Device and method for producing phosgene

摘要

The invention relates to a device (R) for producing phosgene by reacting chlorine and carbon monoxide in the presence of a fixed-bed catalyst, comprising a) a tube bundle, which is arranged inside a reactor jacket (4) and which has a plurality of reaction tubes (3), which are arranged substantially parallel to each other and which extend from a lower tube sheet (2) to an upper tube sheet (2), and b) a coolant space for a cooling fluid, which coolant space surrounds the reaction tubes (3) and is defined by the lower tube sheet (1), the upper tube sheet (2), and the reactor jacket (4), wherein the device is characterized in that the tube bundle is enclosed by an annular-space sheet (7), which defines an inner annular space (12) for the passage of the cooling fluid and which is arranged at a distance from both the lower tube sheet (1) and the upper tube sheet (2), wherein an outer annular space (13) for feeding liquid cooling fluid through is formed between the annular-space sheet (7) and the reactor jacket (4), which outer annular space is in fluid connection with the inner annular space (12). The invention further relates to a method for producing phosgene by means of such a device.

主权项

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.