Patent ID: 6333014
Filing Date: 2001-12-25
Classification: B01J,C01B,C07C

Abstract:
Process for the ammonia and methanol co-production in a plant comprising a secondary reformer section, a high-temperature CO conversion section and a low-temperature CO conversion section, arranged in series, an ammonia synthesis section, a methanol synthesis section and a methanol separation section, said process comprising the following steps:taking a portion of a gaseous flow comprising CO, CO.sub.2, H.sub.2 and H.sub.2 O coming from said secondary reformer section;feeding said portion of gaseous flow to a cooling and H.sub.2 O separation section;feeding a remaining portion of said gaseous flow comprising CO, CO.sub.2, H.sub.2 and H.sub.2 O coming from said secondary reforming section to said high-temperature CO conversion section;feeding a gaseous flow comprising CO, CO.sub.2, H.sub.2 and H.sub.2 O coming from said high temperature CO conversion section to said low-temperature CO conversion section;feeding a substantially H.sub.2 O-free gaseous flow coming from said cooling and H.sub.2 O separation section to said methanol synthesis section;reacting said substantially H.sub.2 O-free gaseous flow in said synthesis section for methanol production;feeding a gaseous flow comprising CO, CO.sub.2, H.sub.2 and CH.sub.3 OH coming from said methanol synthesis section to said methanol separation section;separating a fluid flow comprising methanol from a substantially methanol-free gaseous flow comprising CO, CO.sub.2 and H.sub.2 in said methanol separation section;feeding said substantially methanol-free gaseous flow coming from said methanol separation section to said low-temperature CO conversion section;feeding a gaseous flow coming from said low-temperature CO conversion section to said ammonia synthesis section for ammonia production; andfeeding to said substantially methanol-free gaseous flow coming from said methanol separation section a liquid flow comprising H.sub.2 O heated by indirect heat exchange with said portion of gaseous flow coming from said secondary reformer section.