Patent ID: 9169178
Filing Date: 2015-10-27
Classification: A01N,C07C

Abstract:
1. A method for preparing a stable propargyl bromide (PB) composition, comprising i) combining propargyl alcohol (PA), an amine additive, and an alkylhalogenide (AH) source selected from halogenated paraffins and aliphatic alcohols, whereby obtaining a liquid mixture; ii) adding phosphorus tribromide (PBr3) to the mixture of step i) whereby obtaining a reaction mixture; iii) stirring said reaction mixture of step ii) and allowing said PBr3 to react at least with said PA, whereby obtaining a mixture containing raw PB and AH; and iv) washing the mixture of step iii) and distilling it at lowered pressure, wherein the steps of washing and distilling may be performed in any order, wherein said washing comprises separating organic phase and discarding water phase; thereby obtaining a stable composition containing propargyl bromide and alkylhalogenide.