Process for the preparation of 3 - pentenonitrilo by hidrocianuracion 1,3-butadiene and methods to control the content of hydrocyanic acid in streams containing the latter and 1,3-butadiene.

摘要

Process for the preparation of 3 - pentenonitrilo by hidrocianuracion 1,3-butadiene in the presence of at least one Catalyst, wherein 1,3-butadiene hidrocianurado is not removed from the discharge of hidrocianuracion and Recycling the procedure, determining the conten Gone of hydrocyanic acid in the stream of 1,3-butadiene recycled.Claim 1: use at least a method selected from the Group,That includes: (1) infrared Spectrometry in the first Zone of the Infrared transmission in Liquid Phase; (2) infrared spectroscopy in the mid infrared and / or in the gas phase, The Liquid Phase Transmission; (3) infrared spectroscopy in the mid Infrared L A Liquid phase in the ATR Measurement process; (4) measurement of the density in the liquid phaseWhich is based on the difference of the densities of hydrocyanic acid and 1,3 - butadiene; (5) measuring thermal conductivity; (6) to measure the speed of Sound; (7) to measure the Dielectric permittivity; (8) as the index of refraction; (9) Gas chromatographic determination of online; (10) to measure the heat capacity of the liquid Phase; Taking Photo 11) As online and titracion as hydrocyanic acid vollhardt or according to LiebigTo control the content of hydrocyanic acid in streams containing 1,3-butadiene and hydrocyanic acid.