Patent US3715404A successfully refreshed from Google Patents.
US3715404A
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Process for selective hydrogenation
Assignee: F Hoffmann La Roche AG
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Filing: 1968-09-19
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Granted: 1973-02-06
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Expires: 1988-09-19
Abstract
Abstract A process for selective hydrogenation of unsaturated organic compounds having at least four carbon atoms by carrying out said hydrogenation in a liquid phase in the presence of an organic sulfur compound utilizing a partially deactivated palladium catalyst.
Inventors
- 👤 H Lindlar
- 👤 R Dubuis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:19
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/20; B01J23/00; B01J23/38; B01J23/40; B01J23/44; C; C07; C07C; C07C29/00; C07C29/17
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
180 words
A process for the hydrogenation of organic compounds selected from the group consisting of aliphatic hydrocarbons containing from four to 45 carbon atoms and having one or more triple bonds, aryl and cycloalkyl hydrocarbons containing from eight to 45 carbon atoms and having an aliphatic side chain with one or more triple bonds, hydroxy substituted aliphatic hydrocarbons containing from four to 45 carbon atoms and one or more triple bonds, cycloalkyl hydrocarbons containing from eight To 45 carbon atoms having a hydroxy substituted aliphatic side chain with one or more triple bonds, carboxy substituted aliphatic hydrocarbons containing from four to 45 carbon atoms and having one or more triple bonds and aryl containing hydrocarbons containing six to 45 carbon atoms and at least one keto group directly attached to the aryl moiety comprising hydrogenating said organic compound in a liquid medium in the presence of a palladium catalyst partially deactivated with lead, bismuth, copper, zinc, tin mercury, cadmium or thorium; and a sulfur derivative of the formula: HO-(CH2) x-S-(CH2)x-S-(CH2)x-OH wherein x is an integer of from 1 to 6 inclusive.
Claim 2
Dependent Claim
180 words
A process for the hydrogenation of organic compounds selected from the group consisting of aliphatic hydrocarbons containing from four to 45 carbon atoms and having one or more triple bonds, aryl and cycloalkyl hydrocarbons containing from eight to 45 carbon atoms and having an aliphatic side chain with one or more triple bonds, hydroxy substituted aliphatic hydrocarbons containing from four to 45 carbon atoms and one or more triple bonds, cycloalkyl hydrocarbons containing from eight To 45 carbon atoms having a hydroxy substituted aliphatic side chain with one or more triple bonds, carboxy substituted aliphatic hydrocarbons containing from four to 45 carbon atoms and having one or more triple bonds and aryl containing hydrocarbons containing six to 45 carbon atoms and at least one keto group directly attached to the aryl moiety comprising hydrogenating said organic compound in a liquid medium in the presence of a palladium catalyst partially deactivated with lead, bismuth, copper, zinc, tin mercury, cadmium or thorium; and a sulfur derivative of the formula: HO-(CH2) x-S-(CH2)x-S-(CH2)x-OH wherein x is an integer of from 1 to 6 inclusive.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein said palladium catalyst is partially deactivated with lead.
Claim 4
Dependent Claim
25 words
The process of claim 1 wherein at least 0.1 percent by weight of said sulfur derivative, based on the weight of said catalyst, is used.
Claim 5
Dependent Claim
11 words
The process of claim 1 wherein said sulfur derivative is 1,2-bis-(2-hydroxyethylthio)-ethane.
Claim 6
Dependent Claim
14 words
The process of claim 1 wherein said organic compound is a hydroxy substituted hydrocarbon.
Claim 7
Dependent Claim
11 words
The process of claim 5 wherein said organic compound is 3-methyl-butyn-(1)-ol-(3).
Claim 8
Dependent Claim
14 words
The process of claim 5 wherein said palladium catalyst is partially deactivated with lead.
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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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |