Bentonite functionalized with propyl sulfonic acid groups used as catalyst in esterification reactions

被引:41
|
作者
Moraes, D. S. [1 ]
Angelica, R. S. [3 ]
Costa, C. E. F. [2 ]
Rocha Filho, G. N. [2 ]
Zamian, J. R. [2 ]
机构
[1] UFPA, Fac Engn Minas & Meio Ambiente, BR-68505080 Maraba, PA, Brazil
[2] UFPA, Inst Ciencias Exatas & Nat, Lab Catalise & Oleoquim, BR-66075110 Belem, Para, Brazil
[3] UFPA, Inst Geociencias, BR-66075110 Belem, Para, Brazil
关键词
Bentonite; Functionalization; MTPS; Catalysts; Esterification; PILLARED CLAYS; MONTMORILLONITE; ALKYLATION; ADSORPTION; MINERALS; CRACKING;
D O I
10.1016/j.clay.2010.11.018
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The main objective of this work is the functionalization of bentonite from the Amazon (region) by the grafting of propyl sulfonic acid groups to catalyze the esterification reaction of acetic acid and 1-propanol. Functionalization was accomplished by anchoring, oxidation and acid activation of (3-mercaptopropyl) trimethoxysilane, (MTPS). The procedure gave acid properties to the raw bentonite. This material, acting as a catalyst, increased the reaction speed and improved the yield by about 12% compared to the uncatalyzed reaction. The functionalized bentonite was characterized by XRD, TG/DTA, FTIR, N-2 adsorption/desorption at 77 K and XRF, and the surface acidity was determined by titration. (c) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:209 / 213
页数:5
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