Synthesis of urea

Claim 1

A METHOD OF SYNTHESIZING UREA COMPRISING COMPRESSING A GAS CONTAINING CO2, N2, ''I AND CO TO A PRESSURE OF AT LEAST 150 KG./CM.2, WASHINGT SAD GAS WITH A MIXTURE OF AMMONIA AND AN AQUEOUS SOLUTUION CONTAINING AMMONIA AND UREA, TO ABSORB IN SAID MIXTURE THE CO2 CONTAINED IN SAID GAS THEREBY FORMING AN ABSORBATE, REACTING THE CO2 AND NH3 CONTAINED IN SAID ABSORBATE TO FORM UREA AND WATER MIXED WITH UNREACTED CO2 AND NH3, RECOVERING A PORTION OF SAID UREA AND LEAVING THE REMAINING UREA DISSOLVED IN SAID WATER AS AN AQUEOUS UREA SOLUTION, RECYCLING A PORTION OF SAID AQUEOUS UREA SOLUTION TO SAID WASHING STEP, DISSOLVING SAID UNREACTED CO2 AND NH3 IN THE REMAINING PORTION OF SAID AQUEOUS UREA SOLUTION AND ADDING THE RESULTING SOLUTION CONTAINING SAID UNREACTING CO2 AND NH3 AND SAID REMAINING PORTION OF SAID AQUEOUS UREA SOLUTION TO SAID ABSORBATE PRIOR TO SAID REACTING TEP, REMOVING CO FROM SAID GAS AFTER REMOVAL OF SAID CO2 BY SAID WASHING STEP, THEREAFTER REACTING N2 AND H2 CONTAINED IN SAID GAS TO FORM AMMONIA, AND RECYCLING SAID FORMED AMMONIA TO SAID WASHING STEP.