scholarly journals The Acid Strength and the Catalytic Activity of Solid Catalysts in the Oligomerization of Propylene

1967 ◽  
Vol 40 (1) ◽  
pp. 42-49 ◽  
Author(s):  
Makoto Misono ◽  
Yukio Yoneda
Keyword(s):  
Catalytic Activity ◽  
Acid Strength ◽  
Solid Catalysts

Preparation of Strong Acid Catalysts by Sulfate Treatment of Calcined Boehmite

1992 ◽  
Vol 57 (11) ◽  
pp. 2241-2247 ◽  
Author(s):  
Tomáš Hochmann ◽  
Karel Setínek
Keyword(s):  
Catalytic Activity ◽  
Surface Area ◽  
Aluminum Sulfate ◽  
Solid Acid ◽  
Strong Acid ◽  
Acid Strength ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
Preparation Methods ◽  
Indicator Method

Solid acid catalysts with acid strength of -14.52 < H0 < -8.2 were prepared by sulfate treatment of the samples of boehmite calcined at 105-800 °C. Two preparation methods were used: impregnation of the calcined boehmite with 3.5 M H2SO4 or mixing of the boehmite samples with anhydrous aluminum sulfate, in both cases followed by calcination in nitrogen at 650 °C. The catalysts were characterized by measurements of surface area, adsorption of pyridine and benzene, acid strength measurements by the indicator method and by catalytic activity tests in the isomerization of cyclohexene, p-xylene and n-hexane. Properties of the catalysts prepared by both methods were comparable.

scholarly journals Synthesis and Properties of Lanthanide-Exchanged Preyssler's Heteropolyanions

1994 ◽  
Vol 368 ◽  
Author(s):  
Mark R. Antonio ◽  
J. Malinsky ◽  
L. Soderholm
Keyword(s):  
Catalytic Activity ◽  
Homogeneous Solution ◽  
Potential Significance ◽  
Lanthanide Ion ◽  
Solid Catalysts ◽  
New Class ◽  
Trivalent Lanthanide ◽  
Heterogeneous Solid

ABSTRACTNa+ in the Preyssler heteropolytungstate anion [NaP5W30O110]14− can be exchanged for a trivalent lanthanide ion. The potential significance of this new class of lanthanide heteropolyanions relates to their applications in catalysis science. This view follows from the fact that Keggin heteropolyanions and their free acids are used as heterogeneous solid catalysts and homogeneous solution catalysts. We describe synthetic conditions that lead to the incorporation of Ce3+ and Pr3+ within the Preyssler anion, and the coprecipitation of Ce3+ and the Preyssler anion. Initial studies indicate that the latter, coprecipitated, material deserves study for bifunctional catalytic activity.

Determination of the acid strength of solid catalysts in water by means of a kinetic tracer

1996 ◽  
Vol 112 (1) ◽  
pp. 133-141 ◽  
Author(s):  
Claude Moreau ◽  
Robert Durand ◽  
Patrick Geneste ◽  
Samir Mseddi
Keyword(s):  
Acid Strength ◽  
Solid Catalysts

MZ Solid Catalysts for Synthesis of 1-Methoxy-2-Propanol with High Selectivity

2012 ◽  
Vol 616-618 ◽  
pp. 1717-1720
Author(s):  
Yong Jie Wang ◽  
Mu Zhang
Keyword(s):  
Catalytic Activity ◽  
Alkali Metal ◽  
Propylene Oxide ◽  
Oxide Catalyst ◽  
High Selectivity ◽  
Catalyst Activity ◽  
Complex Oxide ◽  
Solid Catalysts ◽  
New Type ◽  
Selective Access

This document explains and demonstrates the problem of Methanol and propylene oxide propoxylation, ZrO2 load active alkali metal oxides MgO the catalytic propoxylation method, analyzed a new type of catalyst activity and selectivity. The results show that the synthesis of MZ complex oxide as a catalyst for the reaction of Methanol substrate, through the catalytic reaction of propylene oxide, selective access to the propylene glycol ether, High selectivity synthesis 1-Methoxy-2-propanol. Synthesis of complex oxide catalyst MZ series in the course of the performance of the primary ether good selectivity, Primary ether, second ether ratio greater than 12, and the catalytic activity is also high (about 91% of all).

Effect of different metal oxides on the catalytic activity of γ-Al2O3–MgO supported bifunctional heterogeneous catalyst in biodiesel production from WCO

RSC Advances ◽  
2016 ◽  
Vol 6 (2) ◽  
pp. 872-881 ◽  
Author(s):  
Muhammad Farooq ◽  
Anita Ramli ◽  
Abdul Naeem ◽  
Muhammad Saleem khan
Keyword(s):  
Catalytic Activity ◽  
Metal Oxides ◽  
Heterogeneous Catalyst ◽  
Waste Cooking Oil ◽  
Biodiesel Production ◽  
Solid Catalysts ◽  
Cooking Oil

The catalytic activity of different γ-Al2O3–MgO supported bifunctional solid catalysts was successfully evaluated by carrying out simultaneous esterification–transesterification in waste cooking oil.

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