US4022964A
Expired / Lapsed
US
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Ion exchanger on the basis of cellulose and process for its manufacture
Assignee: Honeywell Riedel de Haen AG
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Filing: 1975-07-30
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Granted: 1977-05-10
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Expires: 1995-07-30
Abstract
Abstract Ion exchanges on cellulose basis containing groups of the formula ##STR1## in which R represents a functional group and n is zero or 1 are prepared, when n is zero, by reacting cellulose or a cellulose-like compound with a β-hydroxyethylsulfonyl derivative and, when n is 1, by preparing a cellulose derivative from cellulose and an amino derivative of β-hydroxyethylsulfone, diazotizing the cellulose derivative and introducing R-H functional groups by coupling of ligands capable of being coupled.
Inventors
- 👤 Karl Heinrich Lieser
- 👤 Peter Burba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:02
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/22; C; C08; C08B; C08B11/00; C08B11/02; C08B11/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
25 words
An ion exchange cellulose derivative having groups of the formula ##STR9## in which R is an ion exchange group and n is zero or 1.
Claim 2
Dependent Claim
25 words
An ion exchange cellulose derivative having groups of the formula ##STR9## in which R is an ion exchange group and n is zero or 1.
Claim 3
Dependent Claim
20 words
An ion exchange cellulose derivative as claimed in claim 1, wherein R is the radical of an organic metal reagent.
Claim 4
Dependent Claim
56 words
A process for the manufacture of an ion exchanger as claimed in claim 1, in which n is zero, which comprises reacting cellulose or a cellulose derivative with a β-hydroxyethylsulfonyl derivative having an R--SO 2 --CH 2 --CH 2 --O-- group and being couplable with cellulose or a cellulose derivative, R being an ion exchange group.
Claim 5
Dependent Claim
50 words
The process as claimed in claim 3, wherein the β-hydroxyethylsulfonyl derivative is a compound of the formula R--SO 2 --CH 2 CH 2 --OSO 3 Na in which R is an ion exchange group being linked by the --SO 2 --CH 2 --CH 2 --O-- bridging group to the cellulose.
Claim 6
Dependent Claim
70 words
A process for the manufacture of an ion exchanger as claimed in claim 1 in which n is 1, which comprises: (a) preparing an amino derivative of β-hydroxyethylsulfone, (b) preparing a diazotizable cellulose derivative from the amino derivative of step (a) and cellulose, (c) diazotizing the cellulose derivative of step (b), and (d) coupling the diazotized cellulose derivative of step (c) with a compound having an ion exchange group R.
Claim 7
Dependent Claim
54 words
The process of claim 5, wherein the amino derivative of step (a) has the formula para--H 2 H--C 6 H 4 --SO 2 --CH 2 CH 2 --OSO 3 Na and the cellulose derivative of step (b) has the formula para--H 2 N--C 6 H 4 --SO 2 --CH 2 CH 2 --O-- cell.
References Cited (Backward Citations)
US3720500A
Cited
US3414367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |