| 无烟煤碱氧氧化及选择性脱羧制取均苯四甲酸 |
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| 引用本文： | 杜琨,李煜,范志芳,吴红.无烟煤碱氧氧化及选择性脱羧制取均苯四甲酸[J].六盘水师范高等专科学校学报,2013(4):61-64. |
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| 作者姓名： | 杜琨 李煜 范志芳 吴红 |
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| 作者单位： | 六盘水师范学院 化学与化学工程系,贵州六盘水,553001 |
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| 基金项目： | 贵州省教育厅2010年度自然科学研究项目(No.2010099)；六盘水市科技局2011年度工业攻关计划。 |
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| 摘 要： | 以陕西无烟煤为原料,在氢氧化钾碱性溶液及氧气中碱氧氧化得到水溶酸,再将水溶酸在硫酸氢钾和浓硫酸混合介质中进行选择性脱羧,进而采用溶剂重结晶法制取均苯四甲酸。考察了不同反应条件对水溶酸脱羧产品粗均苯四甲酸产率的影响,得到最佳脱羧条件是:反应温度330℃,水溶酸:浓硫酸:硫酸氢钾=1:2:5,反应时间1.5h。在用溶剂重结晶法制取纯均苯四甲酸的步骤中,最佳溶剂是2-戊酮。
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| 关 键 词： | 无烟煤 水溶酸 选择性脱羧 均苯四甲酸 |
Alkali Oxygen and Selectively Decarboxylated of Anthracite to Prepare Pyromellitic Acid |
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| DUKun
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LI Yu
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FAN Zhi-fang
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WU Hong.Alkali Oxygen and Selectively Decarboxylated of Anthracite to Prepare Pyromellitic Acid[J].Journal of Liupanshui Teachers College,2013(4):61-64. |
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| Authors: | DUKun LI Yu FAN Zhi-fang WU Hong |
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| Institution: | DU K un; LI Yu; FAN Zhi-fang; WU Hong (Department of Chemistry and Chemical Engineering, Liupanshui 553001,China) |
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| Abstract: | Shanxi anthracite has been subjected to oxygen-oxidation at 260~C in all aqueous solution of potas- sium hydroxide to produce water-soluble coal acids （CA）, then the water-soluble coal acids have been selec- tively decarboxylated in the mixed medium of KHSO, and H2SO, to produce crude pyromellitic acid （PA）. The study has obtained the best decarboxylated conditions： reaction temperature 330℃ ; CA：H2SO4·KHSO4 = 1：2：5 and the reaction time is 1.5h. Pure PA is obtained by solvent recrystallization method and the best sol- vent was 2-pentanone. |
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| Keywords: | anthracite water-soluble coal acid selectively decarboxylated pyromellitic acid |
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