Reaction of iron with monoeth anolamine

✍ Scribed by Dixon, B. E. ;Williams, R. A.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1950
• Weight: 370 KB
• Volume: 69
• Category: Article
• ISSN: 0368-4075
• DOI: 10.1002/jctb.5000690302

✦ Synopsis

Scrupulous care must be observed in using the test near its limit of sensitivity as a colourless reagent is essential. Two common errors in preparing a colourless reagent were (i) failure to remove caustic soda completely from every part of the apparatus before each test, and (ii) failure to ensure that the gas flow did not cease at any time. It was found that the slightest inward diffusion of air caused a discoloration. A guard tube may be inserted to minimize this possibility.

The efficacy of the tests was fully demonstrated by the fact that copper ethanolaminc used for the separation and concentration of ethylene on a pilot plant unit showed no sign of precipitation of copper acetylide or loss of activity by oxidation during many months' working and control by the tests outlined.

For the determination of low concentrations of oxygen in gas mixtures, a method depending on the paramagnetism of oxygen is being developed and may prove an alternative to the pyrogallol method.