US3666828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensate purification and recovery for use as dilution steam to pyrolysis furnace
Assignee: Phillips Petroleum Co
•
Filing: 1970-09-14
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Granted: 1972-05-30
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Expires: 1990-09-14
Abstract
Abstract A condensate purification and recovery method and apparatus for purifying water from the pyrolysis tower of a naphtha cracking unit which involves settling the water and separating the oil and producing dilution steam and oil, both of which are returned to the cracking unit.
Inventors
- 👤 Carl A Post
- 👤 Eldred J Cabanaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:26
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14; C10G9/16; B; B01; B01D; B01D17/00; B01D17/02; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/95
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
19 words
The method of claim 1 in which said separated oil and said steam are reintroduced into said cracking unit.
Claim 2
Dependent Claim
23 words
The method of claim 2 in which said water circulated from said stripping tower to said reboiler is circulated through said separation zone.
Claim 3
Dependent Claim
12 words
The method of claim 3 in which said water is filtered twice.
Claim 4
Dependent Claim
24 words
The method of claim 4 in which an antifoam agent and an anticorrosion agent are introduced into said water circulated from said stripping tower.
Claim 5
Dependent Claim
175 words
Apparatus for the recovery of condensate from a cracking unit, said condensate comprising an oil and water mixture which comprises: a. a settling tank adapted to receive said mixture and to stratify said oil therein; b. oil removal means adapted to remove said stratified oil from said settling tank; c. at least one filter adapted to receive water from said settling tank; d. a coalescer in open communication with said filter, said coalescer being adapted for separation of an oil stream and a stream comprising water therefrom; e. a stripper adapted for the introduction of steam and said water from said coalescer and for the removal of oil therefrom; f. circulation means for circulating water from said stripper through an after-defined separation zone and an after-defined heating means; g. heating means adapted to receive water from said after-defined separation zone and to discharge a steam-water mixture to said separation zone; and, h. a separation zone adapted to receive said steam-water mixture and to separate a stream comprising steam and to discharge water to said stripper.
Claim 6
Dependent Claim
22 words
The apparatus defined in claim 6 in which said circulation means comprises a pump and said heating means comprises a thermosyphon reboiler.
Claim 7
Dependent Claim
16 words
The apparatus defined in claim 7 in which said stripper comprises a separation tower containing trays.
Claim 8
Dependent Claim
16 words
The apparatus defined in claim 8 in which a demister is positioned within said separation zone.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |