US4139451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for dewatering coke tar-water mixtures
Assignee: ChampionX LLC
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Filing: 1977-12-12
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Granted: 1979-02-13
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Expires: 1997-12-12
Abstract
Abstract A method for dewatering tar-water mixtures obtained from the coking of coal is disclosed. The method involves adding to the tar from 150 to 3,000 ppm of a di-tri butyl ethoxylated phenol compound dissolved in water, heating the tar-water mixture, and then agitating it to allow contact with the chemical additive. This is followed by allowing the mixture to settle forming an aqueous upper phase and a lower dewatering tar phase.
Inventors
- 👤 Audrone M. Pavilcius
- 👤 William H. Lindenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:15
CPC Classifications
C; C10; C10C; C10C1/00; C10C1/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
198 words
A method for dewatering tar obtained as a by-product in the production of foundry and metallurgical coke from coal which comprises: A. collecting a tar-water mixture containing greater than 5% by weight water as a by-product from the production of coke from coal; B. adding to said tar-water mixture from 150 to 3,000 ppm of a di-tri butyl ethoxylated phenol said di-tri butyl ethoxylated phenol having been prepared by reacting a mixture of di and tri butyl phenols with from 4-20 moles of ethylene oxide per mole of phenol, said di-tri butyl ethoxylated phenol being present in a 20-60% by weight aqueous solution; C. heating said tar-water mixture to a temperature of from 130°-250° F. to increase its fluidity; D. agitating said tar-water mixture to mix it with the phenol compound of step B; E. continuing steps C and D for a period of time to allow interaction of the compound of step B with the tar-water mixture; F. discontinuing agitation, thereby allowing the water contained in the tar-water mixture to rise to the surface forming an aqueous upper phase and a lower dewatered tar phase; G. removing said aqueous upper phase; and, H. recovering a dewatered tar.
Claim 2
Independent Claim
198 words
A method for dewatering tar obtained as a by-product in the production of foundry and metallurgical coke from coal which comprises: A. collecting a tar-water mixture containing greater than 5% by weight water as a by-product from the production of coke from coal; B. adding to said tar-water mixture from 150 to 3,000 ppm of a di-tri butyl ethoxylated phenol said di-tri butyl ethoxylated phenol having been prepared by reacting a mixture of di and tri butyl phenols with from 4-20 moles of ethylene oxide per mole of phenol, said di-tri butyl ethoxylated phenol being present in a 20-60% by weight aqueous solution; C. heating said tar-water mixture to a temperature of from 130°-250° F. to increase its fluidity; D. agitating said tar-water mixture to mix it with the phenol compound of step B; E. continuing steps C and D for a period of time to allow interaction of the compound of step B with the tar-water mixture; F. discontinuing agitation, thereby allowing the water contained in the tar-water mixture to rise to the surface forming an aqueous upper phase and a lower dewatered tar phase; G. removing said aqueous upper phase; and, H. recovering a dewatered tar.
Claim 3
Dependent Claim
21 words
A method of claim 1 wherein the di-tri butyl ethoxylated phenol contains 12 moles of ethylene oxide per mole of phenol.
Claim 4
Dependent Claim
16 words
The method of claim 1 where agitating the tar-water mixture is accomplished utilizing a recirculating pump.
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein in step C the tar-water mixture is heated to a temperature of from 160° to 220° F.
Claim 6
Dependent Claim
23 words
The method of claim 1 wherein from 200 to 2,000 ppm of the di-tri butyl ethoxylated phenol is added to the tar-water mixture.
References Cited (Backward Citations)
US3135681A
Cited
US3880752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |