scholarly journals Application of magnetic superacid catalyst in synthesis of 2-methylanthraquinone

2020 ◽  
Vol 545 ◽  
pp. 012013
Author(s):  
Xiang Li ◽  
Rui Yang ◽  
Detang Wang ◽  
Gan Li ◽  
Meixia Zhao
Keyword(s):  
Superacid Catalyst

Direct Synthesis of 3,5-Dinitropyrazole Catalyzed by Newly Sulfated Nanosolid Superacid TiO2/ SO

2011 ◽  
Vol 391-392 ◽  
pp. 1296-1301
Author(s):  
Li Min Xi ◽  
Xin Xin Zhang
Keyword(s):  
Direct Synthesis ◽  
Sol Gel ◽  
Acid Base ◽  
Direct Transformation ◽  
Acid Base Titration ◽  
Optimal Reaction Condition ◽  
Superacid Catalyst ◽  
Average Size ◽  
Optimal Reaction ◽  
Xrd And Tem

The newly sulfated nanosolid superacid TiO2/SO4 prepared by sol-gel method was broadly characterized by acid base titration, XRD and TEM, which identified that the superfine solid TiO2/SO4 showing good dispersibility with average size of 27 nm belongs to kind of crystalline nanoparticles. With the help of the catalyst TiO2/SO4, the optimal reaction condition for direct transformation of pyrazole and nitrosonitric acid into 3, 5-Dinitropyrazole was n (pyrazol)=0.10 mol, m (TiO2/SO4 )＝1.5g, V(n-octannol)＝90mL, and V(nitrosonitric acid)＝50mL. Moreover, the optimal yield of the catalytic reaction reached up to 59.4% when the reaction time is 7 hours. The nanosolid superacid catalyst is still of high activity after regenerating eight times by calcination at 600。C.

The Study on Solid Superacid Synthesis of K12A with Manufacturing Equipment

2012 ◽  
Vol 583 ◽  
pp. 285-288
Author(s):  
Dong Mei Zhao ◽  
Xue Peng Liu
Keyword(s):  
Catalytic Activity ◽  
Metal Oxide ◽  
Design Method ◽  
Orthogonal Design ◽  
Manufacturing Equipment ◽  
Solid Superacid ◽  
Orthogonal Design Method ◽  
Superacid Catalyst ◽  
Calcined Temperature ◽  
Very High

By orthogonal design method, Catalytic activity of /ZrO2 solid superacid is studied, and the influence of catalyst characteristic and structure by manufacturing equipment is issued. It is concluded that the best prepared conditions of the superacid catalyst /ZrO2 for the synthesis of Octyl-Polyglycoside are followed:(1) PH=9.5; (2) calcined temperature at 500; (3) M(H2SO4)=0.5mol/L. Using this kind of catalyst the conversion of glueoside may reach as high as 96% in the synthesis of OCtyl-Polyglycoside and the selectivity is very high for the synthesis of Octyl-Polyglycoside. By introducing other metal oxide, the catalytic activity of complex solid superacid is studied.

Synthesis of SO42−/ZrO2/MCM-41 as a new superacid catalyst

2000 ◽  
pp. 2229-2230 ◽  
Author(s):  
Q.-H. Xia ◽  
K. Hidajat ◽  
S. Kawi
Keyword(s):  
Superacid Catalyst ◽  
Mcm 41

Synthesis of Bioactive 1,4‐DHPs Using Sulfated Tin Oxide as an Efficient Solid Superacid Catalyst

2021 ◽  
Vol 400 (1) ◽  
pp. 2100056
Author(s):  
Raju Kagne ◽  
Sandeep Niwadange ◽  
Virbhadra Kalalawe ◽  
Gopinath Khansole ◽  
Dashrath Munde
Keyword(s):  
Tin Oxide ◽  
Solid Superacid ◽  
Superacid Catalyst ◽  
Solid Superacid Catalyst

The use of sulfated tin oxide as solid superacid catalyst for heterogeneous transesterification of Jatropha curcas oil

2010 ◽  
Vol 64 (6) ◽  
Author(s):  
Gerald Kafuku ◽  
Keat Lee ◽  
Makame Mbarawa
Keyword(s):  
Tin Oxide ◽  
Jatropha Curcas ◽  
Methyl Esters ◽  
Solid Catalyst ◽  
Reaction Conditions ◽  
Jatropha Curcas Oil ◽  
Biodiesel Standards ◽  
Superacid Catalyst ◽  
Astm D6751 ◽  
Central Composite

AbstractThis work presents the use of sulfated tin oxide enhanced with SiO2 (SO42−/SnO2-SiO2) as a superacid solid catalyst to produce methyl esters from Jatropha curcas oil. The study was conducted using the design of experiment (DoE), specifically a response surface methodology based on a threevariable central composite design (CCD) with α = 2. The reaction parameters in the parametric study were: reaction temperature (60°C to 180°C), reaction period (1 h to 3 h), and methanol to oil mole ratio (1: 6 to 1: 24). Production of the esters was conducted using an autoclave nitrogen pressurized reactor equipped with a thermocouple and a magnetic stirrer. The maximum methyl esters yield of 97 mass % was obtained at the reaction conditions: temperature of 180°C, reaction period of 2 h, and methanol to oil mole ratio of 1: 15. The catalyst amount and agitation speed were fixed to 3 mass % and 350–360 min−1, respectively. Properties of the methyl esters obtained fell within the recommended biodiesel standards such as ASTM D6751 (ASTM, 2003).

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