Patent US3980720A successfully refreshed from Google Patents.
US3980720A
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Method of producing diol by hydrogenolysis of peroxide polymers with reactivation of Raney nickel catalyst
Assignee: Tosoh Corp
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Filing: 1974-12-20
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Granted: 1976-09-14
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Expires: 1994-12-20
Abstract
Abstract A poisoned Raney nickel catalyst from the hydrogenolysis of an organic peroxide polymer is reactivated by treating the catalyst with a 0.1-5 N solution of an activating reagent selected from the group consisting of ammonia, and an alkali metal or an alkaline earth metal hydroxide, carbonate or carboxylate having 1-4 carbon atoms at 20°-200°C under an inert gas atmosphere.
Inventors
- 👤 Shunsuke Mabuchi
- 👤 Kenji Tsuzuki
- 👤 Hideaki Matsunaga
- 👤 Sadami Shimizu
- 👤 Makoto Sumita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:14
CPC Classifications
B; B01; B01J; B01J25/00; B01J25/04; B01J25/02; C; C08; C08C; C08C19/00; C08C19/30; C08C19/34; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
A method for the hydrogenolysis of an organic peroxide polymer which comprises mixing a solution of the organic peroxide polymer with Raney nickel; hydrogenating the organic peroxide polymer with hydrogen to form a diol product; separating the poisoned Raney nickel; reactivating the poisoned Raney nickel by contacting with a 0.1-5 N aqueous or lower alcohol solution of an activating reagent selected from the group consisting of ammonia, alkaline earth metal hydroxides, alkali metal carbonates, alkaline earth metal carbonates and alkali metal carboxylates containing from 1 to 4 carbon atoms, and alkaline earth metal carboxylates containing from 1 to 4 carbon atoms at 20°-200°C under an inert gas atmosphere from 2 to 8 hours, and recycling the reactivated Raney nickel by mixing with a solution of the organic peroxide polymer.
Claim 2
Independent Claim
129 words
A method for the hydrogenolysis of an organic peroxide polymer which comprises mixing a solution of the organic peroxide polymer with Raney nickel; hydrogenating the organic peroxide polymer with hydrogen to form a diol product; separating the poisoned Raney nickel; reactivating the poisoned Raney nickel by contacting with a 0.1-5 N aqueous or lower alcohol solution of an activating reagent selected from the group consisting of ammonia, alkaline earth metal hydroxides, alkali metal carbonates, alkaline earth metal carbonates and alkali metal carboxylates containing from 1 to 4 carbon atoms, and alkaline earth metal carboxylates containing from 1 to 4 carbon atoms at 20°-200°C under an inert gas atmosphere from 2 to 8 hours, and recycling the reactivated Raney nickel by mixing with a solution of the organic peroxide polymer.
Claim 3
Dependent Claim
14 words
The method of claim 1, wherein said activating reagent is an alkali metal carbonate.
Claim 4
Dependent Claim
21 words
The method of claim 1, wherein said activating reagent is an alkali metal carboxylate having from 1 to 4 carbon atoms.
Claim 5
Dependent Claim
15 words
The method of claim 1, wherein said activating reagent is an alkaline earth metal hydroxide.
Claim 6
Dependent Claim
15 words
The method of claim 1, wherein said activating reagent is an alkaline earth metal carbonate.
Claim 7
Dependent Claim
22 words
The method of claim 1, wherein said activating reagent is an alkaline earth metal carboxylate having from 1 to 4 carbon atoms.
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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) | 1979-09-14 | 1980-03-15 | 1980-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-14 | 1984-03-15 | 1984-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-14 | 1988-03-15 | 1988-09-14 | $7700.00 | Window Closed / Lapsed |