Some Physical Properties of Diacetone Alcohol, Mesityl Oxide and Methyl Isobutyl Ketone

Mesityl oxide is standardly used to produce methyl iso butyl ketone but it can be also used to produce other useful compounds. Three catalysts were used for the reaction of the mesityl oxide reduction. They were NiW, NiMo, and CoMo supported on phonolite modified by HCl (metals/Ph-HCl). The fresh catalysts were characterized by XRD, XRF, BET surface, Hg porosimetry, SEM, H2-TPR, NH3-TPD, CO2-TPD. The materials were directly used, previously reduced in H2 or sulfided for the mesityl oxide reduction under H2 atmosphere. The reaction was performed in an autoclave at T = 375 °C, p = 50 bar (H2), and TOS = 1.5 h. The products were analyzed by GC/MS, GC/FID-TCD, ATR. The main products were methyl isobutyl ketone, 2-methyl pentane, and 2-methyl-2-pentene. Sulfided metal catalysts were the most active in the methyl isobutyl ketone, where the NiWSx/Ph-HCl catalyst showed the highest activity. For the non-previously-activated and hydrogen activated catalysts the most active catalyst was the NiMo/Ph-HCl for the production of methyl isobutyl ketone. The catalyst CoMo/Ph-HCl activated in hydrogen was the most active for the production of 2-methyl pentane compared to the other two hydrogen-activated materials.

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STUDY OF THE PROCESS OF HYDRATION OF MESITYL OXIDE IN THE PRESENCE OF NANOCATALYZERS

IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY ◽

10.35211/1990-5297-2021-12-259-46-49 ◽

2021 ◽

pp. 46-49

Author(s):

D. N. Nebykov ◽

Yu. V. Popov ◽

V. M. Mokhov ◽

E. V. Shepotko ◽

D. S. Kos'yanenko

Keyword(s):

Aqueous Solution ◽

Nickel Catalyst ◽

Methyl Isobutyl Ketone ◽

Catalyst System ◽

Mesityl Oxide ◽

Solid Catalyst ◽

Complete Conversion ◽

Methyl Isobutyl ◽

Isobutyl Ketone ◽

Displacement Reactor

The process of mesityl oxide hydrogenation in the presence of a nickel catalyst prepared by impregnating a support with an aqueous solution of the corresponding salt in a displacement reactor in a gas-liquid-solid catalyst system has been studied. It has been established that the use of the catalyst used in the work makes it possible to selectively obtain methyl isobutyl ketone with complete conversion of mesityl oxide in the temperature range 70-100 ºС.

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

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19942227 ◽

1994 ◽

Vol 59 (10) ◽

pp. 2227-2234 ◽

Cited By ~ 2

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.

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