申请人:Politechnika Warszawska
公开号:US20170362168A1
公开(公告)日:2017-12-21
Method for preparation of 5-alkylsalicylaldoximes with formula 1, where R is a C6-C16 alkyl group, consisting in that into a water-alcohol solvent system, p-alkylphenol, sodium hydroxide, chloroform and hydroxylamine are introduced, while in relation to the alkylphenol used, sodium hydroxide and chloroform are used in amounts from the stoichiometric amount to a 100% excess, and hydroxylamine is used in amounts from the stoichiometric amount to a 60% excess, and the reaction is carried out at a temperature of 60-75° C. for 1.5-4 h, and then, at a temperature of 20-30° C., the post-reaction mixture is acidified till the pH of the aqueous phase <7.0 is obtained, and next, an alcohol-water azeotrope is distilled off with an admixture of unreacted chloroform, the residue is mixed with a neutral C5-C10 hydrocarbon solvent, the layers are separated, and the solvent is distilled off from the organic phase.
制备化学式为1的5-烷基水杨醛肟的方法,其中R为C6-C16烷基基团,包括以下步骤:在水-醇溶剂体系中引入对烷基酚、氢氧化钠、氯仿和羟肟,相对于所使用的烷基酚,氢氧化钠和氯仿的用量为化学计量量至100%过量,羟肟的用量为化学计量量至60%过量,反应在60-75℃下进行1.5-4小时,然后在20-30℃下,酸化后反应混合物直到水相的pH<7.0,接下来,用未反应的氯仿混合物蒸馏出醇-水共沸物,残留物与中性的C5-C10烃溶剂混合,分离层,在从有机相中蒸馏掉溶剂。