Patent US3919077A successfully refreshed from Google Patents.
US3919077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sorbent for removal of heavy metals
Assignee: Individual
•
Filing: 1974-02-21
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Granted: 1975-11-11
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Expires: 1994-02-21
Abstract
Abstract A novel use for sorbents involving the removal of heavy metals from liquid solutions has been discovered. More specifically, it has been discovered that these sorbents remove alkyl lead moieties from gasoline. The sorbents are comprised by a suitable substrate bonded to a metal by means of organic or inorganic exchanger functional groups.
Inventors
- 👤 Darrell Duayne Whitehurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:53
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/02; C10G25/03; C10G25/05
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
101 words
A METHOD FOR EFFECTING THE REMOVAL OF HEAVY METAL CONTAMINANTS FROM SOLUTION IN A SUBSTQNTIALLY HYDROCARBON SOLVENT WHICH COMPRISES CONTACTING SAID SOLUTION, IN A FLOWING SYSTEM, WITH A SOLED SORBENT HAVING A SURFACE AREA OF AT LEAST ABOUT 10 N2/G, HAVING PORES OF AT LEAST ABOUT 10 ANGSTROMS DIAMETER AND COMPRISING A MATERIAL SELECTED FROM THE GROUP CONSISTING ESSENTIALLY OF CARBOXYLIC OR SULFONIC ACID SUBSTITUTED ORGANIC CATION EXCJANG RESIN OR A ZEOLITE-X ZEOLITE WHICH HAS BONDED THERETO THROUGH ITS ACID SITED A METAL OF GROUPS IB, IIB OR IVA OF THE PERIODIC TABLE HAVING AN ATOMEC WEIGHT OF AT LEAST 29.
Claim 2
Independent Claim
101 words
A METHOD FOR EFFECTING THE REMOVAL OF HEAVY METAL CONTAMINANTS FROM SOLUTION IN A SUBSTQNTIALLY HYDROCARBON SOLVENT WHICH COMPRISES CONTACTING SAID SOLUTION, IN A FLOWING SYSTEM, WITH A SOLED SORBENT HAVING A SURFACE AREA OF AT LEAST ABOUT 10 N2/G, HAVING PORES OF AT LEAST ABOUT 10 ANGSTROMS DIAMETER AND COMPRISING A MATERIAL SELECTED FROM THE GROUP CONSISTING ESSENTIALLY OF CARBOXYLIC OR SULFONIC ACID SUBSTITUTED ORGANIC CATION EXCJANG RESIN OR A ZEOLITE-X ZEOLITE WHICH HAS BONDED THERETO THROUGH ITS ACID SITED A METAL OF GROUPS IB, IIB OR IVA OF THE PERIODIC TABLE HAVING AN ATOMEC WEIGHT OF AT LEAST 29.
Claim 3
Dependent Claim
22 words
The method as claimed in claim 1 wherein said metal is selected from the group consisting of Cu, Ag, Hg and Sn.
Claim 4
Dependent Claim
44 words
The method as claimed in claim 1 wherein said heavy metal contaminants are lead alkyl moieties and said substantially hydrocarbon solution is gasOline, and said contacting is carried out at about -50*C. to 100*C. and at space velocities of up to about 40 LHSV.
Claim 5
Dependent Claim
29 words
A method as claimed in claim 3 wherein said sorbent is located in a conduit means in a gasoline distributi system between a storage means and a dispensing means.
Claim 6
Dependent Claim
33 words
A method as claim in claim 4 including pumping said gasoline from said storage means through said conduit means to said dispensing means and sorbing said lead from said gasoline during said pumping.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |