Patent ID: 9480958
Filing Date: 2016-11-01
CPC Classification: B01J,C01B

Claim Text:
1. An apparatus for the production of phosgene by reaction of chlorine and carbon monoxide in the presence of a fixed-bed catalyst, comprising a) a tube bundle arranged inside a reactor shell and having a plurality of reaction tubes which are arranged substantially parallel to one another and extend from a bottom tube plate to a top tube plate, and b) a coolant chamber for a cooling fluid, which coolant chamber surrounds the reaction tubes and is delimited by the bottom tube plate, the top tube plate and the reactor shell, wherein the tube bundle is enclosed by an annulus plate which defines an inner annulus for passage of the cooling fluid and which is at a distance from both the bottom tube plate and the top tube plate, wherein there is formed between the annulus plate and the reactor shell an outer annulus for passage of liquid cooling fluid, which outer annulus is in flow communication with the inner annulus, wherein at least one down tube for passage of liquid cooling fluid is arranged inside the tube bundle.