Topic
Methyl isobutyl ketone
About: Methyl isobutyl ketone is a research topic. Over the lifetime, 2071 publications have been published within this topic receiving 26976 citations. The topic is also known as: Hexone & Isobutyl methyl ketone.
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25 Jun 2004TL;DR: In this article, a birefringent material containing a non-liquid-crystal polymer is dissolved in methyl isobutyl ketone to obtain a coating solution, which is applied onto a transparent film so as to form a coating film, and this coating film is dried.
Abstract: A transparent optical film with very excellent optical properties, exhibiting uniform phase-contrast distribution and having the occurrence of rainbow unevenness suppressed. A birefringent material containing a non-liquid-crystal polymer is dissolved in methyl isobutyl ketone to thereby obtain a coating solution. This coating solution is applied onto a transparent film so as to form a coating film, and this coating film is dried. Thus, an optical film having a birefringent layer superimposed directly on the transparent film is obtained. As the non-liquid-crystal polymer, use can be made of a polyimide whose birefringence index (Δnxyz) in the direction of thickness when formed into a film is 0.03 or higher, the polyimide being soluble in methyl isobutyl ketone.
12 citations
TL;DR: In this paper, MCM-22 zeolites with different Si/Al ratios were dynamically synthesized through hydrothermal method, and the Pd/MCM 22 catalysts were prepared by ion-exchange method as well.
Abstract: MCM-22 zeolites with different Si/Al ratios were dynamically synthesized through hydrothermal method, and the Pd/MCM-22 catalysts were prepared by ion-exchange method as well. The physicochemical properties of the samples were well characterized by XRD, SEM, TEM, N2 adsorption, NH3-TPD, and FT-IR of d3-acetonitrile adsorption. MCM-22 synthesized was markedly different from those in previous literatures, showing much smaller crystals. MCM-22 with Si/Al ratio of 25 showed the highest crystallinity and concentration of Bronsted acid sites. The loading of Pd particles had little influence on the structural and porous properties of MCM-22 zeolite. The specific surface area, pore volume, pore diameter, and the concentrations of the acid sites all decreased with increasing Pd loading as expected. One-step synthesis of methyl isobutyl ketone from acetone was investigated over Pd/MCM-22 catalysts. An acetone conversion of 34.0% and a selectivity of 86.9% for MIBK were realized. The catalytic results also suggested that a proper balance between metallic and acidic sites was necessary for obtaining high catalytic performance.
12 citations
TL;DR: The separation and the purification of the acrylic acid produced from renewable sugars were studied using the liquid-liquid extraction process using nonrandom two-liquids and universal quasi-chemical models and the prediction method universal quasi -chemical functional activity coefficients.
Abstract: In this article, the separation and the purification of the acrylic acid produced from renewable sugars were studied using the liquid-liquid extraction process. Nonrandom two-liquids and universal quasi-chemical models and the prediction method universal quasi-chemical functional activity coefficients were used for generating liquid-liquid equilibrium diagrams for systems made up of acrylic acid, water, and solvents (diisopropyl ether, isopropyl acetate, 2-ethyl hexanol, and methyl isobutyl ketone) and the results were compared with available liquid-liquid equilibrium experimental data. Aspen Plus (Aspen Technology, Inc., version 2004.1) software was used for equilibrium and process calculations. High concentration of acrylic acid was obtained in this article using diisopropyl ether as solvent.
12 citations
TL;DR: The extraction of 211At into both methyl isobutyl ketone and 3-octanone showed a strong, linear dependence on the HNO3 initial aqueous concentration and better extraction than other solvents.
12 citations