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Reusable catalyst

Tìm thấy 11+ kết quả cho từ khóa "Reusable catalyst"

One-pot synthesis of substituted 4H -chromenes by nickel ferrite nanoparticles as an efficient and magnetically reusable catalyst

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One-pot synthesis of substituted 4 H -chromenes by nickel ferrite nanoparticles as an efficient and magnetically reusable catalyst. A one-pot, three-component reaction is reported for the synthesis of substituted 4H -chromenes in the presence of NiFe 2 O 4 MNPs as a reusable catalyst in a green solvent at 40 ◦ C under clean, efficient, and mild conditions.

Three-component synthesis of cyclic β-aminoesters using CeO2 nanoparticles as an efficient and reusable catalyst

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Three-component synthesis of cyclic β -aminoesters using CeO 2 nanoparticles as an efficient and reusable catalyst. Abstract: CeO 2 nanoparticles were used as an efficient catalyst for the preparation of cyclic β -aminoesters by three- component reaction between primary amines, ethyl acetoacetate, and chalcones in ethanol.

The promoted synthesis of minoxidil by magnetic nanoparticles of cobalt ferrite (CoFe2O4) as a heterogeneous reusable catalyst

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/Mg(OH) 2 nanocomposite as an efficient heterogeneous catalyst for regioselective one-pot synthesis of β - chloroacetates from epoxides. doi: 10.1002/aoc.4520 20. ef?cient and reusable heterogeneous catalyst for the green synthesis of thiiranes from epoxides with thiourea.. Synthesis of Fe 3 O 4 nanoparticles with various sizes and mag-. 10.1016/j.jcis . Synthesis and characterization of CoFe 2 O 4 ferrite nanoparticles obtained by an electrochemical method. doi: 10.1021/jp907745v.

Advances in polymer based Friedlander quinoline synthesis

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Fe 3 O 4 @SiO 2 -imid-PMA n magnetic porous nanosphere as reusable catalyst for synthesis of polysubstituted quinolines under solvent-free conditions. CuFe 2 O 4 nanoparticles: A magnetically recoverable and reusable catalyst for the synthesis of quinoline and quinazoline derivatives in aqueous media. Nanocrystalline aluminium oxide: A mild and efficient reusable catalyst for the one-pot synthesis of poly-substituted quinolines via Friedlander hetero-annulation.

Synthesis of new oxindole derivatives containing benzothiazole and thiazolidinone moieties using nano silica-bonded 5-n-propyl-octahydro-pyrimido[1,2-a]azepinium chloride (NSB-DBU) as catalyst

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In summary, a series of unreported compounds containing thiazolidinone, benzothiazole, and oxindole rings were synthesized using NSB-DBU as a heterogeneous reusable catalyst. Preparation of nano silica-bonded 5-n-propyl-octahydro-pyrimido[1,2-a]azepinium chloride (NSB-DBU).

Acid-activated clay as heterogeneous and reusable catalyst for the synthesis of bioactive cyclic ketal derivatives

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Abstract: A new heterogeneous acid catalyst based on a natural resource, Tunisian clay (Clay-H0.5), has been prepared and characterized by FT-IR, FE-SEM, and powder X-ray diffraction (XRD), as well as chemical composition, cation exchange capacity, specific surface area, and pore volume. This achieved up to 92% isolated yield for only 10 wt.% of the catalyst. Importantly, the Clay-H0.5 catalyst showed good recyclability where insignificant activity loss was exhibited even after six runs.

Metal- and solvent-free preparation of benzo[4,5]imidazo[1,2-a]pyrimidine derivatives catalysed by deep eutectic solvents

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Keywords: Biginelli reaction, deep eutectic solvents, green catalyst, green chemistry.. method for the preparation of benzo[4,5]imidazo[1,2-a]pyrimidines using a deep eutectic solvent as an efficient and reusable catalyst. This is the first time DES has been used as a catalyst for the synthesis of benzo[4,5]imidazo[1,2-a] pyrimidine..

Hydrogen storage in formic acid as a renewable energy source using heterogeneous catalysis

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Pd and Pd-Ag nanoparticles within a macroreticular basic resin: an efficient catalyst for hydrogen production from formic acid decomposition. 10.1021/cs400148n. Amine-functionalized MIL-125 with imbedded palladium nanoparticles as an efficient catalyst for dehydrogenation of formic acid at ambient temperature. doi: 10.1021/jp4069027. Carbon supported trimetallic PdNiAg nanoparticles as highly active, selective and reusable catalyst in the formic acid decomposition. doi: 10.1016/j.apcatb .

Preparation of G-CuO NPs and G-ZnO NPs with mallow leaves, investigation of their antibacterial behavior and synthesis of bis(indolyl)methane compounds under solventfree microwave assisted dry milling conditions using G-CuO NPs as a catalyst

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An efficient and reusable catalyst for the synthesis of bis(indolyl)methanes. doi: 10.1016/jcatcom200607010. doi: 10.5897/ıjps12107. An efficient and clean synthesis of bis(indolyl)methanes in a protic solvent at room temperature. doi: 10.1007/bf02910889. doi: 10.1016/jmolcata200603043. Synthesis of Bis(indolyl)methanes using a Catalytic Amount of ZnO under Solvent-Free Conditions. doi: 10.1134/s .

Preparation of different thin film catalysts by direct current magnetron sputtering for hydrogen generation

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Cobalt–nickel–phosphorus supported on Pd-activated TiO 2 (Co–Ni–P/Pd-TiO 2 ) as cost-effective and reusable catalyst for hydrogen generation from hydrolysis of alkaline sodium borohydride solution.Journal of Alloys and Compounds 2011. Effects of electrodeposited Co and Co–P catalysts on the hydrogen generation properties from hydrolysis of alkaline sodium borohydride solution.Catalysis Today 2007. doi: 10.1016/j.cattod . doi: 10.1016/j.apcata .

Ranolazine-functionalized CuO NPs: Efficient homogeneous and heterogeneous catalysts for reduction of 4-nitrophenol

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Titania-supported silver nanoparticles: an efficient and reusable catalyst for reduction of 4-nitrophenol

Cu(II) immobilized on Fe 3O4@Agarose nanomagnetic catalyst functionalized with ethanolamine phosphate–salicylaldehyde Schiff base: A magnetically reusable nanocatalyst for preparation of 2-substituted imidazolines, oxazolines, and thiazolines

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Cu(II) immobilized on Fe 3 O 4 @Agarose nanomagnetic catalyst functionalized with ethanolamine phosphate–salicylaldehyde Schiff base: a magnetically reusable. Abstract: Herein we synthesized Cu(II) immobilized on Fe 3 O 4 @Agarose functionalized with ethanolamine phosphate–. Preparation of Cu(II) immobilized on Fe 3 O 4 @Agarose nanomagnetic catalyst functionalized with ethanolamine phosphate–salicylaldehyde Schiff base (Fe 3 O 4 @Agarose/SAEPH 2 /Cu(II))..

Hydrotalcite framework stabilized ruthenium nanoparticles (Ru/HTaL): Efficient heterogeneous catalyst for the methanolysis of ammonia-borane

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Moreover, the catalytic stability tests of Ru/HTaL in AB methanolysis showed that Ru/HTaL acts as a highly stable and reusable heterogeneous catalyst in this reaction by preserving more than 95% of its initial activity even at the 5th recycle..

Ultrarapid catalytic reduction of some dyes by reusable novel erythromycin-derived silver nanoparticles

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Reduction of MB dyes in the presence of (a) NaBH 4 and (b) with catalyst Ag(0) NPs.. Reduction of RB dyes in the presence of (a) NaBH 4 and (b) with catalyst Ag(0) NPs.. Reduction of EB. To explore the efficiency of Ag(0) NPs in an aqueous system, EB showed surface plasmon resonance at 515 nm. A small reduction of EB was observed with NaBH 4 in the absence of Ag(0) NPs for 1 h. It was observed that in the absence of catalyst the strong reducing agent NaBH 4 was unable to reduce EB.

Poly(N-vinylimidazole): A biocompatible and biodegradable functional polymer, metal-free, and highly recyclable heterogeneous catalyst for the mechanochemical synthesis of oximes

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Synthesis of N-methyl imines in the presence of poly(N-vinylpyridine) as a reusable solid base catalyst by a mechanochemical process. doi: 10.1007/s y

Troubleshooting catalyst 3900

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Refer to Catalyst 3900 Spanning Tree Modes. Much of the information in the summary display can be viewed individually by using the menus explained in the following sections of this guide.. commonly go to when troubleshooting the Catalyst 3900 switch. It will provide you with detailed information about events that have happened on the Catalyst 3900. Use this log history information to gain an understanding of events that have been logged on the Catalyst 3900..

Catalyst 3900 Troubleshooting

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Managing Your Catalyst 3900. Catalyst 3900 Token Ring Inter-Switch Link Module Configuration Note. Configuring Spanning Tree

Monodisperse palladium nanoparticles supported on chemically derived graphene: highly active and reusable nanocatalysts for Suzuki–Miyaura cross-coupling reactions

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highly active and reusable nanocatalysts for Suzuki–Miyaura cross-coupling reactions. Abstract: Addressed herein is the catalysis of monodisperse palladium nanoparticles (NPs) supported on chemically derived graphene (CDG) for the Suzuki–Miyaura cross-coupling of phenylboronic acid and various aryl halides.

4,4’-trimethylenedipiperidine as a nitrogen heterocycle solvent and/or catalyst: Liquid phase tandem Knoevenagel–Michael condensation

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Mechanochemical solvent-free and catalyst-free one-pot synthesis of pyrano[2,3-d]pyrimidine- 2,4(1H,3H)-diones with quantitative yields. doi: 10.3390/molecules14010474. Glycerol as a biodegradable and reusable promoting medium for the catalyst-free one-pot three component synthesis of 4H-pyrans. doi: 10.1039/c2gc35135h. Magnetic nanoparticles catalyzed synthesis of diverse N-heterocycles. doi: 10.1007/s z.

Cisco Catalyst LAN Switching

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The Catalyst 5000 chassis supports any of the past or present Catalyst 5000 line cards, including ATM LANE (Figure 6-11).. This number is by far the largest number of supported ports of any of the Catalyst 5000 series of switches. The Catalyst 5500 chassis is the largest of the Catalyst 5000 series, with a total of 13 slots. Like the rest of the Catalyst 5500 series of products, multiple. If not, the second slot can be configured with any of the Catalyst 5000 line cards.