Method for treating exhaust gas in process of producing crude phenol from coal tar

A method for treating exhaust gas in the process of producing crude phenol from coal tar is to absorb waste gas containing acid fog, which is generated in the process of decomposing net phenol sodiumsalt by sulfuric acid process in an absorption tower by using intermediate product of net phenol sodi...

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Main Authors LI YUCAI, WU LIANSHENG, WEN ZHIJIE, NIE KUANGXIN, YU ZHIYI, HE YUN, SONG XIAOXIA, YE YUZHANG, WANG HUAXIN, YU QIANG, LIU XIAOQING
Format Patent
LanguageChinese
English
Published 10.02.2010
Subjects
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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Summary:A method for treating exhaust gas in the process of producing crude phenol from coal tar is to absorb waste gas containing acid fog, which is generated in the process of decomposing net phenol sodiumsalt by sulfuric acid process in an absorption tower by using intermediate product of net phenol sodium salt generated from phenol fraction obtained from distilling and washing coal tar by NaOH watersolution in the process of producing crude phenol from coal tar. Exhausted offgas treated by using the method conforms to national secondary standard; in addition, the method uses intermediate productof net phenol sodium salt in the production process as absorbent other than alkaline absorbent, thus protecting environment and lowering production cost.
Bibliography:Application Number: CN20091195020