乙二胺二邻苯基乙酸钠的合成及其在麦草浆漂白中的应用.docx

乙二胺二邻苯基乙酸钠的合成及其在麦草浆漂白中的应用《纸和造纸》2022年第9期 于兴凯，卫杰刚 （上海喜赫精细化工有限公司，上海，201620） 摘要：喜赫乙二胺二邻苯基乙酸钠（EDDHA-Na）无磷环保，在碱性条件下对重金属离子螯合作用强，并具有优异的分散性能，既能有效地抑制漂白工作液中的Mn2+、Cu2+、Fe3+对过氧化氢的过度激活，也能分散悬浮水玻璃（Na2SiO3）在碱性溶液中形成的胶体，防止水玻璃胶体发生团聚，增加水玻璃与过氧化氢的接触面积。以乙二胺、氯乙酸、癸酰氯为原料，合成喜赫EDDHA-Na，测试了产物的各种螯合性能与分散性能，并与水玻璃共同应用于麦草浆的漂白，实验结果表明EDDHA-Na的漂白效果优于乙二胺四乙酸（EDTA）和二乙烯三胺五乙酸（DTPA）。 关键词：无磷；EDDHA-Na；水玻璃；麦草浆；漂白 Synthesis of Ethy Diaminedhephen Acetic-Na and the Application in Bleaching Process of Wheat Straw Pulp YU Xing-kai , WEI Jie-gang (Shanghai Xihe Fine Chemical Co., Ltd, Shanghai, 201620,China) Abstract：EDDHA-Na has a strong chelating ability on heavy metal ions under alkaline conditions and the excellent dispersion properties, which is environmentally friendly. It can not only effectively inhibit the Mn2+、Cu2+、Fe3+activating hydrogen peroxide in the bleaching solution, It can also disperse the silicate colloid in alkaline solution, which can prevent silicate glass colloid from congregating and increase the contact area between silicate glass and hydrogen peroxide.EDDHA-Na was synthesized from ethylenediamine, chloroacetic acid and decyl chloride, and the chelating and dispersing properties were tested, the results showed that the best bleaching effect could be obtained by adding EDDHA-Na and silicate glass in the bleaching process of wheat straw pulp, the bleaching effect of EDDHA-Na was better than the EDTA and DTPA. Key words：no phosphorus; EDDHA-Na; sodium silicate; wheat straw pulp; bleaching