Process for producing a crystalline galliosilicate with the faujasite structure
AssigneeUnion Oil Company of California
InventorMario L. Occelli
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Abstract
A crystalline, galliosilicate molecular sieve having the faujasite structure is synthesized by mixing a hydrogel having the following oxide mole ratios of components: SiO.sub.2 /Ga.sub.2 O.sub.3 =6 to 15 Na.sub.2 O/Ga.sub.2 O.sub.3 =1 to 5 H.sub.2 O/Ga.sub.2 O.sub.3 =80 to 500 with a clear galliosilicate solution having the following oxide mole ratios of components: SiO.sub.2 /Ga.sub.2 O.sub.3 =5 to 30 Na.sub.2 O/Ga.sub.2 O.sub.3 =6 to 20 H.sub.2 O/Ga.sub.2 O.sub.3 =200 to 800 to form a mixture. The resultant mixture is then crystallized without stirring at a temperature below about 150.degree. C. to form the galliosilicate molecular sieve with the faujasite structure.
Claims23
A process for preparing a crystalline, galliosilicate molecular sieve having the faujasite structure which comprises:
- (a) mixing a source of gallia, a source of silica, a source of sodium and water to form a hydrogel having the following oxide mole ratios of components
- SiO.sub.2 /Ga.sub.2 O.sub.3 =6 to 15
- Na.sub.2 O/Ga.sub.2 O.sub.3 =1 to 5
- H.sub.2 O/Ga.sub.2 O.sub.3 =80 to 500
- (b) adding to said hydrogel a galliosilicate solution substantially free of alumina and dispersed particles, said solution having the following oxide mole ratios of components
- SiO.sub.2 /Ga.sub.2 O.sub.3 =5 to 30
- Na.sub.2 O/Ga.sub.2 O.sub.3 =6 to 20
- H.sub.2 O/Ga.sub.2 O.sub.3 =200 to 800
- to form a mixture of said solution and said hydrogel, said mixture having oxide mole ratios of components falling within the same ranges as the oxide mole ratios of components in said hydrogel and wherein said solution is prepared by mixing a source of gallia, a source of silica, a source of sodium and water;
- and
- (c) crystallizing said mixture in the absence of stirring at a temperature below about 150.degree. C. to form a galliosilicate molecular sieve having the faujasite structure and containing less than about 0.2 weight percent alumina.
A process for preparing a crystalline, galliosilicate molecular sieve having the faujasite structure which comprises:
- oxide mole
- (a) mixing a hydrogel having the following ratios of components
- SiO.sub.2 /Ga.sub.2 O.sub.3 =6 to 15
- Na.sub.2 O/Ga.sub.2 O.sub.3 =1 to 5
- H.sub.2 O/Ga.sub.2 O.sub.3 =80 to 500
- with a galliosilicate solution substantially free of alumina and dispersed particles, said solution having the following oxide mole ratios of components
- SiO.sub.2 /Ga.sub.2 O.sub.3 =5 to 30
- Na.sub.2 O/Ga.sub.2 O.sub.3 =6 to 20
- H.sub.2 O/Ga.sub.2 O.sub.3 =200 to 800
- to form a mixture of said hydrogel and said solution, said mixture having oxide mole ratios of components falling within the same ranges as the oxide mole ratios of components in said hydrogel;
- (b) crystallizing said mixture at a temperature between about 70.degree. C. and about 150.degree. C. in the absence of stirring to form a galliosilicate molecular sieve having the faujasite structure and containing less than about 0.2 weight percent alumina.
A process for preparing a crystalline, galliosilicate molecular sieve having the faujasite structure which consists essentially of:
- (a) mixing a hydrogel having the following oxide mole ratios of components
- SiO.sub.2 /Ga.sub.2 O.sub.3 =6 to 15
- Na.sub.2 O/Ga.sub.2 O.sub.3 =1 to 5
- H.sub.2 O/Ga.sub.2 O.sub.3 =80 to 500
- with a galliosilicate solution substantially free of alumina and dispersed particles, said solution having the following oxide mole ratios of components
- SiO.sub.2 /Ga.sub.2 O.sub.3 =5 to 30
- Na.sub.2 O/Ga.sub.2 O.sub.3 =6 to 20
- H.sub.2 O/Ga.sub.2 O.sub.3 =200 to 800
- to form a mixture of said hydrogel and said solution, said mixture having oxide mole ratios of components falling within the same ranges as the oxide mole ratios of components in said hydrogel;
- and
- (b) crystallizing said mixture at a temperature between about 70.degree. C. and about 150.degree. C. in the absence of stirring to form a galliosilicate molecular sieve having the faujasite structure and containing less than about 0.2 weight percent alumina.
Dependencies are inferred from the claim text.