US3761579A
Expired / Lapsed
US
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Hydrogen iodide
Assignee: BP Chemicals Ltd
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Filing: 1971-09-01
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Granted: 1973-09-25
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Expires: 1991-09-01
Abstract
Abstract Aqueous hydrogen iodide is prepared by the reaction of iodine, water and carbon monoxide in a reaction medium containing a strong acid at temperatures in the range from about 75* to about 200* C and pressures from about 25 to about 500 psig employing a rhodium- or iridium-containing catalyst.
Inventors
- 👤 B Curtis
- 👤 L Fannin
- 👤 F Paulik
- 👤 J Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:44
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/42; C01B7/00; C01B7/13; C01B7/135; C07; C07C; C07C17/00; C07C17/093; C07C17/16
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
44 words
The process of claim 1 wherein the amount of catalyst present is that required to provide a concentration of the soluble metal component in the range from about 10 to about 3000 parts by weight per million parts by weight of the reaction medium.
Claim 2
Dependent Claim
18 words
The process of claim 2 wherein the weight ratio of iodine to hydrogen iodide is below about 0.7.
Claim 3
Dependent Claim
22 words
The process of claim 3 wherein the metal component of said catalyst is (Rh(CO)2Cl)2 and the iodine component is aqueous hydrogen iodide.
Claim 4
Dependent Claim
23 words
The process of claim 3 wherein the metal component of said catalyst is rhodium oxide and the iodine component is aqueous hydrogen iodide.
Claim 5
Dependent Claim
23 words
The process of claim 3 wherein the metal component of said catalyst is rhodium iodide and the iodine component is aqueous hydrogen iodide.
Claim 6
Dependent Claim
23 words
The process of claim 3 wherein the metal component of said catalyst is iridium chloride and the iodine component is aqueous hydrogen iodide.
Claim 7
Dependent Claim
70 words
The process of claim 4 wherein said temperature is from about 100* to 150* C, said catalyst is present in the amount required to provide a concentration from about 200 to about 1500 parts of soluble rhodium per million parts of the reaction medium, said HI to water ratio is from about 0.3 to about 0.6 and said partial pressure of CO is from about 25 to about 75 psia.
Claim 8
Dependent Claim
69 words
The process of claim 5 wherein said temperature is from about 100* to 150* C, said catalyst is present in the amount required to provide a concentration from about 200 to about 1500 parts of soluble rhodium per million parts of the reaction medium, said HI to water ratio is from about 0.3 to about 0.6, and said partial pressure of CO is from about 25 to 75 psia.
Claim 9
Dependent Claim
70 words
The process of claim 6 wherein said temperature is from about 100* to 150* C, said catalyst is present in an amount required to provide a concentration from about 200 to about 1500 parts of soluble rhodium per million parts of the reaction medium, said HI to water ratio is from about 0.3 to aabout 0.6., and said partial pressure of CO is from about 25 to about 75 psia.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |