Process for manufacturing high purity methane gas

Claim 1

A PROCESS FOR MANUFACTURING A HIGH PURITY METHANE GAS WHICH COMPRISES: PASSING A GAS MIXTURE CONSISTING ESSENTIALLY OF METHANE, STREAM, HYDROGEN, CARBON MONOXIDE AND CARBON DIOXIDE THROUGH A FIRST METHANIZATION REACTION ZONE UNDER ADIABATIC METHANIZATION REACTION CONDITIONS OF A TEMPERATURE IN THERANGE OF 250* TO 500*C AND A PRESSURE IN THE RANGE OF ATMOSPHERIC PRESSURE OF 100 JG/CM2G AND IN CONTACT WITH METHANIZATION CATALYST TO PRODUCE A FIRST INTERMEDIATE GAS, COOLING SAID FIRST INTERMEDIATE GAS TO A TEMPERATURE OF 40* TO 170*C AND REMOVING CONDENCED STREAM THERREFROM PASSING THE REMAINDER OF SAID COOLED FIRST INTERMEDIATE GAS THROUGH A CARBON DIOXIDE ABSORPTION ZONEE AND THEREIN REMOVING FROM SAID COOLED FIRST INTERMEDIATE GAS ALL OF THE CARBON DIOXIDE CONTAINED THEREIN IN EXCESS OF THE QUALITY CAPABLE OF REACTING WITH THE HYDROGEN CONTAINED IN SAID FIRST INTERMEDIATE GAS PRODUCT METHANE, WHEREBY TO 00000000 OBTAIN A SECOND INTERMEDIATE GAS FREE OF EXCESS CARBON DIOXIDE, RAISING THE TEMPERATURE OF SAID SECOND INTERMEDIATE GAS AND THEN PASSING THE ENTIRELY OF SAID SECOND INTERMEDIATE GAS THROUGH ONE OR MORE ADDITION METHANIZATION REACTION ZONES UNDER ADIABATIC METHANIZATON REACTION A CONDITIONS OF A TEMPERATURE IN THE RANGE OF ATMOSPHERIC PRESSURE CATALYST PRESSURE IN THE RANGE OF ATMOSPHERIC PRESSURE TO 100 KG/CM2 G AND IN CONTACT WITH METHANIZATION CATALYST TO METHANIZE THE REMAINAINING CARBON MONOXIDE AND CARBON DIOXIDE, AND OBTAINING FROM THE LAST OF THE METHALIZATION REACTION ZONES AN EFFULENT GAS OF HIGH PURITY METHANE.