Efficient catalytic conversion of cellulose to levulinic acid in the biphasic system of molten salt hydrate and methyl isobutyl ketone

2020 ◽  
Vol 22 (13) ◽  
pp. 4240-4251 ◽  
Author(s):  
Jinghua Wang ◽  
Hongyou Cui ◽  
Yong Wang ◽  
Rongrong Zhao ◽  
Yujiao Xie ◽  
...  
Keyword(s):  
Molten Salt ◽  
Levulinic Acid ◽  
Methyl Isobutyl Ketone ◽  
Cellulose Hydrolysis ◽  
Biphasic System ◽  
Hydrolysis Reaction ◽  
Side Reactions ◽  
Methyl Isobutyl ◽  
Isobutyl Ketone ◽  
Salt Hydrate

The side reactions of saccharides and 5-hydromethyl furfural to form humins were suppressed by controlling the cellulose hydrolysis reaction to match the subsequent reactions.

Furfural production from birch hemicelluloses by two-step processing: a potential technology for biorefineries

Holzforschung ◽  
2016 ◽  
Vol 70 (10) ◽  
pp. 901-910 ◽  
Author(s):  
Sandra Rivas ◽  
Carlos Vila ◽  
Valentín Santos ◽  
Juan Carlos Parajó
Keyword(s):  
Single Phase ◽  
Methyl Isobutyl Ketone ◽  
Solid Phase ◽  
Empirical Modeling ◽  
Side Reactions ◽  
Methyl Isobutyl ◽  
Isobutyl Ketone ◽  
Operational Conditions ◽  
Extraction Agent ◽  
Furfural Production

Abstract Birch samples were subjected to non-isothermal autohydrolysis to obtain a solution of hemicellulosic saccharides and a solid phase mainly made up of cellulose and lignin. Based on kinetic modeling, operational conditions were identified which give rise to soluble saccharides and furfural derived from xylan in a yield of 80.5%. The soluble mixture was supplemented with 1% sulfuric acid and heated (directly or in the presence of methyl isobutyl ketone, MIBK) for furfural production. MIBK is used as an extraction agent to limit furfural consumption by side reactions. Operating in single phase at 170°C, up to 44.8% of the potential substrates were converted into furfural. In experiments performed in biphasic media, the effects of MIBK were assessed by empirical modeling and about 75% of the potential substrates were converted under selected conditions.

Determination of Some Nitrophenols by Atomic Absorption Spectrometry (AAS) After Extraction of Ionic Associates Involving the Bipyridylocopper(II) or Phenanthrolinocopper(II) Complex

1994 ◽  
Vol 59 (10) ◽  
pp. 2227-2234 ◽  
Author(s):  
Václav Stužka ◽  
Jaromír Souček
Keyword(s):  
Molecular Weight ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Methyl Isobutyl Ketone ◽  
Absorption Spectrometry ◽  
Methyl Isobutyl ◽  
Isobutyl Ketone ◽  
Indirect Determination ◽  
Ionic Associates

A new method has been developed for the indirect determination of nitroso- and nitrophenols by atomic absorption spectrometry (AAS) after extraction of ionic associates involving bipyridylocopper(II) (CuDP) or phenanthrolinocopper(II) (CuPH) complexes. Nitrobenzene and methyl isobutyl ketone appeared to be suitable for the extraction. It was possible to determine several tenths to hundredths of a milligram of nitrophenol in a litre. Extractable associates with CuDP and CuPH are formed by phenols possessing two substituents or by higher molecular weight phenols such as naphthol or hydroxyquinoline. Monosubstituted phenols fail to form associates of this kind.

Ce and Ca/Nb doped Pd-mesocellular foam catalysts for gas-phase conversion of acetone to methyl isobutyl ketone

2021 ◽  
pp. 111169
Author(s):  
Kalina Grzelak ◽  
Rouzana Pulikkal Thumbayil ◽  
Søren Kegnæs ◽  
Maciej Trejda ◽  
Anders Riisager
Keyword(s):  
Gas Phase ◽  
Methyl Isobutyl Ketone ◽  
Phase Conversion ◽  
Methyl Isobutyl ◽  
Isobutyl Ketone

Ternary vapour-liquid equilibria in the system: benzene-cyclohexane-methyl isobutyl ketone

1958 ◽  
Vol 9 (1) ◽  
pp. 69-73 ◽  
Author(s):  
P. Dakshinamurty ◽  
G. Jayarama Rao ◽  
M.V.R. Acharya ◽  
C. Venkata Rao
Keyword(s):  
Methyl Isobutyl Ketone ◽  
Methyl Isobutyl ◽  
Isobutyl Ketone
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