Reference electrode for ph meters

Claim 1

A REFERENCE HALF-CELL COMPRISING A TUBULAR VESSEL HAVING A CAPILLARY OPENING AT ONE END FOR FLOW OF LIQUID THERETHROUGH, A REFERENCE ELECTRODE SUPPORTED IN SAID VESSEL, AND AN ELECTROLYTE LIQUID DISPOSED IN SAID VESSEL IN CONTACT BETWEEN SAID OPENING AND SAID REFERENCE ELECTRODE, SAID ELECTROLYTE LIQUID CONSISTING OF WATER, POTASSIUM CHLORIDE, AND A NON-IONIZING SOLUBLE ORGANIC COMPOUND ADMIXED THEREWITH IN AMOUNT SUFFICIENT TO DEPASS THE FREEZING POINT OF SAID ELECTROLYTE BELOW -10.7*C., SAID COMPOUND BEING SELECTED FROM THE CLASS OF SUBSTANCES CONSISTING OF GLYCEROL, ETHYLENE GLYCOL, DIETHYLENE GLYCOL, MAINTAINED AT A TEMPERATURE NOT SUBSTANTIALLY ABOVE ABOUT 500*F., IN SAID FIRST SEPARATION ZONE SEPARATING THE FIRST PRODUCT EFFUENT AND RECOVERING THEREFROM A FIRST HYDROGEN-RICH GASEOUS STREAM AND A FIRST LIQUID HYDROCARBON PRODUCT STREAM, PASSING THE THUS SEPARATED HYDROGEN:RICH GASEOUS MATERIAL WITH A SECOND HYDROCARBON FEED MATERIAL IN CONTACT WITH A DESULFURIZATION CATALYST IN A SECOND DESULFURIZATION ZONE MAINTAINED UNDER ELEVATED TEMPERATURE AND PRESSURE CONDITIONS, RECOVERING A SECOND PRODUCT EFFLUENT FROM SAID SECOND DESULFURIZATION ZONE, COOLING SAID SECOND PRODUCT EFFLUENT AND SEPARARATING INTO A SECOND HYDROGEN-RICH GASEOUS STREAM A SECOND LIQUID HYDROCARBON PRODUCT STREAM, RECOVERING AND TREATING SAID SECOND HYDROGEN-RICH GASEOUS STREAM TO REMOVE HYDROGEN SULFIDE THEREFROM AND RECYCLING A PORTION OF THE THUS TREATED SECOND HYDROGEN-RICH GASEOUS STREAM TO EACH OF SAID DESULFURIZATION ZONES, PASSING ANOTHER PORTION OF SAID TREATED SECOND HYDROGEN-RICH GASEOUS STREAM WITH SAID FIRST LIQUID HYDROCARBON PRODUCT STREAM TO AN ADDITIONAL SEPARATION ZONE TO RECCOVER A RELATIVELY LOW-BOILING HYDROCARBON FRACTION FROM A THIRD LIQUID HYDROCARBON PRODUCT, RECOVERING SAID THIRD LIQUID HYDROCARBON PRODUCT AND PASSING THE THUS RECOVERED RELATIVELY LOW-BOILING HYDROCARBON FRACTION TO SAID SECOND DESULFURIZATION ZONE.