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US3798178A Expired / Lapsed US ⏱️ 0.0 years remaining

Self-regenerative dehydrogenation catalyst

Assignee: Dow Chemical Co
•
Filing: 1972-02-17
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Granted: 1974-03-19
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Expires: 1992-02-17
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Abstract

Abstract METAL OXIDE DEHYDROGENATING CATALYSTS HAVING AN ELECTRICALLY CONDUCTING, DISCONTINUOUS AMOUNT OF CERTAIN SPECIFIC METALS INCORPORATED EITHER THROUGH THE BULK OF THE CATALYST OR DISTRIBUTED ON ITS SURFACES PROVIDE COMPARATIVELY HGH ELECTRICAL CONDUCTIVITY, AND CAN BE MORE UNIFORMLY HEATED BY USE OF AN ELECTRICAL CURRENT THAN SIMILAR CATALYSTS HAVING NO FREE METAL PRESENT. THE METAL-CONTAINING OR METAL-COATED CATALYSTS CAN COMPRISES THE ENTIRE MASS OF CATALYST IN A REACTOR, OR SUCH CATALYST CAN BE PLACED ADJACENT TO THE ELECTRODES AND IN INTIMATE CONTACT WITH CATALYST CONTAINING NO METAL TO PROMOTE MORE UNIFORM PASSAGE OF ELECTRICAL CURRENT THROUGH A CATALYST BED. THE NOVEL METHOD COMPRISES THE USE OF THE CATALYST HAVING METAL PARTICLES DISCONTINUOUSLY DISTRIBUTEED THROUGHOUT ITS BULK AS THE SOLE CATALYST, OR AS PART OF THE CATALYST BED IN CONTACT WITH ELECTRODES, ADMIXED WITH CATALYST CONTAINING NO METAL, TO DEHYDROGENATE HYDROCARBONS, WHILE PASSING AN ELECTRICAL CURRENT THROUGH THE CATALYST BED TO MAINTAIN DESIRED TEMPERATURE LEVELS.

Inventors

  • 👤 F Soderquist
  • 👤 L Martz

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 10:01
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/321; C07C5/324; C07C5/325; B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/862; B01J37/00; B01J37/34; B01J8/00; C07C5/327; C07C5/333; C07C5/3335; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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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) 1977-03-18 1977-09-17 1978-03-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-03-18 1981-09-17 1982-03-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-03-18 1985-09-17 1986-03-19 $7700.00 Window Closed / Lapsed

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