| 摘要 |
<p>Subject of the invention is a method for the production of a cyanopyridine, comprising the steps of
(a) providing a column comprising 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,
(b) feeding a gaseous phase comprising the cyanopyridine into the column,
(c) contacting the gaseous phase with an aqueous solution in the absorber section, such that at least a portion of the cyanopyridine is dissolved in the aqueous solution,
(d) stripping the aqueous solution obtained from the absorber section in step (c) with a stripping gas in the stripping section, and
(e) eluting an aqueous solution comprising the cyanopyridine from the bottom of the column. Another subject of the invention is a device for carrying out the invention.</p> |
