Separation of low boiling gas mixtures

Claim 1

THE METHOD OF SEPARATING GAS MIXTURES BY LIQUEFACTION AND FRACTIONATION WHICH COMPRISES CHARGING THE MAJOR PROPORTION OF A GAS MIXTURE TO BE SEPARATED AT A SUPER-ATMOSPHERIC PRESSURE TO CHILLING AND PURIFICATION MEANS TO PRODUCE COLD CLEAN GAS, CHILLING AND PURIFYING A MINOR PROPORTION OF SAID GAS MIXTURE IN EQUIPMENT SEPARATE FROM SAID MEANS AT SUBSTANTIALLY SAID SUPER-ATMOSPHERIC PRESSURE SO AS TO COOL SAID MINOR PROPORTION AND REMOVE AT LEAST THE MAJOR PROPORTION OF ITS SOLIDIFYING CONSTITUENTS, SAID SEPARATE EQUIPMENT COMPRISING HEAT EXCHARGE MEANS OPERATING BY THE RECUPERATIVE PRINCIPLE IN CHILLING CYCLES AND CYCLES SERVING THE EVAPORATION OF SOLIDIFIED GAS MIXTURE CONSTITUENTS DEPOSITED IN SAID RECUPERATIVE MEANS, PASSING A MINOR PROPORTION OF SAID FIRST NAMED COLD CLEAN GAS THROUGH SAID RECUPERATIVE MEANS DURING THEIR CHILLING CYCLE TO WARM SAID MINOR PROPORTION OF COLD CLEAN GAS, PASSING A MINOR PROPORTION OF SAID CLEAN GAS SO WARMED THROUGH SAID RECUPERATIVE MEANS DURING SAID CLEANING CYCLE TO REMOVE SAID DEPOSITS, MIXING THE REMAINING PORTION OF SAID WARMED CLEAN GAS WITH A SECOND MINOR PROPORTION OF SAID FIRST NAMED COLD CLEAN GAS, SUBJECTING THE MIXTURE SO OBTAINED TO WORK EXPANSION TO PROVIDE REFRIGERATION AND UTILIZING SAID REFRIGERATION IN SAID PROCESS.

Claim 2

THE METHOD OF SEPARATING GAS MIXTURES BY LIQUEFACTION AND FRACTIONATION WHICH COMPRISES CHARGING THE MAJOR PROPORTION OF A GAS MIXTURE TO BE SEPARATED AT A SUPER-ATMOSPHERIC PRESSURE TO CHILLING AND PURIFICATION MEANS TO PRODUCE COLD CLEAN GAS, CHILLING AND PURIFYING A MINOR PROPORTION OF SAID GAS MIXTURE IN EQUIPMENT SEPARATE FROM SAID MEANS AT SUBSTANTIALLY SAID SUPER-ATMOSPHERIC PRESSURE SO AS TO COOL SAID MINOR PROPORTION AND REMOVE AT LEAST THE MAJOR PROPORTION OF ITS SOLIDIFYING CONSTITUENTS, SAID SEPARATE EQUIPMENT COMPRISING HEAT EXCHARGE MEANS OPERATING BY THE RECUPERATIVE PRINCIPLE IN CHILLING CYCLES AND CYCLES SERVING THE EVAPORATION OF SOLIDIFIED GAS MIXTURE CONSTITUENTS DEPOSITED IN SAID RECUPERATIVE MEANS, PASSING A MINOR PROPORTION OF SAID FIRST NAMED COLD CLEAN GAS THROUGH SAID RECUPERATIVE MEANS DURING THEIR CHILLING CYCLE TO WARM SAID MINOR PROPORTION OF COLD CLEAN GAS, PASSING A MINOR PROPORTION OF SAID CLEAN GAS SO WARMED THROUGH SAID RECUPERATIVE MEANS DURING SAID CLEANING CYCLE TO REMOVE SAID DEPOSITS, MIXING THE REMAINING PORTION OF SAID WARMED CLEAN GAS WITH A SECOND MINOR PROPORTION OF SAID FIRST NAMED COLD CLEAN GAS, SUBJECTING THE MIXTURE SO OBTAINED TO WORK EXPANSION TO PROVIDE REFRIGERATION AND UTILIZING SAID REFRIGERATION IN SAID PROCESS.