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[1]李冬燕,于清跃.脱铝USY催化剂上柠檬酸三丁酯的合成[J].南京工业大学学报(自然科学版),2013,35(01):1-96.[doi:10.3969/j.issn.1671-7627.2013.01.020]
 LI Dongyan,YU Qingyue.Synthesis of tributyl citrate by dealuminium USY zeolite catalyst[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2013,35(01):1-96.[doi:10.3969/j.issn.1671-7627.2013.01.020]
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脱铝USY催化剂上柠檬酸三丁酯的合成()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
35
期数:
2013年01期
页码:
1-96
栏目:
出版日期:
2013-01-20

文章信息/Info

Title:
Synthesis of tributyl citrate by dealuminium USY zeolite catalyst
文章编号:
1671-7627(2013)01-0096-04
作者:
李冬燕于清跃
南京化工职业技术学院 化工系,江苏 南京 210048
Author(s):
LI Dongyan YU Qingyue
Department of Chemical Engineering, College of Nanjing Chemical Technology, Nanjing 210048,China
关键词:
柠檬酸 正丁醇 柠檬酸三丁酯 酯化反应 超稳Y沸石
Keywords:
citric acid n-butyl alcohol tributyl citrate esterification USY
分类号:
TQ225.24;TQ320.4
DOI:
10.3969/j.issn.1671-7627.2013.01.020
文献标志码:
A
摘要:
对超稳Y沸石(USY)进行水蒸气和硝酸铵水溶液脱铝,并采用过量浸渍法制备脱铝USY负载磷钨酸(PW)催化剂,使用氨程序升温脱附(NH3-TPD)技术表征其酸性质,并在柠檬酸与正丁醇的酯化反应中考察其催化性能。结果表明:催化剂的酸量和酸强度与USY脱铝程度相关,水蒸气脱铝后的USY1具有较大酸量和适宜的酸强度。USY1催化剂具有最大的柠檬酸转化率(97.3%),柠檬酸正三丁酯的选择性为98.8%,适宜反应条件为反应温度110 ℃,反应时间90 min; 反应4次后柠檬酸的转化率保持在80%以上,产品选择性高于98%。
Abstract:
Catalysts were made by dealuminumed ultrastable Y-type zeolite(USY)treated with water vapour and ammonium nitrate aqueous solution and then 12-tungstophosphoric acid(PW)immobilized. The acid properties of catalysts were identified by ammonia program temperature desorption(NH3-TPD)techniques. The results showed that the acid amount and the acid site strength of sample were related with the dealuminum degree of USY. USY1 kept the more acid amount and the medium acid site strength after vapour dealuminum. Catalytic performances of catalyst samples for esterification of citric acid and n-butyl alcohol were investigated. Experimental results showed that under the suitable reaction conditions of reaction temperature 110 ℃ and balanced time 90 min, the conversion of citric acid was 97.3%, and the selectivity of tributyl citrate was higher than 98.8%. After catalyst recycle four times, the conversion of citric acid kept more than 80% and the selectivity of tributyl citrate was above 98%.

参考文献/References:

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[8] 李冬燕,于清跃 仲兆祥.复合催化剂MgO-氢型丝光沸石上柠檬酸与正丁醇的酯化反应[J].精细石油化工,2012,29(1):13-16.
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备注/Memo

备注/Memo:
收稿日期:2012-05-04
基金项目:国家自然科学基金(20806038); 南京化工职业技术学院重点科研项目(NHKY-2011-03)
作者简介:李冬燕(1979—),女,河北张家口人,讲师,主要研究方向为催化反应过程,E-mail:ldy790319@163.com..
更新日期/Last Update: 2013-01-20