Authors:
Lining Zhang
1
;
Duo Zhao
2
;
Peng Wu
1
;
Jinsheng Sun
1
;
Lili Liu
1
;
Yulan Ji
1
and
Shuo Jiang
1
Affiliations:
1
Tianjin University, China
;
2
Henan Shenma Nylon Chemical Co. Ltd, China
Keyword(s):
Washing oil, Coupling separation technology, Distillation, Crystallization, Process simulation.
Related
Ontology
Subjects/Areas/Topics:
Application Domains
;
Chemical and Petroleum Engineering
;
Industrial Processes
;
Simulation and Modeling
Abstract:
Washing oil, one of the important distillation cut of coal tar, consists of a series of high value-added components which can form azetropic and eutectic system, making it impossible to separate certain components completely by normal distillation. In this work, a scheme coupling distillation with crystallization to deal with this cut for pure chemicals is simulatively investigated before an industrial design. By the aid of this research, a 25Kt/a pilot scale unit was successfully designed which is now running with α-methyl-naphthalene, β-methyl-naphthalene, fluorene, dibenzofuran and acenaphthylene in high purity as main products and naphthalene fraction, medium washing oil (dimethylnaphthalene) and heavy washing oil as by-products.