propionic anhydride

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propionic anhydride

[¦prō·pē¦än·ik an′hī‚drīd]
(organic chemistry)
(CH3CH2CO)2O A colorless liquid with a boiling point of 167-169°C; soluble in ether, alcohol, and chloroform; used as an esterifying agent and for dyestuffs and pharmaceuticals.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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The experiment first investigated the effect of propanoic acid catalytic chlorine (see Figure 1) in the condition of 15 ml propanoic acid, 5 ml propanoic anhydride, 130[degrees]C reaction temperature, and 40 ml/min chlorine flow rate with micro excess.
In order to verify the catalytic principle, 0.4 ml concentrated sulfuric acid was added to propanoic anhydride catalytic chlorination to observe the effect of the chlorination reaction, compared with the control experiment.
First, propanoic anhydride conducted initiation (Scheme 1; see (2)) and formed propanoyl chloride.
Mechanism of Chlorination Process: From Propanoic Acid to [alpha]-Chloropropanoic Acid and Byproducts Using Propanoic Anhydride as Catalyst

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