Method for dechlorinating coal tar

• Main Authors: MA XIAOTAO, LIU JIANLU, LI LIZHEN, WU YUQI, ZHU RONGZHEN, DONG YAXIN, LI QINGCAN, SUN YUNXIU
• Format: Patent
• Language: Chinese; English
• Published: 19.04.2024
• Subjects: CHEMISTRY; FUELS; LUBRICANTS; METALLURGY; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PYROLIGNEOUS ACID; TECHNICAL GASES CONTAINING CARBON MONOXIDE; WORKING-UP PITCH, ASPHALT, BITUMEN, TAR

The invention provides a coal tar dechlorination method which is characterized by comprising the following steps: mixing coal tar and an alcohol aqueous solution, stirring and reacting at 50-80 DEG C for 20-60 minutes, and preserving heat and settling a reaction product for 1-2 hours to separate a water phase from an oil phase; and mixing the separated oil phase with an alcohol aqueous solution, carrying out a stirring reaction at 50-80 DEG C for 20-60 min, carrying out heat preservation and sedimentation on the reaction product for 1-2 h to separate the water phase from the oil phase, carrying out centrifugal separation on the separated oil phase to remove water so as to obtain dechlorinated coal tar, and carrying out distillation recovery on the water phase. The method is convenient to operate and simple in process, has a good dechlorination effect, can remove nitrogen while dechlorinating, can effectively solve the problems of equipment corrosion, catalyst deactivation and device coking in the processing p