Showing papers on "Methyl isobutyl ketone published in 1981"

Determination of heavy metals in a menhaden oil after refining and hydrogenation using several analytical methods

Abstract: A series of menhaden oils collected at various stages of processing have been analyzed for zinc, cadmium, lead, copper and arsenic by wet digestion and electrothermal atomization-atomic absorption spectrophotometry (aas). The results are compared, for some metals, with 2 other methods of oil treatment: extraction with nitric acid and dilution with methyl isobutyl ketone. Both the extraction and dilution procedures appeared to measure only the loosely bound, inorganic portion of the metals: determination of the total metal content including organometallics required wet digestion. The crude oil contained the largest metal burden but successive refining steps reduced the metal content to a level which met the FAO/WHO Codex standards. Hydrogenation did not significantly alter the metal concentration in the oils.

Mixtures of methyl isobutyl ketone with three butanols at various temperatures

Abstract: The viscosities, densities, and refractive indices at 20, 25, 30, and 35 °C were determined for the systems: methyl isobutyl ketone–n-butanol (MIK–B1), methyl isobutyl ketone–sec-butanol (MIK–B2), ...

Adsorption of Automotive Paint Solvents On Activated Carbon: I. Equilibrium Adsorption of Single Vapors

Abstract: A bench scale system to measure adsorption of organic vapors on activated carbon is described in this report. The system was used to measure the equilibrium adsorption isotherms of n-heptane, n-butanol, and methyl isobutyl ketone at a concentration range of 50 to 900 ppm on a Columbia JXC activated carbon and the adsorption capacity of eleven additional solvents at a concentration of 365 ppm. It is found that the Polyani–Dubinin correlation describes the results well. Using n-heptane as a reference solvent, the mean error in the prediction of equilibrium adsorption capacity is 1.9% and the maximum error 7.2%.

Recovery of BPA and phenol from aqueous effluent streams

Abstract: A method for simultaneously extracting and recovering 2,2-bis(4-hydroxyphenyl) propane and phenol from aqueous effluent streams by liquid-liquid extraction using methyl isobutyl ketone.

Purification of aqueous effluent streams containing BPA and phenol

Abstract: A method for a purifying aqueous effluent streams containing BPA and phenol using liquid-liquid extraction with methyl isobutyl ketone.

Ternary Equilibrium for the System Water/Methyl Isobutyl Ketone/2-Ethyl-2-(hydroxymethyl)-1,3-propanediol

Abstract: Journal of Chemical and Engineering Data is published by the American Chemical Society 1155 Sixteenth Street NW, Washington, DC 20036 Ternary Equilibrium for the System Water/Methyl Isobutyl Ketone/2-Ethyl-2-(hydroxymethyl)-1,3-propanediol Francisco Lozano J Chem Eng Data, 1981, 26 (2), 131-133• DOI: 101021/je00024a600 • Publication Date (Web): 01 November 2004 Downloaded from http://pubsacsorg on May 6, 2009

Improvement in the atomic absorption determination of lead in blood

Abstract: A simple, precise and accurate analysis for lead in blood and tissue was developed using spectrophotometry after extraction with HCl, H3PO4, KI and methyl isobutyl ketone. The results were similar to those obtained by anodic stripping voltammetry. The method is simple, requires only four reagents, does not need pH adjustment for lead extraction, saves time and is suitable for analyzing a large number of specimens.

Preparation of high purity phenolic novolak epoxy resin

Abstract: PURPOSE: To obtain the titled epoxy resin having high epoxy value and low hydrolyzable chlorine content, in high yield, by reacting a specific phenolic novolak resin with excess epichlorohydrin in the presence of an alkali metal hydroxide. CONSTITUTION: A phenolic novolak resin of formula (R is H or methyl; n is 0W 7) is dissolved in 3W7mol (based on 1 equivalent mole of phenolic OH group) of epichlorohydrin with sirring, and made to react with 0.85W0.95mol of an aqueous solution of an alkali metal hydroxide (e.g. NaOH) added continuously dropwise to the solution at 60W70°C and 100W200mmHg. After recovering the epichlorohydrin, a solvent (e.g. methyl isobutyl ketone) is added to the reaction product to obtain a resin solution. 0.03W0.13mol of an aqueous solution of an alkali metal hydroxide is added to the resin solution, and reacted at 60W90°C to obtain the objective substance having an epoxy equivalent of 190W210 and a hydrolyzable chlorine content of 0.01W0.04wt%. COPYRIGHT: (C)1982,JPO&Japio

Gold recovering method

Abstract: PURPOSE:To perform a high-efficiency high-grade gold recovery by a method wherein a gold-containing material is treated with aqua regia, extracted by a mixed organic solvent, and then reduced. CONSTITUTION:To a gold-containing base material, aqua regia or aqueous HCl solution of 6-6.5N is added, the mixed solution is heated to about 100-130 deg.C, and is cooled to room temperature to form chloroauric acid. The chroroauric acid solution is extracted by one of organic solvent such as ether or methyl isobutyl ketone or its mixed organic solvent with isoamyl acetate. Then an alkaline solution, e.g., an aqueous NaOH solution of 30-50% concentration is added to strip gold as gold hydroxide. Gold hydroxide stripped in the water layer is added with a 3- 5N HCl to reform it into chloroauric acid, to which a reducing agent such as Na2SO3 is added. The precipitated gold is separated by suction filtration, dried and melted to obtain gold lump. Thus, gold can be recovered from gold-containing base material, in high-efficiency and high-grade manner, without being affected by base components other than gold.

4-Hydroxy-phenyl:acetic acid by redn. of 4-hydroxy:mandelic acid - in the presence of lower aliphatic carboxylic acid

Abstract: 4-Hydroxyphenylacetic acid (I) is prepd. by reducing 4-hydroxymandelic acid (II) in a reaction medium of a lower aliphatic carboxylic acid or a water-contg. lower aliphatic carboxylic acid. Pref. (II) is the crystalline and obtd. by reacting phenol and glyoxylic acid in an aq. medium at 40-70 deg.C, extracting the reaction mixt. with a substantially water-immiscible organic solvent and removing the solvent from the extract. In the prepn. of (II), pref. the reaction temp. is 40-65 deg.C and the reaction is effected in the presence of an alkali, esp. NaOH or KOH. The reaction medium may be water or a mixt. of water and a miscible organic solvent. The ratio of glyoxylic acid, phenol and alkali is generally 1:0.8 to 10:1 to 5, pref. 1:1.2 to 3.5:1.2 to 4, with the amt. of aq. medium being up to 80 times that of the glyoxylic acid. Pref. reaction is effected in an atmos. of an inert gas. After the reaction, the mixt. is acidified, unreacted phenol is removed by extn. with a solvent, e.g. benzene, toluene or chloroform, and the aq. layer is extd. with a solvent e.g. a lower alkyl acetate, an ether or an aliphatic ketone, pref. ethyl acetate or methyl isobutyl ketone. (I) is an intermediate in the prepn. of pharmaceuticals and agricultural chemicals. Its prepn. by the redn. of (II) in the presence of HCl gives yields of at most 85% and there are problems of corrosion and prod. purificn., whereas in the present process (I) of high quality is produced in yields of 90-95% without these problems. Also the method for the prepn. of (II) gives high yields of this cpd. in short reaction times.

Paint composition forming double-layer coating film

Abstract: PURPOSE:To provide the titled compsn. which produces a coating film in which an olefin resin and an epoxy resin are separated from each other as an upper layer and a lower layer by single coating, consisting of a solid powder contg. the olefin resin, the epoxy resin and a specified volatile org. liquid medium. CONSTITUTION:100pts.wt. Mixture of 15-85wt% solid powder (A) [having an average particle diameter of 150mu or smaller and consisting of olefin resin (a) (having an MI of 0.3-120g/10min and a number-average MW of not less than 8,000 and composed of at least 76wt% olefin unit and not more than 24wt% another copolymerizable vinyl monomer unit such as styrene), and not more than 150wt% colorant (b) such as TiO2 or carbon black] and 85-15wt% epoxy resin (B) having a number-average MW of 330-4,000 and an epoxy equivalent of 100- 3,300, is dispersed and dissolved in 50-300pts.wt. volatile org. liquid medium (C) (e.g. a mixture of methyl isobutyl ketone, isooctane and toluene) which has a b.p. of 33-210 deg.C can completely dissolve the component (B) and exhibits wettability to the component (A), but does not exhibit swelling effect and dissolving effect on the component (A).

Removing method for iron from raw material aqueous solution in solvent extraction process

Abstract: PURPOSE:To remove Fe in an aqueous Zr soln. with no loss of Zr and high efficiency by oxidizing the Fe and extracting the resulting Fe with methyl isobutyl ketone. CONSTITUTION:An oxidizing agent such as H2O2 or NaOCl is added to an aqueous Zr soln. contg. Fe as impurity to convert the ferrous ions into ferric ions, and this aqueous soln. is brought into countercurrent contact with methyl isobutyl ketone to extract the Fe into the org. phase. This Fe-contg. metyl isobutyl ketone is then brought into contact with water to extract the Fe into the aqueous phase, and the remaining methyl isobutyl ketone is recycled.

Manufacture for magnetic recording medium

Abstract: PURPOSE:To obtain the magnetic recording medium having the magnetic layer excellent in the oxidation stability of magnetic powder and excellent in the dispersing property, by the surface treatment of metallic and magnetic powder with a specific resin CONSTITUTION:Polyvinylbutyral resin is dissolved in a suitable solvent such as toluene, methyl isobutyl ketone, and tetrahydrofuran, and after the metallic and magnetic powder is uniformly dispersed in this solution, drying is made in inert gas or under vauum to obtain the metallic and magnetic powder with surface treatment Next, this surface treated metallic and magnetic powder is mixed and dissolved in the organic solvent dissolving the coupling agent resin to constitute the magnetic piant and then magnetic recording medium through the coating on the base As polyvinyl butyral resin, about 250-900 average polymerization degree and rich in fluidity is preferable

High sensitive and positive type resist

Abstract: PURPOSE:To obtain a titled resist having high sensitivity, high resolution and good heat resisting shape retention, by incorporating a specific methacylic acid tertiary alkylester fluoride polymer. CONSTITUTION:By polymerizing tertiary alkylester fluoride obtained by reacting alcohol fluoride and methacrylic acid or its reacting derivative, 1million-15million weight average mol.wt. methacylic acid tertiary alkylester fluoride polymer (formulaI) is obtained. A resist solution in which the polymer is dissolved in a solvent such as aliphatic ketone and alcohol, etc. is applied on a supporting material to form a resist layer, and after the layer is irradiated with high energy beam to form a desired pattern, it is developed by using a solvent such as methyl isobutyl ketone, etc. By this way, a semiconductor element and a magnetic bubble element, etc. having <=1mum fine pattern are obtained.

The analysis of cadmium in marine samples.

Abstract: This paper describes a procedure for extracting cadmium from seawater and from whole-organism digests of the gastropod mollusc Mytilus planulatus (common mussel) prior to analysis by atomic absorption spectrophotometry (AAS). The individual whole mussels were dehydrated to constant weight at 50°C, digested under simple reflux in nitric acid, and the solution buffered to pH5 with sodium hydroxide and sodium citrate. The cadmium was extracted into dithizone in methyl isobutyl ketone and the organic layer stored in polyethylene containers for analysis by AAS. Seawater samples were treated in the same way, without dehydration. At each step in the sample preparation, the method was tested to ensure that no significant loss or contamination had occurred.

22carboxyy3*44dimethyll77isopropylideneebicyclo 4*2*0 octt33 enn88one

Abstract: NEW MATERIAL:2-Carboxy-3, 4-dimethyl-7-isopropylidene-bicyclo[4, 2, 0]-oct-3- en-8-one of formula I. USE:Useful as a material for preparation of a monoglycidyl ester which is a diluent of epoxy resin useful as a casting material, an adhesive, a resin additive, and a reinforcing material of fibers and paper. Useful as a chelating agent, as a starting material of complex compounds which are useful as anti-corrosive agents, organic pigments, and resin additives. Also useful as a starting material of pesticides and pharmaceuticals, and as a raw material of functional polymers. PROCESS:The compound of formula II is heated at 100-200 deg.C for 0.5-several hrs in the presence or absence of a solvent, e.g. toluene, in the presence of an acid catalyst, e.g. boron trifluoride.etherate, aluminum chloride etc. The isomerized precipitate is purified from methyl isobutyl ketone solution, e.g. by recrystallization, to give the compound of formula I.