Influence of the oxidation state of vanadium on the reactivity of V/P/O, catalyst for the oxidation of n-pentane to maleic and phthalic anhydrides

Bignardi, Gaetano; Cavani, Fabrizio; Cortelli, Carlotta; Lucia, T. De; Pierelli, Francesca; Trifirò, Ferruccio; Mazzoni, G.; Fumagalli, Carlo; Monti, Tiziana

doi:10.1016/j.molcata.2005.09.010

Cited by 14 publications

(33 citation statements)

References 31 publications

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“…The effect of reaction temperature on n-pentane conversion and the product yields over 'non-equilibrated' and 'equilibrated' VPO catalysts showed that the yield in maleic anhydride increases from 280 to 400°C, leveling at 370°C, while the phthalic anhydride yield reaches a maximum at 350°C and then decreases with an increase in the formation of the carbon oxides 39 . Similar trends were observed by Bignardi et al 40 , who showed that the selectivity towards maleic anhydride increased with an increase in the reaction temperature but the selectivity towards phthalic anhydride decreased.…”

Section: Catalytic Testingsupporting

confidence: 89%

Partial oxidation of n-pentane over vanadium phosphorus oxide supported on hydroxyapatites

Singh

2016

S.Afr.j.chem.

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The selective oxidation of n-pentane to value-added products, maleic anhydride or phthallic anhydride by vanadium phosphorus oxide loaded on hydroxyapatites as catalysts and oxygen as oxidant was investigated. Hydroxyapatite (HAp) and cobalthydroxyapatite (Co-HAp) were prepared by the co-precipitation method and VPO with varying weight percentages (2.5-15.0 %) were loaded on the hydroxyapatite supports by the wet impregnation technique. The catalyst materials were characterized by surface area measurements, elemental analysis, powder X-ray diffraction (XRD), infrared spectroscopy (IR) and temperatureprogrammed reduction (TPR). VPO is present in two phases, viz. (VO) 2 P 2 O 7 and VOPO 4 . With increase in the VPO loading on the hydroxyapatites, the (VO) 2 P 2 O 7 phase also increased. From catalytic results, a conversion of 75 % of n-pentane and selectivity towards maleic anhydride, about 50 % and phthalic anhydride, about 25 %, were consistently achieved with loadings of 5.0 and 7.5 wt. % VPO at 360°C for GHSVs of 1900 and 2300 h -1 . Under optimum conditions, product yields of up to 40 % maleic anhydride and 20 % phthalic anhydride were obtained. It is proposed that the products formed through the diene intermediate. KEYWORDSSelective oxidation, n-pentane, vanadium phosphorus oxide, hydroxyapatite, maleic anhydride, phthalic anhydride.

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Section: Catalytic Testingsupporting

confidence: 89%

Partial oxidation of n-pentane over vanadium phosphorus oxide supported on hydroxyapatites

Singh

2016

S.Afr.j.chem.

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“…An important exception was ac arbazole compound, which was tentatively identified as 5H-naphtho[2,3-C]carbazole-5-methyl.C arbazoles are antibiotics that can be released by microorganisms during the final period of the fermentation process. [73][74][75] Lastly,F igure 9c ompares the best MA and PA yields that were achieved in all cases at total 1-butanol conversion and at T = 340-360 8Cw ith the various BB samples. It is shown that the same effects as those found during BB1 oxidehydration ( Figure 8) were also observed with the contaminated CB (with 1-butanol conversion of 100 %i na ll cases): a) ad ecrease of the yield to light acids, with an increase of the yield to CO x ,a nd b) ad ecrease of the MA/PAs electivity ratio.…”

Section: The Reactionofb Io-1-butanolmentioning

confidence: 82%

“…However,i ti sw orth noting that, in the case of n-pentane oxidationt oM Aa nd PA,t he mechanism proposed did not involve any Diels-Alder reaction between pentadiene andM Ab ut rather the oxidation of dialkylaromatics, which are formed by olefin dimerisation and oxidative dehydrocyclisation. [73][74][75] Therefore, it cannotb er uled out that, even in the case of 1-butanol oxidation, the formation of PA may indeed occur by the oxidation of o-xylene that has been formed by the oxidative dehydrocyclodimerisation of butenes.…”

Section: Resultsmentioning

confidence: 99%

A New Process for Maleic Anhydride Synthesis from a Renewable Building Block: The Gas‐Phase Oxidehydration of Bio‐1‐butanol

et al. 2015

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We investigated the synthesis of maleic anhydride by oxidehydration of a bio-alcohol, 1-butanol, as a possible alternative to the classical process of n-butane oxidation. A vanadyl pyrophosphate catalyst was used to explore the one-pot reaction, which involved two sequential steps: 1) 1-butanol dehydration to 1-butene, catalysed by acid sites, and 2) the oxidation of butenes to maleic anhydride, catalysed by redox sites. A non-negligible amount of phthalic anhydride was also formed. The effect of different experimental parameters was investigated with chemically sourced 1-butanol, and the results were then confirmed by using genuinely bio-sourced 1-butanol. In the case of bio-1-butanol, however, the purity of the product remarkably affected the yield of maleic anhydride. It was found that the reaction mechanism includes the oxidation of butenes to crotonaldehyde and the oxidation of the latter to either furan or maleic acid, both of which are transformed to produce maleic anhydride.

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“…Phthalic anhydride (PA) is a versatile intermediate for the chemical industry with global production of more than three million tons per annum, serving a wide range of industries including phthalate ester plasticizers, polyester resins, dyestuffs, and pharmaceuticals . Currently, PA is primarily produced by catalytic oxidation of naphthalene or ortho ‐xylene, which is refined from petroleum or coal . Given current concerns about fossil fuel depletion and environmental footprint, some progress has been made in seeking sustainable solutions for the production of chemicals from renewable biomass .…”

Section: Introductionmentioning

confidence: 99%

One‐Pot Synthesis of Renewable Phthalic Anhydride from 5‐Hydroxymethfurfural by using MoO₃/Cu(NO₃)₂ as Catalyst

et al. 2019

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Herein, a synthetic pathway to renewable phthalic anhydride (PA) from 5‐hydroxymethfurfural (HMF) in one pot is reported. The commonly available catalysts MoO3 and Cu(NO3)2 play a crucial role in integrating the multiple steps of the reaction, namely decarbonylation of HMF to active furyl intermediate (AFI), oxidation of HMF to maleic anhydride (MA), Diels–Alder cycloaddition of AFI and MA, and subsequent dehydration, in one pot. Under mild reaction conditions, a 63.2 % yield of PA is obtained from HMF. Compared with the currently reported route to renewable PA based on the Diels–Alder cycloaddition of biomass‐derived MA and furan, this convenient one‐pot synthesis represents a great improvement in efficiency.

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Influence of the oxidation state of vanadium on the reactivity of V/P/O, catalyst for the oxidation of n-pentane to maleic and phthalic anhydrides

Cited by 14 publications

References 31 publications

Partial oxidation of n-pentane over vanadium phosphorus oxide supported on hydroxyapatites

Partial oxidation of n-pentane over vanadium phosphorus oxide supported on hydroxyapatites

A New Process for Maleic Anhydride Synthesis from a Renewable Building Block: The Gas‐Phase Oxidehydration of Bio‐1‐butanol

One‐Pot Synthesis of Renewable Phthalic Anhydride from 5‐Hydroxymethfurfural by using MoO₃/Cu(NO₃)₂ as Catalyst

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Influence of the oxidation state of vanadium on the reactivity of V/P/O, catalyst for the oxidation of n-pentane to maleic and phthalic anhydrides

Cited by 14 publications

References 31 publications

Partial oxidation of n-pentane over vanadium phosphorus oxide supported on hydroxyapatites

Partial oxidation of n-pentane over vanadium phosphorus oxide supported on hydroxyapatites

A New Process for Maleic Anhydride Synthesis from a Renewable Building Block: The Gas‐Phase Oxidehydration of Bio‐1‐butanol

One‐Pot Synthesis of Renewable Phthalic Anhydride from 5‐Hydroxymethfurfural by using MoO3/Cu(NO3)2 as Catalyst

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One‐Pot Synthesis of Renewable Phthalic Anhydride from 5‐Hydroxymethfurfural by using MoO₃/Cu(NO₃)₂ as Catalyst