Preparation and separating tower device for chloroacetic acid

Abstract

The invention discloses a preparation and separating tower device for chloroacetic acid, which comprises an outer shell, wherein the bottom part of the outer wall at one side of the outer shell is welded with a first supporting platform, and the outer wall of the top end of the first supporting platform is fixed with a fan through a screw; the outer wall of one side of the outer shell far from the first supporting platform is welded with a first supporting platform and a second supporting platform, and the outer wall of the top end of the second supporting platform is fixed with a purifying box through the screw; a duct is plugged at the outer wall of one side of the purifying box closing to the outer shell, and one end of the duct far from the purifying box is plugged on the inner wall of the outer shell. According to the preparation and separating tower device for chloroacetic acid, an unloading door is opened automatically by a hydraulic cylinder, so that the labor force is saved, the working efficiency is improved, and the risk of human body safety by the high toxicity of chloroacetic acid can be avoided; an air quality sensor monitors the quality of gas emission so as to avoid the air pollution in the preparation process; the completely purified gas can be recycled through a recycling pipe, so the energy-saving and environmental protection effects are good; moreover, oil fluid in the reaction can be recycled through an oil outlet pipe, thus the resource is saved and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of preparation and separation of chemical raw materials, in particular to a separation tower device for the preparation of chloroacetic acid. Background technique [0002] Chloroacetic acid, also known as monochloroacetic acid, is packed in a polypropylene woven bag lined with a double-layer plastic bag. During transportation, it should be protected from direct sunlight, moisture, and packaging damage. During the preparation of chloroacetic acid, it is generally heated to 105 degrees Celsius in an oil bath. During the whole chlorination process, the temperature clock of the oil bath is maintained between 108-112°C, and the reaction will start after a few minutes of chlorine gas introduction, and the yellow color in the acetic acid will fade away immediately, and there will be hydrogen chloride At this time, the rate of chlorine gas introduction can be greatly increased, but as long as there is no yellow chlo...

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Problems solved by technology

[0002] Chloroacetic acid, also known as monochloroacetic acid, is packed in a polypropylene woven bag lined with a double-layer plastic bag. During transportation, it should be protected from direct sunlight, moisture, and packaging damage. During the preparation of chloroacetic acid, it is generally heated to 105 degrees Celsius in an oil bath. During the whole chlorination process, the temperature clock of the oil bath is maintained between 108-112°C, and the reaction will start after a few minutes of chlorine gas introduction, and the yellow color in the acetic acid will fade away immediately, and there will be hydrogen chloride At this time, the rate of chlorine gas introduction can be greatly increased, but as long as there is no yellow chlorine gas in the bottle, the chlorination reaction takes about 10 hours, and the end point of the reaction can be significantly reduced by the released hydrogen chloride, or by the melting point of the sample taken out To determine, when the melting point of the crude chloroacetic acid sample is at 45-50 ° C, stop feeding chlorine gas to complete the preparation, but the preparation process is currently inefficient, and the air pollution is serious, and the waste of resources is large

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