US4601889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the recovery of heavy metal
Assignee: Ube Corp
•
Filing: 1983-10-31
•
Granted: 1986-07-22
•
Expires: 2003-10-31
Abstract
Abstract A process for the recovery of a heavy metal which comprises: bringing a polymer having pendant groups of the formula: --CO--NH--NH--CO--COOM in which M is hydrogen, sodium or potassium, into contact with an aqueous solution containing a heavy metal to have the heavy metal adsorbed by said polymer; and having said heavy metal desorbed from the said polymer.
Inventors
- 👤 Nagayoshi Sakamoto
- 👤 Junichi Kugimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:34
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0252; C22B60/0265; C22B3/00; C22B3/20; C22B3/22; C22B3/24; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
58 words
A process for the recovery of a heavy metal which comprises: bringing a polymer having pendant groups of the formula: --CO--NH--NH--CO--COOM in which m is hydrogen, sodium or potassium, into contact with an aqueous solution containing a heavy metal to have the heavy metal adsorbed by said polymer; and having said heavy metal desorbed from the said polymer.
Claim 2
Dependent Claim
58 words
A process for the recovery of a heavy metal which comprises: bringing a polymer having pendant groups of the formula: --CO--NH--NH--CO--COOM in which m is hydrogen, sodium or potassium, into contact with an aqueous solution containing a heavy metal to have the heavy metal adsorbed by said polymer; and having said heavy metal desorbed from the said polymer.
Claim 3
Dependent Claim
22 words
The process for the recovery of a heavy metal claimed in claim 1, in which said polymer is composed of macroreticular structure.
Claim 4
Dependent Claim
20 words
The process for the recovery of a heavy metal claimed in claim 1, in which said heavy metal is uranium.
Claim 5
Dependent Claim
42 words
The process for the recovery of a heavy metal claimed in claim 1, in which said polymer is a polymer prepared by reaction of a polymer having an acid hydrazide group with an acid chloride, or a hydrolyzed product of said polymer.
Claim 6
Dependent Claim
81 words
The process for the recovery of a heavy metal claimed in claim 4, in which the acid chloride is selected from the group consisting of: (1) an acid chloride having the formula: C1--CO--(CH.sub.2).sub.n --CO--R in which R is chlorine, hydrogen or an alkoxy group containing 1-5 carbon atoms, and n is 0 or 1, provided that R is chlorine or an alkoxy group containing 1-5 carbon atoms in the case of n=0; (2) acetoxyacetic acid chloride; and (3) acetoxysuccinic acid dichloride.
Claim 7
Dependent Claim
60 words
The process for the recovery of a heavy metal claimed in claim 1, in which said polymer is a polymer prepared by homopolymerization of a vinyl monomer having the formula: ##STR3## in which R 1 is hydrogen or methyl, and M has the same meaning as defined above, or copolymerization of said vinyl monomer and one or more other monomers.
Claim 8
Dependent Claim
68 words
The process for the recovery of a heavy metal claimed in claim 1, in which said polymer is a polymer prepared by hydrolysis of a homopolymer of a vinyl monomer having the formula: ##STR4## in which R 1 is hydrogen or methyl, and R 2 is an alkyl group containing 1-18 carbon atoms, or hydrolysis of a copolymer of said vinyl monomer and one or more other monomers.
References Cited (Backward Citations)
JPS5620132A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |