申请人:Institute Of Chemical Industry Of Forest Products,
Chinese Academy Of Forestry
公开号:EP2410030A1
公开(公告)日:2012-01-25
Preparation method of pimaric acid type resin acid includes the following steps: (1) adding refined resin acid, turpentine or rosin and maleic anhydride at a mass ratio of 1 :0.3-1.5 into a reaction bottle, dissolving them in C1∼C10 lower fatty acid solvent, the mass ratio of the C1∼C10 low fatty acid to refined resin acid is 0.05-30: 1, then carrying out addition reaction by heating directly or with assistance of microwave, subsequently cooling, crystallizing, filtering, and washing, and (2) combining the filtrates collected in step (1), stripping of the solvent by vacuum distillation to obtain pimaric acid type resin acid coarse product, dissolving the resulting coarse product in NaOH aqueous solution to prepare aqueous solution of pimaric acid type resin acid salt, adjusting pH to 6-14 with a mineral acid or an organic acid under stirring, and directly purifying or acidifying followed by purifying the resulting precipitation to obtain the final product. The method has the characteristics of high yield, high product content, low cost, and low environmental pollution.
制备蒎烷酸型树脂酸的方法包括以下步骤:(1)将精制树脂酸、松节油或松香、马来酸酐按质量比1:0.3-1.5加入反应瓶中,溶解于C1∼C10低级脂肪酸溶剂中,C1∼C10低级脂肪酸与精制树脂酸的质量比为0.05-30:(2)将步骤(1)中收集的滤液合并,用真空蒸馏法脱除溶剂,得到吡马酸型树脂酸粗品、将所得粗品溶解于 NaOH 水溶液中,制备吡马酸型树脂酸盐水溶液,在搅拌下用矿物酸或有机酸调节 pH 值至 6-14,直接纯化或先酸化后纯化所得沉淀,得到最终产品。该方法具有收率高、产品含量高、成本低、环境污染小等特点。