Production of fuel gases

Claim 1

THE PROCESS OF INCREASING THE HEATING VALUE OF TAIL GAS OBTAINED BY REACTING CO AND H2 IN THE PRESENCE OF A SYNTHESIS CATALYST AT SYNTHESIS CONDITIONS AND REMOVING NORMALLY LIQUID SYNTHESIS PRODUCTS FROM THE TOTAL SYNTHESIS PRODUCT, WHICH COMPRISES CONTACTING A TAIL GAS OF THE TYPE SPECIFIED WHICH CONTAINS ABOUT 10-20% PER VOLUME OF HYDROGEN, 1-5% PER VOLUME OF CARBON MONOXIDE AND 18-40% PER VOLUME OF SATURATED AND UNSATURATED NORMALLY GASEOUS HYDROCARBONS INCLUDING ABOUT 2-4.5 % PER VOLUME OF UNSATURATES IN A CONVERSION ZONE WITH A HYDROGENATING CATALYST AT HYDROGENATING CONDITIONS CONDUCIVE TO THE HYDROGENATION OF HYDROGENATABLE TAIL GAS CONSTITUENTS WITH HYDROGEN PRESENT IN THE TAIL GAS AND TO THE SUBSTANTIALLY EXCLUSIVE FORMATION OF SUBSTANTIALLY SATURATED NORMALLY GASEOUS HYDROCARBONS, AND WITHDRAWING FROM SAID CONVERSION ZONE A TOTAL HYDROGENATED PRODUCT CONSISTING ESSENTIALLY OF A NORMALLY GASEOUS MIXTURE OF HIGH HEATING VALUE HAVING A HYDROGEN CONTENT AMOUNTING TO ONLY A SMALL FACTION OF THAT OF SAID TAIL GAS.