Process for preparing alkylamines
AssigneeAlbemarle Corporation
InventorsBonnie G. McKinnie, W. Brian Harrod
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Abstract
This invention relates to an improvement in a process for producing an alkylamine from olefin and amine by hydrohalogenating the olefin to form haloalkane then reacting the haloalkane with amine to form an alkylamine. The improvement comprises heat-treating the alkylamine thus formed with an aqueous alkaline or alkaline earth metal hydroxide at a temperature and for a period of time sufficient to minimize the formation of flocculent precipitate during the formation and/or storage of the alkylamine.
Claims18
In a process for producing alkylamine from olefin by hydrohalogenating said olefin to form haloalkane and reacting said haloalkane with amine to form said alkylamine, the improvement comprising heat-treating said alkylamine in the presence of an aqueous alkaline or alkaline earth metal hydroxide at a temperature and for a period of time sufficient to minimize the formation of flocculent precipitate during storage of said alkylamine.
A method for reducing the potential for forming flocculent precipitate during the manufacture and/or storage of alkylamines, said method comprising heat-treating said alkylamine in the presence of an alkaline or alkaline earth metal hydroxide at a temperature and for a period of time sufficient to minimize the formation of said flocculent precipitate during manufacture and/or storage of said alkylamine.
A process for preparing alkylamine comprising:
- (a) hydrobrominating mixed olefin containing .alpha. and internal olefins in the presence of a free radical catalyst so as to form a mixture of primary and secondary bromoalkanes;
- (b) selectively dehydrobrominating said secondary bromoalkanes and separating said dehydrobrominated secondary bromoalkanes from said primary bromoalkanes;
- (c) Aminating said primary bromoalkanes with amine to form alkylamine hydrobromides;
- (d) neutralizing said alkylamine bromohalides with NaOH to form alkylamine product;
- and
- (e) heat-treating said alkylamine product with an alkaline or alkaline earth metal hydroxide at a temperature and for a period of time sufficient to minimize the formation of flocculent precipitate during storage of said alkylamine product.
Dependencies are inferred from the claim text.