Patent US3856664A successfully refreshed from Google Patents.
US3856664A
Expired / Lapsed
US
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Sorbent for heavy metals
Assignee: Mobil Oil AS
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Filing: 1974-02-21
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Granted: 1974-12-24
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Expires: 1994-02-21
Abstract
Abstract A suitable substrate 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
- 👤 D Whitehurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:09
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/003; C10G25/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
95 words
A METHOD FOR EFFECTING REMOVAL OF HEAVY METAL CONTAMINANT FROM A SUBSTANTIALLY HYDROCARBON SOLUTION CONTAINING THE SAME WHICH COMPRISES CONTACTING SAID SOLUTION WITH A SORBENT COMPRISING A PROUS SOLID SELECTED FROM THE GROUP CONSISTING OF CROSS-LINKED POLYSTYRENE, AND INORGANIC OXIDES. FOR SAID METAL CONTAMINANT IN A FLOWING SYSTEM AND SORBENT COMPRISING A SUBSTRATE HAVING A MINIMUM SURFACE AREA OF ABOUT 10 M2/G AND PORES WITH A MINIMUM PORE DIAMETER OF ABOUT 10A MODIFIED BY SULFUR HAVING WEAK LEWIS BASE CHARACTER, THE AVAILABLE ELECTRONS WHICH PRODUCE THE LEWIS BASE CHARACTER BEING AVAILABLE FROM THE SULFUR ATOM.
Claim 2
Independent Claim
95 words
A METHOD FOR EFFECTING REMOVAL OF HEAVY METAL CONTAMINANT FROM A SUBSTANTIALLY HYDROCARBON SOLUTION CONTAINING THE SAME WHICH COMPRISES CONTACTING SAID SOLUTION WITH A SORBENT COMPRISING A PROUS SOLID SELECTED FROM THE GROUP CONSISTING OF CROSS-LINKED POLYSTYRENE, AND INORGANIC OXIDES. FOR SAID METAL CONTAMINANT IN A FLOWING SYSTEM AND SORBENT COMPRISING A SUBSTRATE HAVING A MINIMUM SURFACE AREA OF ABOUT 10 M2/G AND PORES WITH A MINIMUM PORE DIAMETER OF ABOUT 10A MODIFIED BY SULFUR HAVING WEAK LEWIS BASE CHARACTER, THE AVAILABLE ELECTRONS WHICH PRODUCE THE LEWIS BASE CHARACTER BEING AVAILABLE FROM THE SULFUR ATOM.
Claim 3
Dependent Claim
57 words
The method claimed in claim 1 wherein said sorbent is further modified by the addition of at least one metal halide, said metal halide having a Group IB, IIB, IIIA, IVA, VA, VIA or VIII metal, having an atomic number greater than 12, said sulfur acting as a bridging member between said substrate and said metal halide.
Claim 4
Dependent Claim
13 words
The method claimed in claim 2 wherein said metal halide is tin chloride.
Claim 5
Dependent Claim
124 words
A process for distributing and dispensing motor fuel comprising transportation means and storage means used alternatively for leaded and unleaded fuels and at least one substantially lead-free fuel dispensing station comprising storage means, pumping means; conduit means connecting said storage means and said pump; anD conduit discharge means from said pump; the improvement which comprises contacting said fuel in a flowing system with a sorbent comprising a porous solid selected from the group consisting of cross-linked polystyrene and inorganic oxides comprising a substrate having a minimum surface area of about 10m2/g and pores with a minimum pore diameter of about 10A modified by sulfur having weak Lewis base character, the available electrons which produce the Lewis base character being available from the sulfur atom.
Claim 6
Dependent Claim
124 words
A process for distributing and dispensing motor fuel comprising transportation means and storage means used alternatively for leaded and unleaded fuels and at least one substantially lead-free fuel dispensing station comprising storage means, pumping means; conduit means connecting said storage means and said pump; anD conduit discharge means from said pump; the improvement which comprises contacting said fuel in a flowing system with a sorbent comprising a porous solid selected from the group consisting of cross-linked polystyrene and inorganic oxides comprising a substrate having a minimum surface area of about 10m2/g and pores with a minimum pore diameter of about 10A modified by sulfur having weak Lewis base character, the available electrons which produce the Lewis base character being available from the sulfur atom.
Claim 7
Dependent Claim
56 words
The process of claim 4 wherein said sorbent is further modified by the addition of at least one metal halide, said metal halide having a Group IB, IIB, IIIA, IVA, VA, VIA or VIII metal, having an atomic number greater than 12 said sulfur acting as a bridging member between said substrate and said metal halide.
Claim 8
Dependent Claim
12 words
The process of claim 5 wherein said metal halide is tin chloride.
Claim 9
Independent Claim
147 words
A method for distributing and dispensing substantially lead-free motor fuels through transport and storage facilities used alternatively for leaded and unleaded fuel which comprises contacting the fuel intended to be substantially lead free but which has acquired a minor amount of alkyl lead anit-knock compounds through contact with equipment also used for leaded fuels with a sorbent in a flowing system, said sorbent comprising a porous solid selected from the group consisting of cross-linked polystyrene and inorganic oxides comprising a substrate having a minimum surface area of about 10m2/g and pores and a minimum pore diameter of about 10A modified by sulfur having weak Lewis base character, the available electrons which produce the Lewis base character being available from the sulfur, said contacting occurring at temperatures of about -50*C. to 100*C. and at space velocities of up to about 40 LHSV; and removing said substantially lead-free fuel.
Claim 10
Independent Claim
147 words
A method for distributing and dispensing substantially lead-free motor fuels through transport and storage facilities used alternatively for leaded and unleaded fuel which comprises contacting the fuel intended to be substantially lead free but which has acquired a minor amount of alkyl lead anit-knock compounds through contact with equipment also used for leaded fuels with a sorbent in a flowing system, said sorbent comprising a porous solid selected from the group consisting of cross-linked polystyrene and inorganic oxides comprising a substrate having a minimum surface area of about 10m2/g and pores and a minimum pore diameter of about 10A modified by sulfur having weak Lewis base character, the available electrons which produce the Lewis base character being available from the sulfur, said contacting occurring at temperatures of about -50*C. to 100*C. and at space velocities of up to about 40 LHSV; and removing said substantially lead-free fuel.
Claim 11
Dependent Claim
58 words
The method claimed in claim 7 wherein said sorbent is further modified by the addition of at least one metal halide, said metal halide having a Group IB, IIB, IIA, IIIA, IVA, VA, VIA or VIII metal, having an atomic number greater than 12, said sulfur acting as a bridging member between said substrate and said metal halide.
Claim 12
Dependent Claim
13 words
The method claimed in claim 8 wherein said metal halide is tin chloride.
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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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |