Hydrocracking coal in molten zinc iodide

Abstract

Abstract COAL IS SLURRIED IN A MOLTEN SALT MIXTURE PREDOMINATING IN ZINC IODIDE AND THE COAL IS HYDROCRACKED AT A TEMPERATURE OF ABOUT 300*-500* C. AND AT A PRESSURE OF ABOUT 200-3000 P.S.I.G. IN THE PRESENCE OF HYDROGEN. THE MOLTEN SALT MIXTURE CONTAINS A SUBSTANTIAL PROPORTION OF ALKALI OR ALKALINE EARTH IODIDE AS A MELTING POINT DEPRESSANT, SUFFICIENT TO LOWER THE MELTING POINT FROM ABOUT 446* C., THE NORMAL MELTING POINT OF ZINC IODIDE, TO SUBSTANTIALLY BELOW 350* C. THE HYDROCRACKING CONVERTS NITROGEN AND OXYGEN IN THE COAL TO AMMONIA AND WATER, RESPECTIVELY, THE AMMONIA BEING CONVERTED IN PART TO AMMONIUM ODIDE ALL FUNCTION AS MELTING POINT DEPRESENTS MONIUM IODIDE AL FUNCTION AS MWLTING POINT DEPRESENTS FOR ZINC IODIDE. A MAJOR PORTION OF THE MOLTEN SALT MIXTURE, CONTAINING COAL RESIDUR, INCLUDING TAR AND ASH, IS RE- CYCLED TO THE HYDROCRACKING PROCESS. A MINOR PROPORTION OF THE RESULTING MOLTEN SALT MIXTURE FROM HYDROCRACKING IS SEPARATED AS A SLIP-STREAM AND PROCESSED FOR RECOVERY OF THE MOLTEN SALT MIXTURE THEREOF, AND CONVERSION OF ZINC SULFIDE AND AMMONIUM IOSIDE FORMED FROM HYDROCRACKING THE COAL, TO RECOVER THE ZINC AND IODIDE CONTENTS THEREOF AS ZINC ODIDE, WHICH IS ALSO RECYCLED TO THE COAL SLURRY OPERATION.

Inventors

• 👤 R Loth
• 👤 M Wald

Bibliographic Details