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Citation: ZHAO Li-Ping, SHEN Jiu-Ming, ZHENG Xin-Sheng. Spherical Polynaphthoxazine Resin Acid Catalyzed Esterification Reaction[J]. Chinese Journal of Applied Chemistry, ;2008, 25(5): 605-608. shu

Spherical Polynaphthoxazine Resin Acid Catalyzed Esterification Reaction

1.
a College of Science, Huazhong Agriculture University, Wuhan 430070;
2.
b School of Chemistry and Chemical Engineering, Xinyang Normal College, Xinyang

Corresponding author: ZHENG Xin-Sheng,
Received Date: 8 May 2007
Available Online: 28 July 2007

Spherical polynaphthoxazine resin acid catalyst was prepared and applied to esterification reaction of glacial acetic acid and ethanol.Naphthoxazine precursor was converted into spherical polynaphthoxazine resin in methylsilicone oil by reversed-phase suspension polymerization,then polynaphthoxazine resin acid was generated from the reaction of sulfonation.Thermal stability and surface composition of the catalyst were measured by NETZSCH TG 209 and JSM-6390/LV SEM,respectively.Catalytic activity of the resin acid was evaluated through the esterification reaction of glacial acetic acid and ethanol.The results show that the pyrogenation of spherical polynaphthoxazine resin obtained by reversed-phase suspension polymerization will not take place at 300℃.Catalytic activity of the catalyst obtained from sulfonating spherical polynaphtho-xazine resin at 45℃ is the highest,and there is 4.29 mmol/g of sulfonic groups on the surface of resin.The conversion rate of glacial acetic acid was 77% with the catalyst obtained from sulfonation reaction at 45℃ when the reaction time was 2 h,catalyst dosage was 3% (on glacial acetic acid mass) and mole ratio of ethanol to acetic acid was 2:1.
- naphthoxazine,
- spherical resin,
- catalyst,
- esterification reaction
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