Recycling of valuable chemicals through the catalytic decomposition of phenol tar in cumene process |
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| Authors: | Changjun Zou Pinwen Zhao Ju Ge Jianxiu Li Linchao Yu Jun Qiu Rangong Sun |
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| Institution: | 1. School of Chemistry and Chemical Engineering, Southwest Petroleum University, No. 8 Xindu Road, Chengdu 610500, PR China;2. Shandong Bohai Industrial Co. Ltd., Bingzhou 256500, PR China;3. Department of Applied Chemistry, Jilin Institute of Chemical Technology, Jilin 132022, PR China;4. PetroChina Sichuan Petrochem1ical Corp. Ltd., Chengdu 610036, PR China;1. State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China;2. Department of Civil and Environmental Engineering, University College Cork, Cork, Ireland;3. St Edmund Hall, Queen''s Lane, Oxford OX1 4AR, UK;4. National Marine Environmental Monitoring Center, Dalian 116023, China;1. Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China;2. Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga 816-8580, Fukuoka, Japan |
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| Abstract: | The base catalyst LZ-2, which was the mixture of CaO and Na–NaOH/Al2O3·3H2O, was chosen for the decomposition of phenol tar to generate valuable chemicals. The selectivity of LZ-2 for dimethyl phenyl carbinol, α-methyl styrene dimer and cumenyl phenol was 100%, 100% and 98%, respectively. Under the optimum operating conditions of catalyst 2.5 wt%, operating temperature 603.15 K and decomposition time 3.5 h, decomposition ratios of cumenyl phenol and dimethyl phenyl carbinol were 98.7% and 99.97%, respectively. In addition, the experimental repeatability demonstrated that the total yield of valuable chemicals still reached 90.1% after the catalyst being used five times. Mass and energy balance indicated that the catalytic decomposition was a high potential for the recycling of chemicals from phenol tar. |
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