Document Detail


Acidic cesium salts of 12-tungstophosphoric acid as catalysts for the dehydration of xylose into furfural.
MedLine Citation:
PMID:  17081510     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Cesium salts of 12-tungstophosphoric acid, Cs(x)H(3-x)PW(12)O(40) (Cs(x)PW), in the bulk form or supported on medium-pore MCM-41 (3.7 nm) or large-pore (9.6 nm) micelle-templated silicas are active solid acid catalysts for the cyclodehydration of xylose into furfural, in a toluene/water solvent system (T/W) or in dimethyl sulfoxide (DMSO). The catalytic results are comparable to those obtained using sulfuric acid, under similar reaction conditions. The initial activities increase in the order H(3)PW(12)O(40)<Cs(2.0)PW<Cs(2.5)PW<silica-supported CsPW catalysts (15, 34wt% PW). Higher HPA loadings, larger pore diameter of the parent silica support, and higher reaction temperatures lead to higher furfural yields. The stability and reusability of the MCM-41-supported CsPW is higher in DMSO than in T/W.
Authors:
Ana S Dias; Sérgio Lima; Martyn Pillinger; Anabela A Valente
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-10-17
Journal Detail:
Title:  Carbohydrate research     Volume:  341     ISSN:  0008-6215     ISO Abbreviation:  Carbohydr. Res.     Publication Date:  2006 Dec 
Date Detail:
Created Date:  2006-11-27     Completed Date:  2007-02-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0043535     Medline TA:  Carbohydr Res     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  2946-53     Citation Subset:  IM    
Affiliation:
Department of Chemistry, CICECO, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.
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MeSH Terms
Descriptor/Qualifier:
Catalysis
Cesium / chemistry
Desiccation
Dimethyl Sulfoxide
Furaldehyde / chemical synthesis*
Kinetics
Phosphoric Acids / chemistry*
Solvents
Tungsten Compounds / chemistry*
X-Ray Diffraction
Xylose / chemistry*
Chemical
Reg. No./Substance:
0/Phosphoric Acids; 0/Solvents; 0/Tungsten Compounds; 0/Xylose; 67-68-5/Dimethyl Sulfoxide; 7440-46-2/Cesium; 98-01-1/Furaldehyde

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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