Patent ID: 9422377
Filing Date: 2016-08-23
CPC Classification: C07C,C08F

Claim Text:
1. A process for producing acrolein, comprising: a glycerin dehydration step of conducting dehydration reaction of glycerin to obtain an acrolein-containing gas; a partial-condensation step of cooling the acrolein-containing gas to condense a part of acrolein, water, and a high-boiling substance selected from the group consisting of phenol, 1-hydroxyacetone, allyl alcohol, acetal and glycerin polycondensation products, contained in the acrolein-containing gas, thereby obtaining a purified gas and a condensate; and a separation step of separating the purified gas from the condensate; wherein a polymerization inhibitor is added to the acrolein-containing gas or the condensate in the partial-condensation step, and the mass ratio of acrolein/(water+hydroxyacetone) in the condensate is 1/99 or more.