Preparation of urea in combination with the synthesis of ammonia

Abstract

Abstract A PROCESS FOR THE MANUFACTURE OF UREA FROM AMMONIA AND CARBON DIOXIDE IS DESCRIBED WHEREIN A TECHNIQUE FOR REDUCING THE AMOUNT OF INERT GASES SUPPLIED TO UREA REACTOR IS UTILIZED. THIS TECHNIQUE INVOLVES FIRST ABSORBING THE AMMONIA FROM THE AMMONIA SYNTHESIS GAS MIXTURE (CONTAINING AMMONIA, HYDROGEN AND NITROGEN) IN A SUITABLE SOLVENT (WATER, OR AN AQUEOUS SOLUTION IN WHICH AMMONIA IS READILY ABSORBED), AND THEREAFTER DESORBING THE AMMONIA IS READILY ABSORBED), AND THEREAFTER DESORBING THE AMMONIA CONTENT OF THE ABSORBENT SOLUTION IN A SUITABLE GAS STREAM, THE DESORPTION BEING CONDUCTED IN SUCH A WAY THAT THE AMMONIA CONTENT OF THE DESORBED GAS MIXTURE IS MAINTAINED SUFFICIENTLY HIGH THAT A RELATIVELY MUCH SMALLER VOLUME OF INERT GASES ARE THEREBY INTRODUCED INTO THE UREA SYNTHESIS REACTOR.

Inventors

• 👤 Petrus J C Kaasenbrood
• 👤 Gerardus J J M Taks

Bibliographic Details