PROCESS AND PLANT FOR THE SYNTHESIS OF METHANOL WITH HYDROGEN RECOVERY FROM SYNTHESIS LOOP PURGE

摘要

Process and plant for the synthesis of methanol with hydrogen recovery from the synthesis loop (1), in which: the synthesis loop operates at the production pressure of the fresh make-up gas (6); a drawing is provided of purge gas (14) from the unreacted recycle gases, said drawing being downstream of the circulation compression section (5) of the synthesis loop (1); the recovery hydrogen (16) is obtained with a low pressure drop system (15), and is recycled directly into the synthesis loop (1) upstream of said compression section.