US4421654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal extraction from solution and novel compounds used therefor
Assignee: Dow Silicones Corp
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Filing: 1982-07-15
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Granted: 1983-12-20
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Expires: 2002-07-15
Abstract
Abstract What is disclosed is the preparation of novel silanes, their reaction products on various substrates and the use of the treated substrates to extract metal ions from solution. An example of such a novel compound is ##STR1##
Inventors
- 👤 Edwin P. Plueddemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:52
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/20; C07D215/24; C07D215/26; C22; C22B; C22B3/00; C22B3/20; C22B3/42; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
75 words
A method for preparing an immobilized chelating agent which comprises treating inorganic solid substrates with a silylating agent which is a compound of the formula ##STR26## wherein X is an alkoxy radical containing 1-4 carbon atoms; Q is a -CH 2 ) 3 or ##STR27## radical; y has a value of 0 or 1; R is hydrogen or an R' 3 Si- radical wherein R' is CH 3 -- or CH 3 CH 2 --.
Claim 2
Independent Claim
75 words
A method for preparing an immobilized chelating agent which comprises treating inorganic solid substrates with a silylating agent which is a compound of the formula ##STR26## wherein X is an alkoxy radical containing 1-4 carbon atoms; Q is a -CH 2 ) 3 or ##STR27## radical; y has a value of 0 or 1; R is hydrogen or an R' 3 Si- radical wherein R' is CH 3 -- or CH 3 CH 2 --.
Claim 3
Dependent Claim
9 words
The product produced by the method of claim 1.
Claim 4
Dependent Claim
26 words
A method of removing heavy metal ions from solution which method comprises contacting a solution containing heavy metal ions with a silylated substrate of claim 2.
Claim 5
Dependent Claim
23 words
A method as claimed in claim 3 wherein the solution is aqueous, the substrate is siliceous mineral and the treating compound is ##STR28##
Claim 6
Dependent Claim
21 words
A method as claimed in claim 4 wherein R is hydrogen, Q is -CH 2 ) 3 and X is methoxy.
Claim 7
Dependent Claim
16 words
A method as claimed in claim 3 wherein the heavy metal ions are transition metal ions.
Claim 8
Dependent Claim
17 words
A method as claimed in claim 6 wherein the transition metal ions are rare earth metal ions.
Claim 9
Dependent Claim
15 words
A method as claimed in claim 7 wherein the rare earth metal ions are lanthanides.
Claim 10
Dependent Claim
15 words
A method as claimed in claim 7 wherein the rare earth metal ions are actinides.
Claim 11
Dependent Claim
14 words
A method as claimed in claim 6 wherein the transition metal ion is copper.
Claim 12
Dependent Claim
14 words
A method as claimed in claim 6 wherein the transition metal ion is iron.
Claim 13
Dependent Claim
14 words
A method as claimed in claim 6 wherein the transition metal ion is cobalt.
Claim 14
Dependent Claim
14 words
A method as claimed in claim 6 wherein the transition metal ion is nickel.
Claim 15
Dependent Claim
14 words
A method as claimed in claim 6 wherein the transition metal ion is molybdenum.
Claim 16
Dependent Claim
14 words
A method as claimed in claim 6 wherein the transition metal ion is rhodium.
Claim 17
Dependent Claim
14 words
A method as claimed in claim 6 wherein the transition metal ion is silver.
Claim 18
Dependent Claim
14 words
A method as claimed in claim 6 wherein the transition metal ion is platinum.
Claim 19
Dependent Claim
14 words
A method as claimed in claim 6 wherein the transition metal ion is gold.
Claim 20
Dependent Claim
16 words
A method as claimed in claim 9 wherein the rare earth metal actimide ion is uranium.
Claim 21
Dependent Claim
14 words
A method as claimed in claim 6 wherein the transition method ion is manganese.
Claim 22
Dependent Claim
14 words
A method as claimed in claim 6 wherein the transition metal ion is titanium.
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) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |