US3099529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of nitric acid from its salts
Assignee: Dow Chemical Co
•
Filing: 1960-01-29
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Granted: 1963-07-30
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Expires: 1980-01-29
Abstract
No abstract record available.
Inventors
- 👤 Melvin J Hatch
- 👤 Jr John A Dillon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:04
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/20; C01B21/38; C01B21/46; B; B01; B01J; B01J41/00; B01J41/20; C01B21/48; C07; C07D; C07D319/00; C07D319/10; C07D319/12; C08; C08F; C08F24/00; B01J2220/00; B01J2220/50; B01J2220/54; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
A METHOD FOR SEPARATING FROM ONE ANOTHER NITRIC ACID AND A MEMBER OF THE GROUP CONSISTING OF AMMONIUM NITRATE, WATER-SOLUBLE METAL NITRATE SALTS FREE FROM ANIONIC COMPLEXES WITH NITRIC ACID AND MIXTURES THEREOF BY FEEDING TO A BED OF AN ANION EXCHANGE RESIN IN THE NITRATE FORM IMMERSED IN AN AQUEOUS LIQUID OF THE GROUP OF WATER AND A DILUTE AQUEOUS SOLUTION OF NITRIC ACID HAVING AN ACID CONCENTRATION LESS THAN IN THE FEED SOLUTION, AN AQUEOUS SOLUTION OF SAID ACID AND SAID SALT WHICH SOLUTION IS AT LEAST 0.2 NORMAL IN NITRIC ACID, THUS DISPLACING AQUEOUS LIQUID FROM THE RESIN BED, THEREAFTER FEEDING AN AQUEOUS RINSING SOLUTION OF THE GROUP CONSISTING OF WATER AND DILUTE NITRIC ACID HAVING A NITRIC ACID CONCENTRATION LESS THAN THAT OF THE FEED TO THE BED TO DISPLACE A FURTHER AMOUNT OF RESIDUAL LIQUID FROM THE BED, AND COLLECTING SUCCESSIVE FRACTIONS OF THE DISPLACED EFFLUENT LIQUID WHEREBY THERE IS OBTAINED AN EARLY FRACTION OF THE EFFLUENT LIQUID WHICH CONTAINS A HIGHER RATIO OF SAID SALT TO SAID ACID THAN IS IN THE STARTING SOLUTION AND A LATER FRACTION OF THE EFFLUENT LIQUID WHICH CONTAINS A HIGHER RATIO OF SAID ACID TO SAID SALT THAN IS IN THE STARTING SOLUTION.
Claim 2
Independent Claim
205 words
A METHOD FOR SEPARATING FROM ONE ANOTHER NITRIC ACID AND A MEMBER OF THE GROUP CONSISTING OF AMMONIUM NITRATE, WATER-SOLUBLE METAL NITRATE SALTS FREE FROM ANIONIC COMPLEXES WITH NITRIC ACID AND MIXTURES THEREOF BY FEEDING TO A BED OF AN ANION EXCHANGE RESIN IN THE NITRATE FORM IMMERSED IN AN AQUEOUS LIQUID OF THE GROUP OF WATER AND A DILUTE AQUEOUS SOLUTION OF NITRIC ACID HAVING AN ACID CONCENTRATION LESS THAN IN THE FEED SOLUTION, AN AQUEOUS SOLUTION OF SAID ACID AND SAID SALT WHICH SOLUTION IS AT LEAST 0.2 NORMAL IN NITRIC ACID, THUS DISPLACING AQUEOUS LIQUID FROM THE RESIN BED, THEREAFTER FEEDING AN AQUEOUS RINSING SOLUTION OF THE GROUP CONSISTING OF WATER AND DILUTE NITRIC ACID HAVING A NITRIC ACID CONCENTRATION LESS THAN THAT OF THE FEED TO THE BED TO DISPLACE A FURTHER AMOUNT OF RESIDUAL LIQUID FROM THE BED, AND COLLECTING SUCCESSIVE FRACTIONS OF THE DISPLACED EFFLUENT LIQUID WHEREBY THERE IS OBTAINED AN EARLY FRACTION OF THE EFFLUENT LIQUID WHICH CONTAINS A HIGHER RATIO OF SAID SALT TO SAID ACID THAN IS IN THE STARTING SOLUTION AND A LATER FRACTION OF THE EFFLUENT LIQUID WHICH CONTAINS A HIGHER RATIO OF SAID ACID TO SAID SALT THAN IS IN THE STARTING SOLUTION.
References Cited (Backward Citations)
GB781726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-29 | 1967-01-28 | 1967-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-29 | 1971-01-28 | 1971-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-29 | 1975-01-28 | 1975-07-30 | $7700.00 | Window Closed / Lapsed |