Patent US2794702A successfully refreshed from Google Patents.
Patent US4054507A successfully refreshed from Google Patents.
US4054507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dewatering water-wet particles and blending the particles in a liquid carrier
Assignee: Marathon Oil Co
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Filing: 1976-04-09
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Granted: 1977-10-18
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Expires: 1996-04-09
Abstract
Abstract Slurrying of water-wet wax particles in liquid hydrocarbon carrier is improved by introducing the water wet particles in a rotating perforated cylinder, e.g., screen, immersed in a flowing stream of liquid carrier above a settling chamber. The flow rates of the liquid carrier and the water-wet particles are controlled to give desired water separation and slurry concentrations for subsequent pipelining. The water falls to the bottom of the settling chamber for removal.
Inventors
- 👤 George A. Pouska
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:51
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/06; B01D33/11; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391; Y10T137/794; Y10T137/8049
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
166 words
In a process wherein wax particles are congealed in the presence of water and wherein the water containing congealed wax particles is slurried in a liquid, water-immiscible carrier having a density less than water to obtain a pumpable slurry, the improvement of minimizing water contamination in the slurry comprising passing said water containing congealed wax particles into a chamber having a rotating perforated cylinder mounted therein, the cylinder having an inlet and outlet means, through which the water-immiscible carrier flows; the cross-sectional area of the cylinder, the diameter and number of the perforations within the cylinder being sized, the flow rates of the water-immiscible carrier and the water containing the congealed particles, and the rotation of the cylinder being sufficiently fast to permit the water to pass through the perforations and form an interface with said liquid carrier below the cylinder, and a slurry containing substantially water-free congealed wax particles and liquid carrier is withdrawn through the outlet of the cylinder to obtain the pumpable slurry.
Claim 2
Dependent Claim
166 words
In a process wherein wax particles are congealed in the presence of water and wherein the water containing congealed wax particles is slurried in a liquid, water-immiscible carrier having a density less than water to obtain a pumpable slurry, the improvement of minimizing water contamination in the slurry comprising passing said water containing congealed wax particles into a chamber having a rotating perforated cylinder mounted therein, the cylinder having an inlet and outlet means, through which the water-immiscible carrier flows; the cross-sectional area of the cylinder, the diameter and number of the perforations within the cylinder being sized, the flow rates of the water-immiscible carrier and the water containing the congealed particles, and the rotation of the cylinder being sufficiently fast to permit the water to pass through the perforations and form an interface with said liquid carrier below the cylinder, and a slurry containing substantially water-free congealed wax particles and liquid carrier is withdrawn through the outlet of the cylinder to obtain the pumpable slurry.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein the water containing the congealed particles enters the cylinder at an angle to the flow of the liquid carrier.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein said carrier liquid is a liquid hydrocarbon.
Claim 5
Dependent Claim
21 words
The method of claim 3 wherein said liquid hydrocarbon is an overhead fraction from the fractionation of a waxy crude oil.
Claim 6
Dependent Claim
21 words
The method of claim 1 wherein the average diameter of the congealed wax particles is about 0.5 to about 50 mm.
Claim 7
Dependent Claim
13 words
The method of claim 1 wherein the congealed wax particles are substantially spherical.
Claim 8
Dependent Claim
22 words
The method of claim 1 wherein the velocity of the liquid carrier passing through the cylinder is less than about 0.1 ft/sec.
Claim 9
Dependent Claim
30 words
The method of claim 1 wherein the concentration of the congealed wax particles in the liquid carrier exiting from the cylinder is about 5 to about 55 percent by weight.
Claim 10
Dependent Claim
30 words
The method of claim 1 wherein the temperature of the congealed wax particles within the chamber is below the solution temperature of the congealed wax particles in the liquid carrier.
Claim 11
Dependent Claim
18 words
The method of claim 1 wherein the slurry is withdrawn from the device under substantially laminar flow conditions.
Claim 12
Dependent Claim
18 words
The method of claim 1 wherein the slurry is withdrawn from the cylinder under substantially transitional flow conditions.
Claim 13
Dependent Claim
19 words
The method of claim 1 wherein the dewatered slurry is withdrawn from said device under substantially turbulent flow conditions.
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) | 1980-10-17 | 1981-04-18 | 1981-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-17 | 1985-04-18 | 1985-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-17 | 1989-04-18 | 1989-10-18 | $7700.00 | Window Closed / Lapsed |