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    • 3. 发明授权
    • Preparation method of pimaric acid type resin acid
    • 海松酸型树脂酸的制备方法
    • US08680232B2
    • 2014-03-25
    • US13254774
    • 2010-03-18
    • Zhendong ZhaoYuxiang ChenLiangwu BiYan GuDongmei LiJing WangYanju Lu
    • Zhendong ZhaoYuxiang ChenLiangwu BiYan GuDongmei LiJing WangYanju Lu
    • C09F1/02
    • C07C61/08C07C51/42C07C51/43C07C51/44C07C51/487C07D307/77C07D307/89C09F1/04
    • A method for preparing pimaric acid type resin acids includes the following steps: step (1) adding refined resin acid, turpentine, or rosin along with maleic anhydride at a mass ratio of 1:0.3-1.5 into a reaction bottle, dissolving the ingredients into a 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 additional reaction by heating directly or with assistance of a microwave, subsequently cooling, crystallizing, filtering, and washing; and step (2) combining the filtrates collected in step (1), stripping 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 the pH level to 6-14 with a mineral acid or an organic acid while stirring, and either 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.
    • 制备海松酸型树脂酸的方法包括以下步骤:步骤(1)将精制树脂酸,松节油或松香与马来酸酐以1:0.3-1.5的质量比加入到反应瓶中,将成分溶解成 C1-C10低级脂肪酸溶剂,C1-C10低级脂肪酸与精制树脂酸的质量比为0.05-30:1,然后直接加热或在微波辅助下进行附加反应,随后冷却,结晶 ,过滤和洗涤; 和步骤(2)将步骤(1)中收集的滤液合并,通过真空蒸馏除去溶剂,得到海松酸型树脂酸粗产物,将所得粗产物溶解在NaOH水溶液中,制备海松酸型树脂酸水溶液 盐,在搅拌下用无机酸或有机酸将pH值调节至6-14,直接纯化或酸化,然后纯化,得到沉淀,得到最终产物。 该方法具有产量高,产品含量高,成本低,环境污染少的特点。