摘要
以煤焦油为原料,通过重力预沉降、离心分离处理,制备出优质的针状焦生产原料,煤焦油中喹啉不溶物(QI)质量分数<0.1%。结果表明,通过重力预沉降处理,煤焦油中QI质量分数可脱除20%～30;%在煤焦油中添加有机溶剂,煤焦油黏度和密度明显改善,离心分离效果显著提高,净化焦油产率显著增加。重力预沉降处理的适宜工艺条件为:焦油温度为75℃,静置时间为24h;离心分离处理的适宜工艺条件为:焦油温度为80℃,添加由轻油和洗油组成的混合溶剂,轻油∶洗油(质量比)=1∶1,煤焦油∶混合溶剂(质量比)=1∶0.3,离心机转速为5 000r/mi n,离心分离时间为1mi n。
By gravitational decantation and centrifugal separation treatmentm,the mass concentration of quinoline insoluble(QI) in coal tar is less than 0.1%.The optimum conditions for the gravitational decantation are as follows: temperature of the coal tar is 75℃,and the static residence time,24h.The appropriate technical conditions of the centrifugal separation are as follows: temperature of the coal tar is 80℃,mixed solvent of the light naphtha and washing oil is put in coal tar,the mass ratio of light naphtha and...
出处
《煤化工》
CAS
2008年第2期11-13,共3页
Coal Chemical Industry
基金
湖南省自然科学基金资助项目(No.05JJ30144)
湖南省教育厅资助科研项目(No.07C290)
关键词
煤焦油
净化
喹啉不溶物
重力预沉降
离心分离
coal tar
purification
quinoline insoluble
gravitational decantation
centrifugal separation
