无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2016, Vol. 48 ›› Issue (8): 21-.

• 论文 • 上一篇    下一篇

次磷酸铝的制备及动力学研究

周 芳1,2,陈玉婷1,徐源来1,2,池汝安1,2   

  1. 1.武汉工程大学化工与制药学院,湖北武汉 430073;2.绿色化工过程教育部重点实验室
  • 出版日期:2016-08-10 发布日期:2016-08-10

Preparation and kinetic research of aluminum hypophosphite

Zhou Fang1,2,Chen Yuting1,Xu Yuanlai1,2,Chi Ru′an1,2   

  1. 1.School of Chemical Engineering & Pharmacy,Wuhan Institute of Technology,Wuhan 430073,China;
    2. Key of Laboratory for Green Chemical Process of Ministry of Education
  • Published:2016-08-10 Online:2016-08-10

摘要: 为了获得一种高效的无卤阻燃剂,采用一水次磷酸钠和十八水硫酸铝合成次磷酸铝。考察了反应温度、原料物质的量比、反应时间对次磷酸铝产率的影响,并通过一级动力学方程和二级动力学方程模拟研究了其反应机理。结果表明,当优化后的反应条件,即反应温度为90 ℃、反应时间为3 h、次磷酸钠与硫酸铝物质的量比为7.5∶1时,所得次磷酸铝产品产率为96.61%。一水次磷酸钠与十八水硫酸铝合成次磷酸铝属于动力学一级反应,反应动力学常数方程式:k=18exp(-10 547/RT) ,反应活化能Ea=10 547 J/mol。对所得产品进行IR、XRD和SEM-EDS表征,结果表明产品为目标产物次磷酸铝。

关键词: 次磷酸铝, 次磷酸钠, 硫酸铝, 动力学

Abstract: In order to obtain a kind of efficient halogen-free flame retardant,sodium hypophosphite monohydrate and aluminum sulfate octadecahydrate were applied to prepare aluminum hypophosphite.The influences of reaction temperature,amount-of- substance ratio of raw materials,and reaction time on the yield of aluminum hypophosphite were investigated and its reaction mechanism was further researched by the first-order and the second-order kinetic equations.Results showed that when the re- action temperature was 90 ℃,reaction time was 3 h,and the amount-of-substance ratio of sodium hypophosphite to aluminum sulfate was 7.5∶1,the yield of aluminum hypophosphite was up to 96.61%.The reaction process of sodium hypophosphite and aluminum sulfate to generate aluminum hypophosphite belonged to first-order kinetic reaction.The reaction kinetic constant was k=18exp(-10 547/RT),and the reaction activation energy was 10 547 J/mol.The obtained aluminum hypophosphite pro- ducts were characterized by IR,XED,and SEM-EDS and the result confirmed the product was aluminum hypophosphite.

Key words: aluminum hypophosphite, sodium hypophosphite, aluminum sulfate, kinetics

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