US3327013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective hydrogenation process and catalyst
Assignee: Dow Chemical Co
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Filing: 1965-12-02
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Granted: 1967-06-20
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Expires: 1985-12-02
Abstract
No abstract record available.
Inventors
- 👤 Ludo K Frevel
- 👤 Leonard J Kressley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:57
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/888; B01J23/72; B01J23/74; B01J23/75; B01J23/83; B01J23/847; B01J23/8472; B01J23/88; B01J23/885; C; C07; C07C; C07C5/00; C07C5/02; C07C5/08; C07C2523/00; C07C2523/12; C07C2523/16; C07C2523/20; C07C2523/22; C07C2523/24; C07C2523/28; C07C2523/30; C07C2523/32; C07C2523/34; C07C2523/70; C07C2523/72; C07C2523/74; C07C2523/75
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A PROCESS OF IMPROVING A SELECTIVE HYDROGENATION CATALYST CONTAINING AS ESSENTIAL INGREDIENTS COPPER AND FROM A TRACE TO ABOUT 20% BY WEIGHT BASED ON THE TOTAL ACTIVE INGREDIENTS OF AT LEAST ONE GROUP A METAL, AS DEFINED HEREIN, SAID CATALYST BEING SUITABLE FOR THE HYDROGENATION OF ACETYLENIC COMPOUNDS IN THE PRESENCE OF DIENES WHICH COMPRISES: (A) CONTACTING THE CATALYST WITH A BASIC ALKALI METAL COMPOUND TO FORM AN IMPREGNATED PRODUCT, (B) HEATING THE IMPREGNATED PRODUCT OF (A) AT A TEMPERATURE OF UP TO 650*C. TO EFFECT A REACTION WITH SAID BASIC ALKALI METAL COMPOUND, AND (C) LEACHING THE PRODUCT OF (B) WITH WATER.
Claim 2
Dependent Claim
103 words
A PROCESS OF IMPROVING A SELECTIVE HYDROGENATION CATALYST CONTAINING AS ESSENTIAL INGREDIENTS COPPER AND FROM A TRACE TO ABOUT 20% BY WEIGHT BASED ON THE TOTAL ACTIVE INGREDIENTS OF AT LEAST ONE GROUP A METAL, AS DEFINED HEREIN, SAID CATALYST BEING SUITABLE FOR THE HYDROGENATION OF ACETYLENIC COMPOUNDS IN THE PRESENCE OF DIENES WHICH COMPRISES: (A) CONTACTING THE CATALYST WITH A BASIC ALKALI METAL COMPOUND TO FORM AN IMPREGNATED PRODUCT, (B) HEATING THE IMPREGNATED PRODUCT OF (A) AT A TEMPERATURE OF UP TO 650*C. TO EFFECT A REACTION WITH SAID BASIC ALKALI METAL COMPOUND, AND (C) LEACHING THE PRODUCT OF (B) WITH WATER.
References Cited (Backward Citations)
US2426604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |