神木中低温煤焦油酚类物质的分离与利用

SEPARATION AND UTILIZATION OF PHENOLIC COMPOUNDS IN SHENMU LOW-TEMPERATURE COAL TAR

测定了陕西神木中低温煤焦油轻油（L-tar）和重油（H-tar）的基本性质.通过常压蒸馏将煤焦油切割为〈220℃,220℃~260℃,260℃~300℃和〉300℃四段馏分.利用酸碱法对〈220℃,220℃~260℃,260℃~300℃三段馏分进行酚类提取研究,测定了三段馏分的总酚含量及最小碱油比.通过正交实验确定最佳碱洗条件,在最佳条件下,轻油对应的馏分段的总酚收率分别为92.23%,89.99%和87.91%;重油对应馏分段的总酚收率分别为94.60%,91.88%和90.73%.考察了所提取的混酚替代苯酚合成酚醛树脂的性能,轻油和重油混酚树脂的黏度及固含量分别为3.18Pa·s和3.73Pa·s以及79.39%和82.15%.

The basic properties of light and heavy oil of Shaanxi Shenmu low temperature coal tar were determined.The coal tar was cut into four fractions of〈220 ℃,220 ℃-260 ℃,260 ℃-300℃and〉300℃ by atmospheric distillation.The extraction of phenol from three fractions of〈220 ℃,220℃-260℃and 260℃-300℃ was studied with the method of acid and alkali,and total phenol content and minimum soda-oil ratio was determined.The optimum soda washed conditions was determined by orthogonal experiment,and under optimal conditions,the total yield of phenol of light oil fraction segments corresponding 92.23%,89.99% and 87.91%;heavy oil fraction segments corresponding to a yield of 94.60% of total phenols,91.88% and90.73%.The properties of phenol formaldehyde resin synthesized by the mixture was studied,and phenol resin of light and heavy oil＇s viscosity and solid content were 3.18Pa·s,3.73Pa·s and 79.39%,82.15%.