化工学报Issue(6)：2131-2138,8.DOI:10.11949/j.issn.0438-1157.20141804
低温煤焦油中特定芳烃组分的选择性分离
Selective separation of aromatic hydrocarbons from low temperature coal tar
摘要
Abstract
This study was to achieve selective separation of specific aromatic hydrocarbons from low temperature coal tar. The feedstock was pretreated to separate phenols and enrich specific aromatic hydrocarbons, and then extracted by multiple solvents to separate selectively aromatic and non-aromatic hydrocarbons. The extraction conditions were optimized by the theory of Hansen solubility parameter. Selectivity of the extraction process was enhanced with the rise of Hansen solubility distance (Ra), while dissolving capacity decreased with the increase of Ra. The multiple solvents suggested in the study were dimethyl formamide (DMF)+6%water (volume fraction), and the optimized extraction condition was 25℃ and solvent/oil ratio of 6:1. The raffinate was extracted repeatedly under the optimized condition to collect residual aromatic hydrocarbons. The extract was extracted by formamide repeatedly to increase the concentration of aromatics and separate heterocyclic compounds and other polar components. Consequently, the mass percentage of aromatic hydrocarbons in the product was ca. 95%and the total yield of aromatics was ca. 94%;phenols, non-aromatics and other polar components were also separated selectively from the feedstock. The extraction solvent of aromatics was recovered by reduced pressure distillation, which was stable during the extraction and recycle process.关键词
低温煤焦油/分离/萃取/溶解性/Hansen溶度参数Key words
low temperature coal tar/separation/extraction/solubility/Hansen solubility parameter分类
化学化工引用本文复制引用
姜广策,张生娟,王永刚,王中奇,林雄超,许德平..低温煤焦油中特定芳烃组分的选择性分离[J].化工学报,2015,(6):2131-2138,8.基金项目
国家自然科学基金联合基金项目（ U1261213， U1361124）；国家高技术研究发展计划项目（2011AA05A2031）。@@@@supported by the Joint Funds of the National Natural Science Foundation of China (U1261213, U1361124) and the National High Technology Research and Development Program of China (2011AA05A2031) （U1261213, U1361124）
