Process for manufacturing conjugated diolefins from alkyl-1,3-dioxanes
Abstract
Abstract A PROCESS FOR MANUFACTURING CONJUGATED DIOLEFINS FROM AN ALKYL-1,3-DIOZANE WHICH COMPRISES PASSING SAID DIOXANE, AT A TEMPERATURE OF ABOUT 250 TO 500* C., OVER A CATALYST COMPRISING A COMPOUND OF AN ELEMENT SELECTED FROM GROUPS II-A AND II-B OF THE PERIODIC TABLE AND A PRECURSOR OF PHOSPHORIC ANHYDRIDE DEPOSITED ON A SILICA CARRIER, THE GROUP II-A AND GROUP II-B ELEMENT, EXPRESSED AS THE OXIDE, BEING PRESENT IN AN AMOUNT OF ABOUT 2 TO 20% BY WEIGHT, BASED ON THE TOTAL CATALYST AND THE PHOSPHORIC ANHYDRIDE PRECURSOR, EXPRESSED AS P2/5, BEING PRESENT IN AN AMOUNT OF ABOUT 2 TO 20% BY WEIGHT, BASED ON THE TOTAL CATALYST, THE MOLAR RATIO OF P2O5 TO THE GROUPS II-A AND II-B METAL OXIDE BEING ABOUT 0.1 TO 0.6, SAID PROCESS BEING CONDUCTED IN THE PRESENT OF A STEAM DILUENT HAVING A PHOSPHORIC ACID CONTENT OF ABOUT 0.001 TO 0.1% BY WEIGHT, EXPRESSED AS P2O5, THE RATIO BY VOLUME OF WATER TO THE DIOXANE, CALCULATED IN THE LIQUID STATE BEING ABOUT 0.1 TO 15, AND RECOVERING THE CONJUGATED DIOLEFINS.
Inventors
- 👤 Bernard Juguin
- 👤 Bernard Torck
Bibliographic Details
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