核桃壳液化及其与甲醛反应能力的研究

Walnut shell liquefaction and reaction ability of liquefied product with formaldehyde

探讨了核桃壳在120℃、苯酚与核桃壳粉质量比为3/1和催化剂(浓硫酸,用量为苯酚的3%)存在下液化,通过分析液化体系内游离苯酚和残渣含量以及液化体系与甲醛反应能力发现,核桃壳的酚解和酚化反应主要发生在反应初期,以后逐渐减弱;液化体系内总的活性量由2部分组成,一是液化体系内游离苯酚贡献的活性量,二是体系内液化产物贡献的活性量。随着反应的进行,游离苯酚折算的耗醛量逐渐减少,液化产物的耗醛量逐渐增加,而总的液化体系中消耗甲醛的能力在逐渐减弱。

This paper mainly discussed the liquefaction system of walnut shell powder under the following liquefaction condition： temperature is 120 ℃, liquid ratio is 3/1 （weight ratio of phenol/walnut shell）and dense sulfuric acid content is 3% of phenol weight. Through analysing the free phenol content and the unliquefied walnut shell powder content of the liquefaction system and the reaction ability of the liquefied product with formaldehyde, we finded that the decomposition and the reaction with phenol for walnut shell powder mainly happened in the first 10 minutes, then gradually weakened; the whole quantity of active substance can bedivided into two parts, one is from free phenol and the other is from walnut shell liquefied products; as the reaction time extended the content of free phenol, as active substance decreased, the content of walnut shell liquefied products increased and the whole liquefaction system reaction ability with formaldehyde reduced.