Gas phase oxidation of 2-methyl-1,3-propanediol to methacrylic acid over heteropolyacid catalysts

Mahboub, Mohammad Jaber Darabi; Lotfi, Samira; Dubois, Jean‐Luc; Patience, Gregory S.

doi:10.1039/c6cy01025c

Cited by 18 publications

(5 citation statements)

References 38 publications

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“…Gas-and liquid-phase oxidation of 2-methyl-1,3-propanediol (C 4 H 10 O 2 )t om ethacrylic acid( C 4 H 6 O 2 )a ccordingt oC 4 H 10 O 2 + 2O 2 !C 4 H 6 O 2 + 2H 2 Ow as shown [33] to occur over heteropoly- and Cu promoter, such as Cs x (NH 4 ) 3Àx PMo 12 O 40 (VO)Cu 0.5 ,w hich replace acetone cyanohydrin [(CH 3 ) 2 C(OH)CN] in the ACH process, which is known to provide large quantities of unwanted ammoniumb isulfate byproduct duet of acile decomposition to acetone and hydrogen cyanide, which is particularly toxic. This is an importanti mprovement, as methyl methacrylate can be polymerized to poly(methyl methacrylate), which is known as Plexiglasso r Altuglassa nd is used for coatings and paints.…”

Section: Recent Developments In Academia and Industry And Challenges mentioning

confidence: 84%

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Metal Oxides in Heterogeneous Oxidation Catalysis: State of the Art and Challenges for a More Sustainable World

2019

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This Review presents current knowledge, recent results, and challenges for the future in heterogeneous oxidation catalysis in liquid and gaseous phases on solid metal oxide catalysts. Metal oxides that are used as catalysts and their main structures and properties are summarized, as well as their catalytic properties in selective and total oxidation reactions, which were studied intensively, experimentally and theoretically, by Professor Jerzy Haber during his scientific life. Some emphasis is placed on the classical and unusual catalyst activation procedures for improving catalytic properties for better efficiency. For a more sustainable world, several examples are given of the oxidation of biomass derivatives to synthesize valuable chemicals and of other applications of metal oxides, such as depollution, photocatalysis, hydrogen production and fuel‐cell components. The importance of metal oxide catalysis in environmental and green chemistry and sustainability is discussed, and challenges for the future are considered.

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Section: Recent Developments In Academia and Industry And Challenges mentioning

confidence: 84%

“…Gas-and liquid-phase oxidation of 2-methyl-1,3-propanediol (C 4 H 10 O 2 )t om ethacrylic acid ( C 4 [33] to occur over heteropoly-…”

Section: Recent Developments In Academia and Industry And Challenges mentioning

confidence: 99%

Metal Oxides in Heterogeneous Oxidation Catalysis: State of the Art and Challenges for a More Sustainable World

2019

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“…Microfluidized bed reactors have distinct advantages compared to fixed bed reactors to measure kinetics and develop processes relying on vaporizing liquids. , Heat transfer rates are an order of magnitude higher, which ensures the reactor operates isothermally, minimizes hot spots, but more importantly heats the aerosol from the sparger rapidly. Furthermore, solids mixing minimizes radial concentration gradients.…”

Section: Resultsmentioning

confidence: 99%

“…Fluidized bed reactors are more appropriate than fixed bed reactors due to higher heat and mass transfer rates and shorter contact times (<1 s). Dalil et al reported the dehydration of glycerol to acrolein, while Keggin type catalyst oxidized 2-methyl-1,3-propanediol to methacrylic acid, spraying the reactants directly in the catalytic bed. , As a first catalyst, we chose WO 3 /TiO 2 because of its efficacy to dehydrate glycerol to acrolein operating under similar conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Dalil et al 44 reported the dehydration of glycerol to acrolein, while Keggin type catalyst oxidized 2-methyl-1,3-propanediol to methacrylic acid, spraying the reactants directly in the catalytic bed. 45,46 As a first catalyst, we chose WO 3 /TiO 2 because of its efficacy to dehydrate glycerol to acrolein operating under similar conditions. Here, for the first time we report that fructose reacts to furfural and diformyl furan in the gas phase in a continuous microfluidized bed reactor, with tungsten oxide over TiO 2 as catalyst.…”

Section: ■ Introductionmentioning

confidence: 99%

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Gas-Phase Fructose Conversion to Furfural in a Microfluidized Bed Reactor

Carnevali

Guévremont

Rigamonti

et al. 2018

ACS Sustainable Chem. Eng.

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Specialty chemicals from sugars are destined to displace fermentation to alcohols due to their superior economic value and atom efficiency. Compared to bioethanol, retention of oxygen functional groups increases by 2–5 times the market value of specialty chemicals like furfural, 2,5-furan dicarboxylic acid, 2,5-dimethyl furan, and γ-valerolactone. For the first time, we report a gas-phase process that converts C-6 monosaccharides to furfural in a microfluidized bed reactor. A spray nozzle inserted directly into the catalytic bed atomizes a fructose–water solution to micron-sized droplets; water evaporates, and WO3/TiO2 converts fructose to furfural. Furfural yield reached 22% after 3 h time-on-stream with 15% diformyl furan as coproduct. Acetic acid yield was mostly below 10% but was as high as 27%. During the initial tests, coke and catalyst agglomerates blocked the sparger tip, and run time varied between 1 and 3 h. Insulating the nozzle leading into the bed reduced the injector wall temperature and improved reactor operability; the 15 mm i.d. reactor ran continuously for 19 h after this modification.

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Influence of atomization conditions on spray drying lithium iron phosphate nanoparticle suspensions

Rigamonti

Song

et al. 2018

Can J Chem Eng

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Removing solvents from nanoparticle solid suspensions requires the same diligence as drying pharmaceutical ingredients. LiFePO 4 nanoparticles suspension in water oxidize, sinter, and Li 3 PO 4 segregates on the surface when they dry in a furnace. Spray drying preserves the material properties because contact times are on the orders of seconds; furthermore, the atomized droplets ensure particles are small (5 m to 20 m) and dispersed. A Yamato GA-32 (120 mm inner diameter) spray dried in co-current flow a nanoparticle suspension of LiFePO 4 in water, with a solid content up to 60 %. Atomization gas velocities of 140 m s −1 to 350 m s −1 agglomerated the nanomaterial into spherical particles that ranged from 3 m to 10 m. The particle diameters ranged from 10 m to 20 m at atomization velocities of 50 m s −1 to 140 m s −1 . At this condition, yield was lower because the semi-dried particles adhere on the wall. At 150 • C to 200 • C the surface area reached 26 m 2 g −1 while from 50 • C to 100 • C it varied from 14 m 2 g −1 to 20 m 2 g −1 . The trend for mesoporosity versus spray drying temperature is the same as for surface area: pore volumes are higher (0.18 cm 3 g −1 ) above 200 • C and 20 % lower below 200 • C. Drying temperature modifies drying speed; low temperatures compact the powders more than high temperature which results in lower surface area and porosity. Figure 13. Theta-2-theta acquisition at 50 kV and 40 mA, using a Cu anode, Gonio mode, CuK˛sideband removed.

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Gas phase oxidation of 2-methyl-1,3-propanediol to methacrylic acid over heteropolyacid catalysts

Abstract: Heteropolyacids with Cs, V and Cu partially oxidize 2MPDO to methacrylic acid (40% selectivity) in the gas phase at 250 °C.

Cited by 18 publications

References 38 publications

Metal Oxides in Heterogeneous Oxidation Catalysis: State of the Art and Challenges for a More Sustainable World

Metal Oxides in Heterogeneous Oxidation Catalysis: State of the Art and Challenges for a More Sustainable World

Gas-Phase Fructose Conversion to Furfural in a Microfluidized Bed Reactor

Influence of atomization conditions on spray drying lithium iron phosphate nanoparticle suspensions

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