Inhibition of charge-pair recombination by sulphuric acid in irradiated aqueous solution

1976 ◽  
pp. 594b ◽  
Author(s):  
Ralph W. Matthews
Keyword(s):  
Aqueous Solution ◽  
Sulphuric Acid

The synthesis of Cyclododecane-r-1,c-5,c-9-triamine and r-1,c-5,c-9-Tris(2,3-dimethoxybenzamido)cyclododecane

1975 ◽  
Vol 28 (3) ◽  
pp. 673 ◽  
Author(s):  
DJ Collins ◽  
C Lewis ◽  
JM Swan
Keyword(s):  
Aqueous Solution ◽  
Acid Hydrolysis ◽  
Sulphuric Acid ◽  
Sodium Carbonate ◽  
Sodium Azide ◽  
Room Temperature ◽  
Dimethyl Formamide ◽  
Lithium Aluminium Hydride ◽  
Lithium Aluminium ◽  
Hydrolysis Of

Treatment of cyclododecane-r-1,c-5,c-9-triyl tris(p-toluenesulphonate) with sodium azide in dimethyl-formamide at 100� for 6 h gave the corresponding cis,cis-triazide which upon hydrogenation or reduction with lithium aluminium hydride gave cyclododecane-r-1,c-5,c-9-triamine, isolated as the tris-salicylidene derivative. Acid hydrolysis of this, removal of the salicylaldehyde, and treatment of the aqueous solution with sodium carbonate and 2,3-dimethoxybenzoyl chloride gave r-1,c-5,c- 9-tris(2,3-dimethoxybenzamido)cyclododecane. ��� Treatment of (E,E,E)-cyclododeca-1,5,9-triene with an excess of acetonitrile and sulphuric acid at room temperature for three days gave 18% of (E,E)-1-acetamidocyclododeca-4,8-diene; no di- or tri-amides were isolated.

Photoreduction of uranyl ion in aqueous solution. I. With ethanol in sulphuric acid solutions

1996 ◽  
Vol 96 (1-3) ◽  
pp. 45-50 ◽  
Author(s):  
Ryuji Nagaishi ◽  
Yosuke Katsumura ◽  
Kenkichi Ishigure ◽  
Hisao Aoyagi ◽  
Zenko Yoshida ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Sulphuric Acid ◽  
Uranyl Ion ◽  
Acid Solutions

scholarly journals Further observations on voltaic combinations; in a letter addressed to Michael Faraday, Esq., D. C. L. F. R. S., Fullerian Professor of Chemistry in the Royal Institution, &c. &c. By John Frederick Daniell, Esq., F. R. S., Professor of Chemistry in King's College, London

1837 ◽  
Vol 3 ◽  
pp. 469-471
Keyword(s):  
Aqueous Solution ◽  
Electric Current ◽  
Sulphuric Acid ◽  
Hot Water ◽  
Common Salt ◽  
Influence Of Temperature ◽  
King's College ◽  
Royal Institution ◽  
The Subject ◽  
Michael Faraday

In the course of an inquiry on the effects of changes of temperature upon voltaic action, the author was led to observe some curious disturbances and divisions of the electric current produced by the battery, arising from secondary combinations; the results of which observations form the subject of the present paper. He found that the resistance to the passage of the current was diminished by dissolving the sulphate of copper which was in contact with the copper in the standard sulphuric acid, instead of water. The increased effect of the current, as measured by the voltameter, was farther augmented by the heat evolved during the mixture; and wishing to study the influence of temperature in modifying these effects, the author placed the cells of the battery in a tub, filled with hot water. On charging the cells with a solution of muriate of ammonia in the interior, and aqueous solution of sulphate of copper in the exterior compartment, he observed that a portion of the current is discharged by the water in which the apparatus was immersed; its passage being indicated by the disengagement of gas betwixt the adjacent cells, in which case, one of the zinc rods is thrown out of action, and the copper of that cell acts merely as an electrode to the antecedent zinc. A saturated solution of common salt was next placed in contact with the zinc, while the exterior compartments of the cells were filled with a saturated aqueous solution of sulphate of copper; but the effects were much diminished. It thus appeared that the substitution of solutions of the muriates for dilute sulphuric acid was in every way disadvantageous; and it was moreover found that, when the circuit was broken, the copper became seriously injured by their action, and by the formation of a submuriate of that metal.

scholarly journals The Removal of Dye from Aqueous Solution by Adsorption on Low Cost Adsorbents

2010 ◽  
Vol 7 (3) ◽  
pp. 1003-1007 ◽  
Author(s):  
J. J. Chamargore ◽  
J. V. Bharad ◽  
B. R. Madje ◽  
M. B. Ubale
Keyword(s):  
Aqueous Solution ◽  
Sulphuric Acid ◽  
Room Temperature ◽  
Dye Removal ◽  
Low Cost ◽  
Industrial Effluents ◽  
Adsorptive Capacity ◽  
Dye Uptake ◽  
Marble Powder ◽  
System Variables

Removal of color from aqueous solution by using low cost easily available adsorbent was conducted by batch experiment. The potential of the low cost adsorbent (Marble powder-treated and untreated) to remove methylene red from aqueous solution were assessed at room temperature. Laboratory investigation of the potential of marble powder and sulphuric acid treated marble powder to remove dye color from aqueous solution has been studied. Parameters studied included pH, adsorbent dose, initial dye concentration and contact time. The influence of these system variables were investigated to observe the effect on the rate of dye uptake. Sulphuric acid treated marble powder has shown better adsorptive capacity than untreated marble powder and thus it has become an interesting option for dye removal from industrial effluents.

Corrosion of hot pressed Si3N4–TiN composite in sulphuric acid aqueous solution

2003 ◽  
Vol 45 (11) ◽  
pp. 2525-2539 ◽  
Author(s):  
V. Medri ◽  
M. Bracisiewicz ◽  
A. Ruffini ◽  
A. Bellosi
Keyword(s):  
Aqueous Solution ◽  
Sulphuric Acid ◽  
Acid Aqueous Solution

THE DISTILLATION, EXTRACTION, AND CHROMATOGRAPHIC SEPARATION OF THE C2–C8 FATTY ACIDS

1951 ◽  
Vol 29 (8) ◽  
pp. 633-641 ◽  
Author(s):  
D. Fairbairn ◽  
R. P. Harpur
Keyword(s):  
Aqueous Solution ◽  
Fatty Acids ◽  
Sulphuric Acid ◽  
Silica Gel ◽  
Filter Paper ◽  
Chromatographic Separation ◽  
Constant Volume

Thirty-five milliliters of an aqueous solution containing 5 to 70 micromoles of volatile C2 to C8 acids was distilled to constant volume without refluxing. The distillate was titrated, made alkaline, and evaporated to dryness at 110°C. The free acids were regenerated by the addition of 0.03 ml. of 10 N sulphuric acid, absorbed on filter paper, and extracted quantitatively with 3 ml. of chloroform–butanol (99: 1). Acids present in the extract were separated by chromatography on a composite silica-gel column employing two internal indicators, and after elution were determined by titration, the details for which are given. The preparation of a reproducible silica is described.

On the mutual action of sulphuric acid and naphthaline, and on a new acid produced

1833 ◽  
Vol 2 ◽  
pp. 265-265
Keyword(s):  
Aqueous Solution ◽  
Sulphuric Acid ◽  
High Temperatures ◽  
Pure Acid ◽  
Sour Taste ◽  
Distinct Class ◽  
Mutual Action

In this communication Mr. Faraday shows that when sulphuric acid and naphthaline act upon each other, a peculiar compound pos­sessed of distinct acid characters is the result. This acid is most readily obtained by heating two parts of naphthaline with one of sulphuric acid. The mixture concretes on cooling, and separates into two parts, the uppermost of which is little else than naphthaline, but the lower, heavier part contains the peculiar acid, which, being soluble in water, is easily separated by that fluid, not, however, pure, but still containing mixed sulphuric acid. The author, however, ob­tained the pure acid by decomposing its compound with baryta, which is soluble, by sulphuric acid. It then had a bitter sour taste, and formed a distinct class of salts with the different bases, all of which are soluble in water and in alcohol, and combustible. By careful evaporation of the aqueous solution of this acid, a white crystalline deliquescent solution was obtained, evolving water when heated, and at high temperatures affording sulphurous acid, char­coal, and naphthaline. To determine the ultimate component parts of this acid, its compound with baryta was subjected to rigid analysis.

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