نتایج جستجو برای: alumina methanesulfonic acid

تعداد نتایج: 757891  

Journal: :Fermentation 2023

γ-Valerolactone (GVL) is a platform chemical for the synthesis of both biofuels and biochemicals. The LA production from depithed sugarcane bagasse (DSB) resulted in 55% yield, resulting was used to produce GVL. effect process parameters, namely, temperature (25–200 °C), time (2–10 h), catalyst loading (0.5–5 g) were investigated GVL LA. Thereafter, optimized conditions derived yielded 77.6%. h...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2017
Manoj Kumar Joseph S Francisco

Although the role of methanesulfonic acid (HMSA) in particle formation in the gas phase has been extensively studied, the details of the HMSA-induced ion pair particle formation at the air-water interface are yet to be examined. In this work, we have performed Born-Oppenheimer molecular dynamics simulations and density functional theory calculations to investigate the ion pair particle formatio...

Journal: :Chemistry 2013
Jacorien Coetzee Deborah L Dodds Jürgen Klankermayer Sandra Brosinski Walter Leitner Alexandra M Z Slawin David J Cole-Hamilton

Hydrogenation of amides in the presence of [Ru(acac)3] (acacH=2,4-pentanedione), triphos [1,1,1-tris- (diphenylphosphinomethyl)ethane] and methanesulfonic acid (MSA) produces secondary and tertiary amines with selectivities as high as 93% provided that there is at least one aromatic ring on N. The system is also active for the synthesis of primary amines. In an attempt to probe the role of MSA ...

Journal: :MATEC web of conferences 2021

This paper systematically studied the pore structure, crystal phase, surface acidity and chemical environment of aluminum boron-doped γ-alumina, by impregnating boron in period boehmite. The nitrogen adsorption, XRD, FTIR etc. technique was used to determine texture, crystallography, acid/base properties coordination. XRD spectrum boria-alumina have no significant change due addition boron. spe...

Journal: :The Journal of biological chemistry 1979
K S Lee D G Drescher

Previous reports (Drescher, D.G., and Lee, K.S. (1978) Anal. Biochem. 84, 559-569; Lee, K.S., and Drescher, D.G. (1978) Int. J. Biochem. 9, 457-467) have shown that high performance liquid chromatographic analysis of amino acids with the o-phthaldialdehyde/2-mercaptoethanol reagent (OPA/2-ME) is one of the most sensitive procedures currently available for micro amino acid analysis. In the prese...

2011
S. Studzińska M. Molíková P. Kosobucki P. Jandera B. Buszewski

The nature of ionic liquids (ILs) facilitates their analysis by ion chromatography which, unlike conventional high-performance liquid chromatography, enables analysis both of cations and anions. This paper describes a pioneering ion-chromatographic investigation of IL cations and statistical evaluation of quantitative structure-retention relationships with the objective of predicting the molecu...

Journal: :Molecules 2010
Chunyan Zhang Shengyan Gong Li Zhang Daoquan Wang Mingan Wang

Using methanesulfonic acid as a catalyst, a series of cyclododeceno[b]indene derivatives were synthesized by the cyclization of alpha-benzylcyclododecanones, which were prepared by the reactions of cyclododecanones with a variety of substituted benzyl chlorides or bromides using NaH as a base. Their structures were confirmed by mp, IR spectra, 1H-NMR, 13C-NMR, MS, and x-ray diffraction. The pre...

Sadreddin Hosseini Timothy Su

A classical theory is developed which calculates the momentum transfer rate constant between an ion and a non-polar molecule. The model takes into consideration the effect of diffraction outside the capture limit on the rate constants. The theory is used to calculate momentum transfer rate constant for Cl- with trans-dichloroethylene and para-difluorobenzene. Theoretical results ...

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