Ethoxylated dodecyl alcohol acetate or propionate and its prepn process
A technology of polyoxyethylene lauryl ether and polyoxyethylene ether propionate, applied in the preparation of carboxylic acid halides, organic chemistry, etc., can solve problems such as environmental hazards, waste of resources, and energy, and achieve a wide range of applications and reserves Rich, superior wettability effect
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[0039]As shown in Figure 1, a kind of polyoxyethylene lauryl ether acetate or propionate and preparation method comprise the following steps; During the process, the temperature in the flask was raised to 50-55°C, and the heating was stopped. Then slowly add acetyl chloride or propionyl chloride dropwise into the round bottom flask. After the dropwise addition, the temperature in the flask rises by 4-5°C, and then the temperature in the flask rises to 85-90°C, react for 3 hours, stop the reaction, and cool to room temperature, stand still. Then add chloroform, then add 5% sodium carbonate solution to wash twice, extract and separate, dry, and then characterize lauryl alcohol polyoxyethylene ether acetate or propionate.
[0040] The main content of this method is as follows:
[0041] (1) Selection of raw material ratio;
[0042] At first because this reaction itself is an esterification reaction, and this reaction is a reversible reaction, in order to make the reaction carry...
Embodiment 1
[0047] Put the measured 1mmol of polyoxyethylene lauryl ether (n=9) into a 50ml round bottom flask and heat it; the measured 1.00mmol of acetyl chloride or propionyl chloride is added to the constant pressure dropping funnel; when the reaction temperature in the flask rises After reaching 50-55°C, stop heating, start stirring and slowly add acetyl chloride or propionyl chloride dropwise; after dropwise addition of acid chloride, raise the heating temperature to 85-90°C for 3-4 hours, then stop stirring.
Embodiment 2
[0049] Put the measured 1mmol of polyoxyethylene lauryl ether (n=9) into a 50ml round-bottomed flask and heat it; the measured 1.20mmol of acetyl chloride or propionyl chloride is added to the constant pressure dropping funnel; when the reaction temperature in the flask rises After reaching 50-55°C, stop heating, start stirring and slowly add acetyl chloride or propionyl chloride dropwise; after dropwise addition of acid chloride, raise the heating temperature to 85-90°C for 3-4 hours, then stop stirring.
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