Patent ID: 6825390
Filing Date: 2004-11-30
Classification: A01N,C07C

Abstract:
A process of preparing propargyl bromide, which process comprises reacting in a reaction zone phosphorus tribromide and propargyl alcohol in an inert liquid azeotropic solvent that forms an azeotrope with propargyl bromide, to form a reaction mass containing propargyl bromide and said azeotropic solvent, and separating a mixture consisting essentially of propargyl bromide and said azeotropic solvent from the reaction mass, whereby a stabilizing amount of said azeotropic solvent is present with the propargyl bromide both in the liquid state and in the vapor phase (i) during the time the propargyl bromide is being formed and (ii) during and after the time propargyl bromide is being separated from the reaction mass.