Method of preventing the depositing of sulfur in the riser pipes in producing natural gases laden with hydrogen sulfide and containing elemental sulfur in solution

Claim 1

IN A METHOD OF PREVENTING THE FORMATION FO SOLID SULFUR IN A STREAM OF NATURAL GAS DURING UPWARD PASSAGE OF THE SAME FROM A SUBTERRANEAN NATURAL GAS DEPOSIT, SAID NATURAL GAS INCLUDING H2S, CO2 AND ELEMENTARY SULFUR AND BEING INITIALLY AT AN ELEVATED PRESSURE, AND TEMPERATURE SUFFICIENTLY HIGH TO MAINTAIN SAID SULFUR IN SOLUTION IN SAID H2S, THE STEP OF INTRODUCING INTO SAID STREAM OF NATURAL GAS DURING UPWARD PASSAGE OF THE SAME, AT A POINT AT WHICH THE PRESSURE AND TEMPERATURE OF SAID NATURAL GAS STREAM ARE STILL SUFFICIENTLY HIGH TO MAINTAIN SAID SULFUR IN SOLUTION IN SAID H2S, AN AQUEOUS SOLUTION OF THE HYDROXIDE OF AT LEAST ONE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS AND AMMONIA SO AS TO FORM AN AQUEOUS SOLUTION OF THE SULFIDE OF SAID SUBSTANCE HAVING SAID SULFUR DISSOLVED THEREIN IN THE FORM OF AN ALKAI METAL OR AMMONIUM POLYSULFIDE.