Influence of water repellents on the moisture contents of precipitates (filter cakes)

Journal Article · Sat Feb 20 00:00:00 EST 1982 · J. Appl. Chem. USSR (Engl. Transl.); (United States)

OSTI ID:6597324

Barbin, M B; Tkachev, Yu D; Barbin, N M

The influence of water-repellent treatment of galenite with xanthates was studied in experiments on particles in the size range between 189 and 122 ..mu..m. To a suspension of 30 g of galenite in distilled water a definite amount of the given xanthate was added in solution form. After 3 min of stirring with the solution, the suspension was transferred to a filter funnel and experiments were conducted by the method described in previous reports under reduced pressure (66.6 kPa). The experimental final moisture content was calculated from the weight of water after 5 min of suction, and the calculated value was obtained. The dry and moist galenite was weighed on an analytical balance. The results of experiments on removal of water after 5 min of suction from galenite cakes (height approx. 12.5 mm) in presence and absence of xanthates are presented graphically. An equation for the relationship between the moisture contents of filter cakes and the cosine of the contact angle has been derived. This equation was verified by experiments on galenite suspensions containing various amounts of potassium ethyl, butyl, isoamyl, and octyl xanthates, taken as typical water repellents. In the range of xanthate contents from 0 to 1000 g/ton the calculated moisture contents of filter cakes are almost identical with experimental values. The maximum lowering of moisture contents of the cakes is achieved only at the optimal concentrations of water repellents; this effect becomes more pronounced with shortening of the hydrocarbon chain in the xanthate molecule.

• Research Organization: S.M. Kirov Ural Polytechnic Inst., USSR
• OSTI ID: 6597324
• Journal Information: J. Appl. Chem. USSR (Engl. Transl.); (United States), Vol. 54:9; Other Information: Translated from Zh. Prikl. Khim.; 54: No. 9(Sep 1981)
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
LEAD COMPOUNDS
MOISTURE
WATER REMOVAL
XANTHATES
USES
CAKING
EQUATIONS
EXPERIMENTAL DATA
FILTERS
MINERALS
ORGANIC SULFUR COMPOUNDS
POTASSIUM COMPOUNDS
SURFACTANTS
ALKALI METAL COMPOUNDS
DATA
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
REMOVAL
400105* - Separation Procedures