US3340160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and method for inhibiting the formation of polymers during fractional distillation
Assignee: Phillips Petroleum Co
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Filing: 1964-06-23
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Granted: 1967-09-05
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Expires: 1984-06-23
Abstract
No abstract record available.
Inventors
- 👤 Roy M Waldby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:27
CPC Classifications
C; C23; C23F; C23F14/00; C23F14/02; B; B01; B01D; B01D3/00; B01D3/34; C07; C07C; C07C7/00; C07C7/20; Y; Y10; Y10S; Y10S203/00; Y10S203/19; Y10S585/00; Y10S585/949; Y10S585/952
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
80 words
A METHOD FOR INHIBITING THE FORMATION OF POLYMERS FROM MONOOLEFINS OR DIOLEFINS IN A FRACTIONATION ZONE COMPRISING ADDDING TO A CIRCULATING AQUEOUS SOLUTION OF AN ALKALI METAL NITRITE IN SAID FRACTIONATION ZONE .1 TO 1 PERCENT BY WEIGHT OF SAID AQUEOUS SOLUTION OF AT LEAST ONE COMPOUND WHICH HAS A RADICAL SELECTED FROM THE GROUP CONSISTING OF QUINOID, NITRO, AMINO, AND PHENOL, SAID COMPOUND HAVING POLYMERIZATION INHIBITING PROPERTIES WHEN IN COMBINATION WITH SAID AQUEOUS SOLUTION OF SAID ALKALI METAL NITRITE.
Claim 2
Independent Claim
80 words
A METHOD FOR INHIBITING THE FORMATION OF POLYMERS FROM MONOOLEFINS OR DIOLEFINS IN A FRACTIONATION ZONE COMPRISING ADDDING TO A CIRCULATING AQUEOUS SOLUTION OF AN ALKALI METAL NITRITE IN SAID FRACTIONATION ZONE .1 TO 1 PERCENT BY WEIGHT OF SAID AQUEOUS SOLUTION OF AT LEAST ONE COMPOUND WHICH HAS A RADICAL SELECTED FROM THE GROUP CONSISTING OF QUINOID, NITRO, AMINO, AND PHENOL, SAID COMPOUND HAVING POLYMERIZATION INHIBITING PROPERTIES WHEN IN COMBINATION WITH SAID AQUEOUS SOLUTION OF SAID ALKALI METAL NITRITE.
Claim 3
Dependent Claim
72 words
A COMPOSITION FOR INHIBITING THE FORMATION OF POLYMERS FROM NONOOLEFINS OR DIOLEFINS IN A FRACTIONATION ZONE AND IN LINES AND IN REBOILERS ASSOCIATED THEREWITH, SAID COMPOSITION COMPRISES (A) AN AQUEOUS METAL NITRILE SOLUTION CONTAINING .005 TO 5 PERCENT ALKALI METAL NITRITE BY WEIGHT OF SOLUTION AND, (B) .1 TO 1 WEIGHT PERCENT OF SOLUTION OF A POLYMERIZATION INHIBITING COMPOUND CONTAINING RADICALS SELECTED FROM THE GROUP CONSISTING OF QUINOID, NITRO, AMINO AND PHENOL.
Claim 4
Dependent Claim
72 words
A COMPOSITION FOR INHIBITING THE FORMATION OF POLYMERS FROM NONOOLEFINS OR DIOLEFINS IN A FRACTIONATION ZONE AND IN LINES AND IN REBOILERS ASSOCIATED THEREWITH, SAID COMPOSITION COMPRISES (A) AN AQUEOUS METAL NITRILE SOLUTION CONTAINING .005 TO 5 PERCENT ALKALI METAL NITRITE BY WEIGHT OF SOLUTION AND, (B) .1 TO 1 WEIGHT PERCENT OF SOLUTION OF A POLYMERIZATION INHIBITING COMPOUND CONTAINING RADICALS SELECTED FROM THE GROUP CONSISTING OF QUINOID, NITRO, AMINO AND PHENOL.
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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |