Showing papers on "Methyl isobutyl ketone published in 1982"
TL;DR: Piperazinomycin showed inhibitory activity against fungi and yeasts, especially against Trichophyton, which is of basic and lipophilic nature and can be extracted with methyl isobutyl ketone at alkaline pH.
Abstract: A new antifungal antibiotic, named piperazinomycin, was isolated from the cultured broth of Streptoverticillium olivoreticuli subsp. neoenacticus. The antibiotic was obtained from the mycelial cake by extraction with methanol and also from the broth filtrate by adsorption on Amberlite XAD-2 and subsequent elution with aqueous acetone. The antibitoic is of basic and lipophilic nature and can be extracted with methyl isobutyl ketone at alkaline pH. Its purification was carried out by column chromatography on Sephadex LH-20 and then on Sephadex G-15 followed by preparative thin-layer chromatography on silica gel. The molecular formula of piperazinomycin was determined to be C125H20NsO2 by high resolution mass spectrum and the spectroscopic and chemical properties were examined. Piperazinomycin showed inhibitory activity against fungi and yeasts, especially against Trichophyton.
60 citations
TL;DR: In this paper, the reaction of methyl n-propyl ketone with N-bromosuccinimide was studied in perchloric acid media in presence of mercuric acetate.
41 citations
TL;DR: In this paper, the authors used acid digestion, extraction of thallium(III) from 0.5 M HBr solution into methyl isobutyl ketone and direct electrothermal atomic absorption spectrometry.
31 citations
TL;DR: In this article, five laboratory solvent extraction methods for the determination of leachable trace metals from municipal incinerator fly and bottom ashes are evaluated, and the trace elements of interest were cadmium, chromium, copper, manganese and lead.
Abstract: Five laboratory solvent extraction methods for the determination of leachable trace metals from municipal incinerator fly and bottom ashes are evaluated. The trace elements of interest were cadmium, chromium, copper, manganese and lead. Five different extractants, 0.1NHCl, 1.0 N ammonium acetate, methyl isobutyl ketone (MIBK), chloroform and hexane were used on each ash to determine comparative extraction efficiencies. Extraction efficiencies of the five solvents were determined based on total metal concentration, and were found to rank in the following order: 0.1NHCl<1.0N ammonium acetate < MIBK < chloroform < hexane. No one solvent was optimal for obtaining environmentally available values for all five metals. The inorganic solvents, 0.1NHCl and 1.0N ammonium acetate, exhibited higher removal of trace metals from ash particles relative to the organic solvents. Manganese concentrations were removed more efficiently by 0.1NHCl, whereas 1.0 N ammonium acetate was more efficient for removing copper...
29 citations
TL;DR: An assay was developed that made use of Schiff base formation with methyl isobutyl ketone and gas chromatography with nitrogen-selective detection for biopharmaceutical and pharmacokinetic purposes and compared favourably with a liquid chromatography assay.
20 citations
TL;DR: Qualitative and quantitative analysis of tissues and body fluids for multiple volatile organic compounds were performed by a combination of packed and open tubular capillary GC and GC/MS in a case involving the exposure of two persons to methyl ethyl ketone, methyl isobutyl ket one, toluene and the three isomeric xylenes.
Abstract: Qualitative and quantitative analysis of tissues and body fluids for multiple volatile organic compounds were performed by a combination of packed and open tubular capillary GC and GC/MS. This paper describes methods for such analyses in a case involving the exposure of two persons to methyl ethyl ketone, methyl isobutyl ketone, toluene and the three isomeric xylenes. Tissue and body fluid concentrations of these substances in the two decedents are presented and discussed briefly.
14 citations
Patent•
06 Mar 1982
TL;DR: In this paper, an organotrichlorosilane is dissolving in a ketone or ether, adding water to the solution to effect hydrolysis, and condensing the product.
Abstract: PURPOSE:To prepare the titled resin having high molecular weight and excellent storage stability and soluble in organic solvents, by dissolving an organotrichlorosilane in a ketone or ether, adding water to the solution to effect hydrolysis, and condensing the product. CONSTITUTION:1pt.vol. Of CH3SiCl3 or a mixture of 1mol of CH3SiCl3 and <1mol, pref. <=0.3mol of RR'SiCl2 (R and R' are 1-3C alkyl, vinyl or aryl) is dissolved in pref. 5-20pts.vol. of a ketone such as methyl isobutyl ketone or an ether such as dioxane, and hydrolyzed by adding about 3-30mol of water, based on 1mol of the silanes used as the raw material, slowly under stirring. Afte the hydrolysis, the product is condensed by heating at 100-120 deg.C for 2-6hr. The reaction can be carried out smoothly by adding pref. 0.3-2mol of an amine such as triethylamine to 1mol of the silanes to be used as the raw material. After the reaction, the organic solvent phase is washed with water, dried, and poured into a solvent which does not dissolve the products, e.g. acetonitrile, etc., to obtain the silicone resin.
12 citations
TL;DR: The characteristics of the mixed-ligand iron(III)-fluoride-purpurin complex, including optimum conditions of formation and extraction into methyl isobutyl ketone are described, and the method is suitable for determining iron in the presence of large amounts of aluminium, cyanide, phosphate and nickel.
12 citations
Patent•
01 Mar 1982
TL;DR: In this article, a monosecondary amine containing blocked primary amine groups is provided by reacting the amine with a ketone to prevent reaction with secondary amino hydrogen atom (such as methyl isobutyl ketone).
Abstract: A monosecondary amine containing blocked primary amine groups is provided by reacting a monosecondary amine containing at least one primary amine group (such as diethylene triamine) with a ketone which is hindered to prevent reaction with secondary amino hydrogen atom (such as methyl isobutyl ketone) while removing water. This product disperses in water with the aid of a solubilizing acid to provide a solution which will emulsify a liquid polymer dispersed therein. The water hydrolyzes the blocked primary amine groups to restore reactivity. This product can also be reacted with 1,2-oxirane or isocyanate-functional polymers to provide products which are dispersible in water with a solubilizing acid. These dispersions will electrodeposit at the cathode.
10 citations
TL;DR: In this article, liquid-liquid equilibrium data obtained over the temperature range 10-60°C for the binary system water + methyl isoamyl ketone (MIAK) are presented together with ternary data for the system water+ acetic acid + MIAK at 15, 25 and 40°C.
9 citations
TL;DR: In this article, the separation of niobium and tantalum from each other and of these from other elements by extraction chromatography, has been investigated by the radiotracer technique.
Abstract: The separation of niobium and tantalum from each other and of these from other elements by extraction chromatography, has been investigated by the radiotracer technique. Columns made of polyurethane foam pretreated with diantipyrylmethane, tri-n-butyl phosphate, and methyl isobutyl ketone were employed. The separation was carried out in HF and HF/H2SO4 media. A quantitative separation was achieved for all elements investigated.
TL;DR: A mixed-ligand complex of vanadium(V) with N-benzohydroxamic acid and thiocyanate formed at various acidities can be extracted into methyl isobutyl ketone, and used for photometric determination of trace amounts ofVanadium in materials such as alloy steels and rocks.
Patent•
03 Mar 1982
TL;DR: In this article, a 2-methylquinoline adduct with urea is decomposed in the presence of an aqueous solution of a nonionic surfactant, e.g. polyoxyethylene octyl phenol ether, having an HLB of 13-14, preferably in a concentration of 0.01-0.40%, and an alkybvenzene or methyl isobutyl ketone, which will dissolve the aqueously solution of the surfactants and 2- methylquinoline but is substantially insoluble in water under heating to
Abstract: PURPOSE:To obtain the titled compound, by separating 2-methylquinoline capable of readily forming an adduct with urea from quinoline, isoquinoline, 8-methylquinoline, etc. in the form of the adduct, purifying the adduct, and decomposing the purified adduct in an aqueous solution of a surfactant under heating. CONSTITUTION:A 2-methylquinoline adduct with urea is decomposed in the presence of an aqueous solution of a nonionic surfactant, e.g. polyoxyethylene octyl phenol ether, having an HLB of 13-14, preferably in a concentration of 0.01- 0.40%, preferably in the presence of a solvent, e.g. an alkybvenzene or methyl isobutyl ketone, which will dissolve the aqueous solution of the surfactant and 2- methylquinoline but is substantially insoluble in water under heating to give the 2- methylquinoline. USE:A raw material for a quinophthalone dye or pigment.
Patent•
04 Feb 1982
TL;DR: In this article, a polyurethane resin having an improved sealing effect against fouling matter from the base material, comprising an isocyanate prepolymer obtained by the reaction between a polyether polyol and a polymethylene polyphenyl isOCyanate, and a diluting solvent, is presented.
Abstract: PURPOSE:A polyurethane resin having an improved sealing effect against fouling matter from the base material, comprising an isocyanate prepolymer obtained by the reaction between a polyether polyol and a polymethylene polyphenyl isocyanate, and a diluting solvent CONSTITUTION:A polyether polyol, MW 200-3,000, is used as a polyol component This compound is reacted with a polymethylene polyphenyl isocyanate to yield an isocyanate prepolymer having a free isocyanate group content of 10-25%, based on the weight of resin solids Next, the moisture-curing polyurethane resin of the purpose is obtained by diluting the prepolymer with a diluting solvent to form a resin solution having a concentration of, preferably, about 30-60wt% The diluting solvents which are used include, for example, toluene, ethyl acetate, and methyl isobutyl ketone
Patent•
04 Feb 1982
TL;DR: In this article, a polyglycidyl ether is dissolved in a specific mixed solvent which is inmiscible with water and an excessive amount of aqueous alkali is added thereto to reduce the content of saponifiable chlorine dispersed therein.
Abstract: PURPOSE: Polyglycidyl ether is dissolved in a specific mixed solvent which is inmiscible with water and an excessive amount of aqueous alkali is added thereto to reduce the content of saponifiable chlorine dispersed therein. CONSTITUTION: Polyglycidyl ether or polyfunctional glycidyl ether bearing 3 or more epoxy groups, which is obtained by reaction of polyvalent phenol in the presence of aqueous sodium hydroxide and contains 0.3W10wt% saponifiable chlorine, is dissolved in a solvent mix consisting of 10W70wt% of methyl ethyl ketone and 90W30wt% of methyl isobutyl ketone. Then, an excessive amount of an alkali compound such as aqueous sodium hydroxide is added to effect dehydrochlorination reaction and saponified chlorine formed is removed by washing with water. EFFECT: The present process permits the improvement in curability, heat resistance and arc resistance of the product as an electrical material. COPYRIGHT: (C)1983,JPO&Japio
Patent•
21 Oct 1982
TL;DR: In this paper, a dihydric phenol with epichlorohydrin in an organic solvent (e.g., methyl isobutyl ketone) was used to obtain a colorless titled resin.
Abstract: PURPOSE:To prepare the colorless titled resin, in high yeild, by adding an aqueous solution of an alkali metal hydroxide in two stages to the reaction system during the reaction of a dihydric phenol with epichlorohydrin in an organic solvent. CONSTITUTION:A dihydric phenol (e.g. bisphenol A) and 0.5-0.8mol of epichlorohydrin (based on 1 equivalent of the phenolic hydroxyl group) are dissolved in an organic solvent (e.g. methyl isobutyl ketone). The amount of the solvent is 30- 70wt% of bisphenol A. 0.15 Equivalent of an aqueous solution of an alkali metal hydroxide (based on 1 equivalent of the phenolic hydroxyl group) is added to the above solution in the absence of oxygen (in an inert gas atmosphere) and made to react e.g. at 50-80 deg.C (preferably 60-70 deg.C) for 1-2hr to obtain a resin solution. The resin solution is further incorporated slowly with 0.50-0.70 equivalent of an aqueous solution of an alkali metal hydroxide and made to react e.g. at 60-100 deg.C (preferably 80-90 deg.C) for 1-3hr to obtain the objective resin.
TL;DR: A simple, sensitive procedure for extractive spectrophotometric determination of nickel has been developed in this paper, where the authors show that at pH 8.5, nickel reacts with purpurin to form a 1:1 red complex, extractable in methyl isobutyl ketone.
Patent•
10 Feb 1982
TL;DR: In this article, the authors proposed a method to prevent the polymerization of acrylic acid and obtain the acrylic acid in high yield in a process of separating acetic acid as an impurity in the crude acrylic acid by the distillation, by adjusting the concentration ratio between the water and acrylic acid contained in the overhead distillate of a distillation column.
Abstract: PURPOSE: To prevent the polymerization of acrylic acid and obtain the acrylic acid in high yield in a process of separating acetic acid as an impurity in the crude acrylic acid by the distillation, by adjusting the concentration ratio between the water and the acrylic acid contained in the overhead distillate of a distillation column. CONSTITUTION: A reaction product gas obtained by catalytically oxidizing propylene and/or acrolein in the vapor phase is introduced from a line 1 into an absorber 2, where the reaction product is condensed or absorbed in water to give a liquid phase containing 5W55wt%, preferably 20W50wt%, acrylic acid. The resultant liquid is then introduced into an extraction column 4 and extracted with an extractant, e.g. methyl isobutyl ketone. The resultant extract is then fed to a distillation column 7 for separating the extractant, and crude acrylic acid, containing acetic acid, etc., and obtained from the bottom is fed to a distillation column 10 for separating the acetic acid. The acetic acid is obtained from the top, and the acrylic acid containing no acetic acid is obtained from the bottom. The distillation in the distillation column 10 is carried out by adjusting the concentration ratio between the water and the acrylic acid contained in the overhead distillate acetic acid of the distillation column 10 to ≤0.30, preferably ≤0.20, by weight. COPYRIGHT: (C)1983,JPO&Japio
Patent•
03 Apr 1982
TL;DR: In this article, a side grinder was used to extract high recording density and output characteristics of hexagonal ferrite powder as a magnetic recording medium by treating the powder surface with a specified phosphoric ester surfactant.
Abstract: PURPOSE:To enhance the high recording density and output characteristics of hexagonal ferrite powder as a magnetic recording medium by treating the powder surface with a specified phosphoric ester surfactant CONSTITUTION:In a side grinder 100ptswt magnetic powder of hexagonal Ba ferrite having 001-03mum particle size, 100ptswt deionized water and 4ptswtat least 1 kind of phosphoric ester surfactant represented by formulaIor II (where R is 2-12C hydrocarbon, and n in 3-9) are dispersed and mixed for 2hr The mixture is dried with a spray dryer to form powder, and 75wt% this powder is put in a resin soln consisting of 75ptswt 1:1 mixed sonl of methyl isobutyl ketone and toluene and of 17ptswt vinyl chloride-vinyl acetate copolymer They are milled with a ball mill for 40hr, and the resulting material is applied to a polyester film and oriented to manufacture a magnetic recording medium with superior high recording density and output characteristics
Patent•
13 Jul 1982
TL;DR: In this paper, a positive type resist which is dissolved and removed by the cutting of the principal chain when irradiated is developed, it is first developed with a developer with higher solubility such as methyl acetate for about 30sec and then developed with developer with lower solubilities prepared by mixing ethyl acetate with methyl isobutyl ketone in 3:7wt. ratio for 3min.
Abstract: PURPOSE:To accurately form a micropattern with a small amount of developers in a short time by developing a positive type radiation resist film to an intermediate state with a developer with higher solubility in a short time and to the final state with a developer with lower solubility. CONSTITUTION:When a positive type resist which is dissolved and removed by the cutting of the principal chain when irradiated is developed, it is first developed with a developer higher solubility such as methyl acetate for about 30sec and then developed with a developer with lower solubility prepared by mixing ethyl acetate with methyl isobutyl ketone in 3:7wt. ratio for 3min. The resist includes ''MPR '' of MATSUSHITA DENKI K.K. using a mixed resist consisting of methyl methacrylate, methacrylic acid and tripropylene glycol diepoxide. By making use of only the developer with higher solubility, the resist can be developed in about 1min, yet the unexposed part is also dissolved to cause lower pattern accuracy. The development with only the developer with lower solubility requires 12min. By this developing method the pattern accuracy is maintained, and the developing time is shortened considerably. A micropattern is developed with high resolution, and the total amount of used developers is reduced.
Patent•
11 Jan 1982
TL;DR: In this paper, an azacrown compound shown by the formula I (n is 0 or 1) was reacted with 2-hydroxy-5-nitrobenzyl bromide in methyl isobutyl ketone or tetrahydrofuran in the presence of a base.
Abstract: NEW MATERIAL:An azacrown compound shown by the formula I (n is 0 or 1). EXAMPLE:4,10-Bis (2-hydroxy-5-nitrobenzyl )-1, 7, 13-trioxa-4,10-diaza-cyclopentadecane(n=0). USE:An extracting agent for extracting and separating selectively calcium ion from a mixed solution of various kinds of metal ions with a solvent and an agent for determining a calcium ion in an aqueous solution by absorptiometric method. PROCESS:A compound shown by the formula II is reacted with 2-hydroxy-5-nitrobenzyl bromide in methyl isobutyl ketone or tetrahydrofuran in the presence of a base, to give easily a compound shown by the formula I which is light yellow solid, slightly soluble in water, readily soluble in organic solvents, especially reacting with calcium ion to form a stable yellow complex which is also insoluble in water and soluble in organic solvents.
Patent•
05 Nov 1982
TL;DR: In this paper, a pattern is drawn on a resist composition made of polyglycidyl methacrylate (PGMA) with electron beams, developed with 10:2 soln.
Abstract: PURPOSE:To increase the remaining rate after development in pattern formation in which descumming is carried out by irradiating far ultraviolet rays after drawing a pattern with electron beams, by using a specified developer different from the 1st developer as the 2nd developer. CONSTITUTION:A pattern is drawn on a resist composition made of polyglycidyl methacrylate (PGMA) or GMA-methyl methacrylate copolymer with electron beams, developed with 10:2 soln. of acetone:methanol, uniformly irradiated with far ultraviolet rays, and further developed with 1:1 soln. of acetone:methanol. The combination of developers such as 10:4 soln. of methylcellosolve acetate (MCA):methanol (the 1st time) with methyl isobutyl ketone (the 2nd time) or 10:2 soln. of acetone:methanol (the 1st time) with 4:6 soln. of MCA:methanol (the 2nd time) may be used.
TL;DR: In this paper, a standard method involving chelation of lead with ammonium pyrrolidinedinedithiocarbamate and extraction into methyl isobutyl ketone was investigated as to the effect of the pH of chelation on the absorbance and stability of the extracted lead.
Patent•
11 Jan 1982
TL;DR: In this article, a porcine liver esterase was used to prepare a novel compound by hydrolyzing dl-3-acetoxy-2-allyl- 3-hydroxy-3 -methyl-4-cyclopentenone.
Abstract: PURPOSE:To prepare the titled novel compound, by hydrolyzing dl-3-acetoxy-2- allyl-3-methyl-4-cyclopentenone with porcine liver esterase CONSTITUTION:dl-3-Acetoxy-2-allyl-3-methyl-4-cyclopentenone shown by the formula is hydrolyzed with porcine liver esterase with stirring in a buffer solution in a pH of 6-9 at about 20-40 degC for 10-40hr The amount of porcine liver esterase used is 05-30wt% based on raw material acetate, and the concentration of the raw material acetate is 1-30wt% After the reaction is over, the hydrolyzate solution is extracted with a solvent such as methyl isobutyl ketone, ethyl acetate, cyclomethane, the solvent is distilled from the prepared organic layer, and the residue is treated by column chromatography, to isolate the desired l(-)-2-allyl-3-hydroxy-3-methyl-4-cyclopentenone
TL;DR: Ru(III)-thiocyanate has been extracted with hexamethylphosphoramide (HMPA) in methyl isobutyl ketone (MIBK) as mentioned in this paper.
Abstract: Ru(III)-thiocyanate has been extracted with hexamethylphosphoramide (HMPA) in methyl isobutyl ketone (MIBK). Thus the extractability, sensitivity and selectivity are improved over the simple binary Ru(III) thiocyanate system in spectrophotometric determination of ruthenium in the organic phase. The maximum colour develops on the steam bath, at the acidity range of 1.5–2.5M with HCl and ammonium thiocyanate concentration range of 0.25–0.5M. The colour is completely extractable in MIBK when 1.5–3.0 ml HMPA is used and show maximum absorbance at 570 nm. The colour system obeys Beer's law for 0.7–13 νg Ru/ml and the optimum concentration range is 2–13 νg/ml. The molar absorptivity and sensitivity are 69401-mole−1 cm−1 and 0.0145 νg/cm2 respectively. The percent relative error is 2.72%. The method is very simple and does not require oxidation and subsequent distillation. The method can be applied in the presence of osmium.
01 Jan 1982
TL;DR: In this article, the authors used methyl isobutyl ketone and ion exchange column chromatography to extract 52 Fe and achieved the highest radionuclide purity in the world.
Abstract: There are many potential applications for radioactive iron in nuclear medicine. However, only 52 Fe has the physical characteristics that will allow in vivo visualization of its distribution (γ = 169 KeV, β + , t 1/2 = 8.3 h). Many reactions can be utilized for production: 50 Cr( 4 He, 2n), 52 Cr( 3 He, 3n), 55 Mn(p, 4n), 54 Fe(γ, 2n) and p, spallation. The energy and type of accelerated particle determines the method chosen for production. The reaction chosen should be the one that produces the most 52 Fe and minimum 55 Fe, significantly adds to the radiation dose received by the patient. Solvent extraction of the 52 Fe utilizing methyl isobutyl ketone followed by ion exchange column chromatography results in the highest radionuclide purity.
TL;DR: A procedure for the radiochemical determination of (60)Co in low-activity samples of sediment and biological material is described and cobalt recovery is high and decontamination from tervalent lanthanides and naturally-occurring radionuclides is complete.
TL;DR: Results, which showed that samples from the contaminated workroom contained 0.1-0.2% nitrate, while blanks contained less than 0.02%, strongly support the hypothesis proposed for the course of the accident.
Abstract: A case of accidental occupational intoxication by fumes of nitrogen oxides and the application of an indirect method for the analysis of nitrate, nitrite, and nitro groups to establish the origin of the intoxication are presented The method is based on the formation of a copper neocuproine complex, and extraction of the complex with methyl isobutyl ketone The amount of copper in the organic phase is directly proportional to the nitrate content This copper complex is determined by atomic absorption spectrophotometry The results, which showed that samples from the contaminated workroom contained 01-02% nitrate, while blanks contained less than 002%, strongly support the hypothesis proposed for the course of the accident
Patent•
02 Nov 1982
TL;DR: In this paper, a developer is used to obtain a developer swelling hardly a resist during development in the formation of a fine resist figure by mixing methyl ethyl ketone with methyl isobutyl or methyl n-butyl ketones in 3:1-10:1 volume ratio.
Abstract: PURPOSE:To obtain a developer swelling hardly a resist during development in the formation of a fine resist figure by mixing methyl ethyl ketone with methyl isobutyl ketone or methyl n-butyl ketone. CONSTITUTION:Methyl ethyl ketone is mixed with methyl isobutyl ketone or methyl n-butyl ketone in 3:1-10:1 volume ratio to obtain a developer. By developing polyglycidyl methacrylate exposed to electron beams with the developer, a figure with high reproducibility in narrow line width and sharp peripheral corners is obtd.
Patent•
04 Oct 1982
TL;DR: In this paper, a method of application of the composition to produce masks of the type particularly useful in the manufacture of varnished electronic terminals and components is specified. The composition consists of mixing acetone, nitrocellulose, methyl isobutyl ketone (MIBK), arylsulfonamide formaldehyde resin, and tri (b-chloroethyl) phosphate, a fire retardant, under carefully controlled conditions.
Abstract: A composition and method of application of the composition to produce masks of the type particularly useful in the manufacture of varnished electronic terminals and components is specified. The composition consists of mixing acetone, nitrocellulose, methyl isobutyl ketone (MIBK), arylsulfonamide formaldehyde resin, and tri (b-chloroethyl) phosphate, a fire retardant, under carefully controlled conditions. This masking product is applied, prior to the varnish, on an electronic part and is subjected to heating in the varnish curing oven to about 200° F. whereupon the masking product will carbonize. The resulting carbonized coating is easily removed by brushing to produce a varnish mask where the masking product was applied.