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Author(s): |
Hua Song, College of Chemistry ＆ Chemical Engineering, Northeast Petroleum University, Daqing, China/Provincial Key Laboratory of Oil ＆Gas Chemical Technology, College of Chemistry ＆ Chemical Engineering, Northeast Petroleum University, Daqing, Heilongjing, China
Ming Guan, College of Chemistry ＆ Chemical Engineering, Northeast Petroleum University, Daqing, China
Nianhai Qiu, College of Chemistry ＆ Chemical Engineering, Northeast Petroleum University, Daqing, China
Yan Li, College of Chemistry ＆ Chemical Engineering, Northeast Petroleum University, Daqing, China |
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Abstract: |
Liquid-phase oxidation of m-xylene to m-phthalic acid with 30% hydrogen peroxide over cobaltous acetate at atmospheric condition was studied. The effects of catalyst dosage, sorts and amounts of promoter, oxidant dosage, acetic anhydride dosage, amount of solvent, reaction temperature and time on oxidation were investigated. At cobaltous acetate catalyst to m-xylene mass fraction of 0.05, sodium bromide promoter to m-xylene mass fraction of 0.07，30% hydrogen peroxide to m-xylene molar ratio of 3.5, acetic anhydride to m-xylene molar ratio of 2.75, glacial acetic acid to m-xylene molar ratio of 6.5, a reaction temperature of 65?C for 6 h, the m-xylene conversion was 95.9% and the m-phthalic acid yield was 59.5%.
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