Preparation method of imidazoline

Preparation method of imidazoline

  • CN 105,585,530 B
  • Filed: 10/21/2014
  • Issued: 05/19/2020
  • Est. Priority Date: 10/21/2014
  • Status: Active Grant
First Claim
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1. A method for preparing imidazoline, which comprises the following steps:

  • (1) contacting an organic acid and a polyamine in the presence of diphenyl ether under amidation reaction conditions, wherein the organic acid is a C6-C20 fatty acid and/or a C7-C20 aromatic acid;

    the polyamine is one or more of ethylenediamine, hexamethylenediamine, hydroxyethyl ethylenediamine, diethylenetriamine, triethylene tetramine, tetraethylene pentamine, pentaethylene hexamine, hexaethylene heptamine, heptaethylene octamine, octaethylene nonamine and nonaethylene decamine;

    (2) performing ring closing dehydration condensation on an amide product in the material obtained by contact;

    wherein the amount of diphenyl ether is 40-60 wt% of the total liquid phase.

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