Showing papers on "Potassium dichromate published in 1974"
TL;DR: Administration of 40 mg/kg potassium dichromate to adult male rats produced a significant enhancement of N-methylnicotinamide (NMN) uptake by renal cortical slices when measured 24 h after a single subcutaneous injection.
Abstract: Administration of 40 mg/kg potassium dichromate to adult male rats produced a significant enhancement of N-methylnicotinamide (NMN) uptake by renal cortical slices when measured 24 h after a single...
12 citations
TL;DR: In this paper, it was shown that for the B-Si-K2Cr2O7 system, the ignition process is dependent on transport in the liquid phase and the combustion zone then propagates as a molten front.
10 citations
Patent•
02 Oct 1974TL;DR: In this paper, the hexavalent chromium ion is dissolved in appropriate low-polar, organic solvents such as paint coatings and removers and lubricants, and two immiscible solutions are then shaken for a few seconds.
Abstract: A process for solubilizing the chromate ion in non-polar organic media. The hexavalent chromium ion, being the best known corrosion inhibitor for aluminum and steel, is dissolved in appropriate low polarity, organic solvents such as paint coatings and removers and lubricants. A 0.1 molar solution of potassium dichromate in water is prepared and the pH of the solution adjusted to approximately 1.0 with hydrochloric acid. An equal volume of a methylene chloride solution is prepared in which the following compound is 0.01 molar: dicyclohexyl-18-crown-6 macrocyclic polyether. The two immiscible solutions are then shaken for a few seconds. The organic solution now contains the hexavalent chromium ion in a concentration of 0.01 molar. After the two solutions have separated, the organic phase is removed and 100 milliliters are added, for example, to a quart of wet paint immediately prior to its application. The resultant coating contains a hexavalent chromium concentration of more than 0.001 molar, more than sufficient for corrosion inhibition.
6 citations
TL;DR: In this paper, the use of 2-nitrodiphenylamine as a reversible indicator has been investigated in the titration of iron(II) with cerium(IV) sulphate, potassium dichromate, and sodium vanadate in sulphuric acid media.
3 citations
TL;DR: The following gas mask canister carbon fillings were evaluated in laboratory and man tests against phosphine which is finding favour as a fumigant for food stuffs: activated carbons impregnated with (1) copper sulphate, (2) potassium dichromate and silver chromate,(3) copper carbonate, potassium chromate and copper permanganate and (4) potassium permanganates.
Abstract: The following gas mask canister carbon fillings were evaluated in laboratory and man tests against phosphine which is finding favour as a fumigant for food stuffs: activated carbons impregnated with (1) copper sulphate, (2) potassium dichromate and silver chromate, (3) copper carbonate, potassium chromate and silver chromate and (4) potassium permanganate.
Impregnation with copper sulphate (12% w/w) proved to be effective and economical. A cumulative service time of 5.2 mg h/litre was obtained in the laboratory tests at 1.7 mg/litre phosphine in air and 3.1 mg h/litre at 0.2-1.5 mg/litre phosphine in the man tests.
3 citations
TL;DR: The reactions of four transition metal ions and oxyanions with fused zinc chloride have been elucidated in this paper, showing that at higher temperatures they react to give zinc chromite, with slight oxidation of the melt.
2 citations