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US3862298A
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Process for the treatment of a salt-containing acid solution
Assignee: Chemische Fabrik Budenhiem KG
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Filing: 1972-08-22
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Granted: 1975-01-21
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Expires: 1992-08-22
Abstract
Abstract A process for treating a salt-containing acid solution is described wherein the cations contained therein are effectively removed by contacting such solution with an organic solvent to precipitate a cation-containing solids fraction. The organic solvent is miscible with water and acid in all proportions. The solids fraction is separated, for example by filtration techniques, and after further treatment may be used in other processing operations. The liquid phase is treated to remove the organic solvent thereby leaving an acid solution which may be used, inter alia, for the regeneration of a cation exchange resin.
Inventors
- 👤 Klaus Beltz
- 👤 Klaus Frankenfeld
- 👤 Karl Gotzmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:40
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/26; B; B01; B01J; B01J49/00; C01; C01B; C01B17/00; C01B17/69; C01B17/90; C01B25/00; C01B25/16; C01B25/18; C01B25/234; Y; Y10; Y10S; Y10S423/00; Y10S423/01; Y10S423/02; Y10S423/09; Y10S423/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
17 words
The process as defined in claim 1 wherein separation of said solid fraction is effected by filtration.
Claim 2
Dependent Claim
19 words
The process as defined in claim 1 wherein said organic solvent is separated from said liquid phase by distillation.
Claim 3
Dependent Claim
20 words
The process as defined in claim 1 wherein said acid solution has a concentration of from 10 to 85 percent.
Claim 4
Dependent Claim
15 words
The process as defined in claim 1 wherein said organic solvent is an aliphatic alcohol.
Claim 5
Dependent Claim
16 words
The process as defined in claim 1 wherein said organic solvent is an azeotropic organic solution.
Claim 6
Dependent Claim
24 words
The process as defined in claim 1 wherein the organic solvent is passed through a acid regenerated cation exchange resin prior to step (a).
Claim 7
Dependent Claim
15 words
The process as defined in claim 1 wherein step (a) is effected with vigorous agitation.
Claim 8
Dependent Claim
25 words
The process as defined in claim 1 wherein said liquid phase of step (b) is passed through a cation exchange resin prior to step (c).
Claim 9
Dependent Claim
19 words
The process as defined in claim 1 wherein the organic solvent of step (c) is recycled to step (a).
References Cited (Backward Citations)
US3463609A
Cited
US3684438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |