scholarly journals Aroylation of aromatics with aryl carboxylic acids over Nafion-H (polymeric perfluoroalkanesulfonic acid), an environmentally friendly solid acid catalyst

ARKIVOC ◽  
2005 ◽  
Vol 2004 (8) ◽  
pp. 103-110
Author(s):  
G. K. Surya Prakash ◽  
Thomas Mathew ◽  
Mihirbaran Mandal ◽  
Morteza Farnia ◽  
George A. Olah
Keyword(s):  
Carboxylic Acids ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Environmentally Friendly ◽  
Acid Catalyst

scholarly journals A green, reusable and highly efficient solid acid catalyst for the oxidation of aldehydes to the corresponding carboxylic acids using H2O2 and KMnO4: H5PV2Mo10O40 (10-molybdo-2-vanadophosphoric heteropolyacid)

2011 ◽  
Vol 76 (11) ◽  
pp. 1513-1522 ◽  
Author(s):  
Abdollah Shojaei ◽  
Ali Rezvani ◽  
Majid Heravi
Keyword(s):  
Hydrogen Peroxide ◽  
Carboxylic Acids ◽  
Relative Stability ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Aromatic Aldehydes ◽  
Practical Method ◽  
Mild Conditions ◽  
Catalyzed Oxidation

H5PV2Mo10O40-catalyzed oxidation of aromatic aldehydes to the corresponding carboxylic acids using hydrogen peroxide and KMnO4 as oxidants under mild conditions is reported. This system provides an efficient, convenient and practical method for the oxidation of aromatic aldehydes. In this work, differences between Keggin and Dawson type polyoxometalates are addressed in term of relative stability, hardness and acidity.

Biomass derived β-cyclodextrin-SO3H as a solid acid catalyst for esterification of carboxylic acids with alcohols

RSC Advances ◽  
2015 ◽  
Vol 5 (17) ◽  
pp. 12981-12986 ◽  
Author(s):  
Raju S. Thombal ◽  
Amol R. Jadhav ◽  
Vrushali H. Jadhav
Keyword(s):  
Carboxylic Acids ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Solvent Free ◽  
Highly Efficient ◽  
Carbon Based

A novel b-cyclodextrin-SO3H carbon based solid acid catalyst was prepared and proved highly efficient in solvent free esterification of carboxylic acids with alcohols. The catalyst was easily recovered and reused without any impact on the yields.

scholarly journals Influence of alkyl chain length on sulfated zirconia catalysed batch and continuous esterification of carboxylic acids by light alcohols

2016 ◽  
Vol 18 (20) ◽  
pp. 5529-5535 ◽  
Author(s):  
Amin Osatiashtiani ◽  
Lee J. Durndell ◽  
Jinesh C. Manayil ◽  
Adam F. Lee ◽  
Karen Wilson
Keyword(s):  
Liquid Phase ◽  
Carboxylic Acids ◽  
Chain Length ◽  
Sulfated Zirconia ◽  
Solid Acid ◽  
Alkyl Chain ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Alkyl Chain Length ◽  
Highly Dispersed

Sulfated zirconia in pure and highly dispersed form is a tunable and effective solid acid catalyst for the batch and continuous liquid phase esterification of carboxylic acids.

scholarly journals Catalysis of glycerol acetylation on solid acid catalyst: a review

2021 ◽  
Vol 23 (12) ◽  
pp. 414-423 ◽  
Author(s):  
Nur Hidayati ◽  
Rahmah Puspita Sari ◽  
Herry Purnama
Keyword(s):  
Side Effect ◽  
Heterogeneous Catalysts ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Environmentally Friendly ◽  
Acid Catalyst ◽  
Total Weight ◽  
Chemical Production

Biodiesel is a substitute fuel that is environmentally friendly, biodegradable, and sustainable. The need for biodiesel continues to increase. Biodiesel is made through the process of transesterification of triglycerides and alcohol. Glycerol is a side-effect of biodiesel products with a capacity of 10% of the total weight of its production. Glycerol is the simplest glyceride compound and has several functions as a primary ingredient in chemical production. Through acetylation, glycerol is converted to a material that has a higher sale value. Both homogeneous and heterogeneous catalysts are the acetylation approach to achieve the desired product, namely acetyl glycerol esters (mono-, di- and triacetin). However, in the process, the catalyst’s type and characteristics significantly affect the yield and conversion of the product and the deactivation or reusability of the catalyst, which can inhibit the catalyst’s utilization and effectiveness; therefore, it must be studied further. Besides, the parameters that affect the reaction will also be assessed.

Corncob lignocellulose for the production of furfural by hydrothermal pretreatment and heterogeneous catalytic process

RSC Advances ◽  
2015 ◽  
Vol 5 (74) ◽  
pp. 60264-60272 ◽  
Author(s):  
Aojie Deng ◽  
Junli Ren ◽  
Huiling Li ◽  
Feng Peng ◽  
Runcang Sun
Keyword(s):  
Heterogeneous Catalysis ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Environmentally Friendly ◽  
Acid Catalyst ◽  
Hydrothermal Pretreatment ◽  
Heterogeneous Catalytic Process ◽  
Step Process ◽  
Heterogeneous Catalytic ◽  
Furfural Production

In this paper, an environmentally-friendly two-step process for furfural production was developed by the hydrothermal pretreatment of corncob and the heterogeneous catalysis of the hydrolysate using a solid acid catalyst.

Synthesis and Characterization of Heterogeneous Solid Acid Catalyst from Alstonia Scolaris Stalks for Biodiesel Production using Waste Cooking Oil

2020 ◽  
Vol 10 ◽  
Author(s):  
Charishma Venkata Sai Anne ◽  
Karthikeyan S. ◽  
Arun C.
Keyword(s):  
Reaction Time ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Waste Cooking Oil ◽  
Biodiesel Production ◽  
Wood Biomass ◽  
Waste Wood ◽  
X Ray ◽  
Cooking Oil

Background: Waste biomass derived reusable heterogeneous acid based catalysts are more suitable to overcome the problems associated with homogeneous catalysts. The use of agricultural biomass as catalyst for transesterification process is more economical and it reduces the overall production cost of biodiesel. The identification of an appropriate suitable catalyst for effective transesterification will be a landmark in biofuel sector Objective: In the present investigation, waste wood biomass was used to prepare a low cost sulfonated solid acid catalyst for the production of biodiesel using waste cooking oil. Methods: The pretreated wood biomass was first calcined then sulfonated with H2SO4. The catalyst was characterized by various analyses such as, Fourier-transform infrared spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (EDS) and X-ray diffraction (XRD). The central composite design (CCD) based response surface methodology (RSM) was applied to study the influence of individual process variables such as temperature, catalyst load, methanol to oil molar ration and reaction time on biodiesel yield. Results: The obtained optimized conditions are as follows: temperature (165 ˚C), catalyst loading (1.625 wt%), methanol to oil molar ratio (15:1) and reaction time (143 min) with a maximum biodiesel yield of 95 %. The Gas chromatographymass spectrometry (GC-MS) analysis of biodiesel produced from waste cooking oil was showed that it has a mixture of both monounsaturated and saturated methyl esters. Conclusion: Thus the waste wood biomass derived heterogeneous catalyst for the transesterification process of waste cooking oil can be applied for sustainable biodiesel production by adding an additional value for the waste materials and also eliminating the disposable problem of waste oils.

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