Patent US4136021A successfully refreshed from Google Patents.
US4136021A
Expired / Lapsed
US
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Sorbent for heavy metals
Assignee: Mobil Oil AS
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Filing: 1976-08-25
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Granted: 1979-01-23
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Expires: 1996-08-25
Abstract
Abstract A cross-linked polystyrene resin modified by the presence therein of chemically bound sulfur provides a highly selective sorbent for removal of heavy metal contaminants from liquids containing the same.
Inventors
- 👤 Darrell D. Whitehurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:42
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/02; B; B01; B01J; B01J20/00; B01J20/22; B01J20/26; B01J20/265; B01J20/267; B01J31/00; B01J31/02; B01J31/06; B01J31/08; B01J31/16; B01J31/165; B01J31/20; B01J2231/00; B01J2231/30; B01J2231/32; B01J2231/321; B01J2231/50; B01J2231/52
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
51 words
A method for effecting removal of a heavy metal contaminant from a hydrocarbon solution containing same which comprises contacting said solution, with a sorbent for said metal contaminant comprising a cross-linked polystyrene resin modified by the presence therein of chemically bound sulfur having an oxidation state of less than + 6.
Claim 2
Independent Claim
51 words
A method for effecting removal of a heavy metal contaminant from a hydrocarbon solution containing same which comprises contacting said solution, with a sorbent for said metal contaminant comprising a cross-linked polystyrene resin modified by the presence therein of chemically bound sulfur having an oxidation state of less than + 6.
Claim 3
Dependent Claim
47 words
The method as claimed in claim 1 wherein said sorbent is a cross-linked polystyrene resin modified by the presence therein of between about 2 and about 30 weight percent of chemically combined sulfur in combination with between about 5 and about 50 weight percent of stannic chloride.
References Cited (Backward Citations)
US3105038A
Cited
US3696012A
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US3969244A
Cited
US3728257A
Cited
US3769205A
Cited
US3785968A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |