ChemInform Abstract: OXYHYDRATIVE SCISSION OF OLEFINS. II. EXAMINATION OF REACTION MECHANISM

Takita, Yusaku; Nita, Kazuhide; Mitsui, Takashi; Yamazoe, Noboru; Seiyama, Tetsuro

doi:10.1002/chin.197802126

Cited by 7 publications

(10 citation statements)

References 1 publication

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“…From the studies of TAKI-TA et al [16] and results from the current authors [21], it is known that the first step of the reaction consists of the formation of a butoxide intermediate, which is further oxidized to 2-butanone and consecutively subjected to oxidative C-C bond scission to form AA and acetaldehyde. It was found by FTIR-spectroscopic investigations [21], that the temperature at which the butoxide intermediate is oxidized to the ketone should be a measure of the oxidation power of the catalysts, whereas the amount of adsorbed acetates should reflect the adsorption properties, i.e., the properties of both the acidic and basic sites.…”

Section: Introductionmentioning

confidence: 94%

“…During this process, considerable amounts of n-C 4 hydrocarbons (raffinate II) are obtained which are chemically used only to a low extent. Recently, a new process has been developed by Wacker Chemie [15], which converts this pyrolysis fraction containing a mixture of 80 % n-butenes and 20 % n-butane by OHS to AA at elevated pressures and temperatures of about 200 C [16,17].…”

Section: Introductionmentioning

confidence: 99%

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Nanostructured Vanadia‐Titania Catalysts with Hierarchical Architecture in the Oxyhydrative Scission of 1‐Butene to Acetic Acid

Stelzer¹,

Fait

Bentrup

et al. 2004

Chem Eng & Technol

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The synthesis of hierarchically designed supported vanadia‐titania catalysts and their properties in the oxyhydrative scission (OHS) of 1‐butene to acetic acid (AA) is described. The interaction of the TiO2 support with V2O5 appears to be responsible for an enhanced catalytic performance, and it is proposed that the catalytic activity is related to the number and size of the contact zones between the support and the active component.

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Nanostructured Vanadia‐Titania Catalysts with Hierarchical Architecture in the Oxyhydrative Scission of 1‐Butene to Acetic Acid

Stelzer¹,

Fait

Bentrup

et al. 2004

Chem Eng & Technol

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“…Takita et al [2] proposed a oxyhydrative scission (OHS) mechanism for the oxidation of butene to acetic acid. According to this, methyl ethyl ketone is initially formed by oxyhydration of the olefin and is consecutively subjected to oxidative C-C bond scission.…”

Section: Introductionmentioning

confidence: 99%

Structure–reactivity relationships in VO /TiO2 catalysts for the oxyhydrative scission of 1-butene and n-butane to acetic acid as examined by in situ-spectroscopic methods and catalytic tests

et al. 2006

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Different VO x /TiO 2 catalyst have been catalytically tested and studied by in situ-spectroscopic methods (FT-IR, UV/vis, EPR) in the oxyhydrative scission (OHS) of 1-butene and n-butane to acetic acid (AcOH). While 1-butene OHS follows the sequence butane → butoxide → ketone → AcOH/acetate with a multitude of side products also formed, n-butane OHS leads to AcOH, CO x and H 2 O only. Water vapour in the feed improves AcOH selectivity by blocking adsorption sites for acetate. The admixture of Sb 2 O 3 was found to improve AcOH selectivity which is due to deeper V reduction under steady state conditions and lowering of surface acidity. VO x /TiO 2 catalysts with sulfate-containing anatase are the most effective ones. Covalently bonded sulfate at the catalyst surface causes specific bonding of VO x , stabilizes active V species and ensures their high dispersity.

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“…IR spectra of V 2 O 5 /MgO after crotonic acid adsorption (RT) (1) and its interaction with oxygen at 373 K (2), 473 K (3), 573 K (4) and 673 K(5) …”

mentioning

confidence: 99%

“…Supported vanadium oxides form a group of industrially important catalysts for the selective oxidation of hydrocarbons. Depending on the reaction type, vanadium catalysts selectively oxidize propene to acetic acid [3], butadiene to maleic anhydride [4] or acetic acid [5], and methanol to formaldehyde [6]. __________________________ MgO has been extensively studied as a catalyst or a catalyst support for heterogeneous catalytic reactions [7].…”

mentioning

confidence: 99%

Selective oxidation of crotyl alcohol and crotonaldehyde on V2O5/MgO: In situ FTIR study

Lochař

Smoláková

2009

React Kinet Catal Lett

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The adsorption of crotyl alcohol, crotonaldehyde and crotonic acid on MgO, V 2 O 5 and V 2 O 5 /MgO mixed oxide was studied under oxidizing conditions by in situ FTIR spectroscopy. The results were further analyzed in order to investigate the surface intermediates of crotonaldehyde oxidative dehydrogenation to maleic anhydride. A stable surface compound, alkoxide, was found during the crotyl alcohol adsorption for all oxides at room temperature (RT). The reaction between the adsorbed crotonaldehyde and the oxygen atom of the catalyst resulted in the formation of carboxylate at higher temperatures (T>373 K). The formation of two different reaction products (furane and maleic anhydride) was detected from IR spectra following the crotonaldehyde adsorption at various oxygen pressures. It can be deduced that crotonic acid easily dissociates to form the surface carboxylate-crotonate, which is further oxidized to maleate and consequently to maleic anhydride at 573 K.

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ChemInform Abstract: OXYHYDRATIVE SCISSION OF OLEFINS. II. EXAMINATION OF REACTION MECHANISM

Cited by 7 publications

References 1 publication

Nanostructured Vanadia‐Titania Catalysts with Hierarchical Architecture in the Oxyhydrative Scission of 1‐Butene to Acetic Acid

Nanostructured Vanadia‐Titania Catalysts with Hierarchical Architecture in the Oxyhydrative Scission of 1‐Butene to Acetic Acid

Structure–reactivity relationships in VO /TiO2 catalysts for the oxyhydrative scission of 1-butene and n-butane to acetic acid as examined by in situ-spectroscopic methods and catalytic tests

Selective oxidation of crotyl alcohol and crotonaldehyde on V2O5/MgO: In situ FTIR study

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