furfural formation

Acetic Acid Enthalpy of Formation

1 2] enthalpy of formation based on version 1 118 of the Thermochemical Network This version of ATcT results was partially described in Ruscic et al [] and was also used for the initial development of high-accuracy ANLn composite electronic structure methods []

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Degradation of cellulosic insulation in power

Degradation of cellulosic insulation in power transformers Part 2: Formation of furan products in insulating oil Access Full Text Degradation of cellulosic insulation in power transformers Part 2: Formation of furan products in insulating oil Author(s): A M Emsley X Xiao R J Heywood M Ali DOI: 10 1049/ip-smt:20000259 For access to this article please select a purchase option

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Chloride ions enhance furfural formation from D

Chloride ions enhance furfural formation from D-xylose in dilute aqueous acidic solutions Research output: Contribution to journal › Article › Scientific › peer-review Energy Technology Overview Cite this G Marcotullio W de Jong Original language: English: Pages (from-to) 1739-1746: Number of pages: 8: Journal: Green Chemistry: Volume : 2010-12: Issue number: 10: Publication

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of furfural

These reactions show that three water molecules are formed along with the formation of one molecule of furfural (2-FAL) pcl-ilgen de pcl-ilgen de Zieht man eine Stoffbilanz dieser Reaktionen so wird deutlich dass bei der Bildung eines Molekles Furfurol (2-FAL) auch drei Wassermolekle entstehen pcl-ilgen de pcl-ilgen de The risk assessment has identified other sources of furfural

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Differential Catalysis of Depolymerisation and Dehydration

Furfural formation from birch wood pentosans has been studied while changing the concentration of the sulfuric acid catalyst from 10% to 90% and while using the same amount of sulfuric acid and decreasing the volume of water As a result of using concentrated sulfuric acid as a catalyst the chemical mechanisms of the depolymerisation and dehydration reactions during the furfural formation

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ISO

Ethanol for industrial use — Methods of test — Part 11: Test for detection of furfural Buy this standard This standard was last reviewed and confirmed in 2018 Therefore this version remains current Abstract Preview The principle consists in the treatment of a test portion with aniline and acetic acid the presence of furfural leading to the formation of a characteristic red colour

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Gao et al Afr J Tradit Complement Altern Med (2015) 12

HYDROXYMETHYL FURFURAL IN CHINESE HERBAL MEDICINES: ITS FORMATION PRESENCE METABOLISM BIOACTIVITIES AND IMPLICATIONS Hui-feng Gao1 Xue-sen Wen1* Cory J Xian2 1Institute of Pharmacognosy School of Pharmaceutical Sciences Shandong University Jinan 250012 China 2Sansom Institute for Health Research School of Pharmacy and Medical Sciences University

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Furfural

Omel'chenko F S Specific heat of furfural Izv Vyssh Ucheb Zaved Pishch Tekhnol 1962 No 2 151-152 von Reis 1881 von Reis M Enthalpy of formation of liquid at standard conditions: Data from NIST Standard Reference Database 69: NIST Chemistry WebBook The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database

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Highly selective hydrogenation of furfural over supported

The selective liquid phase hydrogenation of furfural to furfuryl alcohol over Pt nanoparticles supported on SiO2 ZnO gamma-Al2O3 CeO2 is reported under extremely mild conditions Ambient hydrogen pressure and temperatures as low as 50 degrees C are shown sufficient to drive furfural hydrogenation with high conversion and 99% selectivity to furfuryl alcohol

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furfural

furfural Peer Reviewed Yes (1) Source OnePetro (6) Date Earlier than January 2015 (6) to Go SPE Disciplines Highlight matches Any in SPE Disciplines (6) Journal Corrosion (1) Conference 10th World Petroleum Congress (1) 15th World Petroleum Congress (1) 3rd World Petroleum Congress (2) 5th World Petroleum Congress (1) Publisher

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Ameur LA Mathieu O Lalanne V Trystram G Birlouez

Ameur LA Mathieu O Lalanne V Trystram G Birlouez-Aragon I Comparison of the effects of sucrose and hexose on furfural formation and browning in cookies baked at different temperatures Food Chem 101: 1407-16 2007 has been cited by the following article: Article Influence of Cookies Formulation on the Formation of Acrylamide Wen Chieh Sung 1 Chih Ya Chen 1 1 Department of Food

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Chloride ions enhance furfural formation from D

Chloride ions enhance furfural formation from D-xylose in dilute aqueous acidic solutions Research output: Contribution to journal › Article › Scientific › peer-review Energy Technology Overview Cite this G Marcotullio W de Jong Original language: English: Pages (from-to) 1739-1746: Number of pages: 8: Journal: Green Chemistry: Volume : 2010-12: Issue number: 10: Publication

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Mt DISTILLATION Of THE FURFURAL

by the formation of an azeotrope at a 35 percent furfural content it nevertheless is possible to separate pure furfural by distillation at atmospheric pressure This is due to the partially miscible liquid system formed by condensing vapors that contain more than 18 1 per-cent furfural and the accompanying enrichment that takes place in

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Identification and characterization of the furfural and 5

The toxic fermentation inhibitors in lignocellulosic hydrolysates pose significant problems for the production of second-generation biofuels and biochemicals Among these inhibitors 5-(hydroxymethyl)furfural (HMF) and furfural are specifically notorious In this study we describe the complete molecular identification and characterization of the pathway by which Cupriavidus basilensis

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pentose to furfural form

FURFURAL FORMATION - Journal of the Abstract: The role of molecular structure on pentose dehydration to furfural has been examined using HCl as a Brnsted acid catalyst in a single phase aqueous media It is shown that xylulose dehydration results in a much higher furfural yield than xylose Pentose Jump to navigation Jump to search A pentose is a monosaccharide with five

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Furfural

Furfural formation through cyclic form of xylose Furfural has two major functional groups an aldehyde (CHO) and two olefin groups (CH CH) and is a versatile compound for many applications The various reactions such as acylation acetylation reductive amination to amines reduction to alcohols decarboxylation oxidation to carboxylic acids Grignard reactions and aldol and Knoevenagel

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Selective Conversion of Biomass Hemicellulose to Furfural

Maleic acid has interesting properties versus other organic and mineral acids in furfural formation The use of maleic acid as a catalyst in biomass conversion has the benefit in comparison to the use of other acids (mineral/organic) due to the efficient conversion of solid xylans to xylose at high yields in aqueous solution at the reasonably mild temperature of 160 C

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Furan synthesis

A mild oxidation of alkyl enol ethers to enals employs low loadings of a palladium catalyst and tolerates a diverse array of functional groups while allowing the formation of di- tri- and tetrasubtituted olefins The application of this methodology to intramolecular reactions of alkyl enol ethers containing pendant alcohols provides furan and 2 5-dihydrofuran products

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Tests for specific carbohydrates: Seliwanoff's test Bial

Tests for specific carbohydrates: Seliwanoff's test Bial's test and Iodine test 1 Seliwanoff's test: Principle reagents procedure and result Principle of Seliwanoff's test: Seliwanoff's test is used to distinguish aldoses from ketoses On treatment with conc Acid ketoses are dehydrated more rapidly to give furfural derivatives and on condensation with resorcinol give cherry red

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Furfural and 5

furfural (frompentoses) and 5-hydroxylmethyl furfural (from hexoses) are formed in high concentrations during severe acidic pretreatment conditions (Taherzadeh et al 1997) The formation of inhibitors and consequently of toxic compounds is a problem that has a negative fallout on the rate of enzymatic hydrolysis Table 1 summarizes

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Some aspects of the mechanism of formation of smoke

The reactions leading to soot formation were modelled It was concluded that wood soot formation proceeded via pyrolytic breakdown followed by a mechanism based on HACA (hydrogen abstraction carbon addition) reactions with the participation of cyclopentadienyl intermediates while eugenol soot originated predominantly through the CPDyl route The formation of furfural soot is mainly via HACA

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Hydroxymethylfurfural – Wikipedia

Hydroxymethylfurfural HMF oder 5-(Hydroxymethyl)furfural auch 5-Oxymethylfurfurol ist eine Aldehyd- und Furanverbindung die sich bei der thermischen Zersetzung von Zucker oder Kohlenhydraten bildet HMF kann in vielen mit Hitze behandelten Lebensmitteln einschlielich Milch Fruchtsaft alkoholischen Getrnken Honig usw nachgewiesen werden

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THERMAL KINETIC STUDY OF COLOR CHANGES AND 5

Effect of different thermal treatments on formation of 5-hydroxymethyl furfural (5-HMF) and its relation with nonenzymatic browning of litchi juice (cv Huaizhi) were studied The results showed that the rate of change in browning index (A 420 ) and formation of 5-HMF followed a first-order kinetic pattern when heated under 60 70 80 90 and 98C for a prolonged period of 5h

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Changes in the Birch Wood Lignocellulose Composition in

Chemical mechanism of furfural formation In this case the mechanism of obtaining furfural is more complicated (Fig 5) As a result of condensation polymerization and other secondary reactions we have in industry the furfural yield no more than 50% from theoretically possible Fig 5 Furfural obtaining mechanism The joint production of bioethanol and furfural is much more economically

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