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Citation: CHENG Chao, SONG Xinghua, XUE Yan. The Effect of Stannous Octanoate on the Synthesis of Lactide Using ZnO as Catalyst[J]. Chinese Journal of Applied Chemistry, ;2011, 28(3): 361-363. doi: 10.3724/SP.J.1095.2011.00355 shu

The Effect of Stannous Octanoate on the Synthesis of Lactide Using ZnO as Catalyst

1.
Department of Biology and Chemical Engineering, Nanyang Institute of Technology, Nanyang 473004

Corresponding author: CHENG Chao,
Received Date: 21 June 2010
Available Online: 29 August 2010
Fund Project: 河南省教育厅计划项目(2010C430001) (2010C430001)南阳理工学院青年基金(QNJJ200810)资助项目 (QNJJ200810)

Lactide was synthesized under high vacuum using ZnO as catalyst with the addition of stannous octanoate(Sn(Oct) ₂) at different intervals. The highest temperature of lactide distillation was decreased to 197℃. Lactide crystal was characterized by means of IR spectrum and its melting point was measured. The surface tensions of L-lactic acids after dehydration, after dehydration followed with the addition of zinc oxide or addition of both zinc oxide and stannous octanoate were 38.8, 47.0 and 40.3 N/m, respectively. Their viscosities were 43.1049, 59.6774 and 48.9376 mPa·s, respectively. These experimental results showed stannous octanoate can help the cracking of the bond between acyl and oxide in the intermediate and the decrease of surface tension of reaction system.
- zinc oxide,
- stannous octanoate,
- lactide,
- yield,
- the highest distillation temperature
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