US3846337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphate-silica-aluminosilicate compositions of improved crushing strength and methods of preparing the same
Assignee: Union Oil Company of California
•
Filing: 1972-07-20
•
Granted: 1974-11-05
•
Expires: 1992-07-20
Abstract
Abstract Silica-bonded silicate particles of improved crushing strength are prepared by admixing reactive silica sols with the siliceous particles in an aqueous medium under conditions of temperature and contact time sufficient to at least partially bond the sol and silicate, contacting the resultant combination with ammonium phosphate and/or the acid phosphates of either ammonium or one or more polyvalent metals having atomic radii less than about one angstrom and drying the resultant composite.
Inventors
- 👤 D Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:03
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/183; B01J29/00; B01J29/04; B01J29/06; B01J29/061; B01J37/00; B01J37/0009; C10G35/00; C10G35/04; C10G35/06; C10G35/095; C10G49/00; C10G49/02; C10G49/08; Y; Y10; Y10S; Y10S65/00; Y10S65/901
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
227 words
THE METHOD OF FORMING STRUCTURALLY STABLE SILICA BONDED AGGREGATES OF PARTICULATE SILICATES COMPRISING THE STEPS OF INTIMATELY MIXING SAID SILICATE WITH A COLLODIAL HYDROUS SILICA SOL IN THE PRESENCE OF WATER AT A TEMPERATURE OF AT LEAST ABOUT 40*F AND FOR A PERIOD OF AT LEAST ABOUT 10 MIINUTES SUFFICIENT TO REACT SAID SILICA SOL WITH SAID SILICATE, REACTING WITH THE RESULTANT COMBINATION ABOOUT 1 TO ABOUT 30 WEIGHT PERCENT DETERMINED AS P2O5 OF AT LEAST ONE POLYPHOSPHATE OR POLYPHOSPHATE PRECURSOR CONVERTIBLE TO A POLYPHOSPHAATE AT TEMPERATURE TURES ABOVE ABOUT 180*F AND SELECTED FROM THE GROUP CONSISTING OF PHOSPHORIC ACIDS, AMMONIUM SALTS OF PHOSPHORIC ACIDS AND HYDROGEN AND AMMONIUM PHOSPHATES OF POLYVALENT METAL CATIONS HAVING IONIC RADII LESS THAN ABOUT 1 ANGSTROM, FORMING AGGREGATES OF SAID SILICATE PARTICLES, AND HEATING THE RESULTANT AGGREGAATES AT A TEMPERATURE OF AT LEAST 180*F FOR AT LEAST ABOUT 30 MINUTES WHEREIN SAID SILICATE CONSTITUENTS AT LEAST ABOUT 2 WEIGHT PERCENT OF SAID AGGREGATE ON A DRY WEIGHT BASIS AND IS SELECTED FROM THE GROUP CONSISTING OF SILICA GELS, PHYSICAL MIXTURES AND COGELS OF SOLICA AND ANOTHER REFRACTORY OXIDE, AN CRYSTALLINE ALUMINOSILICATE ZEOLITES COMPRISING AT LEAST ABOUT 50 WEIGHT PERCENT SILICA ON A DRY WEIGHT BASIS, AND SAID SILICA SOL CONSTITUTES ABOUT 5 WEIGHT PERCENT OF SAID AGGREGATE ON A DRY WEIGHT BASIS AND HAS AVERAGE PARTICLE DIAMETER BELOW ABOUT 1 MICRON.
Claim 2
Independent Claim
227 words
THE METHOD OF FORMING STRUCTURALLY STABLE SILICA BONDED AGGREGATES OF PARTICULATE SILICATES COMPRISING THE STEPS OF INTIMATELY MIXING SAID SILICATE WITH A COLLODIAL HYDROUS SILICA SOL IN THE PRESENCE OF WATER AT A TEMPERATURE OF AT LEAST ABOUT 40*F AND FOR A PERIOD OF AT LEAST ABOUT 10 MIINUTES SUFFICIENT TO REACT SAID SILICA SOL WITH SAID SILICATE, REACTING WITH THE RESULTANT COMBINATION ABOOUT 1 TO ABOUT 30 WEIGHT PERCENT DETERMINED AS P2O5 OF AT LEAST ONE POLYPHOSPHATE OR POLYPHOSPHATE PRECURSOR CONVERTIBLE TO A POLYPHOSPHAATE AT TEMPERATURE TURES ABOVE ABOUT 180*F AND SELECTED FROM THE GROUP CONSISTING OF PHOSPHORIC ACIDS, AMMONIUM SALTS OF PHOSPHORIC ACIDS AND HYDROGEN AND AMMONIUM PHOSPHATES OF POLYVALENT METAL CATIONS HAVING IONIC RADII LESS THAN ABOUT 1 ANGSTROM, FORMING AGGREGATES OF SAID SILICATE PARTICLES, AND HEATING THE RESULTANT AGGREGAATES AT A TEMPERATURE OF AT LEAST 180*F FOR AT LEAST ABOUT 30 MINUTES WHEREIN SAID SILICATE CONSTITUENTS AT LEAST ABOUT 2 WEIGHT PERCENT OF SAID AGGREGATE ON A DRY WEIGHT BASIS AND IS SELECTED FROM THE GROUP CONSISTING OF SILICA GELS, PHYSICAL MIXTURES AND COGELS OF SOLICA AND ANOTHER REFRACTORY OXIDE, AN CRYSTALLINE ALUMINOSILICATE ZEOLITES COMPRISING AT LEAST ABOUT 50 WEIGHT PERCENT SILICA ON A DRY WEIGHT BASIS, AND SAID SILICA SOL CONSTITUTES ABOUT 5 WEIGHT PERCENT OF SAID AGGREGATE ON A DRY WEIGHT BASIS AND HAS AVERAGE PARTICLE DIAMETER BELOW ABOUT 1 MICRON.
Claim 3
Dependent Claim
64 words
The method of claim 1 wherein said silicate is a crystalline aluminosilicate zeolite and constitutes at least about 5 weight percent of said aggregate, and said aggregate is heated at a temperature of at least about 200*F and for a period of time sufficient to reduce its water content to a level below about 20 weight percent subsequent to the addition of said phosphate.
Claim 4
Dependent Claim
221 words
The composition consisting essentially of a structurally stable silica-bonded aggregate containing at least about 2 weight percent of a particulate silicate selected from the group consisting of silica gels, physical mixtures and cogels of silica and another refractory oxide, and crystalline aluminosilicates, and an amount of phosphorus corresponding to about 1 to about 30 weight percent P2O5, formed by the method consisting essentially of the steps of reacting a mixture of said silicate and a colloidal hydrous silica sol in the presence of water at a temperature of at least about 40*F for a period of at least about 10 minutes sufficient to react said silica sol with said silicate, said silica sol having a average particle diameter below about 1 micron and constituting at least about 5 weight percent of said aggregate on a dry weight basis, admixing with the resultant combination about 1 to about 30 weight percent determined as P2O5 of a polyphosphate or polyphosphate precursor convertible to a polypHosphate at elevated temperature selected from the group consisting of phosphoric acids, ammonium salts of phosphoric acids, and hydrogen and ammonium phosphates of polyvalent metal cations having ionic radii less than about 1 angstrom, forming aggregates of said silicate particles, and drying the resultant combination at a temperature of at least about 200*F for at least about 30 minutes.
Claim 5
Dependent Claim
221 words
The composition consisting essentially of a structurally stable silica-bonded aggregate containing at least about 2 weight percent of a particulate silicate selected from the group consisting of silica gels, physical mixtures and cogels of silica and another refractory oxide, and crystalline aluminosilicates, and an amount of phosphorus corresponding to about 1 to about 30 weight percent P2O5, formed by the method consisting essentially of the steps of reacting a mixture of said silicate and a colloidal hydrous silica sol in the presence of water at a temperature of at least about 40*F for a period of at least about 10 minutes sufficient to react said silica sol with said silicate, said silica sol having a average particle diameter below about 1 micron and constituting at least about 5 weight percent of said aggregate on a dry weight basis, admixing with the resultant combination about 1 to about 30 weight percent determined as P2O5 of a polyphosphate or polyphosphate precursor convertible to a polypHosphate at elevated temperature selected from the group consisting of phosphoric acids, ammonium salts of phosphoric acids, and hydrogen and ammonium phosphates of polyvalent metal cations having ionic radii less than about 1 angstrom, forming aggregates of said silicate particles, and drying the resultant combination at a temperature of at least about 200*F for at least about 30 minutes.
Claim 6
Dependent Claim
44 words
The composition of claim 3 wherein said silicate is a crystalline aluminosilicate zeolite comprising at least about 50 weight percent silica having a average particle diameter less than about 50 microns, and said zeolite constitutes at least about 5 weight percent of said aggregate.
Claim 7
Dependent Claim
37 words
The composition of claim 3 further comprising a catalytic amount of at least one of the metals, metal oxides and metal sulfides of Periodic Groups II, IV, V, VI, and VIII and the actinide and Lanthanide series.
Claim 8
Dependent Claim
129 words
The composition of claim 3 wherein said particulate silicate is a crystalline aluminosilicate zeolite containing at least about 50 weight-percent silica on a dry weight basis having a average particle diameter less than about 50 microns, said zeolite constitutes at least 5 weight-percent of said aggregate on a dry weight basis, and said aggregate is formed by the method consisting essentially of reacting said combination of particulate silicate and said silica sol at a temperature of at least about 60*F for at least about 10 minutes, adding said phosphate to said combination, forming aggregates of said silicate particles, and heating said aggregates at a temperature of at least about 200*F for a period sufficient to reduce the water content of said aggregates to less than about 20 weight percent.
Claim 9
Dependent Claim
100 words
The composition of claim 4 consisting essentially of said zeolite, said colloidal silica sol, and said phosphate, wherein said combination of said particulate silicate and said silica sol is reacted at a temperature of at least about 60*F for a period of at least about 10 minutes prior to the addition of said phosphate, and the combination of said particulate silicate, silica sol and phosphate is thermally treated at a temperature of at least about 200*F for a period of at least about 30 minutes sufficient to reduce the water content of said aggregate to less than about 10 weight-percent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |