Process for the preparation of zeolite Beta using dibenzyldimethylammonium ions and the product produced
AssigneeMobil Oil Corporation
InventorsRobert B. Calvert, Clarence D. Chang, Mae K. Rubin, Ernest W. Valyocsik
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Abstract
This invention relates to a new and improved form of crystalline silicate having the structure of zeolite Beta, to a new and useful improvement in synthesizing said crystalline silicate and to use of said crystalline silicate prepared in accordance herewith as a catalyst for organic compound, e.g. hydrocarbon compound, conversion.
Claims14
A method for synthesizing a crystalline silicate consisting essentially of one having the structure of zeolite Beta which comprises (i) preparing a reaction mixture capable of forming said crystalline silicate, said mixture comprising sources of alkali metal ions (M), dibenzyldimethylammonium ions (R), an oxide of silicon, water and an oxide of aluminum and having a composition, in terms of mole ratios, within the following ranges:
- SiO.sub.2 /Al.sub.2 O.sub.3 =20-250
- H.sub.2 O/SiO.sub.2 =10-200
- OH/SiO.sub.2 =0.10-2.0
- M/SiO.sub.2 =0.05-1.0
- R/SiO.sub.2 =0.10-2.0,
- (ii) maintaining the reaction mixture at conditions sufficient to crystallize said silicate, including a temperature of from about 80.degree. C. to about 175.degree. C., and (iii) recovering said crystalline silicate from step (ii), said recovered crystalline silicate containing dibenzyldimethylammonium and alkali metal.
A crystalline silicate having the structure of zeolite Beta and containing dibenzyldimethylammonium and alkali metal synthesized by a method which comprises (i) preparing a reaction mixture capable of forming said crystalline silicate, said mixture comprising sources of alkali metal ions (M), dibenzyldimethylammonium ions (R), an oxide of silicon, water and an oxide of aluminum and having a composition in terms of mole ratios as follows:
- SiO.sub.2 /Al.sub.2 O.sub.3 =20-250
- H.sub.2 O/SiO.sub.2 =10-200
- OH/SiO.sub.2 =0.10-2.0
- M/SiO.sub.2 =0.05-1.0
- R/SiO.sub.2 =0.10-2.0,
- (ii) maintaining the reaction mixture at conditions sufficient to crystallize said silicate, and (iii) recovering said crystalline silicate from step (ii), said recovered crysalline silicate containing dibenzyldimethylammonium and alkali metal.
Dibenzyldimethylammonium-containing zeolite Beta.
Dependencies are inferred from the claim text.