搜索结果: 1-15 共查到“催化反应工程 catalyst”相关记录49条 . 查询时间(0.109 秒)
ZnAl2O4@SiO2 nanocomposite catalyst for the acetylation of alcohols, phenols and amines with acetic anhydride under solvent-free conditions
Spinel-type oxide Zinc aluminate Silica Sol-gel process Nanocomposite Heterogeneous catalyst Acetylation Solvent-free condition
2014/3/8
A ZnAl2O4@SiO2 nanocomposite was prepared from metal nitrates and tetraethyl orthosilicate by the sol-gel process, and characterized by X-ray diffraction, Fourier transform infrared, transmission elec...
An electrode with Ni(Ⅱ) loaded analcime zeolite catalyst for the electrooxidation of methanol
Analcime zeolite Modified electrode Methanol Cyclic voltammetry Electrocatalytic oxidation
2014/3/8
There is a high overvoltage in the oxidation of methanol in fuel cells, and so modified electrodes are used to decrease it. A modified electrode that used Ni(Ⅱ) loaded analcime zeolite to catalyze the...
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...
An efficient one-pot three-component synthesis of tetrahydrobenzo[b]pyran and 3,4-dihydropyrano[c]chromene derivatives using starch solution as catalyst
Tetrahydrobenzo[b]pyran Dihydropyrano[c]chromene Starch solution
2014/3/8
Tetrahydrobenzo[b]pyran and 3,4-dihydropyrano[c]chromene derivatives were synthesized via a one-pot three-component condensation of aromatic aldehydes with malononitrile and dimedone or 4-hydroxycouma...
Boehmite nanoparticle catalyst for the one-pot multicomponent synthesis of 3,4-dihydropyrimidin-2-(1H)-ones and thiones under solvent-free conditions
Boehmite nanoparticle One-pot synthesis Multicomponent synthesis Dihydropyrimidine Solvent-free
2014/3/8
A simple, green, and efficient synthesis protocol for the synthesis of 3,4-dihydropyrimidin-2-(1H)-ones using boehmite nanoparticles as catalyst was developed. It did not use any toxic metal catalysts...
Poly(4-vinylpyridinium) perchlorate as an efficient solid acid catalyst for the chemoselective preparation of 1,1-diacetates from aldehydes under solvent-free conditions
Poly(4-vinylpyridinium) perchlorate Chemoselective Supported catalyst Acylation Aldehyde
2014/3/8
Poly(4-vinylpyridinium) perchlorate has been used as a supported, recyclable, environmentally-benign catalyst for the formation of acylals from aliphatic and aromatic aldehydes in good to excellent yi...
Poly(vinyl chloride)-supported Pd(Ⅱ) complex as an efficient catalyst for Heck and Cu-free Sonogashira reactions under aerobic conditions
Heck reaction Sonogashira reaction Aryl halide Poly(vinyl chloride)-anchored palladium(Ⅱ) dithizone complex
2014/3/8
A novel poly(vinyl chloride)-supported Pd complex was found to be a highly active catalyst for the Heck and Sonogashira reactions of aryl halides under aerobic conditions. The complex is thermally sta...
SiO2-Cu2O：An efficient and recyclable heterogeneous catalyst for N-benzylation of primary and secondary amines
Silica supported copper(I) oxide Benzylation Substituted amine Recyclability Heterogeneous catalysis
2014/3/9
A mild, effective, and selective procedure is reported for the mono N-benzylation and N,N-dibenzylation of primary amines as well as mono N-benzylation of secondary amines using silica-supported coppe...
Effects of Bi and Ni on the properties of a vanadium phosphorus oxide catalyst
Vanadium phosphorus oxide catalyst Promoter n-Butane oxidation Maleic anhydride selectivity
2014/3/11
Vanadium phosphorus oxide (VPO) catalysts were synthesized by the dihydrate method which involved the two steps for the preparation of the dihydrate (VOPO4×2H2O) and the precursor hemihydrate (VOHPO4×...
Tribromo melamine as novel and versatile catalyst for the formylation and acetylation of alcohols
Tribromo melamine Acetylation Formylation Alcohol Ethyl formate Acetic anhydride
2014/3/11
Tribromo melamine has been found to be an efficient and green organocatalyst for the acetylation and formylation reactions of alcohols with acetic anhydride and ethyl formate at room temperature and u...
Nanocrystalline titanium dioxide catalyst for the synthesis of azlactones
Nanocrystalline titanium dioxide Electrochemical reduction method Cyclodehydration-condensation Heterogeneous catalyst
2014/3/9
Titanium dioxide nanoparticles were prepared by a electrochemical reduction method using parameters such as current density, solvent polarity, distance between electrodes, and concentration of stabili...
Poly(4-vinylpyridinium)hydrogen sulfate: A novel and efficient catalyst for the synthesis of 13-aryl-indeno[1, 2-b]naphtha[1, 2-e]pyran-12(13H)-ones under solvent-free conditions
Poly(4-vinylpyridinium)hydrogen sulfate Indenonaphthopyrans, H-indene-1,3-dione β-Naphthol
2014/3/11
An facile and efficient protocol for the synthesis of 13-aryl-indeno[1,2-b]naphtha[1,2-e]pyran- 12(13H)- ones has been developed that proceeds via the one-pot three-component sequential reaction of an...
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...
Aldol condensations of a variety of different aldehydes and ketones under ultrasonic irradiation using poly(N-vinylimidazole) as a new heterogeneous base catalyst under solvent-free conditions in a liquid-solid system Nader Ghaffari Khaligha, Taraneh Mihankhahb（图）
Ultrasound-assisted reaction Liquid-solid system Poly(N-vinylimidazole) Aldol condensation, Solvent-free
2013/12/5
An ultrasound-assisted aldol condensation reaction has been developed for a range of ketones with a variety of aromatic aldehydes using poly(N-vinylimidazole) as a solid base catalyst in a liquid-soli...
Rice husk ash supported FeCl2·2H2O：A mild and highly efficient heterogeneous catalyst for the synthesis of polysubstituted quinolines by Friedländer heteroannulation（图）
Rice husk ash Supported FeCl2·2H2O, Quinolines 2-Amino benzophenone Solvent-free Friedlä nder heteoannulation
2013/12/5
Rice husk ash was used as a new, green, and cheap adsorbent for FeCl3. Characterization of the obtained reagent showed that rice husk ash supported FeCl2·2H2O was formed. This reagent is efficient at ...