搜索结果: 1-15 共查到“化学反应工程 Silica”相关记录17条 . 查询时间(0.068 秒)
Ferric hydrogen sulfate supported on silica-coated nickel ferrite nanoparticles as new and green magnetically separable catalyst for 1,8-dioxodecahydroacridine synthesis
Magnetically separable catalyst Ferric hydrogen sulfate Nickel ferrite nanoparticles 1,8-Dioxodecahydroacridine
2014/3/8
A new magnetically separable catalyst consisting of ferric hydrogen sulfate supported on silica-coated nickel ferrite nanoparticles was prepared. The synthesized catalyst was characterized using vibra...
Silica-bonded N-propylpiperazine sodium n-propionate as recyclable catalyst for synthesis of 4H-pyran derivatives（图）
Silica-bonded n-propylpiperazine sodium n-propionate Heterogeneous solid base catalyst Aldehyde
2013/12/5
Silica-bonded N-propylpiperazine sodium n-propionate (SBPPSP) was found to act as an efficient solid base for the preparation of a series of 4H-benzo[b]pyran derivatives. SBPPSP was used as a recyclab...
Silica-Bonded N-Propylpiperazine Sodium n-Propionate as Recyclable Basic Catalyst for Synthesis of 3,4-Dihydropyrano[c]chromene Derivatives and Biscoumarins（图）
silica-bonded N-propylpiperazine sodium n-propionate silica-bonded N-propylpiperazine methyl n-propionate aromatic aldehydes 3,4-dihydropyrano[c]chromenes biscoumarins
2013/10/4
A simple and efficient procedure for the preparation of silica-bonded N-propylpiperazine sodium n-propionate (SBPPSP) by the hydrolysis of silica-bonded N-propylpiperazine methyl n-propionate (SBPPMP)...
Application of Amino-Functionalized SBA-15 Type Mesoporous Silica in One-Pot Synthesis of Spirooxindoles（图）
amino-functionalized SBA-15 spirooxindoles isatin nano-reactor green synthesis
2013/10/4
Amino-functionalized SBA-15 (SBA-Pr-NH2) has been used as a new basic nanocatalyst in the one-pot synthesis of spirooxindole derivatives via the three-component condensation reaction of isatins, activ...
Nano-Fe3O4 Encapsulated-Silica Particles Bearing Sulfonic Acid Groups as a Magnetically Separable Catalyst for Highly Efficient Knoevenagel Condensation and Michael Addition Reactions（图）
magnetic nanoparticle silica Knoevenagel condensation Michael addition cyclic diketone
2013/10/4
Sulfonic acid-functionalized silica-coated nano-Fe3O4 particles (Fe3O4@SiO2-SO3H) have been prepared as a novel heterogeneous acid using a facile process. The material was subsequently identified as a...
Well-Ordered Mesoporous Silica Nanoparticles as a Recoverable Catalyst for One-Pot Multicomponent Synthesis of 4H-Chromene Derivatives（图）
green synthesis multicomponent reactions 4H-chromene derivatives mesoporous silica nanoparticles
2013/10/4
A simple, efficient and environmentally benign protocol for the synthesis of 4H-chromene derivatives was developed using bio-compatible, neutral, and recoverable mesoporous silica nanoparticles as a c...
A Simple and Environmentally Benign Protocol for Biginelli Reactions Catalyzed by Silica-Bonded S-Sulfonic Acid（图）
Biginelli reaction silica-bonded S-sulfonic acid dihydropyrimidinone
2013/10/5
A protocol for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones and -thiones was developed by means of a three-component condensation of an aldehyde, a β-dicarbonyl compound, and urea or thiourea in a...
Photocatalytic Synthesis of Phenol by Direct Hydroxylation of Benzene by a Modified Nanoporous Silica (LUS-1) under Sunlight（图）
mesoporous silica photocatalyst phenol benzene hydroxylation sunlight nanoporous silica carbon nitride
2013/10/5
Fe-g-C3N4-LUS-1 was prepared by the thermal decomposition of dicyandiamide inside the pores of LUS-1 under an inert atmosphere. It was used as a photocatalyst for the hydroxylation of benzene to pheno...
Nano Silica with High Surface Area from Rice Husk as a Support for 12-Tungstophosphoric Acid: An Efficient Nano Catalyst in Some Organic Reactions（图）
amorphous silica heteropolyacid heterogeneous catalysis nano catalyst rice husk
2013/10/5
Nano silica was prepared from rice husk with high surface area. X-ray diffraction (XRD) pattern showed that the amorphous form of silica was produced. Chemical composition of the nano silica was estim...
Synthesis of 2-Amino-4,6-diarylnicotinonitriles Using Silica-Bound N-Propyl Triethylenetetramine Sulfamic Acid as a Recyclable Solid Acid Catalyst（图）
silica-bonded N-propyl triethylenetetramine sulfamic acid 2-amino-4,6-diarylnicotinonitrile pyridine aldehyde solvent-free
2013/10/5
A simple and efficient procedure for the preparation of silica-bound N-propyl triethylenetetramine sulfamic acid (SBPTETSA) by the reaction of silica-bound N-propyl triethylenetetramine (SBPTET) with ...
Silica-Bonded N-Propyl Diethylenetriamine Sulfamic Acid as a Recyclable Solid Acid Catalyst for the Synthesis of α-Aminonitriles（图）
silica-bonded N-propyl diethylenetriamine sulfamic acid α-aminonitrile solid acid aldehyde
2013/10/7
Silica-bonded N-propyl diethylenetriamine sulfamic acid (SBPDSA) is employed as a recyclable catalyst to synthesize α-aminonitriles. These syntheses involved one-pot condensation of an aldehyde, an am...
Liquid Phase Oxidation of Acetophenone over Rice Husk Silica Vanadium Catalyst（图）
vanadium rice husk silica oxidation acetophenone sol-gel technique
2013/10/8
Rice husk silica catalyst loaded with 10 wt% vanadium was synthesized from agricultural biomass via a sol-gel synthetic route at pH = 9. The catalyst was characterized by different physico-chemical me...
Alkylation of Benzene with 1-Decene Using Silica Supported Preyssler Heteropoly Acid: Statistical Design with Response Surface Methodology（图）
linear alkylbenzene heteropoly acid preyssler silica supported catalyst response surface method
2013/10/8
The response surface method (RSM) was applied to study the liquid phase alkylation of benzene with 1-decene catalyzed by means of silica supported preyssler heteropoly acid. A three step experimental ...
A Dynamic Organic Structuring-Directing Agent for Pure-Silica-Zeolite AST and LTA Syntheses（图）
zeolite synthesis dynamic structure-directing agent π-&pi conjugation Liebau’s rules
2013/10/9
Pure-silica-zeolite (PSZ) AST and LTA are synthesized successfully by using the same structure-directing agent (SDA) molecule, but at different concentrations. A dynamic organic SDA is proposed to dis...
Catalytic oxidation of CO and o-DCB over CuO/CeO2 catalysts supported on hierarchically porous silica
CuO/CeO2/HPS catalyst Catalytic oxidation CO o-DCB
2013/12/12
The CuO/CeO2 catalysts supported on hierarchically porous silica were prepared by sol–gel and multihydrothermal processes. The samples were characterized by TG–DTA, N2 adsorption–desorption, SEM, XPS ...