Extractives fom <i>Cedar Deodara</i> and <i>Alnus Cordata</i> in the Presence of Molybdenum Catalysts

Mecca, Marisabel; Todaro, Luigi; D’Auria, Maurizio

doi:10.1002/slct.201700095

Cited by 5 publications

(4 citation statements)

References 22 publications

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“…Recently, a new procedure was reported for increasing the extractive yields during both ethanol/toluene Soxhlet extraction and under water extraction in an autoclave. This new procedure uses MoO 3 supported on silica, and H 3 PMo 12 O 40 , a polyoxometalate compound, as a catalyst [14,38].…”

Section: Catalystsmentioning

confidence: 99%

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Extraction Methods and Their Influence on Yield When Extracting Thermo-Vacuum-Modified Chestnut Wood

D’Auria

Mecca

Bruno

et al. 2021

Forests

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Improvements in the yield and solubility of chestnut wood extractives, by using different extraction methods and molybdenum catalysts as support, have rarely been reported in literature. Many studies focus on the different parts of trees, except for the chemical characteristics of the remaining extractives achieved from thermally modified (THM) chestnut (Castanea sativa Mill) wood. This research seeks to better understand the effects of extraction techniques and catalysts on the yield and solubility of extractives. GC-MS analysis of the chloroform soluble and insoluble fractions was also used. Accelerated Solvent Extraction (ASE) 110 °C, Soxhlet, and autoclave extraction techniques were used to obtain extractives from untreated and thermally modified (THM) chestnut wood (170 °C for 3 h). Ethanol/H2O, ethanol/toluene, and water were the solvents used for each technique. A polyoxometalate compound (H3PMo12O40) and MoO3 supported on silica were used as catalysts. The THM induced a change in the wood’s surface color (ΔE = 21.5) and an increase in mass loss (5.9%), while the equilibrium moisture content (EMC) was reduced by 17.4% compared to the control wood. The yields of the extractives and their solubility were always higher in THM and mainly used ASE as the technique. GC-MS analysis of the extractives, without catalyst support, showed different results for each extraction technique and type of wood (untreated and THM). Ultimately, the amount of extractive compound dissolved in each solvent will differ, and the choice of extraction technique will depend on the intended final application of the extracted chemical product.

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Section: Catalystsmentioning

confidence: 99%

“…In a few cases, some compounds can be originated from the waxes hexadecanoic acid, deriving from the oxidative fission of cellular membranes of the wood. In a few cases, some compounds can be originated from [14,38].…”

Section: Catalystsmentioning

confidence: 99%

Extraction Methods and Their Influence on Yield When Extracting Thermo-Vacuum-Modified Chestnut Wood

D’Auria

Mecca

Bruno

et al. 2021

Forests

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“…In the last decades, with the aid of various investigation techniques, the study of the chemical composition of wood and in particular of its extractives has gained noticeable importance. Wood represents a natural resource, largely used for energy purposes, in the construction, furniture, pulp and paper industries, and for the creation of chemical products and compounds of great industrial use, widely used in the cosmetics, biomedical, pharmaceutical and food sectors, and even in biodiesel production [1,2]. The field of wood chemistry and wood-derived products covers various aspects of chemical technology applied to the wood sector: from the amounts of lignin, cellulose and hemicelluloses, analysis of extractives, up to the characterization of adhesives and studies on the interphase between wood and adhesive formulations or finishing products.…”

Section: Introductionmentioning

confidence: 99%

GC-MS and SPME Techniques Highlighted Contrasting Chemical Behaviour in the Water Extractives of Modified Castanea sativa Mill. and Fagus sylvatica L. Wood

Mecca

Todaro

Giudice

et al. 2021

Forests

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The sweet chestnut (Castanea sativa Mill.) and European beech (Fagus sylvatica L.) are wood species largely present in the European forest area. The composition and relative variation of the secondary metabolites of chestnut and European beech wood under thermal effect is a little-explored area. The wood material was thermally modified at 170 °C for 3 h using a thermo-vacuum technology. Raw and modified wood extracts were obtained with aqueous extraction techniques in an autoclave, subsequently lyophilized, solubilized in ethyl acetate, and determined by Gas Chromatographic-Mass Spectrometric Analyses (GC-MS). In addition, the volatile compounds were determined by Solid-Phase Micro Extraction (SPME) analyses. As a general statement, the extraction in an autoclave produced a higher number of compounds in the modified chestnut and beech wood compared to unmodified wood material. Beech wood showed low degradation in the compounds after modification. Notably, squalene and ar-tumerone were the main bioactive compounds present in beech wood extractives. Chestnut, conversely, showed a greater degradation after thermo-modification. However, a reduction in chemical compounds in the modified samples was also observed. In this case, the main biologically active compounds detected only in the chestnut control samples were apocynin and ar-tumerone. The recovery of this residual wood material, before energy consumption, could provide a sustainable and environmentally friendly means of obtaining natural chemicals suitable for various industrial applications.

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“…Recently, we reported the composition of the extracts of thermo-treated wood (alder, cedar) by using Soxhlet extraction and different solvents [ 1 ]; furthermore, we reported the composition of the extractives of cedar when the extraction was performed both in autoclave using water and by using Soxhlet, and alder by using Soxhlet where the yields of extractives were enhanced by using molybdenum catalyst [ 2 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

The Use of a Molybdenum Polyoxometalated Compound to Increase the Amount of Extractives from Wood Wastes

2018

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The treatment of wood wastes of Castanea sativa L., Quercus frainetto, Larix decidua, and Paulownia tomentosa S. in autoclave in the presence of micrometric crystals of H3PMo12O40 showed an impressive increase of the amount of extractives. The extractives were mainly constituted of insoluble compounds that were analyzed by using gas chromatography-mass spectrometry (GC-MS) after acetylation. The GC-MS analysis of the chloroform soluble fraction of the extractives obtained from sativa showed the presence of methyl hexadecanoate and octadecanoic acid, that of the extractives of frainetto showed the presence of octadecanal and some long chain hydrocarbons. decidua extracts showed the presence of large amounts of sesamin, while the extractives of P tomentosa revealed the presence of 4-hydroxy-3,5-dimethoxybenzaldehyde, 4-hydroxy-3,5-dimethoxycimmanaldehyde, and relevant amounts of long chain hydrocarbons. The insoluble fraction showed the presence of relevant amounts of several carbohydrates and, in the case of C. sativa, of inositol.

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Extractives fom Cedar Deodara and Alnus Cordata in the Presence of Molybdenum Catalysts

Cited by 5 publications

References 22 publications

Extraction Methods and Their Influence on Yield When Extracting Thermo-Vacuum-Modified Chestnut Wood

Extraction Methods and Their Influence on Yield When Extracting Thermo-Vacuum-Modified Chestnut Wood

GC-MS and SPME Techniques Highlighted Contrasting Chemical Behaviour in the Water Extractives of Modified Castanea sativa Mill. and Fagus sylvatica L. Wood

The Use of a Molybdenum Polyoxometalated Compound to Increase the Amount of Extractives from Wood Wastes

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