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乙酸正丁酯

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乙酸正丁酯[1]
IUPAC名
Butyl acetate
别名 乙酸丁酯
醋酸正丁酯
醋酸丁酯
Acetic acid, n-butyl ester
Butile
缩写 BuAcO
识别
CAS号 123-86-4 ?
PubChem 31272
SMILES
性质
化学式 C6H12O2
摩尔质量 116.16 g·mol⁻¹
外观 无色有果香液体
密度 0.88 g/cm3
熔点 -74 °C(199 K)
沸点 126 °C(399 K)
溶解性 0.7 g/100 ml (20.0 °C)
蒸气压 10.7 hPa (20 °C)
危险性
警示术语 R:R10, R66, R67
安全术语 S:S2, S25
主要危害 可燃
闪点 24 °C (297 K)
致死量或浓度:
LD50中位剂量
14130 mg/kg (大鼠经口)[2]
若非注明,所有数据均出自一般条件(25 ℃,100 kPa)下。

乙酸正丁酯,简称乙酸丁酯,结构式CH3C(O)On-C4H9

性质

无色透明有愉快果香气味的液体。较低级同系物难溶于水;与等有机溶剂混溶。易燃。急性毒性较小,但对眼鼻有较强的刺激性,而且在高浓度下会引起麻醉。

乙酸正丁酯是一种优良的有机溶剂,对乙基纤维素、醋酸丁酸纤维素、聚苯乙烯、甲基丙烯酸树脂、氯化橡胶以及多种天然树胶均有较好的溶解性能。

制备

乙酸正丁醇硫酸催化下直接酯化,再经中和、脱水和分馏而得。


从乙酸与正丁醇制取乙酸正丁酯。

工业上的乙酸正丁酯生产工艺有连续法和间歇法,视生产规模不同而定。

近年来,利用固体酸和杂多酸等对设备腐蚀性小的酸催化剂,催化的乙酸正丁酯制备方法日渐增多,不过尚未见到成功用于工业生产的报导。

用途

乙酸正丁酯用作硝化纤维清漆、织物、人造革和塑料生产过程中的溶剂,石油和医药工业中的萃取剂,也用于香料复配以及香蕉、菠萝、杏、梨等多种香味剂的成分。

参考资料

  1. ^ Record of CAS RN 123-86-4 in the GESTIS Substance Database from the IFA英语Institute for Occupational Safety and Health
  2. ^ 中国化工产品大全 上卷,Da252 醋酸正丁酯,页557
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乙酸正丁酯
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