Patent US4142994A successfully refreshed from Google Patents.
US4142994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaped catalyst support
Assignee: HARSHAW/FILTROL PARTNERSHIP A PARTNERSHIP OF
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Filing: 1977-08-22
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Granted: 1979-03-06
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Expires: 1997-08-22
Abstract
Abstract A mechanically strong, thermally stable porous siliceous particle having a high pore volume and surface area with a major portion of the pore volume in pores of radii more than 20 Angstroms and the process of producing the particles by shaping a clay, acid-leached to a degree insufficient to destroy the plasticity of the clay, forming the leached clay into shaped particles, calcining the particles and further extracting the calcined clay particles without impairing their shape.
Inventors
- 👤 Hamid Alafandi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:11
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/16
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
42 words
A porous shaped siliceous particle having a silica content in excess of about 85% by weight, the major proportion of the volume of the pores of said catalyst support being in pores whose pore radii are in excess of about 30 A.
Claim 2
Dependent Claim
42 words
A porous shaped siliceous particle having a silica content in excess of about 85% by weight, the major proportion of the volume of the pores of said catalyst support being in pores whose pore radii are in excess of about 30 A.
Claim 3
Dependent Claim
78 words
A mechanically and thermally stable porous calcined shaped siliceous particle having a silica content in excess of about 85% by weight, the major proportion of its pore volume being in pores having radii in excess of about 20 A and of the pore volume in the pores of radii above 20 A, the major proportion being in pores above about 30 A radius. A pore volume of above about 0.45 cc/gm and a surface area above about 200.
Claim 4
Dependent Claim
78 words
A mechanically and thermally stable porous calcined shaped siliceous particle having a silica content in excess of about 85% by weight, the major proportion of its pore volume being in pores having radii in excess of about 20 A and of the pore volume in the pores of radii above 20 A, the major proportion being in pores above about 30 A radius. A pore volume of above about 0.45 cc/gm and a surface area above about 200.
Claim 5
Dependent Claim
22 words
The particle of claim 2 which has a cross sectional dimension in the range of greater than about 50 microns in diameter.
Claim 6
Dependent Claim
36 words
The particle of claim 2 which is in the form of a pellet having a major cross sectional dimension in the range of 1/40 to 1/4 inch and a length of about 1/36 to 1/8 inch.
Claim 7
Dependent Claim
19 words
The particle of claim 2 which is in the form of a microsphere of about 50 to 100 microns.
Claim 8
Dependent Claim
60 words
A porous shaped siliceous particle having a silica content of in excess of about 85% by weight on a volatile free basis and having a pore volume of more than about 0.3 cubic centimeters per gram and a surface area of in excess of about 100 square meters per gram of the pellet formed from plastic acid treated subbentonite clay.
Claim 9
Dependent Claim
60 words
A porous shaped siliceous particle having a silica content of in excess of about 85% by weight on a volatile free basis and having a pore volume of more than about 0.3 cubic centimeters per gram and a surface area of in excess of about 100 square meters per gram of the pellet formed from plastic acid treated subbentonite clay.
Claim 10
Dependent Claim
55 words
The particle of claim 6 which is porous shaped siliceous pellet having a silica content in excess of about 80% by weight on a volatile free basis and having a pore volume in excess of about 0.4 cubic centimeters per gram and a surface area of in excess of about 200 square meters per gram.
Claim 11
Dependent Claim
83 words
The particle of claim 6 which is a porous shaped siliceous pellet having a silica content in excess of about 80-85% by weight, the major proportion of the volume of pores of said catalyst support being in pores whose pore radii are in excess of about 20 A, said pellet having a hardness index of more than about 20, a pore volume of more than about 0.2 cc per gram, and a surface area of more than about 300 M 2 per gram.
Claim 12
Dependent Claim
53 words
The particle of claim 8 which is a microsphere having a silica content in excess of about 80% by weight on a volatile free basis and having a pore volume in excess of about 0.4 cubic centimeters per gram and a surface area of in excess of about 200 square meters per gram.
Claim 13
Dependent Claim
9 words
The particle of claim 8 which is a microsphere.
Claim 14
Dependent Claim
98 words
A mechanically and thermally stable porous calcined shaped siliceous pellet having a silica content in excess of about 90% by weight, the major proportion of its pore volume being in pores having radii in excess of about 20 A and of the pore volume in the pores of radii about 20 A, the major proportion being in pores above about 30 A radius, said pellet having a hardness index of more than about 20, a pore volume of more than about 0.4 cc per gram, and a surface area of more than about 200 M 2 per gram.
Claim 15
Dependent Claim
98 words
A mechanically and thermally stable porous calcined shaped siliceous pellet having a silica content in excess of about 90% by weight, the major proportion of its pore volume being in pores having radii in excess of about 20 A and of the pore volume in the pores of radii about 20 A, the major proportion being in pores above about 30 A radius, said pellet having a hardness index of more than about 20, a pore volume of more than about 0.4 cc per gram, and a surface area of more than about 200 M 2 per gram.
Claim 16
Dependent Claim
16 words
The pellet of claim 11 prepared by further acid treating an acid treated plastic sub-bentonite clay.
Claim 17
Dependent Claim
84 words
A porous shaped siliceous microsphere having a silica content of in excess of about 85% by weight on a volatile free basis, said microsphere having an abrasion index of less than about 25, a pore volume of more than about 0.4 cc per gram, a major porportion of said pore volume being in pores in excess of 30 A radii and a surface area of more than about 200 M 2 per gram prepared by further acid treating an acid treated plastic sub-bentonite clay.
Claim 18
Dependent Claim
84 words
A porous shaped siliceous microsphere having a silica content of in excess of about 85% by weight on a volatile free basis, said microsphere having an abrasion index of less than about 25, a pore volume of more than about 0.4 cc per gram, a major porportion of said pore volume being in pores in excess of 30 A radii and a surface area of more than about 200 M 2 per gram prepared by further acid treating an acid treated plastic sub-bentonite clay.
Claim 19
Dependent Claim
102 words
A porous shaped siliceous particle having a silica content in excess of about 90% by weight, the major proportion of the volume of the pores of said catalyst support being in pores whose pore radii are in excess of about 20 A, a pore volume of more than about 0.2 cc per gram, the major portion of said pore volume being in pores of more than 30 A radius a surface area of more than about 200 M 2 per gram and a ratio of the aforesaid pore volume to the aforesaid surface area in excess of 1.2 × 10 3 .
Claim 20
Dependent Claim
102 words
A porous shaped siliceous particle having a silica content in excess of about 90% by weight, the major proportion of the volume of the pores of said catalyst support being in pores whose pore radii are in excess of about 20 A, a pore volume of more than about 0.2 cc per gram, the major portion of said pore volume being in pores of more than 30 A radius a surface area of more than about 200 M 2 per gram and a ratio of the aforesaid pore volume to the aforesaid surface area in excess of 1.2 × 10 3 .
Claim 21
Dependent Claim
17 words
The porous particle of claim 14 prepared by further acid treating an acid treated plastic sub-bentonite clay.
Claim 22
Dependent Claim
21 words
The particle of claim 14 wherein the particle is formed from extruded and further acid treated plastic acid treated sub-bentonite clay.
Claim 23
Dependent Claim
21 words
The particles of claim 14 wherein the particle is formed by further acid treating microspheres of acid treated plastic sub-bentonite clay.
Claim 24
Dependent Claim
22 words
The particle of claim 1 which is prepared by further acid treating a calcined particle formed from acid treated plastic sub-bentonite clay.
Claim 25
Dependent Claim
18 words
The microsphere of claim 13 formed by further acid treating a microsphere produced from acid treated plastic clay.
Claim 26
Dependent Claim
22 words
The particles of claim 2 which is prepared by further acid treating a calcined particle formed from acid treated plastic sub-bentonite clay.
Claim 27
Dependent Claim
22 words
The particle of claim 6 which is prepared by further acid treating a calcined particle formed from acid treated plastic sub-bentonite clay.
References Cited (Backward Citations)
US3901826A
Cited
US3962135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |