921-03-9Relevant articles and documents
Berezovskii et al.
, (1968)
High-selectivity synthetic method for 1,1,3-trichloroacetone
-
Paragraph 0017; 0018, (2017/04/28)
The invention discloses a high-selectivity synthetic method for 1,1,3-trichloroacetone. The high-selectivity synthetic method includes the specific following steps that (1) 2-hydrocarbyl aniline and acetone are reacted to generate imine, chlorine is led for acetone chlorination, and meanwhile the pH of reaction liquid is kept with a sodium hydroxide solution; (2) after the chlorination reaction is completed, the pH value of the reaction liquid is adjusted by adjusting the adding quantity of the sodium hydroxide solution, imine is decomposed accordingly, 1,1,3-ichloroacetone and 2-alkyl aniline are obtained, filtering is carried out, and generated salt is removed; (3) filtered liquid is subjected to pressure reduction fractional distillation, and concentrated liquid after fractional distillation is the high-concentration-and-purity 1,1,3-trichloroacetone. By means of the high-selectivity synthetic method for the 1,1,3-trichloroacetone, the synthetic selectivity of the 1,1,3-trichloroacetone is effectively improved, the yield of a product is further increased, and the quality of the product is further improved; meanwhile, the device requirements are low, the safety factor is high, and the discharging amount of waste liquid is greatly reduced.
Preparing method for 1,1,3-trichloroacetone
-
Paragraph 0012; 0022, (2017/03/08)
The invention relates to a preparing method for 1,1,3-trichloroacetone. The preparing method comprises the following process steps that firstly, acetone and methyl alcohol serve as raw materials, an intermediate product 1,3-dichloroacetone dimethyl carbinol is obtained through chlorine chlorination preparation, a crude 1,1,3-trichloroacetone product is obtained through methyl alcohol stripping and deep chlorination, and a pure product is obtained through rectification. According to an improvement of the preparing mehtod, 1,3-dichloroacetone dimethyl carbinol easy to separate is prepared firstly from acetone, by-products 1,1-dichloroacetone and 1,1,1-trichloroacetone are separated out, then carbonyl is reduced through the method of introducing chlorine, new substances cannot be introduced, the purity of the end product1,1,3-trichloroacetone is high, and the total yield through the three-step reaction is high.