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[1]向春鹏,李宇昊,杜治平*.碳酸丙烯酯的La修饰羟基磷灰石催化尿素醇解法合成[J].武汉工程大学学报,2019,(02):109-114.[doi:10. 3969/j. issn. 1674?2869. 2019. 02.]
 XIANG Chunpeng,LI Yuhao,DU Zhiping*.Synthesis of Propylene Carbonate from Alcoholysis of Urea Catalyzed by La-Modified Hydroxyapatites[J].Journal of Wuhan Institute of Technology,2019,(02):109-114.[doi:10. 3969/j. issn. 1674?2869. 2019. 02.]
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碳酸丙烯酯的La修饰羟基磷灰石催化尿素醇解法合成(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
期数:
2019年02期
页码:
109-114
栏目:
化学与化学工程
出版日期:
2019-04-18

文章信息/Info

Title:
Synthesis of Propylene Carbonate from Alcoholysis of Urea Catalyzed by La-Modified Hydroxyapatites
文章编号:
20190202
作者:
向春鹏12 李宇昊12 杜治平*12
1. 绿色化工过程教育部重点实验室(武汉工程大学),湖北 武汉 430205;2. 新型反应器与绿色化学工艺湖北省重点实验室(武汉工程大学),湖北 武汉 430205
Author(s):
XIANG Chunpeng12 LI Yuhao12 DU Zhiping* 12
1. Key Laboratory of Green Chemical Process (Wuhan Institute of Technology) ,Ministry of Education, Wuhan?430205,China;2. Hubei Key Laboratory of Novel Chemical Reactor & Green Chemical Technology (Wuhan Institute of Technology), Wuhan?430205, China
关键词:
尿素醇解碳酸丙烯酯羟基磷灰石12-丙二醇
Keywords:
urea alcoholysis propylene carbonate hydroxyapatite 12-propanediol
分类号:
TQ203.2
DOI:
10. 3969/j. issn. 1674?2869. 2019. 02.
文献标志码:
A
摘要:
为研究La对羟基磷灰石(HAP)的修饰方式对尿素醇解合成碳酸丙烯酯(PC)的影响,采用浸渍法制、物理混合法和离子交换法分别制备了La/HAP、La2O3/HAP和La-HAP,并结合X射线衍射、N2吸附、扫描电镜和CO2程序升温脱附表征对催化剂的构效关系进行了分析。结果表明,La元素的引入可以提高HAP在尿素醇解中的催化活性,其中La/HAP的催化活性最高,La2O3/HAP的次之,La-HAP的活性最差。La3+与HAP中Ca2+的离子交换,以及表面La2O3与HAP之间的强相互作用共同促进了La/HAP表面新的强碱性活性位的形成是La/HAP活性高的主要原因。以La/HAP为催化剂,在原料尿素与1,2-丙二醇的物质的量比为1∶4,反应温度为170 ℃,反应时间为2 h,催化剂用量5.0%(以尿素的质量计)的条件下,PC的收率为94.2%。
Abstract:
To investigate the effects of La modified hydroxylapatite (HAP) on synthesis of propylene carbonate (PC) by urea hydrolysis, three catalysts, La/HAP, La2O3/HAP and La-HAP were prepared by impregnation, physical mixture and ion exchange, respectively, and were characterized by X-ray diffraction, N2 adsorption, scanning electron microscopy and CO2 temperature-programmed desorption. It was found that the introduction of La element could improve the catalytic activity of HAP in urea alcoholysis. Among them, La/HAP showed the highest catalytic activity, followed by La2O3/HAP and La-HAP. The superior catalytic activity of La/HAP might be attributed to the formation of strong basic sites produced by a synergic interaction between the lattice substitution of Ca2+ in HAP with La3+ and the strong interaction between HAP and La2O3 species dispersed on the surface of HAP. The yield of PC is 94.2% when La/HAP is used as a catalyst under conditions of molae ratio of urea to 1,2-propylene of 1∶4, reaction temperature of 170 ℃, reaction time of 2 h and catalyst amount of 5.0 % (based on urea).

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相似文献/References:

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备注/Memo

备注/Memo:
收稿日期:2019-02-22基金项目:国家自然科学基金(21276201)作者简介:向春鹏,硕士研究生。E-mail:491549609@qq.com*通讯作者:杜治平,博士,教授。E-mail:dzpxyhry@163.com引文格式:向春鹏,李宇昊,杜治平. 碳酸丙烯酯的La修饰羟基磷灰石催化尿素醇解法合成[J]. 武汉工程大学学报,2019,41(2):109-114.
更新日期/Last Update: 2019-04-20