Devices for the production of cyanopyridines

摘要

Subject of the invention is a method for the production of a cyanopyridine, wherein
(A) a gaseous reaction product comprising the cyanopyridine is produced in a reactor,(B) the gaseous reaction product is quenched with water in a column (2) and a gaseous phase is obtained, which is depleted from at least a portion of the cyanopyridine,(C) the gaseous phase is transferred to a condenser, in which a condensate is obtained, and the gaseous phase is depleted from at least a portion of the water, and(D) the gaseous phase from the condenser is passed through at least one heat exchanger.

Another subject of the invention is a device for carrying out the invention.

主权项

1. A device for the production of a cyanopyridine, comprising:
(i) a reactor for producing a gaseous reaction product comprising a cyanopyridine, (ii) a column for quenching the gaseous reaction product with water, such that a gaseous phase having a temperature of from about 40 to about 90° C. is obtained, which is depleted from at least a portion of the cyanopyridine, wherein the column comprises:
an absorber section and a stripping section, the absorber section being positioned above the stripping section, such that liquid which passed the absorber section enters the stripping section,means for feeding the gaseous reaction product comprising the cyanopyridine into the column,the absorber section being adapted for contacting the gaseous phase with an aqueous solution, such that at least a portion of the cyanopyridine is dissolved in the aqueous solution, the stripping section being adapted for stripping the aqueous solution obtained from the absorber section with a stripping gas, and means at the bottom of the column for eluting the aqueous solution, (iii) a condenser for depleting the gaseous phase obtained from the column from at least a portion of the water, in which a condensate is obtained, wherein the column and the condenser are separate vessels, and (iv) at least one heat exchanger, through which the gaseous phase obtained from the condenser is passed and heated.