| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to an improved method of obtaining monochloracetic acid (MCA) and can be used in chemical industry. MCA is an essential product in production of carboxymethyl cellulose, various pesticides and medicinal agents. The method involves a step for chlorinating acetic acid with molecular chlorine in a bubbling reactor in the presence of a homogeneous catalyst, hydrogenolysis of chlorination products in the presence of a fixed-bed catalyst based on palladium and extraction of the end product through rectification under vacuum, where the hydrogenolysis step is carried out in film mode with direct-flow movement of liquid and gas. ^ EFFECT: lower consumption indices of raw material, higher quality of the obtained MCA and increased amount of recycled material. ^ 4 cl, 1 dwg, 1 tbl, 5 ex |
