摘要 |
PURPOSE:To obtain the titled compound in improved purity, yield of zinc salt and operatability during production, by carrying out reaction of a salicylic acid derivative, etc., with a zinc compound in a mixture of water with a specific organic solvent. CONSTITUTION:In carrying out reaction of a salicylic acid derivative and/or alkali metal salt thereof [example; 3,5-di-(alpha-methylbenzyl)salicylic acid] with a zinc compound (example; zinc sulfate), the reaction is carried out in a mixture of water with an organic solvent which solubility to water is <=0.1 and which solubility for said zinc salt is >=10 (example: toluene, xylene or chlorobenzene). |