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US 9,169,178 B2Granted
Manufacturing of stabilized propargyl bromide
AssigneeBromine Compounds Ltd.
InventorJakob Oren
Life of this patent
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Abstract
This invention provides a process for obtaining propargyl bromide in high yield from propargyl alcohol and phosphorus bromide, in the form of a stable composition with alkylbromide.
Claims18
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.
3 more elements
Dependencies are inferred from the claim text.