US3944501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sorbent for removal of heavy metals
Assignee: Mobil Oil AS
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Filing: 1973-10-16
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Granted: 1976-03-16
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Expires: 1993-10-16
Abstract
Abstract A novel use for sorbents involving the selective removal of heavy metals from liquid streams has been discovered. More specifically it has been discovered that these sorbents selectively remove alkyl lead moieties from gasoline. The sorbents are comprised of metal halides (preferably tin tetrachloride or antimony pentachloride) bonded to a suitable substrate through at least one amine or alkyl halide functional group. The sorbents can be effectively regenerated.
Inventors
- 👤 Darrell D. Whitehurst
- 👤 Stephen A. Butter
- 👤 Paul G. Rodewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:25
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/22; C; C10; C10G; C10G25/00; C10G25/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
84 words
A composition of matter comprising a substantially solid substrate comprising silicon having a minimum surface area of about 10 m 2 /g to 800 m 2 /g having pores with a minimum pore diameter of about 10 A to 500 A, having N, N', N'-trimethyl-γ-propyl ethylene diamine bonded thereto and a Lewis acid metal halide, which metal is of the group consisting of iron, copper, silver, zinc, cadmium, mercury, aluminum, tin, lead, phosphorus, arsenic, antimony, bismuth, sulfur, selenium and telerium bonded to said amine.
Claim 2
Dependent Claim
84 words
A composition of matter comprising a substantially solid substrate comprising silicon having a minimum surface area of about 10 m 2 /g to 800 m 2 /g having pores with a minimum pore diameter of about 10 A to 500 A, having N, N', N'-trimethyl-γ-propyl ethylene diamine bonded thereto and a Lewis acid metal halide, which metal is of the group consisting of iron, copper, silver, zinc, cadmium, mercury, aluminum, tin, lead, phosphorus, arsenic, antimony, bismuth, sulfur, selenium and telerium bonded to said amine.
Claim 3
Dependent Claim
16 words
The composition of matter as claimed in claim 1 wherein said metal halide is tin tetrachloride.
Claim 4
Dependent Claim
16 words
The composition of matter as claimed in claim 1 wherein said metal halide is antimony pentachloride.
Claim 5
Dependent Claim
14 words
The composition of matter as claimed in claim 1 wherein said substrate contains Al.
Claim 6
Dependent Claim
14 words
The composition of matter as claimed in claim 1 wherein said substrate contains Ti.
Claim 7
Dependent Claim
16 words
The composition of matter as claimed in claim 1 wherein said substrate comprises SiO 2 .
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) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |