US3617563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and a product for the purification of polluted water from heavy metal ions present therein
Assignee: Res AB
•
Filing: 1969-08-12
•
Granted: 1971-11-02
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Expires: 1989-08-12
Abstract
Abstract A product for the pruification of polluted water from heavy metal ions such as lead and mercury, present therein. The process is characterized by treating the water with an ion exchange composition on the basis of epoxidized black liquor obtained from the sulfate pulp process. The product as used for this pruif
Inventors
- 👤 Kaj O H Fuxelius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:32
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
23 words
A process according to claim 1, characterized in that the heavy metal ions are selected from the group consisting of mercury and lead.
Claim 2
Dependent Claim
84 words
A process for the removal of heavy metal ions from polluted water, comprising treating the water with an ion exchanger mass consisting essentially of a reaction product of (I) a major amount of components (a) and (b), said component (a) being an aqueous sulfate black liquor of 5-90 percent solids content and said component (b) being 5-20 percent by weight, based on black liquor solids, of a compound selected from the group consisting of epichlorohydrin and 1,2-dichlorohydrin and (II) a minor amount of 1,3-dithiopropane.
Claim 3
Dependent Claim
23 words
A process according to claim 3, characterized in that the heavy metal ions are selected from the group consisting of mercury and lead.
Claim 4
Dependent Claim
55 words
An ion exchanger mass for the removal of heavy metal ions from polluted water, consisting essentially of a reaction product of (a) an aqueous sulfate black liquor of 5-90 percent solids content and (b) 5-20 percent by weight, based on black liquor solids, of a compound selected from the group consisting of epichlorohydrin and 1,2-dichlorohydrin.
Claim 5
Dependent Claim
77 words
An ion exchanger mass for the removal of heavy metal ions from polluted water, consisting essentially of a reaction product of (I) a major amount of components (a) and (b), said component (a) being an aqueous sulfate black liquor of 5-90 percent solids content, and said component (b) being 5-20 percent by weight, based on black liquor solids, of a compound selected from the group consisting of epichlorohydrin and 1,2-dichlorohydrin, and (II), a minor amount of 1,3-dithiopropane.
References Cited (Backward Citations)
US3275576A
Cited
US3226380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |