Versatile boiler ash containing potassium silicate for the synthesis of organic carbonates

In this study, boiler ash containing potassium silicate (BA 900) and potassium silicate (K2SiO3) were proven to be feasible Lewis acid catalysts for the synthesis of different organic carbonates (glycerol carbonate, ethylene carbonate, and propylene carbonate) from different polyol (glycerol, ethylene glycol, and propylene glycol) feedstocks. In addition, the developed catalytic reaction has the ability to produce propylene carbonate at milder reaction temperatures. BA 900 and K2SiO3 were reusable for three consecutive reaction cycles without the loss of activity. The reusable characteristics of catalysts were confirmed through several characterisation techniques, i.e. XRD, FTIR, XRF, N2 physisorption, FESEM-EDX, and Hammett test. All organic carbonates synthesised had a similar synthetic mechanistic pathway, which involved decomposition of intermediate carbamates into their respective carbonates.

[1]  Yuan-xin Wu,et al.  Effect of MgO on the catalytic performance of MgTiO3 in urea alcoholysis to propylene carbonate , 2015 .

[2]  Y. Taufiq-Yap,et al.  Reusable Gypsum Based Catalyst for Synthesis of Glycerol Carbonate from Glycerol and Urea , 2015 .

[3]  B. Hameed,et al.  Synthesis of glycerol carbonate by transesterification of glycerol with dimethyl carbonate over K-zeolite derived from coal fly ash , 2014 .

[4]  M. Yusoff,et al.  An accelerated route of glycerol carbonate formation from glycerol using waste boiler ash as catalyst , 2014 .

[5]  M. Winter,et al.  Vinyl sulfones as SEI-forming additives in propylene carbonate based electrolytes for lithium-ion batteries , 2014 .

[6]  Prabhakar Sharma,et al.  DFT-Assisted Mechanism Evolution of the Carbonylation of Ethylene Glycol to Ethylene Carbonate by Urea over Zn(NCO)2·2NH3 Catalyst , 2013 .

[7]  F. Béguin,et al.  Investigation of methoxypropionitrile as co-solvent for ethylene carbonate based electrolyte in supercapacitors. A safe and wide temperature range electrolyte , 2013 .

[8]  Bolun Yang,et al.  Synthesis of Ethylene Carbonate from Urea and Ethylene Glycol over La(NO3)3 Catalyst , 2012 .

[9]  S. Fredriksen,et al.  Novel solventless purification of poly(propylene carbonate): Tailoring the composition and thermal properties of PPC , 2012 .

[10]  Andreas Lundström,et al.  Urea decomposition and HNCO hydrolysis studied over titanium dioxide, Fe-Beta and γ-Alumina , 2011 .

[11]  S. Musić,et al.  Precipitation of amorphous SiO2 particles and their properties , 2011 .

[12]  M. Aresta,et al.  Converting wastes into added value products: from glycerol to glycerol carbonate, glycidol and epichlorohydrin using environmentally friendly synthetic routes , 2011 .

[13]  M. Aresta,et al.  Valorization of bio-glycerol: New catalytic materials for the synthesis of glycerol carbonate via glycerolysis of urea , 2009 .

[14]  Yanji Wang,et al.  Synthesis of ethylene carbonate from urea and ethylene glycol over zinc/iron oxide catalyst , 2008 .

[15]  Yong Hwan Kim,et al.  Lipase-catalyzed synthesis of glycerol carbonate from renewable glycerol and dimethyl carbonate through transesterification , 2007 .

[16]  Michele Aresta,et al.  A study on the carboxylation of glycerol to glycerol carbonate with carbon dioxide: The role of the catalyst, solvent and reaction conditions , 2006 .

[17]  Yanji Wang,et al.  Synthesis of propylene carbonate from urea and 1,2-propylene glycol over a zinc acetate catalyst , 2004 .

[18]  M. Arai,et al.  Transesterification of urea and ethylene glycol to ethylene carbonate as an important step for urea based dimethyl carbonate synthesis , 2003 .

[19]  M. Arai,et al.  Synthesis of glycerol Carbonate from glycerol and urea using zinc-containing solid catalysts: A homogeneous reaction , 2013 .