Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...
Patent
1993-02-03
1994-09-13
Group, Karl
Compositions: ceramic
Ceramic compositions
Glass compositions, compositions containing glass other than...
501 59, 501 66, 501 70, 65376, C03C 1300
Patent
active
053468643
ABSTRACT:
The invention provides a process which makes it possible to regulate the degree of oxidation-reduction of a glass during its production.
According to the invention, which relates to glasses intended to be transformed into continuous or staple fibers containing at most about 1% by weight of Fe.sub.2 O.sub.3, the degree of oxidation of the glass is obtained by incorporating in the mixture of vitrifiable products at least two oxidizing agents, one of them being an inorganic nitrate, the other being, according to preference, an oxidized compound of manganese in which the oxidation state of the manganese is greater than 2, potassium dichromate and/or ceric oxide.
The invention particularly favors the recycling of waste from products with a glass fiber base in the vitrifiable mixture.
REFERENCES:
patent: Re25312 (1960-05-01), Duncan et al.
patent: 3853569 (1974-12-01), Laurent et al.
patent: 3929497 (1975-12-01), Clark-Monks
patent: 4138235 (1979-02-01), Turaler
"Hanley's Condensed Chemical Dictionary" by Irving Sax et al., p. 730.
"Introduction to Glass Science", Edited by L. D. Pye et al., pp. 415-416, 1972 (Published by Plenum Press).
"Technology for the Production of Glass", p. 282 (Published by Fu Wen Bookstore), no date.
Gomozova et al., Metallurgical Waste in the Production of Smalt, Glass and Ceramics J., vol. 46, Nos. 3/4, Mar./Apr. 1989, Plenum Publishing Corp., New York, N.Y.
Sax et al. Hawley Condensed Chemical Dictionary, 1987, pp. 863, 1066, 728, 206.
Dubois Bernard
Maugendre Stephane
Group Karl
Saint-Gobain Recherch
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