Acetic Acid → Chromium(III) acetate

Beteiligte Stoffe

Reaktionsschritte

Chromium Micelle: Weighed 10 grams of chromic oxide (Cr2O3) and added to a 4 liter beaker. The contents of the beaker were slurried with 200 ml of distilled water. 12.5 ml of glacial acetic acid were added to produce a chromic (III) acetate in solution. 100 grams of chrysotile asbestos (Union Carbide, high purity, grade 7) were added. The contents of the beaker were diluted to 3.5 liters with distilled water, followed by heating to 100° C., and stirring to provide adequate mixing with the chromic acetate. 200 ml of 1 N sodium hydroxide were added to the suspension to precipitate a chromium (III) oxide micelle onto the asbestos surface. The product was removed from the heat source and allowed to cool. The product was collected by vacuum filtration using a Whatman #1 filter. The resulting dark green product was allowed to air dry for 16 hours. The filter cake was dried at 330° F. for 90 minutes. The dry cake was fiberized by use of a blender at high speed for 1 minute. A sample of the product was completely dissolved by treatment with 20% by weight sodium peroxide at 850° C. Elemental analysis is shown in Table I. HF insoluble matter was increased to 53% compared to 8.6% for an untreated chrysotile as shown in Table II.

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