Method and device for the removal of metal carbonyls from a gas mixture

Abstract

The invention relates to a process for removal of metal carbonyl from a gas mixture. The gas mixture is subjected to a gas scrubbing in an absorber with methanol as the physical scrubbing liquid to obtain the laden methanol. The metals of the metal carbonyls are at least partially precipitated from the laden methanol as metal sulfides to obtain a first suspension comprising metal sulfides and at least a proportion of the laden methanol. The first suspension is sent to a treatment vessel and therein brought into direct contact with water vapor in countercurrent to obtain a second suspension comprising at least water, methanol and metal sulfides and a gaseous product. The second suspension and the gaseous product are withdrawn from the treatment vessel as separate streams. The invention further relates to an apparatus for performing the process according to the invention and to the use of the process according to the invention or of the apparatus in a gas scrubbing process with methanolas the scrubbing liquid.

Description

[0001] Technical field of invention [0002] The present invention relates to a gas scrubbing method for removing metal carbonyl from a gas mixture, wherein the metal carbonyl is at least partially precipitated from loaded methanol as a metal sulfide. The invention further relates to equipment for carrying out this method and to the use of the method or equipment in a gas scrubbing process using methanol as a scrubbing liquid. Background technique [0003] Methods for removing undesirable companion organisms from industrial crude gas by physical or chemical absorption are well known from the prior art. Therefore, such methods can be used to remove unwanted acidic components (such as carbon dioxide (CO) from the crude synthesis gas produced by gasification or reforming of carbon-containing input materials). 2 ) And hydrogen sulfide (H 2 S)), and also from the desired synthesis gas components such as hydrogen (H 2 ) And carbon monoxide (CO) to remove carbonyl sulfide (COS) and hydrog...

AI Technical Summary

Problems solved by technology

[0010] However, the treatment methods of sulphide slurries known in the prior art have the disadvantage that, from the sulphide slurries, vapor scrubbing media are generated using indirect heat exchangers

Since the indirect heat exchangers used are usually tube-bundle heat exchangers with a large number of internal parts (tube-bundle tubes, baffles), clogging in the internal parts of tube-bundle heat exchangers can easily occur due to attached sulfides

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