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US3849463A Expired / Lapsed US ⏱️ 0.0 years remaining

Prevention of silica pore obstruction in crystalline aluminosilicates

Assignee: Mobil Oil AS
•
Filing: 1972-12-11
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Granted: 1974-11-19
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Expires: 1992-12-11
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Abstract

Abstract 1. A METHOD OF DECREASING SILICA PORE OBSTRUCTION IN CRYSTALLINE ALUMINOSILICATES HAVING A SIO2 A12O3 RATIO GREATER THAN 6 WHICH COMPRISES ADMIXING A CRYSTALLINE ALUMINOSILICATE ZEOLITE REACTION MIXTURE SUFFICIENT TO PREPARE A CRYASTALLINE ALUMINOSILICATE ZEOLITE, SAID REACTION MIXTURE COMPRISING THE FOLLOWING COMPONENTS EXPRESSED AS OXIDES IN THE MOLE RATIOS SET FORTH: NA2OO (R2O+NA2O) .31 TO <1 (R2O+NA2O) SIO2 0.5 RO .90 SIO2 A12O3 3 TOT O 6 H2O (R2O+NA2O) 15 TO 600 WHEREIN R IS A TETRAMETHYLAMMONIUM CATION, WITH AN ALKALI METAL SALT CONTAINING MONOVALENT ANIONS IN AN AMOUNT SUFFICIENT TO DECREASE SILICA PORE ABSTRUCTION, AND MAINTAINING THE MIXTURE UNTIL CRYSTALS HAVING THE X-RAY DIFFRACTION PATTERN VALUES SHOWN IN TABLE 2 OF THE SPECIFICATION ARE FORMED.

Inventors

  • 👤 F Dwyer
  • 👤 P Chu

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 19:20
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/085; B01J29/40; B01J29/70; B01J29/7011; C01B33/2876; Y; Y10; Y10S; Y10S423/00; Y10S423/22; Y10S423/24; Y10S423/25; Y10S423/26; Y10S423/27; Y10S423/38

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 64 words
A METHOD OF DECREASING SILICA PORE OBSTRUCTION IN CRYSTALLINE ALUMINOSILICATES HAVING A SIO2 A12O3 RATIO GREATER THAN 6 WHICH COMPRISES ADMIXING A CRYSTALLINE ALUMINOSILICATE ZEOLITE REACTION MIXTURE SUFFICIENT TO PREPARE A CRYASTALLINE ALUMINOSILICATE ZEOLITE, SAID REACTION MIXTURE COMPRISING THE FOLLOWING COMPONENTS EXPRESSED AS OXIDES IN THE MOLE RATIOS SET FORTH: NA2OO (R2O+NA2O) .31 TO <1 (R2O+NA2O) SIO2 0.5 RO .90 SIO2 A12O3 3 TOT
Claim 2
Independent Claim 64 words
A METHOD OF DECREASING SILICA PORE OBSTRUCTION IN CRYSTALLINE ALUMINOSILICATES HAVING A SIO2 A12O3 RATIO GREATER THAN 6 WHICH COMPRISES ADMIXING A CRYSTALLINE ALUMINOSILICATE ZEOLITE REACTION MIXTURE SUFFICIENT TO PREPARE A CRYASTALLINE ALUMINOSILICATE ZEOLITE, SAID REACTION MIXTURE COMPRISING THE FOLLOWING COMPONENTS EXPRESSED AS OXIDES IN THE MOLE RATIOS SET FORTH: NA2OO (R2O+NA2O) .31 TO <1 (R2O+NA2O) SIO2 0.5 RO .90 SIO2 A12O3 3 TOT

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-11-18 1978-05-20 1978-11-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-11-18 1982-05-20 1982-11-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-11-18 1986-05-20 1986-11-19 $7700.00 Window Closed / Lapsed

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