"Fishing" of heteropolyacids into carbonaceous seine via coking.

The carbon encapsulated tungstophosphoric acid was synthesized by the controlled coking during gas phase reaction of formaldehyde with isobutene. The as-made material showed unique stability toward leaching in the aqueous phase due to localization of HPA clusters inside the porous coke matrix with high activity in the esterification reaction.

[1]  V. Ordomsky,et al.  Catalysis by coke deposits: synthesis of isoprene over solid catalysts. , 2013, Angewandte Chemie.

[2]  V. Ordomsky,et al.  Synthesis of isoprene from formaldehyde and isobutene over phosphate catalysts , 2012 .

[3]  Kangnian Fan,et al.  A green process for the epoxidation of dicyclopentadiene with aqueous H2O2 over highly efficient and stable HPW-NH2-SBA-15 , 2012 .

[4]  A. Wolfson,et al.  Immobilization of molecular H3PW12O40 heteropolyacid catalyst in alumina-grafted silica-gel and mesostructured SBA-15 silica matrices , 2005 .

[5]  A. Lapkin,et al.  Preparation and characterisation of chemisorbents based on heteropolyacids supported on synthetic mesoporous carbons and silica , 2003 .

[6]  R. Gómez,et al.  Thermally Induced Phase Transformation on 12-Tungstophosphoric Acid/ZrO2 Sol-Gel , 2003 .

[7]  P. Vázquez,et al.  Mo and W heteropolyacid based catalysts applied to the preparation of flavones and substituted chromones by cyclocondensation of o-hydroxyphenyl aryl 1,3-propanediones , 2002 .

[8]  M. Misono,et al.  Epitaxially Self-Assembled Aggregates of Polyoxotungstate Nanocrystallites, (NH4)3PW12O40: Synthesis by Homogeneous Precipitation Using Decomposition of Urea , 2001 .

[9]  M. Misono.  Unique acid catalysis of heteropoly compounds(heteropolyoxometalates) in the solid state , 2001 .

[10]  K. Sano,et al.  A new process for acetic acid production by direct oxidation of ethylene , 1999 .

[11]  T. Nakato,et al.  Organic reactions in excess water catalyzed by solid acids , 1998 .

[12]  M. Blanco,et al.  Acid catalysts prepared by impregnation of tungstophosphoric acid solutions on different supports , 1998 .

[13]  M. Misono,et al.  Strong influence of the polyanion structure on the secondary structure of solid heteropolyacids and their catalytic activity; methyl tert-butyl ether synthesis in the pseudo-liquid phase of heteropolyacids , 1998 .

[14]  I. Kozhevnikov.  Heteropoly Acids and Related Compounds as Catalysts for Fine Chemical Synthesis , 1995 .

[15]  R. Gobetto,et al.  Solid state NMR and IR studies of phosphomolybdenum and phosphotungsten heteropoly acids supported on SiO2, γ-Al2O3, and SiO2Al2O3 , 1989 .

[16]  E. Breitmaier,et al.  Carbon-13 NMR Spectroscopy: High-Resolution Methods and Applications in Organic Chemistry and Biochemistry , 1986 .