乙酸肉桂酯的合成.ppt

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Synthesis of cinnamyl acetate（乙酸肉桂酯）by
solid–liquid phase transfer catalysis: Kinetic study
with a batch reactor
Catalysis Communications 10 (2009) 1638–1642
化学与化学工程学院
陈小玲
Introduction
Experimental
Results ＆discussion
Conclusions
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01
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02
Contents

L-L PTC
It involves the reaction of anionic reactant from aqueous phase with the reactant in organic
phase by a phase
transfer catalyst
S-L TPC
It involves the reaction between the solid nucleophile with the other reactant in the organic liquid phase
PTC
phase transfer
catalysis

L-L PTC
eliminates the need of using aqueous phase thus eliminates the separation problems and easy recovery of the catalyst
enhances the product
selectivity by avoiding the side reactions
lower selectivityand other side reactions
synthesis of fine and specialty chemicals
separation and purifying the final product
Compared with L-L PTC and L-S PTC
L-S PTC
the carboxylic acids shows less reactivity
‘‘omega phase” enhance the
solubilization of the solid and
formationof the catalytic intermediate

we focus our efforts on studying the kinetics and
factors affecting the synthesis of cinnamyl acetate
（乙酸肉桂酯） from cinnamyl bromide （肉桂酸溴）
and sodium acetate（乙酸钠）by S–L PTC.





sodium acetate
( mol)，cinnamyl
bromide( mol)，
n-dodecane
add chlorobenzene
to 50 mL and the
temperature was
raised to 90°C with
constant stirring
Product
add a required
amount of phase
transfer catalyst
when the temperature
reached 90°C
At preset times,the
stirrer was turne off
temporarily, ml
of organic solution
was pipetted out
analyzed on a gas
chromatograph
using SE-30
Column.
＆discussion
7 factors
type of catalyst
speed of agitation
reaction temperature
water addition
size of sodium acetate
catalyst loading
concentration of reactant
In order to optimize the reaction conditions, the esterification reaction was carried out by varying factors as follow:
＆ discussion
Effect of agitation speed
The interfacial mass transfer resistance between the solid surface and organic
phase is negligible when the agitation speed is above 600 rpm.
In this context, agitation speed was fixed at 600 rpm for all furtherexperiments.
＆ discussion
Effect of alkyl chain length of the catalyst
Hence TBAB is chosen as
the phase transfer catalyst
in the following studies.
1
2