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1. (WO2017157530) METHANOL SYNTHESIS FROM SYNTHESIS GASES WITH HYDROGEN DEFICIENCY

Pub. No.:    WO/2017/157530    International Application No.:    PCT/EP2017/025036
Publication Date: Fri Sep 22 01:59:59 CEST 2017 International Filing Date: Tue Mar 07 00:59:59 CET 2017
IPC: C07C 29/151
Applicants: L'AIR LIQUIDE SOCIÉTÉ ANONYME POUR L'ETUDE ET L' EXPLOITATION DES PROCÉDÉS GEORGES CLAUDE
Inventors: KOPETSCH, Hans
GRONEMANN, Veronika
OELMANN, Tobias
Title: METHANOL SYNTHESIS FROM SYNTHESIS GASES WITH HYDROGEN DEFICIENCY
Abstract:
The invention relates to a process and a plant for the methanol synthesis, in particular for the methanol synthesis from a synthesis gas which has a hydrogen deficiency. According to the invention, a purge gas stream therefor is branched off from the synthesis gas circuit of the methanol synthesis, liberated from methanol traces in a washing device, and then treated in a hydrogen separation device which comprises a membrane separation stage and a pressure swing adsorption stage. Depending on the application and magnitude of the hydrogen deficit the membrane separation stage and the pressure swing adsorption stage can be connected in series or in parallel.