Patent US3876555A successfully refreshed from Google Patents.
US3876555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Membrane catalysts for carrying out simultaneous processes involving evolution and consumption of hydrogen
Assignee: Individual
•
Filing: 1973-05-16
•
Granted: 1975-04-08
•
Expires: 1993-05-16
Abstract
Abstract A membrane catalyst for carrying out simultaneous processes involving evolution and consumption of hydrogen, which membrane catalyst is in the form of a cellular foil made of an alloy of palladium and at least one other element selected from the elements in group VIII of the Periodic System other than palladium, gold, copper, or boron, the foil having oppositely directed alternate projections of hemispherical or halfellipsoidal shapes, the ratio of the projection height to the foil thickness being within the range from 10 to 200:1. If more than one foil membrane is used in the process, the foils are positioned parallel to one another so that the projections of one foil oppose the projections of the neighboring one. A gap must be provided between the foils to allow the passage of the starting material and the discharge of the reaction products.
Inventors
- 👤 Vladimir Mikhailovich Gryaznov
- 👤 Viktor Sergeevich Smirnov
- 👤 Alexander Petrovich Mischenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:03
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/08; C07C4/12; B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/46; B01J23/70; B01J23/89; B01J23/892; B01J35/00; B01J35/50; B01J35/58; B01J35/59; C07C4/14; C07C4/18; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3335; C07C5/3337; C07C2521/00; C07C2521/02; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/44; C07C2523/48; C07C2523/52; C07C2523/70; C07C2523/72; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
99 words
A MEMBRANE CATALYST FOR SIMULTANEOUSLY CARRYING OUT PROCESSES INVOLVING EVOLUTION AND CONSUMPTION OF HYDROGEN, SAID MEMBRANE CATALYST COMPRISING A CELLULAR FOIL MADE OF AN ALLOY OF PALLADIUM WITH ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF GROUP VIII ELEMENT OF THE PERIODIC SYSTEM OTHER THAN PALLADIUM, GOLD, COPPER AND BORON, THE PALLADIUM CONTEN BEING FROM 5 TO 98 PER CENT, SAID FOIL INCLUDING ALTERNATING PROJECTIONS AT THE SURFACE EXTENDING IN OPPOSITE DIRECTION AND ARRANGED IN ROWS, THE RATIO OF THE HEIGHT OF THE PROJECTIONS TO THE THICKNESS OF THE FOIL BEING WITHIN THE RANGE OF FROM 10 TO 200:1.
Claim 2
Dependent Claim
99 words
A MEMBRANE CATALYST FOR SIMULTANEOUSLY CARRYING OUT PROCESSES INVOLVING EVOLUTION AND CONSUMPTION OF HYDROGEN, SAID MEMBRANE CATALYST COMPRISING A CELLULAR FOIL MADE OF AN ALLOY OF PALLADIUM WITH ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF GROUP VIII ELEMENT OF THE PERIODIC SYSTEM OTHER THAN PALLADIUM, GOLD, COPPER AND BORON, THE PALLADIUM CONTEN BEING FROM 5 TO 98 PER CENT, SAID FOIL INCLUDING ALTERNATING PROJECTIONS AT THE SURFACE EXTENDING IN OPPOSITE DIRECTION AND ARRANGED IN ROWS, THE RATIO OF THE HEIGHT OF THE PROJECTIONS TO THE THICKNESS OF THE FOIL BEING WITHIN THE RANGE OF FROM 10 TO 200:1.
Claim 3
Dependent Claim
36 words
A membrane catalyst as claimed in claim 1 wherein said projections are hemispherical in shape, the distance between the centers of one alternating set of projections being at least equal to 2 diameters of the hemispheres.
Claim 4
Dependent Claim
41 words
A membrane catalyst as claimed in claim 1 wherein said projections are half-ellipsoidal in shape, one alternating set of projections having main axes which are arranged at angles from 30.degree. to 90.degree. with respect to the other set of alternating projections.
Claim 5
Dependent Claim
135 words
A membrane catalyst for simultaneously carrying out processing involving evolution and consumption of hydrogen, said membrane catalyst consisting of at least two cellular foils, each made of an alloy of palladium with one element selected from the group consisting of group VIII element of the Periodic System other than palladium, gold, copper and boron, the palladium content being from 5 to 98 per cent, each said foil having alternating and oppositely directed projections arranged in rows, the ratio of the height of the projections to the foil thickness being within the range of from 10 to 200:1, said foils being arranged so that the projections of one foil oppose the projections of the neighboring one, and a gap is defined between the foils for passage of the starting material and discharge of the reaction products.
Claim 6
Dependent Claim
135 words
A membrane catalyst for simultaneously carrying out processing involving evolution and consumption of hydrogen, said membrane catalyst consisting of at least two cellular foils, each made of an alloy of palladium with one element selected from the group consisting of group VIII element of the Periodic System other than palladium, gold, copper and boron, the palladium content being from 5 to 98 per cent, each said foil having alternating and oppositely directed projections arranged in rows, the ratio of the height of the projections to the foil thickness being within the range of from 10 to 200:1, said foils being arranged so that the projections of one foil oppose the projections of the neighboring one, and a gap is defined between the foils for passage of the starting material and discharge of the reaction products.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |