US3630752A
Expired / Lapsed
US
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Nitrate addition to inhibit corrosive action of ammoniated superphosphoric acid
Assignee: FERTILIZER INDUSTRIES Inc
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Filing: 1969-09-25
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Granted: 1971-12-28
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Expires: 1989-09-25
Abstract
Abstract Ferrous and aluminum metal corrosion by an aqueous solution of ammoniated superphosphoric acid is inhibited by incorporating about 0.5-5 percent by weight of nitrate ion based on the total phosphorous content measured as P2O5. The aqueous solution, which is useful as a ruminant feed supplement, has a pH of 5-8, a nitrogen content of 9-12 percent by weight, and a total phosphorous content measured as P2O5 of 28-39 percent by weight.
Inventors
- 👤 Herbert F Scott Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:07
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/18; C23F11/181; A; A23; A23K; A23K20/00; A23K20/20; A23K20/26; Y; Y10; Y10S; Y10S426/00; Y10S426/807
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
36 words
The process as claimed in claim 1 wherein the ammoniated superphosphoric acid solution is derived from wet-process phosphoric acid and contains at least about 1 to 5 percent trace minerals derived from the wet-process phosphoric acid.
Claim 2
Dependent Claim
69 words
The process as claimed in claim 2 wherein the solution of ammoniated superphosphoric acid in water has a pH of about 6, a nitrogen content of from about 10 to 11 percent by weight, a total phosphorus content measured as P2O5 of from about 34 to 38 percent by weight, and wherein the polymeric phosphates represent about 55 to 65 percent by weight based on the total phosphorus content.
Claim 3
Dependent Claim
25 words
The process as claimed in claim 2 wherein the nitrate compound is selected from the group consisting of ammonium nitrate, sodium nitrate and potassium nitrate.
Claim 4
Dependent Claim
35 words
The proceSs as claimed in claim 2 wherein the nitrate compound is ammonium nitrate, and about 1 to 4 percent by weight nitrate ion is incorporated based on the total phosphorus content measured as P2O5.
Claim 5
Dependent Claim
38 words
The process as claimed in claim 2 wherein the nitrate compound is ammonium nitrate and at least about 75 percent by weight urea is incorporated in the ammoniated superphosphoric acid solution based on the weight of ammonium nitrate.
Claim 6
Dependent Claim
115 words
As a new composition of matter of low corrosiveness toward ferrous and aluminum metals a solution of ammoniated superphosphoric acid in water having a pH from about 5 to 8 and containing from about 9 to 12 percent by weight nitrogen, from about 28 to 39 percent by weight total phosphorus content measured as P2O5, and wherein polymeric phosphates represent from about 30 to 70 percent by weight based on the total phosphorus content, about 0.5 to 5 percent by weight, based on the total phosphorus content measured as P2O5, of nitrate ion in the form of a nitrate compound soluble in the said ammoniated superphosphoric acid solution, and the balance substantially consisting of water.
Claim 7
Dependent Claim
36 words
The composition as claimed in claim 7 wherein the ammoniated superphosphoric acid solution is derived from wet-process phosphoric acid and contains at least about 1 to 5 percent trace minerals derived from the wet-process phosphoric acid.
Claim 8
Dependent Claim
69 words
The composition as claimed in claim 8 wherein the solution of ammoniated superphosphoric acid in water has a pH of about 6, a nitrogen content of from about 10 to 11 percent by weight, a total phosphorus content measured as P2O5 of from about 34 to 38 percent by weight, and wherein the polymeric phosphates represent about 55 to 65 percent by weight based on the total phosphorus content.
Claim 9
Dependent Claim
25 words
The composition as claimed in claim 8 wherein the nitrate compound is selected from the group consisting of ammonium nitrate, sodium nitrate and potassium nitrate.
Claim 10
Dependent Claim
35 words
The composition as claimed in claim 8 wherein the nitrate compound is ammonium nitrate, and about 1 to 4 percent by weight nitrate ion is incorporated based on the total phosphorus content measured as P2O5.
Claim 11
Dependent Claim
38 words
The composition as claimed in claim 8 wherein the nitrate compound is ammonium nitrate and at least about 75 percent by weight urea is incorporated in the ammoniated superphosphoric acid solution based on the weight of ammonium nitrate.
Claim 12
Dependent Claim
117 words
A process for controlling corrosiveness to ferrous and aluminum metals of a solution of ammoniated superphosphoric acid in water, said solution having a pH from about 5 to 8, a nitrogen content of from about 9 to 12 percent by weight, a total phosphorus content measured as P2O5 of from about 28 to 39 percent by weight, and wherein polymeric phosphates represent from about 30 to 70 percent by weight based on the total phosphorus content, which process comprises incorporating in said solution about 1.0 to 2.3 percent by weight, based on the total phosphorus content measured as P2O5, of nitrate ion in the form of a nitrate compound soluble in the said ammoniated superphosphoric acid solution.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |