Patent US4390431A successfully refreshed from Google Patents.
US4390431A
Expired / Lapsed
US
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Process for treating aqueous streams containing aluminum
Assignee: IFP Energies nouvelles
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Filing: 1981-05-08
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Granted: 1983-06-28
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Expires: 2001-05-08
Abstract
Abstract A process for treating an aqueous phase obtained by acidic or basic washing of a hydrocarbon phase comprising a soluble aluminum compound in solution, characterized in that it is neutralized at a pH of from 6 to 8.5, treated with an additive selected from the alkaline-earth metal oxides, hydroxides and carbonates, at a temperature ranging from 90 DEG C. to the boiling point, the molar ratio of the additive to aluminum being from 1/10 to 10/1, and separated thereafter from the insoluble phase of precipitate.
Inventors
- 👤 Pierre Amigues
- 👤 Yves Chauvin
- 👤 Dominique Commereuc
- 👤 Jean Gaillard
- 👤 Nhu H. Phung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:20
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C07; C07C; C07C7/00; C07C7/148; C07C7/14833; C07C7/1485; C22; C22B; C22B21/00; C22B21/0015; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/911; Y10S210/912
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
158 words
A process for removing aluminum values from a basic aqueous phase containing a water-soluble aluminum compound in solution, said basic aqueous phase resulting from the destruction of at least one of a hydrocarbon dimerization or oligomerization catalyst comprising a hydrocarbon-soluble aluminum compound and nickel by basic washing of a hydrocarbon phase containing said catalyst with an aqueous sodium hydroxide or potassium hydroxide solution, said process comprising neutralizing said aqueous phase with acid to bring it to pH of from 6 to 8.5, treating the resultant neutralized aqueous phase with an additive, said additive being an alkaline earth metal oxide, hydroxide or carbonate or a mixture thereof, at a temperature of from 90° C. to the boiling point of said aqueous phase, the molar ratio of the additive to aluminum being from 1/10 to 10/1, for a time sufficient to form an insoluble phase of precipitate, and thereafter separating the resultant aqueous phase, from the insoluble phase of precipitate.
Claim 2
Dependent Claim
158 words
A process for removing aluminum values from a basic aqueous phase containing a water-soluble aluminum compound in solution, said basic aqueous phase resulting from the destruction of at least one of a hydrocarbon dimerization or oligomerization catalyst comprising a hydrocarbon-soluble aluminum compound and nickel by basic washing of a hydrocarbon phase containing said catalyst with an aqueous sodium hydroxide or potassium hydroxide solution, said process comprising neutralizing said aqueous phase with acid to bring it to pH of from 6 to 8.5, treating the resultant neutralized aqueous phase with an additive, said additive being an alkaline earth metal oxide, hydroxide or carbonate or a mixture thereof, at a temperature of from 90° C. to the boiling point of said aqueous phase, the molar ratio of the additive to aluminum being from 1/10 to 10/1, for a time sufficient to form an insoluble phase of precipitate, and thereafter separating the resultant aqueous phase, from the insoluble phase of precipitate.
Claim 3
Dependent Claim
26 words
A process according to claim 1, wherein the soluble aluminum compound dissolved in the hydrocarbon phase is a trialkylaluminum, an alkylaluminum halide or an aluminum halide.
Claim 4
Dependent Claim
23 words
A process according to claim 1, wherein the additive is a solid magnesium, calcium or barium oxide, hydroxide or carbonate, in powdered form.
Claim 5
Dependent Claim
14 words
A process according to claim 3, wherein the additive is calcium oxide or hydroxide.
Claim 6
Dependent Claim
25 words
A process according to claim 1, wherein the treatment of the neutralized aqueous phase is effected at a temperature of from 90° to 105° C.
Claim 7
Dependent Claim
18 words
A process according to claim 1, wherein the period of treatment is from 10 minutes to 2 hours.
Claim 8
Dependent Claim
23 words
A process according to claim 1, wherein the separation of the aqueous phase from the insoluble phase of precipitate is effected by decantation.
Claim 9
Dependent Claim
21 words
A process according to claim 1, wherein the molar ratio of the additive to the aluminum is from 1/5 to 5/1.
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) | 1986-06-27 | 1986-12-27 | 1987-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-27 | 1990-12-27 | 1991-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-27 | 1994-12-27 | 1995-06-28 | $7700.00 | Window Closed / Lapsed |