Lewis acid halide catalysts for preparation of polyamines
AssigneeAir Products and Chemicals, Inc.
InventorsMichael E. Ford, Thomas A. Johnson
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Abstract
A process for selectively preparing predominantly non-cyclic polyalkylene polyamine compounds is disclosed wherein an alkylene polyamine compound is contacted with an alkanolamine compound in the presence of a catalytically effective amount of a Lewis acid halide substance at a temperature of from 200.degree. to 350.degree. C. under a pressure sufficient to maintain the reaction mixture essentially in liquid phase. The polyalkylene polyamine thus formed is recovered from the reaction mixture.
Claims10
A process for preparing a noncyclic polyalkylene polyamine which comprises:
- contacting an alkyleneamine compound having two primary amino groups of the general formula:
- ##STR4## wherein R is hydrogen or a lower alkyl (C.sub.1 -C.sub.4) radical, x is a number from 2 to about 6, and y is a number from 1 to about 4 with an alkanolamine compound having a primary or secondary hydroxyl group of the general formula:
- ##STR5## wherein R' is hydrogen or a lower alkyl (C.sub.1 -C.sub.4) radical, x' is a number from 2 to about 6;
- and y' is a number from 0 to about 3;
- the contacting being performed in the presence of an effective amount of a Lewis acid halide substance which is tin (IV) chloride, zinc chloride or zinc fluoride at a temperature sufficient to effect reaction between the alkyleneamine and the alkanolamine compounds under a pressure sufficient to maintain the reaction mixture essentially in liquid phase.
A process for preparing a linear polyalkylene polyamine which comprises:
- contacting an alkyleneamine compound having two primary amino groups of the general formula:
- ##STR6## wherein R is hydrogen or methyl, x is a number from about 2 to 6, and y is a number from about 1 to 4 with an alkanolamine compound having a primary or secondary hydroxyl group of the general formula:
- ##STR7## wherein R' is hydrogen or methyl, x' is a number from about 2 to 6, and y' is a number from about 0 to 3, and the molar ratio of alkylenediamine to alkanolamine is at least 1:1;
- the contact being performed in the presence of about 0.01 to 10.0 mole percent, based on the total amount of alkylenediamine and alkanolamine present in the reaction mixture, of a Lewis acid halide substance which is tin (IV) chloride, zinc fluoride or zinc chloride at a temperature from about 200.degree. to 350.degree. C. under a pressure sufficient to maintain the reaction mixture essentially in liquid phase.
Dependencies are inferred from the claim text.