REDUCTION OF CONCENTRATED SULPHURIC ACID BY COPPER.

Microcrystalline-Cellulose Hydrolysis with Concentrated Sulphuric Acid

The effects of temperature (25-40°C), H,SO, concentration (31-70% (w/v)) and the acid/substrate relationship (1-5 cm3 of H,SO, per g-' of cellulose) on the solubilization rate of microcrystalline cellulose and on the glucose production rate have been analysed. The solubilization process was by determining reducing groups present in solution. For acid/substrate relationships of more than 1 cm3 g...

The Influence of Mechanical Activation of Chalcopyrite on the Selective Leaching of Copper by Sulphuric Acid

Base metal sulphides are an important source of various metals. They are typically intergrowth and due to the complex nature of their ores, the hydrometallurgical technique is the very convenient way of extracting the desired component. If it is possible to extract the metal from an ore selectively, the subsequent processing steps become less complicated. Mechanical activation seems to be a fav...

Sulphuric Acid in Cholera

can only be properly prescribed by the medical attendant. There is no single antidote. As a valuable adjunct against the epidemic the following orangeade, suggested by Dr. Waller Lewis, has been extensively used with excellent effects :? " Sulphuric Orangeade useful in Cholera times.?Concentrated compound infusion of orange peel 3 oz., simple syrup 12 oz., boiled filtered water 4 gallons, mix w...

Estimation of monosaccharides by the orcinol-sulphuric acid reaction.

Experimental Study of the Extraction of Copper(II) from Sulphuric Acid by Means of Sodium Diethyldithiocarbamate (SDDT)

T he present work presents the extraction of copper(II) from sulphuric acid solutions with Sodium diethyldithiocarbamate (SDDT), and six different organic diluents: Dichloromethane, Chloroform, Carbon tetrachloride, Toluene, xylene and Cyclohexane, were tested. The pair SDDT/Chloroform showed to be the most selective in removing the copper cations, and hence was considered throughout the experi...