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合成双酚F的工艺研究
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摘要
双酚F(BPF)是一种重要的有机化工原料,主要用于生产环氧树脂材料。由于其性能优异且用途广泛,已成为一种极具市场潜力的化工产品。世界上BPF主要采用路易斯酸催化法生产,磷酸催化法是一种很有发展潜力的工艺路线。
     本文对以甲醛和苯酚为原料制备BPF的合成工艺过程进行了研究。
     首先,研究了苯酚和甲醛合成BPF中使用的催化剂。与其他强酸型催化剂相比,磷酸催化剂具有更好的催化性能,有利于合成的进行。
     其次,在磷酸催化条件下考察了反应时间、反应温度、催化剂加入量、原料配比对BPF收率和反应选择性的影响。确定了适宜反应条件:酚醛摩尔比10:1,催化剂用量为苯酚磷酸摩尔比10:1,反应温度60℃,反应时间4小时。在此条件下BPF收率能达到90%,过程选择性为100%。对催化剂的重复使用进行了考察,使用五次BPF收率仍然维持在70%以上,选择性大于85%。运用气相色谱对苯酚的含量进行检测,产品组成由高效液相色谱( HPLC)进行测试。
     最后,研究了溶剂对产品异构体组成的影响,可用于合成不同品质要求的BPF。
Bisphenol-F (BPF) is an important organic chemical material, mainly used for the produce of epoxy resin. Because of its excellent properties and comprehensive application, BPF has huge market potential. BPF was mainly produced by the classical method of Lewis acid catalytic process in the world,the process of using phosphoric acid catalyst to BPF is a process with a great potential.
     The synthesis process of BPF from formaldehyde and phenol was studied in this paper.
     Firstly, the catalysts used for synthesis of BPF from formaldehyde and phenol were studied. Phosphoric acid catalyst was used, whose catalytic performance was excellent compared with the strong acid catalysts.
     Secondly, the effects of reaction time, temperature, amount of catalyst, mole ratio of reagent on BPF yield rate and reaction selectivity were studied by using phosphoric acid catalyst. The optimal reaction conditions were: mole ratio of phenol to formaldehyde was 10/1, mole ratio of phenol to catalysts was 10/1, reaction temperature was 60℃and reaction time was 4 hours. Under the above conditions, the BPF yield reached more than 90%, the reaction process selectivity was 100%. Recycle of catalyst was also studied, BPF yield remains above 70% and the reaction process selectivity was also above 85% after the catalyst was used for five times. The amount of phenol was tested by GC and the content of product was test by HPLC.
     Finally, the effect of solvent to the product content was studied, to synthesize different quality of BPF.
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