Manufacture of low molecular unsaturated hydrocarbons

Claim 1

A PROCESS FOR THE MANUFACTURE OF LOW MOLECULAR WEIGHT UNSATURATED ALIPHATIC HYDROCARBONS RICH IN ACETYLENE WHICH COMPRISES (A) FORMING A STREAM OF HOT COMBUSTION GAS OBTAINED BY COMBUSTION OF AN EXCESS OF HYDROGEN WITH OXYGEN AND CONTAINING OXYGEN ATOMS, OXYGEN MOLECULES AND OXYGEN-CONTAINING RADICALS FORMED BY DISSOCIATION; (B) INTRODUCING A SECONDARY GAS INTO SAID STREAM OF HOT COMBUSTION GAS FOR RECOMBINING THE OXYGEN ATOMS, ATOMS, OXYGEN MOLECULES AND OXYGEN-CONTAINING RADICALS THEREIN AND THEREBY FORMING A STREAM OF CARRIER GAS WHICH IS SUBSTANIALLY FREE FROM MOLECULAR OXYGEN AND CONTAINS HYDROGEN, SAID SECONDARY GAS BEING SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, STEAM AND MIXTURE THEREOF AND HAVING A TEMPERATURE OF AT LEAST ABOUT 150* C. BUT A LOWER TEMPERATURE THAN THE COMBUSTION GAS AND THE AMOUNT THEREOF BEING ABOUT 1 TO 8% BY WEIGHT, CALCULATED UPON THE TOTAL AMOUNT OF CARRIER GAS; (C) PASSING THE CARRIER GAS THROUGH A RESTRICTED OPENING INTO A REACTION ZONE FOR ACCELERATING SAID STREAM OF CARRIER GAS; AND (D) CONTACTING THE ACCELERATED STREAM OF CARRIER GAS WITH A HYDROCARBON THAT IS LIQUID AT ROOM TEMPERATURE FOR 10-2 TO 10-4 SECONDS FOR PYROLSIS OF SAID HYDROCARBON, THE RATE OF FEED OF HYDROCARBON BEING ADJUSTED TO MAINTAINED THE TEMPERATURE OF THE REACTED GAS MIXTURE AT AT LEASTE ABOUT 1000* C.