Preparation of Pd-Cu Alloy Composite Membranes and Study on Membrane Reactor for Hydrogenation of Furfural to Furfuryl Alcohol
A STUDY ON TETRAHYDROFURAN Ⅰ Catalytic Decarbonylation of Furfural
A Study on Tetrahydrofuran Ⅱ A study of reaction system of decarbonylation of furfural and the decomposition reaction of furan on Cr-Zn-Mn oxides catalyst
STUDY OF THREE CHEMICAL ANALYTICAL METHODS FOR DETERMINATION OF FURFURAL CONTENT
STUDIES ON CONTINUOUS RECTIFICATION PROCESS OF FURFURAL——Technology of Producing High Grade Furfural (GB 1926-80)
The appropriate reaction conditions were as follows: furaldehyde was 10mL(122mmol), V( furaldehyde) ∶V(acetic anhydride)=1 ∶2,n( furaldehyde) ∶n(K 2CO 3)=1 ∶ 0.55 , PEG1000 was 4.3% of the furaldehyde mass as the best phase transfer catalyst, the power of microwave was 260W, the irradiation time was 11min, the yield was up to 72.3%.
较适宜的反应条件为 : 糠醛 10mL( 12 2mmol) ,V( 糠醛 )∶V(乙酸酐 ) =1∶2 ,n( 糠醛 )∶n(K2 CO3 ) =1∶0 .5 5 ,PEG10 0 0用量为 糠醛质量的 4 .3% ,微波辐射功率 2 6 0W ,辐射时间 11min ,产率 72 .3%。
Synthesis of the iron chelator 1-alky1-2-ethy1-3-hydroxypyridin-4-ones from furaldehyde
From the decoction a new compound was isolated and identified by UV,IR,MS and NMR as 5hydroxymethy2 furaldehyde (5HMF).
Synthesis of Propyl α-Furylacrylate by Furaldehyde
Amount of 2 furaldehyde were increased with the increase of acetic acid aqueous solution concentration from 0 to 3%,and almost constant from 3% to 30%.
Acid process (60％ H_2SO_4) is effective for raising α-cellulose content and lowering furfurol value.
酸法(60％ H_2SO_4)对提高α-纖維素、降低 糠醛值是有效的。
A Ncw Catalyst for Obtaining Furfuryl Alcohol by the Liquid Phase Hydrogenation of Furfurol
The causes for deactivation of the catalysts for liquid-phase hydrogenation of furfural to furfurol were investigated by means of XRF, XRD and SEM.
Hot alkaline and cold alkaline refinings are effective for raising α-cellulose content, but not effective for lowering furfurol value to below 5％.
The selectivity calculated shows that furfurol is an excellent extraction solvent for separating FCC slurry.
Development and application on LFT-95 furfuraldehyde hydrogenation catalyst for synthesis of dimethyl furan
Furfuryl alcohol was prepared from furfuraldehyde in ethanol solvent with hydrogenation reduction by using these Raney nickel or cobalt catalyst at 1.0～1.2MPa and 100～120℃.
This paper concerns the preparation of the Raney Co-Cr Catalyst made from the trinary alloy Co-Al-Cr in which the alloying A1 is dissolved in the soluvent NaOH. The Raney Co-Cr Catalyst is used in the hydropolymerization of furfuraldehyde as a new catalyst instead of the Metal Ni or CuO-Cr_2O_3 Catalyst.
本文提出用Co-Al-Cr三元合金溶提去Al,制备Raney Co-Cr合金材料,代替金属Ni或CuO-Cr_2O_3作为 糠醛加氢的新型催化剂。
Took 2.0ml of the solution and mixed with 1.0ml of 1% furfuraldehyde solution cooled, and sulfuric acid was added. After 10 minincubation at 70℃, it was cooled.
The optimum production conditions were as follows. n(Acetone)∶n( furfuraldehyde)=3 0∶1.0,m(catalyst)∶m(raw materials)=4.1∶100 0,reaction temperature was 40 ℃,and reaction time was 4.0 h. Under the optimum conditions,yield of furfural acetone could reach 87.8%.
对影响反应的因素作了考察 ,确定出反应的最佳工艺条件为 :n(丙酮 )∶n( 糠醛 ) =3 0∶1 0 ,m(催化剂 )∶ m(反应物 ) =4 1∶10 0 0 ,反应温度 40℃ ,反应时间 4 0h ,收率可达 87 8%。
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Heterocyclic compounds stimulating germination of endogenously dormant spores, such as furfural, failed to activate germination.
The contents of methanol, acetic and crotonic acids, and furfural increased considerably in the samples treated with hydrochloric acid.
Kinetics and mechanism of the furan peroxide formation in the reaction of furfural with hydrogen peroxide in the presence or abs
The kinetics of the initial stage of the furfural reaction with hydrogen peroxide was studied in water in the presence of Na2MoO4 and in n-butanol without a catalyst.
The mechanisms of furfural conversion in the Na2MoO4-H2O2 system and oxidation by hydrogen peroxide in the absence of sodium molybdate are discussed.
Polarographic Study of Reactions in the System 2- Furaldehyde-Hydrogen Peroxide-NaVO3
The oxidation of 2- furaldehyde to β-formylacrylic acid in 0.1 N HClO4 containing hydrogen peroxide and sodium vanadate was studied by polarography using a dropping mercury electrode.
The conversion of 2- furaldehyde and the yield of the products were found to depend on the reactant ratio.
The origin of 5-HMF (5-hydroxymethyl-2- furaldehyde) in a Shengmaiyin decoction was investigated by the RP-HPLC method below.
A rapid and sensitive method for determining 2- furaldehyde (FUR) and 5-hydroxymethyl-2- furaldehyde (HMF) in apple juices and juice concentrates has been developed.
The degrees of extraction for furfurol, 2-acetylfuran, and 5-methyl furfurol were above 95%, while that for hydroxymethyl furfurol ranged within 75-80%.
Use is made of results of experimental studies involving separation of an acetic acid‐water mixture and industrial data on rectification of furfurol and ethanol.
Industrial data on separation of furfurol-water and ethanol-water binary mixtures have been employed in the calculations.
Gewinnung von pentosanarmen Zellstoffen und Furfurol aus Rotbuchenholz
Die Gewinnung von Furfurol und pentosanarmen Zellstoffen aus Buchenholz gelingt auf folgendem Wege: Das Holz wird in Schnitzelform mit 20proz.
An enhanced method of HPLC for the determination of 5-Hydroxymethyl-2- furfuraldehyde (HMF) in fluid milk was perfected.
Elimination of spectral interferences in the reaction of 2-thiobarbituric acid with malonaldehyde, 2- furfuraldehyde and 5-hydrox
The spectral resolution of ternary mixtures of malonaldehyde (MLD), 2- furfuraldehyde (FUR) and 5-hydroxymethyl-2- furfuraldehyde (HMF) in the presence of glyoxal and biliverdine is achieved by partial least squares multivariate calibration (PLS).
Non-enzymatic browning reactions were studied in solutions of furfuraldehyde (decomposition product of sugars) and aniline (representative of simple aromatic amines, forming easily dark coloured condensation products).
After the analysis of Job the red product is composed of two molecules of aniline and three molecules of furfuraldehyde.