Use of H3PO4/ZrO2–TiO2–surfactant mixed oxide for catalytic vapor-phase dehydration of 1-octanol

Aghaei, Hamidreza; Ghiaci, Mehran

doi:10.1007/s11144-020-01854-0

Cited by 15 publications

(2 citation statements)

References 66 publications

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“…FT-IR spectroscopy, as a useful method, is employed to detect a variety of functional groups in a compound. [37] IR appears to be one of the best techniques to confirm the structure of Diatomite-Si-Pr-TAT-Bis-(AZY-MY)(Cu)Phenol. Figure 1 shows the FT-IR spectra of diatomite and modified diatomite in different steps.…”

Section: Characterization Of the Catalystmentioning

confidence: 99%

Dual Copper (II) Complex Supported on Diatomite as a Novel and Green Catalyst for the Synthesis of Dihydropyrano[3;2‐b]Chromenediones and Aminopyranopyrans

2021

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Immobilized copper (II) complex, namely, 2,2'-((1E,1'E)-((6-(l2azaneyl)-1,3,5-triazine-2,4-diyl)bis(azaneylylidene))bis (methaneylylidene))diphenol, supported on diatomite (Diatomite-Si-Pr-TAT-Bis-(AZY-MY)(Cu)Phenol) was introduced as a robust and heterogeneous catalyst for the synthesis of dihydropyrano[3;2-b]chromenediones and aminopyranopyrans. The Diatomite-Si-Pr-TAT-Bis-(AZY-MY)(Cu)Phenol catalyst was synthesized by complexation of copper (II) acetate with TAT-Bis-(AZY-MY)Phenol as a ligand with oxygen and nitrogen ligation sites that were anchored on diatomite through 3chloropropyltrimethoxysilane. The prepared catalyst was characterized using different microscopic and spectroscopic techni-ques including SEM, TEM, EDX, XRD, FT-IR, TGA and ICP. The diatomite is available and cheap support with a high specific surface area and a large amount of hydroxyl group on the surface. A large amount of dual copper (II) complexes were supported on diatomite through covalent bonds. The Diatomite-Si-Pr-TAT-Bis-(AZY-MY)(Cu)Phenol showed good catalytic activity for the synthesis of dihydropyrano[3;2-b] chromenediones and aminopyranopyrans using aromatic aldehyde, kojic acid, dimedone, or malononitrile. In addition, this catalyst system was reusable for five consecutive catalytic cycles without loss of their catalytic activity.

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Section: Characterization Of the Catalystmentioning

confidence: 99%

Dual Copper (II) Complex Supported on Diatomite as a Novel and Green Catalyst for the Synthesis of Dihydropyrano[3;2‐b]Chromenediones and Aminopyranopyrans

2021

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“…The selectivity improvement caused by Lewis basic sites was also investigated by Chen et al with sodium-impregnated Al 2 O 3 . Boronic acid and phosphoric acid impregnated in ZrO 2 and TiO 2 are among other catalysts used for the dehydration of octanol with temperatures around 350 °C. , Other groups have used, for example, ion-exchange resins or Amberlyst-70 for the dehydration of octanol but with a selectivity toward dioctylether rather than octenes, studying the equilibrium of the two competing reactions. From 140 to 180 °C, the equilibrium slowly started to shift from the ether formation to the olefin formation in a batch-type reaction setting with ethers still being the major product. − , …”

Section: Introductionmentioning

confidence: 99%

Catalyst Recycling in the Reactive Distillation of Primary Alcohols to Olefins Using a Phosphoric Acid Catalyst

Vossen

Vorholt

Leitner

2022

ACS Sustainable Chem. Eng.

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Olefins are essential basic chemicals in all areas of the chemical industry and can be produced from alcohols by dehydration. The amount of alcohols produced from biomass sources is expected to rise in the next decade. Various heterogeneously catalyzed processes have been developed in previous works operating at a high reaction temperature of 350 °C to obtain olefins from alcohols. In this work, we present the conversion of C7 to C12 α-alcohols to the corresponding olefins using phosphoric acid as a strong inorganic homogeneous acid catalyst. The reaction network was investigated using a microwave reactor. A system with a reactive distillation of the produced water and olefins was developed to shift the equilibrium of the reaction toward the olefins. Mild reaction conditions were utilized with temperatures ranging between 170 and 230 °C. The catalyst was recycled successfully over 12 runs in batch reactions and in semi-continuous flow experiments at 190 °C over 6 h. Up to 93% yield of olefinic products were obtained with the corresponding ether as the major side product.

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A Novel Biodegradable Magnetically/Recyclable Cellulose-Based Adsorbent: Synthesis, Characterization, and Experimental Design Toward Cd(II) Removal

Ghahremani

Nezamzadeh‐Ejhieh

Vakili

2023

Water Air Soil Pollut

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Use of H3PO4/ZrO2–TiO2–surfactant mixed oxide for catalytic vapor-phase dehydration of 1-octanol

Cited by 15 publications

References 66 publications

Dual Copper (II) Complex Supported on Diatomite as a Novel and Green Catalyst for the Synthesis of Dihydropyrano[3;2‐b]Chromenediones and Aminopyranopyrans

Dual Copper (II) Complex Supported on Diatomite as a Novel and Green Catalyst for the Synthesis of Dihydropyrano[3;2‐b]Chromenediones and Aminopyranopyrans

Catalyst Recycling in the Reactive Distillation of Primary Alcohols to Olefins Using a Phosphoric Acid Catalyst

A Novel Biodegradable Magnetically/Recyclable Cellulose-Based Adsorbent: Synthesis, Characterization, and Experimental Design Toward Cd(II) Removal

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