SO_4~(2-)/TiO_2-La_2O_3�߻��ϳɼ��Ĵ��

ժҪ ��ϡ��峬ǿ��SO42-/TiO2-La2O3Ϊ�߻��,��ͼ��Ĵ�Ϊԭ�Ϻϳɼ��Ĵ��,��Ӱ�췴Ӧ��ء��,SO42-/TiO2-La2O3�Ժϳɼ��Ĵ��õĴ߻��ԡ��˷�Ӧ��Ϊ:�߻��ռ��Ӧ��2.5%,��ظ�ʹ��ԡ��ᴼĦ��Ϊ8.00(��Ϊ0.5 mol)��Ӧʱ��Ϊ90 min�ʹ�ˮ��ױ�Ϊ��Ӧ��28%,��Ĵ��ʿɴ�84%��

	Service

	�ѱ��Ƽ��
	��ҵ��
	��ù��
	Email Alert
	RSS
	��
	��Ӧϲ
	��

�ؼ���� Ĵ�� ϡ��峬ǿ�� ϳ� �߻�

Abstract�� Pentaerythrityl tetraacetate was synthesized from acetic acid and pentaerythrite,catalyzed by SO_4~(2-)/TiO_2-La_2O_3 rare-earth solid superacid.Various factors affecting the reaction were discussed.Results show that the rare-earth solid superacid SO_4~(2-)/TiO_2-La_2O_3 is an excellent catalyst for the synthesis of pentaerythrityl tetraacetate.The optimum conditions are as follows:the mass ratio of the catalyst(can be resued) to the reactants is 2.5%,the molar ratio of alcohol to acid is 1��8,the reaction time is 90 min,and the amount of water carrying reagent is 15 mL.Under such conditions,the yield of pentaerythrityl tetraacetate can be up to 84%.

Keywords��

Received 2008-11-15; published 2008-11-15

��ñ��:

��Ӧϲ;��;.SO_4~(2-)/TiO_2-La_2O_3�߻��ϳɼ��Ĵ��[J]. ��ѧ��ҵ�빤��, 2008,25(6): 515-518

HU Ying-xi,CHEN Xiao-wei.Synthesis of Pentaerythrityl Tetraacetate Catalyzed by SO_4~(2-)/TiO_2-La_2O_3[J]. Chemcial Industry and Engineering, 2008,25(6): 515-518