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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TL;DR: In this article, malic acid was extracted from aqueous solution by different solvents with and without trioctylamine (TOA), and the results were reported as distribution coefficients ( K D ), loading factors ( T T ), stoichiometric loading factor ( T S ), separation factor ( S f ), and extraction efficiency ( E ).
46 citations
TL;DR: In this article, vanadium is extracted as vanadium cupferrate into a mixture of methyl isobutyl ketone and oleic acid (78:22, v/v) and the organic phase is aspirated to the flame.
46 citations
TL;DR: In this paper, phase equilibria governing the reactive extraction of citric acid from aqueous solution into solutions of tri-n-octylamine in the single solvents toluene, chloroform and methyl isobutyl ketone are investigated.
46 citations
TL;DR: Two spectrophotometric extraction methods specific for uranium were described in this paper, and the limit of sensitivity is 0.8 gamma for the dibenzoylmethane method.
Abstract: Two spectrophotometric extraction methods specific for uranium are described. Uranium as tetrapropylammonium uranyl trintrate is quantitatively separated from large quantities of diverse ions by extraction into methyl isobutyl ketone (4-methyl-2-penthnone) from an acid-deficient aluminum nitrate salting solution. Milligram levels are determined by a direct absorbance measurement of the trinitrate complex in the separated organic phase at 452 m alpha Microgram amounts are determined by adding dibenzoylmethane (1,3-dipbenyl- 1,3propanedione) in an ethyl alcohol -pyridine mixture to the separated organic phase and measuring the absorbance of the chelate at 415 m mu . The coefficient ofvariation is less than 1% at the 10-mg. and 25- gamma levels. The limit of sensitivity is 0.8 gamma for the dibenzoylmethane method. (auth)
45 citations
TL;DR: In this article, contrast curves for different molecular weight PMMA resists converge into a single curve at lower temperatures, and linewidth resolution and periodicity are invariant for the different PMMA molecular weights (50K to 2.2M).
Abstract: Poly(methylmethacrylate) (PMMA) with various molecular weights exposed using 50keV electron beam have been investigated at subzero developer temperatures. Contrast curves for Methyl Isobutyl Ketone (MIBK):Isopropyl Alcohol (IPA)=1:3 and MIBK:IPA=1:7 developers were determined. The contrast curves for different molecular weight PMMA resists converge into a single curve at lower temperatures. At low temperatures, the line edge roughness and resolution improved. However, minimum line pitch shows no significant improvement while dose latitudes for a particular line pitch increased. It is shown that at low temperatures, linewidth resolution and periodicity are invariant for the different PMMA molecular weights (50K to 2.2M) used in this work.Poly(methylmethacrylate) (PMMA) with various molecular weights exposed using 50keV electron beam have been investigated at subzero developer temperatures. Contrast curves for Methyl Isobutyl Ketone (MIBK):Isopropyl Alcohol (IPA)=1:3 and MIBK:IPA=1:7 developers were determined. The contrast curves for different molecular weight PMMA resists converge into a single curve at lower temperatures. At low temperatures, the line edge roughness and resolution improved. However, minimum line pitch shows no significant improvement while dose latitudes for a particular line pitch increased. It is shown that at low temperatures, linewidth resolution and periodicity are invariant for the different PMMA molecular weights (50K to 2.2M) used in this work.
45 citations