146823-76-9Relevant articles and documents
Preparation method for simultaneously synthesizing tetrabromobisphenol A monomethyl ether and dimethyl ether
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Paragraph 0029-0056, (2020/06/05)
The invention relates to a preparation method for simultaneously synthesizing tetrabromobisphenol A monomethyl ether and dimethyl ether. The preparation method comprises the steps: dissolving TBBPA into acetonitrile; deprotonating with sodium hydroxide, adding methyl iodide, heating to perform methylation reaction, cooling in an ice bath after the reaction is finished, dissolving and cleaning withdichloromethane, filtering, dewatering and concentrating to obtain a concentrated solution, and separating and purifying the concentrated solution by adopting medium-pressure preparative chromatography to obtain tetrabromobisphenol A monomethyl ether and tetrabromobisphenol A dimethyl ether simultaneously. Monomethyl ether and dimethyl ether of TBBPA can be obtained at the same time only throughone-step reaction, and especially the high yield of monomethyl ether is guaranteed; meanwhile, the post-treatment steps are simplified, and losses caused by multiple times of extraction in an existingmethod are avoided; the medium-pressure preparative chromatography adopts silica gel column chromatography, is suitable for purification of constant samples, can accurately separate components in theproduct through real-time control, and ensures the purity of the product.