Deactivation of an industrial V2O5–TiO2 catalyst for oxidation of o-xylene into phthalic anhydride

Anastasov, A. I.

doi:10.1016/s0255-2701(02)00063-6

Cited by 23 publications

(37 citation statements)

References 31 publications

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“…The load of this catalyst reaches 80 g/m 3 (STP). As it is expected, the purpose of this study is identical with that one exposed in Anastasov (2003a). It consists in determining the activity profiles along the bed, which give the best approximation to the experimental temperature regimes, phthalic anhydride yields and side products obtained in the industrial reactor during different periods of catalyst use.…”

Section: Introductionmentioning

confidence: 94%

“…The importance and the unabated interest in this oxidation process (Boger and Menegola, 2005), as well as the trend to use highproductive catalysts in industry (Verde and Neri, 1984a), are worthy of the studies dedicated to the deactivation of the above-mentioned catalysts. Based on these considerations, in a previous paper (Anastasov, 2003a) we made an attempt to evaluate quantitatively the deactivation of the O 4-26 catalyst during the complete cycle of its exploitation in the industrial reactor. It is a vanadia-titania catalyst, and it operates with an inlet o-xylene concentration of up to 60 g/m 3 (STP).…”

Section: Introductionmentioning

confidence: 99%

“…Its producer is BASF Company. This paper is an extension of the above-mentioned study (Anastasov, 2003a), and it deals with the behavior of another, more modern and productive catalyst for oxidation of o-xylene to phthalic anhydride. It is named O 4-28 and it is also a V 2 O 5 -TiO 2 (anatase) supported catalyst produced by the same company.…”

Section: Introductionmentioning

confidence: 99%

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Deactivation properties of a high-productive vanadia-titania catalyst for oxidation of o-xylene to phthalic anhydride

Georgieva

Anastasov

Nikolov

2008

Braz. J. Chem. Eng.

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-The behavior of a high-productive V 2 O 5 -TiO 2 (anatase) supported O 4-28 catalyst for oxidation of o-xylene to phthalic anhydride was investigated in the first three years of its exploitation in industry. By using a suitable mathematical model, an identification problem was solved and activation profiles of the catalyst along a fixed bed located in the tubes of an industrial reactor were determined. Experimental temperature regimes and yields of the main and side products for different periods of the catalyst life were used. The proper technological regimes providing for a maximum yield according to the requirements of the catalyst producer company were defined.

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Deactivation properties of a high-productive vanadia-titania catalyst for oxidation of o-xylene to phthalic anhydride

Georgieva

Anastasov

Nikolov

2008

Braz. J. Chem. Eng.

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“…The ratio adjustment of o-xylene to air is an essential step to avoid the explosion. This process is highly exothermic in nature with (-264 kcal/mole) heat released [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…Large amount of benzoic acid is produced as a side reaction in the synthesis of phthalic anhydride by the partial oxidation of o-xylene. Reaction between oxygen and o-xylene is exothermic in nature and due to insufficient oxidation of o-xylene and rise in temperature of the reaction from 240°C to 480°C is observed with some of the side reactions [2]. Along with benzoic acid maleic anhydride, methyl maleic anhydride-toluic acid and some unknown impurities are produced in the side reactions.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Physical and Chemical Method for Separation of Benzoic Acid from Industrial Waste Stream

Khan¹,

Usman²

2017

J Adv Chem Eng

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Journal of Advanced Chemical EngineeringKhan and Usman, J Adv Chem Eng 2016, 7:1 DOI: 10.4172/2090-4568.1000161 Volume AbstractPhthalic anhydride is manufactured by the partial oxidation of ortho xylene in the presence of V 2 O 5 /TiO 2 catalyst. In the residue, maleic acid, benzoic acid (BA), telluric acid and traces of other organic compounds are present in the by-product stream. There is almost 60% of (BA) in the residue sample, which compels to recover the tremendous amount of (BA), as it is of great importance. The waste stream is in the form of slurry at high temperature and is solidified at room temperature. Benzoic acid was selectively removed from the solid waste of Phthalic anhydride production industry by the processes associated with less intensive parameters as compare to the extraction techniques achieved by, pressurized hot water, supercritical CO 2 extraction, where the required parameters are highly intensive. The separation has been performed by using physical and chemical techniques. In physical methods recrystallization (RE), liquid-liquid extraction (LLE) as well as recrystallization followed by liquidliquid extraction (RE, LLE) and liquid-liquid extraction followed by recrystallization (LLE, RE) have been studied. In another attempt chemical derivatization (CD) has been performed for the purification purposes. The operation has been performed at the atmospheric pressure with operating temperatures of 100°C and 25°C in physical processes (RE) and (LLE) respectively while in chemical derivatization it ranges from 72°C to 100°C. The characterization of the samples was accomplished by GCMS, FTIR and also its melting point was determined. Almost 99% of the purity was achieved by CD, LLE, RE followed LLE and LLE followed by RE.

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Oxidation of o ‐Xylene and Naphthalene to Phthalic Anhydride – Catalyst Development (Case Study)

Richter

Eberle²,

Munck³

et al. 2023

Industrial Arene Chemistry

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Deactivation of an industrial V2O5–TiO2 catalyst for oxidation of o-xylene into phthalic anhydride

Cited by 23 publications

References 31 publications

Deactivation properties of a high-productive vanadia-titania catalyst for oxidation of o-xylene to phthalic anhydride

Deactivation properties of a high-productive vanadia-titania catalyst for oxidation of o-xylene to phthalic anhydride

A Comparative Study of Physical and Chemical Method for Separation of Benzoic Acid from Industrial Waste Stream

Oxidation of o ‐Xylene and Naphthalene to Phthalic Anhydride – Catalyst Development (Case Study)

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