煤焦油深加工技术研究进展

综述了煤焦油组成、性质和近年来国内外煤焦油深加工发展情况。介绍了煤焦油中回收的洗油经过减压蒸馏切取不同温度段的馏分和脱酚洗涤,然后经过进一步的蒸馏、结晶、萃取,可以得到质量好、回收率高、工业上应用广泛的多种煤焦油化工产品,如萘、酚类化合物、吡啶盐基。研究了芴、吲哚、联苯等一些具有重要应用的煤焦油化工产品分离及精制方法。高、中、低温煤焦油催化加氢制取燃料油技术是煤焦油深加工新技术,该技术能够解决焦炉煤气放空燃烧污染环境的问题。 Summarize the composition,characteristics and research progress of coal tar.The most widely used coal tar chemical products such as naphthalene,phenolic compound,pyridinium could be prepared from the wash oil of coal tar.The products has high quality.The technological process is that,through vacuum distillation,first gather the fraction at different extraction temperature ranges,then dephenolize,distill,crystallize and extract.Study separation and purification methods of fluorene,benzpyrole and biphenyl.The preparation of fuel oil from coal tar by catalytic hydrogenation is the development direction of coal tar deep processing,which could reduce the pollution caused by coke oven gas combustion