TiO2-supported heteropoly acid catalysts for dehydration of methanol to dimethyl ether: relevance of dispersion and support interaction

2015 ◽  
Vol 5 (1) ◽  
pp. 484-491 ◽  
Author(s):  
Rosa María Ladera ◽  
Manuel Ojeda ◽  
José Luis G. Fierro ◽  
Sergio Rojas
Keyword(s):  
Dimethyl Ether ◽  
Heteropoly Acid ◽  
Heteropoly Acids ◽  
Acid Catalysts ◽  
Support Interaction

TiO2-supported heteropoly acids are very active catalysts for DME production from methanol. Due to the interaction with the support, the most active catalysts are obtained when a monolayer of HPA is deposited on the support.

Hydrolysis of Dimethyl Ether over Heteropoly Acids Catalyst

2012 ◽  
Vol 550-553 ◽  
pp. 114-118
Author(s):  
Yong Xiu Li ◽  
Chang Jiang Yu ◽  
Chao Xian Wang ◽  
Longnian Ou ◽  
Yi Bing Song
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Dimethyl Ether ◽  
Phosphotungstic Acid ◽  
Heteropoly Acids ◽  
High Catalytic Activity ◽  
Acid Catalysts ◽  
Different Types ◽  
Super Acid ◽  
Hydrolysis Of

Heteropoly acide(HPA), as one kind of solid-super acid catalysts, has been researched and applied extensively. Using SBA-15 and ZSM-5 as carriers, HPA catalysts with different types and contents were applied in this work for the hydrolysis of dimethyl ether(DME). It had been found that ZSM-5 was a proper carrier, and its supported phosphotungstic acid exhibited relatively high catalytic activity in this low-temperature hydrolysis reaction.

scholarly journals New green perspective to dihydropyridines synthesis utilizing modified heteropoly acid catalysts

2021 ◽  
Author(s):  
Mohamed Mokhtar ◽  
Tamer S. Saleh ◽  
Katabathini Narasimharao ◽  
Ebtesam Al-Mutairi
Keyword(s):  
Heteropoly Acid ◽  
Acid Catalysts

One-Pot Synthesis of 1-Benzoylpyrene over Heteropoly Acid Catalysts

2012 ◽  
Vol 560-561 ◽  
pp. 294-299
Author(s):  
Xiao Qing Lu ◽  
Min Xing ◽  
Ai Xia Pan ◽  
Yin Yin Wu ◽  
Ji Min Xie ◽  
...  
Keyword(s):  
Benzoyl Chloride ◽  
Heteropoly Acid ◽  
Active Catalyst ◽  
Catalytic Synthesis ◽  
Acid Catalysts ◽  
Acylation Reaction ◽  
One Pot ◽  
Experimental Parameters ◽  
Product Separation ◽  
Ft Ir

A novel one-pot catalytic synthesis of 1-benzoylpyrene through acylation of pyrene with benzoyl chloride catalyzed by various Keggin type heteropoly acids (salts) was investigated. Pure 1-benzoylpyrene was obtained and the structure of 1-benzoylpyrene was identified by GC/MS, FT-IR and 1H NMR spectra. H3PW12O40 (PW) was found to be the most active catalyst in the acylation. The yield and the selectivity of 1-benzoylpyrene were up to 97.6 % and 100 %, respectively. The effects of experimental parameters on the catalytic acylation reaction and the recycling performance of PW catalyst were studied. PW catalyst shows well catalytic activity after running for 5 times. The facile product separation and the recycling performance of PW catalyst is expected to contribute to the development of clean and environmentally friendly strategy for the synthesis of 1-benzoylpyrene.

scholarly journals Influence of solid–acid catalysts on steam reforming and hydrolysis of dimethyl ether for hydrogen production

2006 ◽  
Vol 304 ◽  
pp. 40-48 ◽  
Author(s):  
Kajornsak Faungnawakij ◽  
Yohei Tanaka ◽  
Naohiro Shimoda ◽  
Tetsuya Fukunaga ◽  
Shunichiro Kawashima ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Dimethyl Ether ◽  
Steam Reforming ◽  
Solid Acid ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
Hydrolysis Of

Synthesis of Butyl Levulinate Based on α-Angelica Lactone in the Presence of Easily Separable Heteropoly Acid Catalysts

ChemSusChem ◽  
2017 ◽  
Vol 10 (7) ◽  
pp. 1494-1500 ◽  
Author(s):  
Xiaohu Yi ◽  
Mohammad G. Al-Shaal ◽  
Wirawan Ciptonugroho ◽  
Irina Delidovich ◽  
Xiaohong Wang ◽  
...  
Keyword(s):  
Heteropoly Acid ◽  
Acid Catalysts ◽  
Angelica Lactone

Photochromic and photothermal hydrogel derived from natural amino acid and heteropoly acid

Soft Matter ◽  
2021 ◽  
Author(s):  
Xue Wang ◽  
Xiaohuan Liu ◽  
Zhiyuan Ma ◽  
Chuanling Mu ◽  
Wen Li
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Heteropoly Acid ◽  
Acidic Condition ◽  
Heteropoly Acids ◽  
Natural Amino Acid ◽  
Basic Amino Acids

A new kind of supramolecular hydrogels have been designed and synthesized via the co-assembly of basic amino acids (AAs) and heteropoly acids (HPAs) under acidic condition. The formation of gel-like...

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