Recovery of CO2 in a Process for the Synthesis of Methanol

摘要

A process for producing methanol, where a hydrocarbon feedstock (1) is reformed and a make-up syngas is reacted in a synthesis loop, obtaining crude methanol which is further treated to obtain high-grade methanol, and where the carbon dioxide dissolved in the crude methanol is recycled to the reforming section in order to adjust the stoichiometric number of the make-up syngas. In a preferred embodiment, a flash gas (9) separated from the crude methanol (8) and light ends (10) coming from distillation are recycled to a compressor (106) and fed to a primary reformer (100); further carbon dioxide can be recycled from the flue gas (11).

主权项

1. A process for producing methanol, comprising the steps of:
a. reforming a hydrocarbon feedstock in a reforming process step, obtaining a make-up syngas comprising carbon oxides and hydrogen; b. reacting said make-up syngas in a methanol synthesis loop, obtaining crude methanol; c. processing said crude methanol to obtain methanol of a required purity; d. recovering at least one CO2-rich stream from the processing of said crude methanol, and e. recycling said at least one CO2-rich stream as an input stream for said reforming process step.