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US3649178A Expired / Lapsed US ⏱️ 0.0 years remaining

Synthesis of sodium zeolite w-z

Assignee: Wyeth Holdings LLC
•
Filing: 1969-04-17
•
Granted: 1972-03-14
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Expires: 1989-04-17
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Abstract

Abstract Sodium Zeolite W-Z and a process for making sodium Zeolite W-Z having the chemical formula: 1.0 + OR - 0.1 Na2O.Al2O3. 5.75 + OR - 0.55 SiO2.YH2O wherein Y is a number from 0 to 7 which comprises mixing sodium hydroxide, a source of silica, a source of alumina and water in the following mole ratios: Na2O/SiO2 0.8 to 1.9 SiO2/Al2O3 10.0 to 35.0 H2O/Na2O 100.0 to 160.0 TO OBTAIN A GEL-FORM MIXTURE, DIGESTING THE GEL MIXTURE FOR A PERIOD OF TIME FROM 12 TO 200 HOURS, HEATING THE DIGESTED MIXTURE AT A TEMPERATURE OF FROM 50* TO 150* C. for from 1 to 5 days and recovering sodium Zeolite W-Z. Sodium Zeolite W-Z can be ionexchanged to obtain a crystalline aluminosilicate having catalytic activity for use in hydrocarbon conversion processes.

Inventors

  • 👤 Rong Wang
  • 👤 Jacob Michael Zielonka

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 01:58
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/70; C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2869

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 2 words
0$NA2O.AL2O3.5.75.0.55 SIO2.YHIO
Claim 2
Dependent Claim 2 words
0$NA2O.AL2O3.5.75.0.55 SIO2.YHIO
Claim 3
Dependent Claim 15 words
The process of claim 1 wherein the source of silica is an aqueous silica suspension.
Claim 4
Dependent Claim 13 words
The process of claim 1 wherein the source of alumina is sodium aluminate.
Claim 5
Dependent Claim 13 words
The process of claim 1 wherein the source of alumina is aluminum metal.

References Cited (Backward Citations)

US2882244A Cited
US3054657A Cited
US3459501A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-03-14 1975-09-13 1976-03-14 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-03-14 1979-09-13 1980-03-14 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-03-14 1983-09-13 1984-03-14 $7700.00 Window Closed / Lapsed

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