Affiliation:
1. School of Chemistry and Chemical Engineering, South Campus, Shandong University, Jinan, P.R. China
Abstract
A novel betaine type asphalt emulsifier 3-(N,N,N-dimethyl acetoxy ammonium
chloride)-2-hydroxypropyl laurate was synthesized after three steps by the
reaction of lauric acid, epichlorohydrin, dimethylamine and sodium
chloroacetate. The optimum reaction conditions were obtained for the
synthesis of the first step of 3-chloro-2-hydroxypropyl laurate. The
esterification yield reaches 97.1% at the optimum conditions of reaction
temperature 80?C, reaction time 6 h, feedstock mole ratio of epichlorohydrin
to lauric acid 1.5, mass ratio of catalyst to lauric acid 2%. The chemical
structure of the product was characterized by FTIR and 1H NMR. The first
synthesis step of 3-chloro-2-hydroxypropyl laurate was monitored by online
FTIR technique. The by-product was detected by the online FTIR analysis.
Based upon the experimental data, a plausible reaction mechanism was proposed
for the reaction. The CMC of the objective product has a lower value of
7.4?10-4 mol/L. The surface tension at CMC is 30.85 mN/m. The emulsifier is a
rapid-set asphalt emulsifier.
Publisher
National Library of Serbia
Subject
General Chemical Engineering
Cited by
7 articles.
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