US4133929A
Expired / Lapsed
US
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Ionically modified cellulose materials for removal of heavy metal ions
Assignee: BASF Corp
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Filing: 1977-06-14
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Granted: 1979-01-09
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Expires: 1997-06-14
Abstract
Abstract A cellulosic absorption material for the removal of heavy metal ions from fluids, which material contains at least one chelate-forming amino acid group which is bonded through the group of the formula ##STR1## to the cellulose portion wherein the carbonyl group is linked to the chelate-forming radical and the oxygen is linked to the cellulose portion.
Inventors
- 👤 Quentin Bowes
- 👤 Jaroslav Haase
- 👤 Rudolf F. Wurster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:38
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/286; B; B01; B01J; B01J45/00; C08; C08B; C08B11/00; C08B11/02; C08B11/04; C08B11/14; C22; C22B; C22B3/00; C22B3/20; C22B3/42; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T442/00; Y10T442/20; Y10T442/2508
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
53 words
A cellulosic adsorption material for the removal of heavy metal ions which contains at least one chelate-forming amino acid group which is bonded through the group of the formula ##STR10## to the cellulose portion, wherein the carbonyl group is linked to the chelate-forming radical and the oxygen is linked to the cellulose portion.
Claim 2
Dependent Claim
53 words
A cellulosic adsorption material for the removal of heavy metal ions which contains at least one chelate-forming amino acid group which is bonded through the group of the formula ##STR10## to the cellulose portion, wherein the carbonyl group is linked to the chelate-forming radical and the oxygen is linked to the cellulose portion.
Claim 3
Dependent Claim
43 words
An adsorption material according to claim 1 wherein the modified cellulose material contains as chelate-forming group a glycine, sarcosine, iminodiacetic acid, methylaminopropionic acid, iminodipropionic acid, iminoacetic acid-propionic acid, ethanolaminoacetic acid, vinylbenzyliminodiacetic acid or ethylenediamine-N,N'-dipropionic acid group, or the alkali metal salt form thereof.
Claim 4
Dependent Claim
23 words
An adsorption material according to claim 2 wherein the modified cellulose material contains an iminodiacetic acid or iminodipropionic acid group as chelate-forming group.
Claim 5
Dependent Claim
127 words
An adsorption material according to claim 1 wherein the chelate-forming component of the modified cellulose material is derived from a free or etherified methylol compound of the formula ##STR11## wherein Y represents hydrogen, lower alkyl or --CH 2 --O--R 2 , X represents the direct bond, --O--, --S-- or ##STR12## each of R 1 , R 2 and R 3 independently represents hydrogen or lower alkyl, Q represents a C 1 -C 8 -alkylene or phenylene-C 1 -C 4 -alkylene radical which is unsubstituted or substituted by lower alkyl or phenyl, Z represents lower alkyl, --B--COOH or the group of the formula ##STR13## each of A and B independently represents C 1 -C 8 -alkylene which is unsubstituted or substituted by lower alkyl, lower alkoxy or phenyl.
Claim 6
Dependent Claim
37 words
An adsorption material according to claim 4 wherein the chelate-forming component of the modified cellulose material is derived from a free or etherified methylol compound of the general formula (3), wherein Z represents lower alkyl or --B--COOH.
Claim 7
Dependent Claim
85 words
An adsorption material according to claim 5 wherein the chelate-forming component of the modified cellulose material is derived from a free or etherified methylol compound of the formula ##STR14## wherein Y 1 represents hydrogen or --CH 2 --O--R 5 , each of R 4 and R 5 represents hydrogen or methyl, X 1 represents the direct bond or --NH--, Q 1 represents C 1 -C 5 -alkylene or phenylene-C 1 -C 3 -alkylene, and each of A 1 and B 1 represents methylene or ethylene.
Claim 8
Dependent Claim
42 words
An adsorption material according to claim 6 wherein the chelate-forming component of the modified cellulose material is derived from a methylol compound of the formula ##STR15## wherein Q 1 , A 1 and B 1 have the meanings given in claim 6.
Claim 9
Dependent Claim
42 words
An adsorption material according to claim 7 wherein the chelate-forming component of the modified cellulose material is derived from a methylol compound of the formula (6), wherein each of Q 1 , A 1 and B 1 independently represents methylene or ethylene.
Claim 10
Dependent Claim
115 words
An adsorption material according to claim 1 wherein the chelate-forming component of the modified cellulose material is derived from a polymer compound which contains recurring units of the formulae ##STR16## wherein each of Q 2 and Q 3 independently represents straight chain or branched C 2 -C 8 -alkylene, A represents C 1 -C 8 -alkylene which is unsubstituted or substituted by lower alkyl, lower alkoxy or phenyl, Q represents a C 1 -C 8 -alkylene or phenylene-C 1 -C 4 -alkylene radical which is unsubstituted or substituted by lower alkyl or phenyl, Y represents hydrogen, lower alkyl or --CH 2 --O--R 2 , R 1 and R 2 independently represents hydrogen or lower alkyl.
Claim 11
Dependent Claim
41 words
An adsorption material according to claim 9 wherein the chelate-forming component of the modified cellulose material is derived from a polyalkylenimine which contains recurring units of the formulae (7a) and (7b) and has an average molecular weight of 500 to 200,000.
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) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |