Low temperature separation of gaseous mixture for methanol synthesis
AssigneeLinde Aktiengesellschaft
InventorsWolfgang Foerg, Walter Scholz, Freimut Marold
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Abstract
For the low-temperature separation of a gaseous mixture containing essentially hydrogen, C.sub.1+ -hydrocarbons, and carbon monoxide, resulting in a purified gaseous mixture to be processed, after the low-temperature separation, in methanol synthesis, the gaseous mixture is cooled and subsequently fed to a scrubbing column to scrub out the C.sub.1+ -hydrocarbons with liquid CO. A product containing essentially hydrogen and carbon monoxide is obtained at the head of the scrubbing column. The resultant liquid CO, loaded essentially with the C.sub.1+ -hydrocarbons, is withdrawn as the sump product from the column and introduced into a C.sub.1+ -CO separating column.
Claims14
A process for the separation of a gaseous mixture, containing essentially hydrogen, C.sub.1+ -hydrocarbons, and carbon monoxide, at low temperatures, into a gas depleted in C.sub.1+ -hydrocarbons and useful for further processing in methanol synthesis, said process comprising scrubbing the gaseous mixture with liquid CO in a scrubbing column to scrub out the C.sub.1+ -hydrocarbons to form a head product which contains essentially hydrogen and carbon monoxide;
- withdrawing the liquid CO, containing C.sub.1+ -hydrocarbons, as a sump product from the column, and passing said sump product into a C.sub.1+ -CO separating column to remove the CO as gaseous head product.
Dependencies are inferred from the claim text.