US4310441A
Expired / Lapsed
US
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Large pore silica-alumina gels and method of producing the same
Assignee: HARSHAW/FILTROL PARTNERSHIP A PARTNERSHIP OF
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Filing: 1979-10-04
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Granted: 1982-01-12
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Expires: 1999-10-04
Abstract
Abstract A silica-alumina gel derived from a cationic aluminum source and also an anionic aluminum source and processes for producing such gel.
Inventors
- 👤 Hamid Alafandi
- 👤 Dennis Stamires
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:06
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; B; B01; B01J; B01J21/00; B01J21/12; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/084; C10G11/05
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
106 words
A silica-alumina gel having a nominal SiO 2 to Al 2 O 3 mole ratio in the range of about 1 to about 3 and having a pore structure such that the desorption pore volume in the range of pores 20 to 600 Angstroms diameter is about 0.6 or more cc/gr and the desorption pore volume in the range of pores of 20 to 50 Angstroms diameter is less than about 50% of the said desorption pore volume in the pores of 20 to 600 Angstroms and substantially less than the desorption pore volume in the pores in the range of 50 to 200 Angstroms diameter.
Claim 2
Dependent Claim
106 words
A silica-alumina gel having a nominal SiO 2 to Al 2 O 3 mole ratio in the range of about 1 to about 3 and having a pore structure such that the desorption pore volume in the range of pores 20 to 600 Angstroms diameter is about 0.6 or more cc/gr and the desorption pore volume in the range of pores of 20 to 50 Angstroms diameter is less than about 50% of the said desorption pore volume in the pores of 20 to 600 Angstroms and substantially less than the desorption pore volume in the pores in the range of 50 to 200 Angstroms diameter.
Claim 3
Dependent Claim
52 words
The silica-alumina gel of claim 1 in which the ratio of the desorption pore volume of the pores in the range of the 50 to 200 Angstroms is more than 20% and less than 75% of the desorption pore volume in the pores in the range of 20 to 600 Angstroms diameter.
Claim 4
Dependent Claim
47 words
The gel of claim 1 ratio of the desorption pore volume in the pores in range of the 20-50 Angstrom diameter to the desorption pore volume in the pores in the range of 50-200 Angstroms diameter range is in the range of about 0.1 to about 0.8.
Claim 5
Dependent Claim
65 words
The gel of claim 3, in which the ratio of the desorption pore volume in the pores in the range of 20 to 50 Angstrom diameter to the desorption pore volume in the pores in the range of 50 to 200 Angstrom diameter is more than 20% and less than 75% of the desorption pore volume in the range of 20 to 600 Angstrom diameter.
Claim 6
Dependent Claim
125 words
A process of producing a silica-alumina gel which comprises combining in a reaction mixture, sodium silicate, with an anionic aluminum and a cationic aluminum in amounts equivalent to a ratio of the moles of SiO 2 to the moles of Al 2 O 3 in the cationic and anionic aluminum in the range of about 1 to about 3 moles of SiO 2 per mole of Al 2 O 3 and the equivalent weight of Al 2 O 3 in the anionic aluminum being less than 95% and more than 50% of the total equivalent weight of Al 2 O 3 in the cationic and anionic aluminum source and adjusting the pH of the reaction mixture to a range of about 8 to about 9.
Claim 7
Dependent Claim
125 words
A process of producing a silica-alumina gel which comprises combining in a reaction mixture, sodium silicate, with an anionic aluminum and a cationic aluminum in amounts equivalent to a ratio of the moles of SiO 2 to the moles of Al 2 O 3 in the cationic and anionic aluminum in the range of about 1 to about 3 moles of SiO 2 per mole of Al 2 O 3 and the equivalent weight of Al 2 O 3 in the anionic aluminum being less than 95% and more than 50% of the total equivalent weight of Al 2 O 3 in the cationic and anionic aluminum source and adjusting the pH of the reaction mixture to a range of about 8 to about 9.
Claim 8
Dependent Claim
37 words
The process of claim 5, in which the equivalent weight of the Al 2 O 3 in the anionic aluminum is from about 60% to about 95% of the equivalent weight in the cationic and anionic aluminum.
Claim 9
Dependent Claim
25 words
The process of claim 5 in which the anionic aluminum is sodium aluminate and the cationic aluminum is an aluminum salt of a mineral acid.
Claim 10
Dependent Claim
25 words
The process of claim 6, in which the anionic aluminum is sodium aluminate and the cationic aluminum is an aluminum salt of a mineral acid.
Claim 11
Independent Claim
124 words
A method of producing a silica-alumina gel which comprises mixing sodium silicate with an anionic aluminum and mixing said mixture with a cationic aluminum in amounts equivalent to a ratio of the moles of SiO 2 to the moles of Al 2 O 3 in the cationic and anionic aluminum in the range of about 1 to about 3 moles of SiO 2 per mole of Al 2`O 3 and the equivalent weight of Al 2 O 3 in the anionic aluminum being less than 95% and more than 50% of the total equivalent weight of Al 2 O 3 in the cationic and anionic aluminum source and adjusting the pH of the reaction mixture to a range of about 8 to about 9.
Claim 12
Independent Claim
124 words
A method of producing a silica-alumina gel which comprises mixing sodium silicate with an anionic aluminum and mixing said mixture with a cationic aluminum in amounts equivalent to a ratio of the moles of SiO 2 to the moles of Al 2 O 3 in the cationic and anionic aluminum in the range of about 1 to about 3 moles of SiO 2 per mole of Al 2`O 3 and the equivalent weight of Al 2 O 3 in the anionic aluminum being less than 95% and more than 50% of the total equivalent weight of Al 2 O 3 in the cationic and anionic aluminum source and adjusting the pH of the reaction mixture to a range of about 8 to about 9.
Claim 13
Dependent Claim
37 words
The process of claim 9 in which the equivalent weight of the Al 2 O 3 in the anionic aluminum is from about 60% to about 95% of the equivalent weight in the cationic and anionic aluminum.
Claim 14
Dependent Claim
25 words
The process of claim 9, in which the anionic aluminum is sodium aluminate and the cationic aluminum is an aluminum salt of a mineral acid.
Claim 15
Dependent Claim
25 words
The process of claim 10, in which the anionic aluminum is sodium aluminate and the cationic aluminum is an aluminum salt of a mineral acid.
Claim 16
Independent Claim
136 words
A method of producing a silica-alumina gel which comprises combining sodium silicate with a mixture of an anionic aluminum and a cationic aluminum to form a reaction mixture in which the amounts of the reaction times are equivalent to a ratio of the moles of SiO 2 to the moles of Al 2 O 3 in the cationic and anionic aluminum in the range of about 1 to about 3 moles of SiO 2 per mole of Al 2 O 3 and the equivalent weight of Al 2 O 3 in the anionic aluminum being less than 95% and more than 50% of the total equivalent weight of Al 1 O 3 in the cationic and anionic aluminum source and adjusting the pH of the reactant mixture to a range of about 8 to about 9.
Claim 17
Independent Claim
136 words
A method of producing a silica-alumina gel which comprises combining sodium silicate with a mixture of an anionic aluminum and a cationic aluminum to form a reaction mixture in which the amounts of the reaction times are equivalent to a ratio of the moles of SiO 2 to the moles of Al 2 O 3 in the cationic and anionic aluminum in the range of about 1 to about 3 moles of SiO 2 per mole of Al 2 O 3 and the equivalent weight of Al 2 O 3 in the anionic aluminum being less than 95% and more than 50% of the total equivalent weight of Al 1 O 3 in the cationic and anionic aluminum source and adjusting the pH of the reactant mixture to a range of about 8 to about 9.
Claim 18
Dependent Claim
37 words
The process of claim 13 in which the equivalent weight of the Al 2 O 3 in the anionic aluminum is from about 60% to about 95% of the equivalent weight in the cationic and anionic aluminum.
Claim 19
Dependent Claim
25 words
The process of claim 13, in which the anionic aluminum is sodium aluminate and the cationic aluminum is an aluminum salt of a mineral acid.
Claim 20
Dependent Claim
25 words
The process of claim 14 in which the anionic aluminum is sodium aluminate and the cationic aluminum is an aluminum salt of a mineral acid.
Claim 21
Dependent Claim
29 words
The process of claim 5, in which the gel is heated in an aqueous medium under autogenous pressures at a temperature in the range of 250 to 500° F.
Claim 22
Dependent Claim
37 words
The process of claim 17, in which the equivalent weight of the Al 2 O 3 in the anionic aluminum is from about 60% to about 95% of the equivalent weight in the cationic and anioic aluminum.
Claim 23
Dependent Claim
25 words
The process of claim 17, in which the anionic aluminum is sodium aluminate and the cationic aluminum is an aluminum salt of a mineral salt.
Claim 24
Dependent Claim
25 words
The process of claim 18, in which the anionic aluminum is sodium aluminate and the cationic aluminum is an aluminum salt of a mineral acid.
Claim 25
Dependent Claim
27 words
The process of claim 9 in which the gel is heated in an aqueous medium under autogenous pressure at a temperature of about 250° to 500° F.
Claim 26
Dependent Claim
36 words
The process of claim 21 in which the equivalentweight of the Al 2 O 3 in the anionic aluminum is from about 60% to about 95% of the equivalent weight in the cationic and anionic aluminum.
Claim 27
Dependent Claim
25 words
The process of claim 21 in which the anionic aluminum is sodium aluminate and the cationic aluminum is an aluminum salt of a mineral acid.
Claim 28
Dependent Claim
25 words
The process of claim 22, in which the anionic aluminum is sodium aluminate and the cationic aluminum is an aluminum salt of a mineral acid.
Claim 29
Dependent Claim
23 words
The process of claim 9, in which the gel is heated under autogenous pressure at a temperature of about 250 to 500° F.
Claim 30
Dependent Claim
37 words
The process of claim 25 in which the equivalent weight of the Al 2 O 3 in the anionic aluminum is from about 60% to about 95% of the equivalent weight in the cationic and anionic aluminum.
Claim 31
Dependent Claim
25 words
The process of claim 25, in which the anionic aluminum is sodium aluminate and the cationic aluminum is an aluminum salt of a mineral acid.
Claim 32
Dependent Claim
25 words
The process of claim 27, in which the anionic aluminum is sodium aluminate and the cationic aluminum is an aluminum salt of a mineral acid.
Claim 33
Dependent Claim
23 words
The process of claim 13, in which the gel is heated under autogenous pressure at a temperature of about 250 to 500° F.
Claim 34
Dependent Claim
37 words
The process of claim 29, in which the equivalent weight of the Al 2 O 3 in the anionic aluminum is from about 60% to about 95% of the equivalent weight in the cationic and anionic aluminum.
Claim 35
Dependent Claim
25 words
The process of claim 29, in which the anionic aluminum is sodium aluminate and the cationic aluminum is an aluminum salt of a mineral acid.
Claim 36
Dependent Claim
25 words
The process of claim 30, in which the anionic aluminum is sodium aluminate and the cationic aluminum is an aluminum salt of a mineral acid.
Claim 37
Dependent Claim
16 words
An extruded and calcined pellet of the silica-alumina gel according to claims 1, 2 or 3.
Claim 38
Dependent Claim
29 words
A calcined extruded pellet comprising a silica-alumina gel in which the SiO 2 /Al 2 O 3 molar ratio is in the range of about 1 to about 3.
Claim 39
Dependent Claim
29 words
A calcined extruded pellet comprising a silica-alumina gel in which the SiO 2 /Al 2 O 3 molar ratio is in the range of about 1 to about 3.
Claim 40
Dependent Claim
25 words
The process of claims 5, 9 or 13, in which the silica-alumina gel is extruded to form a pellet and the extruded gel is calcined.
References Cited (Backward Citations)
US3210294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-11 | 1985-07-13 | 1986-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-11 | 1989-07-13 | 1990-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-11 | 1993-07-13 | 1994-01-12 | $7700.00 | Window Closed / Lapsed |