Research on the Process of Removing Ortho(para)Chlorobenzyl Alcohol in Ortho(para)Chlorobenzaldehyde Products
Tn order to remove the impurity ortho(para)chlorobenzyl alcohol in ortho(para)chlorobenzaldehyde synthesized by chlorination hy-drolysis process,ortho(para)chlorobenzyl alcohol,an impurity in ortho(para)chlorobenzaldehyde product,was converted into ortho(para)chlorobenzyl chloride using Lucas reagent.Then,in the alkaline hydrolysis process,catalyst triethylamine was added to convert ortho(para)chlorobenzyl chloride complex to water-soluble quaternary ammonium salt.The product ortho(para)chlorobenzaldehyde was refined and puri-fied by oil-water separation and vacuum distillation.Controlling the content of impurity para chlorobenzyl alcohol in para chlorobenzaldehyde products to be less than 0.20％,in order to improve the quality of para chlorobenzaldehyde products(main content ≥ 99.5％).
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维普
