Preparation of the WOX/MCM-41 Solid Acid Catalyst and the Catalytic Performance for Solketal Synthesis

Zirconia was synthesized in nanosize by sol-gel method and perchlorated zirconia (HClO4/ZrO2) with various calcination temperatures were prepared and characterized by XRD, FTIR and SEM techniques. The catalyst acidity characters, including the acidicstrength and the total number of acid sites were determined by potentiometric titration. The catalytic performance experiments show that the HClO4/ZrO2 with calcination temperature of 300 °C has the best catalytic activity. 2,3-Dihydroquinazolin-4(1H)-ones wereprepared in good to excellent yields via condensation reaction of oaminobenzamide and various types of aldehydes and ketones in the presence of HClO4/ZrO2 nanoparticles as an efficient solid acid catalyst. The catalyst is reusable with moderate loss in activity.

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ClO 4 − /Al-MCM-41 nanoparticles as a solid acid catalyst for the synthesis of 2-amino-3-cyanopyridines

Research on Chemical Intermediates ◽

10.1007/s11164-015-2183-2 ◽

2015 ◽

Vol 42 (4) ◽

pp. 2867-2881 ◽

Cited By ~ 4

Author(s):

Mohammad Abdollahi-Alibeik ◽

Neda Sadeghi-Vasafi ◽

Ali Moaddeli ◽

Ali Rezaeipoor-Anari

Keyword(s):

Solid Acid ◽

Solid Acid Catalyst ◽

Acid Catalyst ◽

Mcm 41

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Synthesis, Characterization and Catalytic Performance ofH3SiW12O40/SiO2Prepared by Sol-Gel Technique

Journal of Nanotechnology ◽

10.1155/2011/507692 ◽

2011 ◽

Vol 2011 ◽

pp. 1-6 ◽

Cited By ~ 7

Author(s):

W. N. R. W. Isahak ◽

M. Ismail ◽

N. M. Nordin ◽

J. M. Jahim ◽

M. A. Yarmo

Keyword(s):

Heteropoly Acid ◽

Solid Acid ◽

Solid Acid Catalyst ◽

Sol Gel ◽

Acid Catalyst ◽

Catalytic Performance ◽

Environmentally Benign ◽

Esterification Reaction ◽

Silicotungstic Acid ◽

Gel Technique

The purpose of this work is to study the synthesis, characterization, and catalytic performance of two types of solid heteropoly acid catalysts, namely, silicotungstic acid bulk (STAB) and STA-silica sol-gel (STA-SG) compared with sulfuric acid. From the XPS analyses, there was a significant formation of W-O-Si, W-O-W, and Si-O-Si bonding in STA-SG compared to that in STAB. The main spectra of O1s (90.74%, 531.5 eV) followed by other O1s peak (9.26%, 532.8 eV) were due to the presence of W-O-W and W-O-Si bonds, respectively. The STA-SG catalyst was found to be the more environmentally benign solid acid catalyst for the esterification reaction between oleic acid and glycerol due to its lower toxicity supported by silica via sol-gel technique. In addition, the ease of separation for STA-SG catalyst was attributed to its insoluble state in the product phase. The esterification products were then analysed by FTIR and HPLC. Both the H2SO4and the STAB gave high conversion of 100% and 98% but at a lower selectivity of GME with 81.6% and 89.9%, respectively. On the contrary, the STA-SG enabled a conversion of 94% but with a significantly higher GME selectivity of 95%, rendering it the more efficient solid acid catalyst.

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Synthesis and characterization of copper (II)-poly(acrylic acid)/M-MCM-41 nanocomposite as a novel mesoporous solid acid catalyst for the one-pot synthesis of polyhydroquinoline derivatives

Polyhedron ◽

10.1016/j.poly.2019.114294 ◽

2020 ◽

Vol 176 ◽

pp. 114294 ◽

Cited By ~ 2

Author(s):

Shahla Vaysipour ◽

Zahra Rafiee ◽

Masoud Nasr-Esfahani

Keyword(s):

Acrylic Acid ◽

Solid Acid ◽

Solid Acid Catalyst ◽

Acid Catalyst ◽

Synthesis And Characterization ◽

One Pot ◽

One Pot Synthesis ◽

The One ◽

Mcm 41

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Synthesis of Sulfonic Acid-Functionalized Zirconium Poly(Styrene-Phenylvinyl-Phosphonate)-Phosphate for Heterogeneous Epoxidation of Soybean Oil

Catalysts ◽

10.3390/catal9090710 ◽

2019 ◽

Vol 9 (9) ◽

pp. 710 ◽

Cited By ~ 1

Author(s):

Xiaochuan Zou ◽

Xuyuan Nie ◽

Zhiwen Tan ◽

Kaiyun Shi ◽

Cun Wang ◽

...

Keyword(s):

Catalytic Activity ◽

Soybean Oil ◽

Sulfonic Acid ◽

Solid Acid ◽

Solid Acid Catalyst ◽

Acid Catalyst ◽

Thiol Group ◽

Catalytic Performance ◽

X Ray ◽

Sulfonic Acid Groups

In this paper, a solid acid catalyst (ZPS–PVPA–SO3H) was prepared by anchoring thiol group on zirconium poly(styrene-phenylvinyl-phosphonate)-phosphate (ZPS–PVPA), followed by oxidation of thiol groups to obtain sulfonic acid groups. The solid acid catalyst was characterized by XPS, X-ray, EDS, SEM, and TG-DSC. The successful preparation of sulfonic acid-functionalized ZPS–PVPA was confirmed. Subsequently, the catalytic performance of ZPS–PVPA–SO3H was investigated in the epoxidation of soybean oil. The results demonstrated that ZPS–PVPA–SO3H can effectively catalyze epoxidation of soybean oil with TBHP as an oxidant. Moreover, there was no significant decrease in catalytic activity after 5 repeated uses of the ZPS–PVPA–SO3H. Interestingly, the ZPS–PVPA–SO3H was kept in 2 mol/L of HCl overnight after the end of the seventh reaction, and the catalytic activity was gradually restored during the eighth to tenth cycles.

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Ceric Ion Loaded MCM-41 Catalyzed Synthesis of Substituted Mono- and Bis-dihydropyrimidin-2(1H)-ones

Journal of Catalysts ◽

10.1155/2013/819184 ◽

2013 ◽

Vol 2013 ◽

pp. 1-8 ◽

Cited By ~ 2

Author(s):

Pullar Vadivel ◽

Rathinam Ramesh ◽

Appaswami Lalitha

Keyword(s):

Solid Acid ◽

Solid Acid Catalyst ◽

Acid Catalyst ◽

Aromatic Aldehydes ◽

One Pot ◽

Solvent Free Condition ◽

Three Component Reaction ◽

High Yields ◽

Work Up ◽

Mcm 41

An effective one-pot three-component reaction of aromatic aldehydes with 1,3-diketone and urea or thiourea under solvent-free condition leads to the formation of mono- and bis-dihydropyrimidin-2-(1H)-ones using Ce-MCM-41 as a recyclable solid acid catalyst. This method has several advantages like simple and easy work-up with shorter reaction time, reusability of catalyst, and high yields of Biginelli products.

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