Patent US3455456A successfully refreshed from Google Patents.
Patent US4876287A successfully refreshed from Google Patents.
US4876287A
Expired / Lapsed
US
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Selective ion-complexing media for the removal of metal-ion contaminants from plating baths
Assignee: Bend Research Inc
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Filing: 1986-11-10
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Granted: 1989-10-24
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Expires: 2006-11-10
Abstract
Abstract Ion-complexing gels are disclosed for the selective removal of metal ions from plating solutions, the gels comprising hydrophobic nonporous polymers plasticized and swollen with either hydroxyoxime or phosphoric acid ester complexing agents. Also disclosed are novel ion-complexing media comprising polymeric microporous anisotropic beads impregnated with the same complexing agents. Copper, zinc and iron contaminants are effectively removed from nickel-plating solutions.
Inventors
- 👤 Walter C. Babcock
- 👤 Dwayne T. Friesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:10
CPC Classifications
C; C25; C25D; C25D21/00; C25D21/16; C25D21/18
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
62 words
An ion-complexing gel selective to copper ions in a copper ion- and nickel ion-containing solution comprising a hydrophobic nonporous polymer plasticized and swollen with a hydroxyoxime complexing agent of the formula ##STR7## wherein R 1 is selected from hydrogen, alkyl, aryl and CH═N--OH; and R 2 , R 3 , R 4 and R 5 are selected from hydrogen, alkyl and aryl.
Claim 2
Dependent Claim
62 words
An ion-complexing gel selective to copper ions in a copper ion- and nickel ion-containing solution comprising a hydrophobic nonporous polymer plasticized and swollen with a hydroxyoxime complexing agent of the formula ##STR7## wherein R 1 is selected from hydrogen, alkyl, aryl and CH═N--OH; and R 2 , R 3 , R 4 and R 5 are selected from hydrogen, alkyl and aryl.
Claim 3
Dependent Claim
23 words
The gel of claim 1 wherein said hydroxyoxime complexing agent is selected from 2-hydroxy-5-alkyl benzaldehyde oximes; 2-hydroxy-alkylbenzophenone oximes; 2,6-diformyl-4-alkylphenol dioximes; and 5,8-diethyl-7-hydroxy-dodecane-6-one oxime.
Claim 4
Dependent Claim
56 words
An ion-complexing gel selective to zinc and iron ions in a zinc ion-, iron ion- and nickel ion-containing solution comprising a hydrophobic nonporous polymer plasticized and swollen with a phosphoric acid ester complexing agent of the formula ##STR8## wherein R is selected from hydrogen, alkyl and aryl and at least one R is alkyl or aryl.
Claim 5
Dependent Claim
56 words
An ion-complexing gel selective to zinc and iron ions in a zinc ion-, iron ion- and nickel ion-containing solution comprising a hydrophobic nonporous polymer plasticized and swollen with a phosphoric acid ester complexing agent of the formula ##STR8## wherein R is selected from hydrogen, alkyl and aryl and at least one R is alkyl or aryl.
Claim 6
Dependent Claim
32 words
The gel of claim 3 wherein said phosphoric acid ester is selected from di-2-ethylhexyl phosphoric acid, di-2-ethyloctyl phosphoric acid, di-iso-decyl phosphoric acid, di-n-decyl phosphoric acid, di-alkylphenyl phosphoric acid, and di-(3,7-dimethyloctyl) phosphoric acid.
Claim 7
Dependent Claim
18 words
The gel of claim 1 wherein said polymer has been polymerized in the presence of said complexing agent.
Claim 8
Dependent Claim
24 words
The gel of claim 1 wherein said polymer has been plasticized and swollen with said complexing agent in the presence of an organic solvent.
Claim 9
Dependent Claim
42 words
The gel of claim 1 wherein said polymer is selected from one or more of alkyl-, aryl-, halogen- and amino-substituted polyethylenes, polypropylenes, polyacrylics, polyacrylates, polymethacrylates, polyurethanes, polyamides, polyetherimides, polyvinylbutyrals, polyacrylonitriles, polynorborenes, polyvinyl ethylene-vinylacetate copolymers, ethylene-propylene rubbers, styrene butadiene rubbers, and silicone rubbers.
Claim 10
Dependent Claim
23 words
The gel of claim 1 contained within the pores of or coated onto solid microporous support media selected from beads, fibers and sheets.
Claim 11
Dependent Claim
18 words
The gel of claim 1 coated onto a solid microporous support, said support itself containing said complexing agent.
Claim 12
Dependent Claim
86 words
An ion-complexing medium selective to copper ions in a copper ion- and nickel ion-containing solution comprising polymeric microporous anisotropic beads having surface pores less than 0.1 micron in diameter and interior voids from about 10 microns to about 200 microns in diameter, said beads being impregnated with a nonpolymerizable hydroxyoxime complexing agent of the formula ##STR9## wherein R 1 is selected from hydrogen, alkyl, aryl and CH═N--OH; and R 2 , R 3 , R 4 and R 5 are selected from hydrogen, alkyl and aryl.
Claim 13
Dependent Claim
86 words
An ion-complexing medium selective to copper ions in a copper ion- and nickel ion-containing solution comprising polymeric microporous anisotropic beads having surface pores less than 0.1 micron in diameter and interior voids from about 10 microns to about 200 microns in diameter, said beads being impregnated with a nonpolymerizable hydroxyoxime complexing agent of the formula ##STR9## wherein R 1 is selected from hydrogen, alkyl, aryl and CH═N--OH; and R 2 , R 3 , R 4 and R 5 are selected from hydrogen, alkyl and aryl.
Claim 14
Dependent Claim
23 words
The ion-complexing medium of claim 10 wherein said hydroxyoxime complexing agent is selected from 2-hydroxy-5-alkyl-benzaldehyde oximes; 2-hydroxy-alkylbenzophenone oximes; 2,6-diformyl-4-alkylphenol dioximes; and 5,8-diethyl-7-hydroxy-dodecane-6-one oxime.
Claim 15
Dependent Claim
80 words
An ion-complexing medium selective to zinc and iron ions in a zinc ion-, iron ion- and nickel ion-containing solution comprising polymeric microporous anisotropic beads having surface pores less than 0.1 micron in diameter and interior voids from about 10 microns to about 200 microns in diameter, said beads being impregnated with a nonpolymerizable phosphoric acid ester complexing agent of the formula ##STR10## wherein R is selected from hydrogen, alkyl and aryl and at least one R is alkyl or aryl.
Claim 16
Dependent Claim
80 words
An ion-complexing medium selective to zinc and iron ions in a zinc ion-, iron ion- and nickel ion-containing solution comprising polymeric microporous anisotropic beads having surface pores less than 0.1 micron in diameter and interior voids from about 10 microns to about 200 microns in diameter, said beads being impregnated with a nonpolymerizable phosphoric acid ester complexing agent of the formula ##STR10## wherein R is selected from hydrogen, alkyl and aryl and at least one R is alkyl or aryl.
Claim 17
Dependent Claim
35 words
The ion-complexing medium of claim 12 wherein said phosphoric acid ester complexing medium is selected from di-2-ethylhexyl phosphoric acid, di-2-ethyloctyl phosphoric acid, di-iso-decyl phosphoric acid, di-n-decyl phosphoric acid, di-alkylphenyl phosphoric acid, and di-(3,7-dimethyloctyl) phosphoric acid.
Claim 18
Dependent Claim
18 words
The gel of claim 3 wherein said polymer has been polymerized in the presence of said complexing agent.
Claim 19
Dependent Claim
24 words
The gel of claim 3 wherein said polymer has been plasticized and swollen with said complexing agent in the presence of an organic solvent.
Claim 20
Dependent Claim
42 words
The gel of claim 3 wherein said polymer is selected from one or more of alkyl-, aryl-, halogen- and amino-substituted polyethylenes, polypropylenes, polyacrylics, polyacrylates, polymethacrylates, polyurethanes, polyamides, polyetherimides, polyvinylbutyrals, polyacrylonitriles, polynorborenes, polyvinyl ethylene-vinylacetate copolymers, ethylene-propylene rubbers, styrene butadiene rubbers, and silicone rubbers.
Claim 21
Dependent Claim
23 words
The gel of claim 3 contained within the pores of or coated onto solid microporous support media selected from beads, fibers and sheets.
Claim 22
Dependent Claim
18 words
The gel of claim 3 coated onto a solid microporous support, said support itself containing said complexing agent.
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) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |