An improvement in the method of determining the free caustic soda content of viscose

1984 ◽  
Vol 15 (4) ◽  
pp. 319-321
Author(s):  
O. N. Bobrova ◽  
�. I. Meskina ◽  
T. B. Filicheva ◽  
E. V. Yakanina ◽  
Z. S. Lapkina
Keyword(s):  
Caustic Soda ◽  
Soda Content ◽  
Free Caustic Soda

Method of determining the free caustic soda in viscose

1977 ◽  
Vol 8 (5) ◽  
pp. 553-555
Author(s):  
T. B. Filicheva ◽  
Z. S. Lapkina ◽  
A. B. Pakshver
Keyword(s):  
Caustic Soda ◽  
Free Caustic Soda

Content of free caustic soda as a factor in the properties of the viscose

1978 ◽  
Vol 9 (3) ◽  
pp. 270-272
Author(s):  
T. B. Filicheva ◽  
E. M. Mogilevskii ◽  
A. B. Pakshver ◽  
S. P. Papkov
Keyword(s):  
Caustic Soda ◽  
Free Caustic Soda

scholarly journals Soda and Aluminum Recovery from Spent Etching Baths by Aqueous Precipitation

2012 ◽  
Vol 730-732 ◽  
pp. 642-647
Author(s):  
Andrea Berto ◽  
Carlos A. Nogueira ◽  
Fernanda Margarido
Keyword(s):  
Caustic Soda ◽  
Pollution Prevention ◽  
Industrial Sector ◽  
Major Effect ◽  
Caustic Solution ◽  
Precipitation Reaction ◽  
Aluminum Recovery ◽  
Use Of Resources ◽  
Soda Content ◽  
And Control

The aluminum anodising industry is an important industrial sector that produces great amounts of polluted effluents, which after treatment generate sludge. This fact brings environmental and economical concerns to the companies. Best way to deal with the problem, according to the “prevention strategy” set by the European Directive on Integrated Pollution Prevention and Control, is to implement preventive techniques and technologies to optimise the use of resources and minimise losses, and in turn waste. Among the operations of an anodising line, the etching/satinising stage is responsible for the production of a huge quantity of wastewater neutralisation sludge and for the wrong use of caustic soda. “Caustic etch recovery” technology is claimed to drastically reduce the generation of neutralisation sludge and the purchasing of fresh caustic soda by regenerating the exhausted etching/satinising solution, through an aqueous precipitation reaction. This paper presents the capability of the technology to effectively regenerate the exhausted caustic solution, and investigated the parameters with major effect on the process yield, in order to optimise it. It was demonstrated that the technology effectively recovers the solution, increases its soda content and diminishes the dissolved aluminum content by precipitation. Moreover the conditions that optimise the process are simple and inexpensive. After treatment the solution present the properties to be recycled in the etching/satinising operation.

The oral implications of caustic soda ingestion in children

2006 ◽  
Vol 101 (1) ◽  
pp. 29-34 ◽  
Author(s):  
Fiona Ryan ◽  
Helen Witherow ◽  
Jack Mirza ◽  
Peter Ayliffe
Keyword(s):  
Caustic Soda

scholarly journals An Alternative to Clay in Building Materials: Red Mud Sintering Using Fly Ash via Taguchi’s Methodology

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Suchita Rai ◽  
Dilip H. Lataye ◽  
M. J. Chaddha ◽  
R. S. Mishra ◽  
P. Mahendiran ◽  
...  
Keyword(s):  
Fly Ash ◽  
Construction Industry ◽  
Red Mud ◽  
Morphological Analysis ◽  
Building Materials ◽  
Sintering Temperature ◽  
Bauxite Residue ◽  
Significant Parameter ◽  
Alkaline Waste ◽  
Free Caustic Soda

“Red mud” or “bauxite residue” is a highly alkaline waste generated from alumina refinery with a pH of 10.5–12.5 which poses serious environmental problems. Neutralization or its treatment by sintering in presence of additives is one of the methods for overcoming the caustic problem as it fixes nearly all the leachable free caustic soda present in red mud. In the present study, feasibility of reducing the alkaline nature of red mud by sintering using fly ash as an additive via Taguchi methodology and its use for brick production, as an alternative to clay, is investigated. The analysis of variance (ANOVA) shows that sintering temperature is the most significant parameter in the process. A pH of 8.9 was obtained at 25–50% of red mud and 50–75% fly ash with water and temperature of . Alternatively 50% of red mud can be mixed with 50% of fly ash with water at temperature of to get a pH of about 8.4. The mechanism of this process has been explained with also emphasis on chemical, mineralogical, and morphological analysis of the sintered red mud. The results would be extremely useful in utilization of red mud in building and construction industry.

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