Determination of Primary Fatty Amines in Amine Mixtures

Abstract

rI^iTRATiox in nonaqueous media with perchloric acid has Jbeen found to be more satisfactory than the Van Slyke procedure for the determination of the amino acids (J). This procedure has been adapted to the determination of the amine

Potentiometric Electrode Systems In Nonaqueous Titrimetry

“…The latter two may then be titrated with hydrochloric acid in 2-propanol (221). By using a solvent which is essentially chloroform, 2-propanol, and a little water, Jackson extended this method to the examination of mixtures of long-chain amines (91). Hydrogen bonding in phenolic resin intermediates has been studied by titration in a benzene-2-propanol medium (193).…”

Determination of Small Amounts of Secondary Amine in High Molecular Weight Fatty Primary Amines

“…By employing the same calibration curve, the following percent- Octodecylamine, salicylaidehyde, and neutralized bromocresol green 2. Octodecylamine, dioctadecylamine, salicylaidehyde, and neutralized bromocresol green 6 Distilled hydrogenated tallow primary amine. 6 Distilled hydrogenated tallow primary amine containing dioctadecylamine.…”

“…Octodecylamine, dioctadecylamine, salicylaidehyde, and neutralized bromocresol green 6 Distilled hydrogenated tallow primary amine. 6 Distilled hydrogenated tallow primary amine containing dioctadecylamine. 1.5 0.68 2.0 0.60 2.5 0.58 6 Absorbance readings were made on solutions containing indicated amount of dioctadecylamine and 80 mg. of hydrogenated tallow primary amine.…”

“…Distilled fatty primary amines, of high molecular weight produced commercially by the reduction of nitriles, usually contain less than 1% of the corresponding difatty secondary amine. Available titration procedures for secondary amine (1,3,6,9) were not sensitive enough for determining such small quantities. Sensitive colorimetric methods were available for the analysis of secondary amines (8, 5, 7); however, they are not directly applicable to the determination of high molecular weight secondary amines in the presence of a preponderance of primary amine.…”

Pure Amines for the Flotation of Silica from Rougher Phosphate Concentrate

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Vol. 47,No. 3 to 0.7 weight %, while the nitrogen contents increased to a maximum of about 4.0 weight % at a retort temperature of 1300°to 1400°F.

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