2 Experimental part
2.1 Experimental reagents and sources
Acetone industrial first-class product imports; liquid chlorine Ningbo Electrochemical Plant purity ≥99.5.
2.2 Experimental operation
After preheating and vaporizing, monochloroacetone is sent to the tubular reactor in a certain proportion with chlorine for reaction. The reaction product is quickly condensed with chilled water and cooled to stop the deep chlorination of acetone. Collect the reaction liquid and distill to recover unreacted acetone Collect the fractions from 118 to 119.C, and analyze the purity of the product by gas chromatography. The by-product Hcl of the reaction is absorbed by water spray, and the by-product hydrochloric acid.
3 Results and discussion
3.1 Determination of the reaction phase
 Whether the reaction between monochloroacetone and chlorine is carried out in a gas-liquid reaction or a gas-gas reaction, it is necessary to consider the reaction result, process control, process amplification and many other factors. When liquid acetone reacts with chlorine gas, it can also quickly form a Chloroacetone, but the uneven distribution of the gas-liquid two-phase, causes a large excess of chlorine in local areas, resulting in an increase in dichloride products. The solubility of chlorine in acetone is very small, and it passes through liquid acetone in the form of bubbles, with low utilization and low reaction yield. ]. During the amplification process, with the increase of pipe diameter and pipe length, the uneven distribution of gas and liquid phases becomes more prominent, and the reaction results vary greatly.