US3964993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of HF from the sludge resulting from the treatment of a hydrocarbon
Assignee: ConocoPhillips Co
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Filing: 1975-01-23
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Granted: 1976-06-22
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Expires: 1995-01-23
Abstract
Abstract A process for removing HF (hydrogen fluoride) from the sludge resulting from the HF treatment of a hydrocarbon is disclosed. The process comprises concurrently treating the sludge with aqueous caustic and a liquid aromatic hydrocarbon.
Inventors
- 👤 Hugh E. Romine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:22
CPC Classifications
C; C10; C10G; C10G17/00; C07; C07C; C07C2/00; C07C2/54; C10G17/02; C10G17/04; C10G17/06; C10G19/00; C10G19/02; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1206
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
140 words
A process for removing HF from the sludge resulting from the HF treatment of hydrocarbons, said process comprising: a. adding to the sludge, aqueous caustic and more than 10%, by volume, based on the sludge, of a liquid aromatic diluent containing at least 30 weight percent aromatics, to form an admixture, b. allowing the admixture of step (a) to form an aqueous phase and a hydrocarbon phase, and c. separating the aqueous phase and the hydrocarbon phase, said process being characterized further in that: a. the aqueous caustic solution contains from about 1 to about 50 weight percent caustic, and b. the amount and concentration of aqueous caustic are such as to provide an amount of caustic which is in the range of about 1 to about 1,000 times the stoichiometric requirement, based on the HF present in the sludge.
Claim 2
Dependent Claim
140 words
A process for removing HF from the sludge resulting from the HF treatment of hydrocarbons, said process comprising: a. adding to the sludge, aqueous caustic and more than 10%, by volume, based on the sludge, of a liquid aromatic diluent containing at least 30 weight percent aromatics, to form an admixture, b. allowing the admixture of step (a) to form an aqueous phase and a hydrocarbon phase, and c. separating the aqueous phase and the hydrocarbon phase, said process being characterized further in that: a. the aqueous caustic solution contains from about 1 to about 50 weight percent caustic, and b. the amount and concentration of aqueous caustic are such as to provide an amount of caustic which is in the range of about 1 to about 1,000 times the stoichiometric requirement, based on the HF present in the sludge.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein the source of the liquid aromatic diluent is a light cycle oil.
Claim 4
Dependent Claim
16 words
The process of claim 1 wherein the sludge is a by-product of a refinery alkylation process.
Claim 5
Dependent Claim
16 words
The process of claim 2 wherein the sludge is a by-product of a refinery alkylation process.
References Cited (Backward Citations)
US2413310A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |