摘要:

AbstractA critical review is given of the literature dealing with the treatment of electrolyte decomposition in effluent streams.

ISSN:0375-9210    

DOI:10.1002/jctb.5020210201

出版商:John Wiley&Sons, Ltd    

年代:1971

数据来源: WILEY

摘要:

AbstractThe oxidation of carbon on a silica‐alumina catalyst has been investigated in the temperature range 420–544°c under differential reactor conditions. The reaction was first order in oxygen but the order with respect to the deposited carbon could be interpreted as either a first‐order or surface reaction process. However, a statistical analysis and mechanistic considerations suggest that the surface reaction mechanism is more pr

ISSN:0375-9210    

DOI:10.1002/jctb.5020210202

出版商:John Wiley&Sons, Ltd    

年代:1971

数据来源: WILEY

摘要:

AbstractThe degree of partial detergence accomplished by passing representative subsamples of several lots of greasy wools at controlled alkaline pH values (generally constant in each experiment) through the same bath of water at 50°c has been followed by estimations of loss of grease as well as loss of all soiling materials. The degree of detergence usually tends to rise to a maximum and then often falls off as is usual when detergent concentration is increased in other systems. As the pH of the detergence is raised, the maximum attained rises and the fall‐off generally occurs earlier, at least up to pH 10.0. The course of detergence varies with the kind of alkali and its purity. Inorganic salts and amyl alcohol raise the maximum and increase the rate of fall‐off of the self‐detergence. Other methods of raising the degree of detergence are explored. The maintenance of maximum detergence for all wools is a complex p

ISSN:0375-9210    

DOI:10.1002/jctb.5020210203

出版商:John Wiley&Sons, Ltd    

年代:1971

数据来源: WILEY

摘要:

AbstractThe nature and source of the detergent substances in raw wool were studied. They were found to consist of fatty acids and acidic low polyesters and were not obtained from suint, the product of the sudoriferous glands.

ISSN:0375-9210    

DOI:10.1002/jctb.5020210204

出版商:John Wiley&Sons, Ltd    

年代:1971

数据来源: WILEY

摘要:

AbstractAn investigation has been made into why calcium sulphate β‐hemihydrate, derived from the by‐product gypsum of wet‐process phosphoric acid manufacture, can, when derived from certain types of phosphate rock, be insensitive to hydration retarders. Aluminium and fluorine, which are common impurities in phosphate rock, form complex aluminofluorides in the phosphoric acid reaction liquor; and gypsum crystallising from this system has its crystal habit and physical properties modified by these complexes. The hemihydrate calcined from the gypsum has a setting time that is less amenable to control by retarder addition than the setting time of pure hemihydrate. The gypsum crystals exhibiting this effect incorporate a solid solution impurity which has been identified as AlF52−substituting for SO42−ions in the cryst

ISSN:0375-9210    

DOI:10.1002/jctb.5020210205

出版商:John Wiley&Sons, Ltd    

年代:1971

数据来源: WILEY

摘要:

AbstractThe chemistry was studied of the complex alumino fluorides produced in the preparation and hydration of CaSO4.1/2H2O derived from by‐product gypsum. Co‐crystalline AlF52−remains unchanged during dry calcination of gypsum to β‐hemihydrate, but when the hemihydrate is mixed with water, dissolution of the host lattice releases the AlF52−ions into the aqueous phase, whereupon dissociation takes place. The products of this dissociation are dependent upon the amount of dissolved phosphate present. In the absence of phosphate the predominant fluoroaluminium ion formed is AlF2+but in the presence of an equimolar, or larger, amount of orthophosphate, AlF(H2PO4)+becomes predominant. Intermediate quantities of phosphate result in proportionate mixtures of products be

ISSN:0375-9210    

DOI:10.1002/jctb.5020210206

出版商:John Wiley&Sons, Ltd    

年代:1971

数据来源: WILEY