer from 1 to 20, wherein said process comprises: (a) preparing a reaction mixture comprising an oxide of sodium, an organic template, wherein a significant portion of the organic template is derived from templates recycled from earlier preparations, water, a source of combined silica and alumina having Si/Al in the range 5 to 20 and sodium aluminosilicate nucleating seeds, said reaction mixture having a composition, in terms of mole ratios of oxides, within the following ranges:
______________________________________
(Na,T).
sub.
2 O:Al.
sub.
2 O.
sub.
3
3 to 15
SiO.
sub.
2 :Al.
sub.
2 O.
sub.
3
10 to 40
H.
sub.
2 O:Al.
sub.
2 O.
sub.
3
120 to 500
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where T represents the organic template, said seeds 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 substantially form a mixture; (c) maintaining the reaction mixture at between about 80.
degree.
C.
and 160.
degree.
C.
under autogenous pressure for sufficient period of time to form crystals of said aluminosilicate; and (d) recovering said aluminosilicate crystals.
2.
The process of claim 1 wherein the reaction product is ECR-32.
3.
The process of claim 1 wherein the reaction product is ECR-4.
4.
The process of claim 1 wherein reaction product is ECR-30.
5.
The process of claim 1 wherein said reaction product is ECR-35.
6.
A process of claim 1 wherein the alumina source is a spray dried silica-alumina gel having an Si/Al ratio between 8 and 16