Iron oxide hydraulic cement dehydrogenation catalyst

Claim 1

PROCESS OF DEHYDROGENATING A HYDROCARBON OF THE CLASS CONSISTING OF MONO-OLEFINS AND ALKYLATED AROMATIC HYDROCARBONS, WHICH COMPRISES CONTACTING A MIXTURE OF SAID HYDROCARBON AND AT LEAST TWO VOLUMES OF STEAM PER VOLUME OF HYDROCARBON AT A TEMPERATURE IN THE RANGE OF 550*C. AND 700*C. AND A PRESSURE NEAR ATMOSPHERIC WITH A CATALYST CONSISTING ESSENTIALLY OF IRON OXIDE, A MINOR AMOUNT OF AN ALKALINE COMPOUND OF AN ALKALI METAL, A MINOR AMOUNT OF CHROMIUM OXIDE, AND BETWEEN ABOUT 5% AND 30% BY WEIGHT OF A HYDRAULIC CEMENT CONTAINING FREE CALCIUM OXIDE WHICH IS NOT CHEMICALLY BOUND WITH ALUMINUM OR SILICON COMPOUNDS, SAID CATALYST HAVING AN INTERNAL SURFACE AREA LESS THAN 8 SQUARE METERS PER GRAM AND BEING CHARACTERIZED BY THE PRESENCE-OF MAGNETITE AND CALCIUM IRON OXIDE UPON X-RAY DIFFRACTION ANALYSIS.