| 催化歧化法合成羟基乙酸 |
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| 引用本文： | 赵林林,刘华庆,潘巧,杨洲,袁华. 催化歧化法合成羟基乙酸[J]. 精细石油化工, 2013, 30(1): 21-23 |
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| 作者姓名： | 赵林林 刘华庆 潘巧 杨洲 袁华 |
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| 作者单位： | 武汉工程大学绿色化工过程省部共建教育部重点实验室,湖北省新型反应器与绿色化学工艺重点实验室,湖北武汉430073 |
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| 基金项目： | 湖北省自然科学基金，武汉市科技攻关计划 |
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| 摘 要： | 研究了对羟基乙酸的合成新工艺进行。以质量浓度为20%的Ca(OH)2为催化剂,在10～30℃催化乙二醛分子内歧化反应得到羟基乙酸钙,反应时间约1h为宜。羟基乙酸钙再用硫酸酸化得到羟基乙酸,产率大于95%。利用硫酸钙沉淀的形成可以方便地去除金属钙离子,反应选择性好,工艺过程简捷。
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| 关 键 词： | 乙二醛 氢氧化钙 歧化反应 羟基乙酸 |
SYNTHESIS OF GLYCOLIC ACID BY DISPROPORTATIONATION REACTION OF GLYOXAL |
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| Zhao Linlin , Liu Huaqing , Pan Qiao , Yang Zhou , Yuan Hua. SYNTHESIS OF GLYCOLIC ACID BY DISPROPORTATIONATION REACTION OF GLYOXAL[J]. Speciality Petrochemicals, 2013, 30(1): 21-23 |
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| Authors: | Zhao Linlin Liu Huaqing Pan Qiao Yang Zhou Yuan Hua |
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| Affiliation: | (Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Chemical Reactor and Green Chemical Technology, Wuhan Institute of Technology,Wuhan 430073,Hubei,China) |
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| Abstract: | A new synthetic technology of glycolic acid was studied.Calcium glycollate was synthesized by intramolecular disproportionation reaction from glyoxal with Ca(OH)2 as catalyst,while the mass concentration of Ca(OH)2 was 20% or so,the temperature was controlled between 10-30 ℃ and reaction time was about 1 h.Glycolic acid was then obtained through acidification with H2SO4 and the yield was above 95%.Meanwhile,Ca2+ ion was easily removed through the form of CaSO4 precipitate.The reaction has good selectivity and simple process. |
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| Keywords: | glyoxal calcium hydroxide disproportionation reaction glycolic acid |
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