Patent US4256912A successfully refreshed from Google Patents.
US4256912A
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Removal of soluble tellurium or compounds thereof from a crude glycol ester solution
Assignee: Lyondell Chemical Technology LP
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Filing: 1979-10-09
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Granted: 1981-03-17
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Expires: 1999-10-09
Abstract
Abstract A method for the removal of soluble tellurium compounds from vicinal glycol ester solutions, prepared with tellurium-halide ion catalyst systems, by diluting the tellurium-containing vicinal glycol ester solution with water and contacting said glycol-water solution with a strongly acidic sulfonated ion exchange resin leaving an essentially tellurium-free vicinal glycol ester reaction product which may then be processed to recover the desired ester product and by-products without loss of valuable tellurium. The tellurium may be recovered from the ion exchange resin and treated to recover tellurium in a form suitable for reuse.
Inventors
- 👤 Alfred A. Wolsky
- 👤 Richard B. Papp
- 👤 James G. Victor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:53
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/48; C07C67/56
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
115 words
A method for the removal of soluble tellurium or compounds thereof from tellurium-containing vicinal glycol ester solutions derived from the tellurium catalyzed liquid phase reaction of an olefin, molecular oxygen and an aliphatic monocarboxylic acid in the presence of a halide ion source which comprises the steps of: diluting the tellurium-containing vicinal glycol ester solution with at least about 50 percent by weight water; contacting the dilute water-tellurium-containing glycol ester solution at a temperature in the range of about 15° C. to 95° C. with a strongly acidic sulfonated ion exchange resin to retain and remove tellurium or compounds thereof from said dilute glycol ester solution; and recovering an essentially tellurium-free vicinal glycol ester solution.
Claim 2
Independent Claim
115 words
A method for the removal of soluble tellurium or compounds thereof from tellurium-containing vicinal glycol ester solutions derived from the tellurium catalyzed liquid phase reaction of an olefin, molecular oxygen and an aliphatic monocarboxylic acid in the presence of a halide ion source which comprises the steps of: diluting the tellurium-containing vicinal glycol ester solution with at least about 50 percent by weight water; contacting the dilute water-tellurium-containing glycol ester solution at a temperature in the range of about 15° C. to 95° C. with a strongly acidic sulfonated ion exchange resin to retain and remove tellurium or compounds thereof from said dilute glycol ester solution; and recovering an essentially tellurium-free vicinal glycol ester solution.
Claim 3
Dependent Claim
18 words
A method according to claim 1 wherein the vicinal glycol ester solution is an ethylene glycol ester solution.
Claim 4
Dependent Claim
15 words
A method according to claim 2 wherein the solution is an ethylene glycol diacetate solution.
Claim 5
Dependent Claim
22 words
A method according to claim 1 wherein the tellurium-containing vicinal glycol ester solution is diluted with about 80 percent by weight water.
Claim 6
Dependent Claim
21 words
A method according to claim 1 wherein the temperature is in the range of from about 15° C. to 30° C.
Claim 7
Dependent Claim
20 words
A method according to claim 1 wherein the strongly acidic sulfonated ion exchange resin is a perfluoroalkane sulfonic acid resin.
Claim 8
Independent Claim
113 words
A method for the removal of soluble tellurium or compounds thereof from a tellurium-containing ethylene glycol diacetate solution derived from the tellurium catalyzed liquid phase reaction of ethylene, molecular oxygen and acetic acid in the presence of a bromide ion source which comprises the steps of: diluting the tellurium-containing ethylene glycol diacetate solution with at least about 50 percent by weight water; contacting the dilute water-tellurium-containing ethylene glycol diacetate solution at a temperature of from about 15° C. to 30° C. with a strongly acidic sulfonated ion exchange resin to retain and remove tellurium or compounds thereof from said dilute ethylene glycol diacetate solution; and recovering an essentially tellurium-free ethylene glycol diacetate olution.
Claim 9
Independent Claim
113 words
A method for the removal of soluble tellurium or compounds thereof from a tellurium-containing ethylene glycol diacetate solution derived from the tellurium catalyzed liquid phase reaction of ethylene, molecular oxygen and acetic acid in the presence of a bromide ion source which comprises the steps of: diluting the tellurium-containing ethylene glycol diacetate solution with at least about 50 percent by weight water; contacting the dilute water-tellurium-containing ethylene glycol diacetate solution at a temperature of from about 15° C. to 30° C. with a strongly acidic sulfonated ion exchange resin to retain and remove tellurium or compounds thereof from said dilute ethylene glycol diacetate solution; and recovering an essentially tellurium-free ethylene glycol diacetate olution.
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) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |