Patent US4615806A successfully refreshed from Google Patents.
US4615806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of iodide compounds from non-aqueous organic media
Assignee: Celanese International Corp
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Filing: 1985-03-07
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Granted: 1986-10-07
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Expires: 2005-03-07
Abstract
Abstract The invention relates to a method for removing iodide compounds from a non-aqueous organic medium, such as acetic acid. The medium is contacted with a macroreticulated strong-acid cation exchange resin which is stable in the organic medium and has at least one percent of its active sites converted to the silver or mercury form.
Inventors
- 👤 Charles B. Hilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:04
CPC Classifications
B; B01; B01D; B01D15/00; C; C07; C07C; C07C51/00; C07C51/42; C07C51/47; B01J; B01J39/00; B01J39/04; B01J39/05; C07C45/00; C07C45/78; C07C45/79
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
60 words
A method for removing iodide compounds from a non-aqueous organic medium comprising contacting the medium containing said iodide compounds with an ion exchange resin characterized in that the resin is a macroreticulated strong-acid cation exchanged resin which is stable in the organic medium and has at least one percent of its active sites converted to the silver or mercury form.
Claim 2
Independent Claim
60 words
A method for removing iodide compounds from a non-aqueous organic medium comprising contacting the medium containing said iodide compounds with an ion exchange resin characterized in that the resin is a macroreticulated strong-acid cation exchanged resin which is stable in the organic medium and has at least one percent of its active sites converted to the silver or mercury form.
Claim 3
Dependent Claim
30 words
The method of claim 1 wherein the non-aqueous organic medium is acetic acid and from about 25 to about 75 percent of the active sites are in the silver form.
Claim 4
Dependent Claim
25 words
The method of claim 2 also comprising contacting said acetic acid with a carbonaceous material prior to contacting the acid with the cation exchange resin.
Claim 5
Dependent Claim
12 words
The method of claim 2 wherein the acetic acid contains alkyl iodide.
Claim 6
Dependent Claim
23 words
The method of claim 4 wherein the alkyl iodide is selected from the group consisting of methyl iodide, hexyl iodide, and mixtures thereof.
Claim 7
Dependent Claim
39 words
The method of claim 5 wherein the acetic acid is contacted with the resin at a flow rate of about 0.5 to about 20 bed volumes per hour at a temperature from about 17° C. to about 100° C.
Claim 8
Dependent Claim
30 words
The method of claim 6 wherein the flow rate is about 6 to about 10 bed volumes per hour and the temperature is about 20° C. to about 35° C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-06 | 1990-04-07 | 1990-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-06 | 1994-04-07 | 1994-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-06 | 1998-04-07 | 1998-10-07 | $7700.00 | Window Closed / Lapsed |