Patent US3699212A successfully refreshed from Google Patents.
US3699212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water systems for phosphate plants
Assignee: GORDON F PALM
•
Filing: 1968-09-19
•
Granted: 1972-10-17
•
Expires: 1988-09-19
Abstract
Abstract Systems for use and handling of water in phosphate plants to reduce air and stream pollution, to reduce losses, and to reduce costs. The pH of water from scrubbers, condensers, filters, and the like, is adjusted by addition of ammonia for reuse in the plant. Multiple pH adjusted water systems may be employed.
Inventors
- 👤 Gordon F Palm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:02
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/66; C01; C01B; C01B25/00; C01B25/16; C01B25/18; C01B25/22; C02F1/52; C02F1/5236; C02F2101/00; C02F2101/10; C02F2101/105; C02F2103/00; C02F2103/18; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/906; Y10S210/915
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
34 words
The process of claim 1 wherein the pH of said waters is increased by said ammonia and calcium sulfate addition from the initial pH to any pH up to a pH of about 9.0.
Claim 2
Dependent Claim
33 words
The process of claim 1 wherein the pH of said waters is increased by said ammonia and calcium sulfate addition from the initial pH to a pH in the range 4.0 to 5.0.
Claim 3
Dependent Claim
60 words
The process of claim 1, wherein waters derived from scrubbers, condensers, and spill and leak washing are delivered from the process to separate pond means and the remainder of said waters are delivered to gypsum disposal pond means, and the waters from each said pond means are re-used in the process as described after ammonia and calcium sulfate treatment thereof.
Claim 4
Dependent Claim
23 words
The process of claim 4, wherein said waters from said separate and gypsum disposal pond means are mixed for re-use in the process.
Claim 5
Dependent Claim
22 words
The process of claim 4, wherein said waters from said separate and gypsum disposal pond means are separately re-used in the process.
Claim 6
Dependent Claim
44 words
The process according to claim 6, wherein the weight ratio, P2O5/F, of said gypsum disposal pond means water is in the range, 2 to 200; and wherein the weight ration, P2O5/F, of said other pond means water is in the range, 0.02 to 1.5.
Claim 7
Dependent Claim
23 words
The process of claim 4, wherein ammonia and calcium sulfate are added to said waters prior to introduction to said separate pond means.
Claim 8
Dependent Claim
31 words
The process of claim 4, wherein said waters are ammoniated prior to introduction to said separate pond means and are further ammoniated after withdrawal from said separate pond means for re-use.
Claim 9
Dependent Claim
16 words
The process of claim 4, wherein only the waters of said separate pond means are ammoniated.
Claim 10
Dependent Claim
51 words
The process of claim 1, wherein said process includes facilities for manufacture of at least one of diammonium phosphate and triple superphosphate having effluent scrubber waters containing acidic fluorine and phosphate materials, said waters being combined with the aforenamed waters and ammonia and calcium sulfate added therewith for re-use as described.
Claim 11
Dependent Claim
60 words
The process of claim 4, wherein said process includes facilities for manufacture of at least one of fertilizer containing ammonium phosphate and triple superphosphate and having effluent scrubber waters containing fluorine and phosphate materials, said waters being combined with the aforenamed waters delivered to said separate pond means and said ammonia and calcium sulfate added therewith for re-use as described.
References Cited (Backward Citations)
US1879204A
Cited
US1944048A
Cited
US2914474A
Cited
GB888085A
Cited
US3161466A
Cited
US3493340A
Cited
US3485580A
Cited
US3498747A
Cited
US3498746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |