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Showing 1 to 20 of 147 for “"Hydrochloric acid"”.
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The corrosion of aluminum by hydrochloric acid vapors
… but corrodes rapidly in most inorganic acids. The purpose of this investigation was to attempt to determine the rates and mechanism of the surface reactions for the corrosion of aluminum in hydrochloric acid vapors as a function of the vapor concentration, vapor composition, and …
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A method of direct manufacture of hydrochloric acid solution
Thesis: M.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1936
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Corrosion and electrochemical behavior of Indium and Indium-Bismuth alloys in hydrochloric acid
<p>"The corrosion of In-Bi alloys was studied using X-ray, scanning electron microscopy, atomic absorption spectroscopy, and cyclic voltammetry techniques.</p> <p>Calculated activation energy values indicated that the corrosion of In-Bi alloys was activation controlled. The effect of amine mixtures …
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A statistical analysis of data on the corrosion of aluminum in hydrochloric acid vapors
In this thesis, corrosion data were subjected to statistical analysis for the purpose of obtaining meaningful estimates of the specific rate of reaction and the energy of activation and obtaining a response equation for prediction of weight gain. A two-stage analysis was used in the estimation of …
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Selective preconcentration of platinum and rhodium from hydrochloric acid media containing tin (II) chloride using polyurethane foam
… polyurethane foams are dissolved in hot nitric acid, followed by flame AAS. Near-quantitative recovery of these metals has been achieved by means of foam stripping using a suitable eluent. The rate of formation of the chloro-(trichlorostannato)platinum( II) complex anions is rapid when PtCl₄²⁻ …
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Salt effects and correlations with the Hammett acidity function in the decomposition of trioxane by aqueous hydrochloric acid
The acidity function, H<sub>o</sub>, of Hammett and Deyrup for a neutral basic indicator has been shown to correlate with the specific reaction rate constant, k, for a number of acid-catalyzed reactions with an A-1 mechanism. Correlations of this type have been reported for many of the strong …
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The use of polyurethane foams for the extraction of platinum (II) from hydrochloric acid solutions in the presence of tin (II) chloride
… of [Pt(SnCl₃)nCl₄-n]²⁻ and [Pt(SnCl₃)₅]³⁻ from hydrochloric acid solutions by polyurethane foams was examined in detail. Our studies show that the capacity of the foam to extract platinum depends on the following solution conditions of, temperature, initial platinum concentration, hydrochloric …
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A New Method for the Analysis of Carbohydrates by Means of Vanillin in Acid Medium
… that the analysis of sugars with phenols and hydrochloric acid frequently offers a most rapid as well as most reliable method for detecting sugar groups. Ihl (2) discovered that a solution of aldo- pentose sugars gave, upon heating with an equal volume of concentrated hydrochloric acid and a …
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Potentiostatic polarization and the corrosion of nickel-chromium- iron-molybdenum alloy 825
… to 15.0 normal sulfuric and 0.5 to 3.0 normal hydrochloric acids at 25 to 60°C in both nitrogen-saturated and air-saturated acids, using potentiostatic polarization techniques. Anodic polarization curves were obtained by changing the potential of an Incoloy 825 test electrode and measuring the …
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Acid resistance of sewer pipe concrete
A hydrochloric acid solution laboratory test was developed to assess the resistance of concrete used in the manufacture of pipes to sulphuric acid environments encountered in sewers. A hydrochloric acid solution (pH of 1,00) simulates the attack on concrete sewer pipes at the average daily sewage …
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The production and separation of levulose from sorghum syrup with the application of ion exchange methods
… present in the prepared juice was inverted by acidifying the juice with sufficient 38.7-per-cent hydrochloric acid to obtain a pH of 1.0 to 1.2 and heating to 90°C for one hour; an inversion of 95 to 99 percent of theoretical resulted. A molar ratio of calcium hydroxide to levulose 3:1, based …
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Analytical Separation of Zirconium-95 and Niobium-95 from Uranium Irradiated by Thermal Neutrons
… into the ability of silica gel, in a medium of hydrochloric acid, to separate zirconium and niobium From an irradiated uranium sample and from 4 non-radioactive sample. Different procedures were then considered for the determination of zirconium and niobium; gamma ray detection, X-ray …
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Alum treatment of caustic wash from chlorine bleached kraft pulp
… 39 Pounds per hour to 60 pounds per hour. The hydrochloric acid flow rate remained constant at approximately five pounds per hour. The raw waste was acidified with 38 percent hydrochloric acid to a pH of 6.0, and treated with alum sulfate slurry to coagulate the solids in the waste. The …
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Multifunctional chromatography supports
… groups were reacted with sodium hydroxide or hydrochloric acid. Finally a charged amine ligand was coupled to the support by reacting trimethylamine hydrochloride with the remaining epoxide groups. Supports created by route 1 eliminated 91% of plasmid DNA binding whilst maintaining a high …
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