US4124504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating caustic wash solutions
Assignee: Individual
•
Filing: 1977-05-25
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Granted: 1978-11-07
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Expires: 1997-05-25
Abstract
Abstract A process is disclosed for treating caustic wash solutions with permanganate ions such that a significant degree of chemical purification of the wash solutions is effected which correspondingly permits reuse of the wash solutions in cleaning metal articles.
Inventors
- 👤 George Munden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:11
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C23; C23G; C23G1/00; C23G1/36; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/911; Y10S210/912
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
63 words
A method for chemical purification of contaminated caustic wash solution which comprises, (a) removing any layered contaminants from the wash solution; (b) adding potassium permanganate to the contaminated wash solution in an amount ranging from about 0.2 parts to about 5 parts permanganate per 100 parts wash solution; (c) allowing precipitated contaminants to settle; and (d) separating precipitated contaminants from the wash solution.
Claim 2
Independent Claim
63 words
A method for chemical purification of contaminated caustic wash solution which comprises, (a) removing any layered contaminants from the wash solution; (b) adding potassium permanganate to the contaminated wash solution in an amount ranging from about 0.2 parts to about 5 parts permanganate per 100 parts wash solution; (c) allowing precipitated contaminants to settle; and (d) separating precipitated contaminants from the wash solution.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein the amount ranges from about 0.5 parts to about 2 parts permanganate per 100 parts wash solution.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein about 30 to about 70% of the contaminants are separated from the wash solution.
Claim 5
Dependent Claim
27 words
The method of claim 1 wherein the optimum amount of potassium permanganate is determined by sample prior to addition of the permanganate to the contaminated wash solution.
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) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |