化工学报 ›› 2016, Vol. 67 ›› Issue (9): 3699-3706.DOI: 10.11949/j.issn.0438-1157.20160458

• 催化、动力学与反应器 • 上一篇    下一篇

改性介孔硅负载铂催化合成农用增效剂

谢慧琳1, 张蔚欣1, 朱贵有1, 胡文斌1,2, 廖列文1, 贾振宇1, 刘其海1   

  1. 1 仲恺农业工程学院化学化工学院, 广东 广州 510225;
    2 中山大学惠州研究院, 广东 惠州 516081
  • 收稿日期:2016-04-08 修回日期:2016-06-07 出版日期:2016-09-05 发布日期:2016-09-05
  • 通讯作者: 胡文斌
  • 基金资助:

    国家自然科学基金项目(21476272);广东省科技厅项目(2014A010105049,2015A040404044);广东省教育厅资助项目(2013KJCX106);广东省自然科学基金项目(2015A030313595);广东大学生科技创新培育专项资金项目(pdjh2016b0251);仲恺农业工程学院研究生科技创新基金资助项目(KA151495001,KA151495002)。

Modified mesoporous silica supporting platinum catalyst for synthesis of agricultural synergist

XIE Huilin1, ZHANG Weixin1, ZHU Guiyou1, HU Wenbin1,2, LIAO Liewen1, JIA Zhenyu1, LIU Qihai1   

  1. 1 College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, Guangdong, China;
    2 Huizhou Research Institute of Sun Yat-sen University, Huizhou 516081, Guangdong, China
  • Received:2016-04-08 Revised:2016-06-07 Online:2016-09-05 Published:2016-09-05
  • Supported by:

    supported by the National Natural Science Foundation of China (21476272), the Project of Guangdong Provincial Science and Technology Department (2014A010105049, 2015A040404044), the Project of Guangdong Provincial Education Department (2013KJCX106),the Natural Science Foundation of Guangdong Province (2015A030313595), the Project of Guangdong Provincial Undergraduate Scientific Innovation Fund (pdjh2016b0251) and the Project of Graduate Scientific Innovation Fund of Zhongkai University of Agriculture and Engineering (KA151495001, KA151495002).

摘要:

通过壳聚糖(CS)改性介孔二氧化硅,并负载铂得到Pt/CS-SiO2催化剂,采用红外光谱(FTIR)、氮气吸附脱附(BET)、热重分析(TG)等对催化剂进行表征,同时考察了Pt/CS-SiO2催化聚醚和三硅氧烷反应合成农用增效剂。结果表明:Pt成功负载在改性介孔硅上,Pt含量为0.85%;催化剂具有良好的重复使用性,使用7次后仍有较高活性,转化率和选择性均在90%以上;合成农用增效剂的最优工艺为n(MDHM):n(HDE)=1:1.1,反应温度为105℃,反应时间为3 h。测试产物在不同pH的水溶液中的水解性能,发现其在中性条件下可以比较稳定地存在。

关键词: 催化, 二氧化硅, 壳聚糖, 合成, 农用增效剂

Abstract:

Pt/CS-SiO2 catalyst was prepared by impregnating platinum on chitosan modified mesoporous silica and characterized by Fourier Transform Infrared Spectroscopy (FTIR), nitrogen adsorption-desorption (BET), thermogravimetric analysis (TGA). Catalytic performance was evaluated in hydrosilylation of polyether and trisiloxane for synthesizing agricultural synergist. The experimental results showed that Pt was successfully incorporated on modified mesoporous silica at content of 0.85%. The new catalyst had excellent reusability, which still maintained high activity with greater than 90% of both conversion and selectivity after reused seven times. The optimal synthesis condition for agricultural synergist was a mixture of polyether and trisiloxane at a molar ratio of 1:1.1 and 105℃ for 3 h. The agricultural synergist exhibited excellent stability in neutral aqueous solution by hydrolysis assessment at various pH conditions.

Key words: catalysis, silica, chitosan, synthesis, agricultural synergist

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