Glass manufacturing – Processes – Fining or homogenizing molten glass
Patent
1994-02-17
1996-01-09
Jones, W. Gary
Glass manufacturing
Processes
Fining or homogenizing molten glass
651359, 65 85, 423305, 423309, 423314, 501 48, 501 76, C03B 516, C01B 1516, C01B 2526, C03C 317
Patent
active
054825261
ABSTRACT:
The instant invention describes a method for preparing a stable, anhydrous non-hygroscopic zinc phosphate compound which is suitable for use as a batch material in the preparation of zinc-phosphate glasses. This method comprises three basic steps: first, forming an aqueous slurry mixture by intimately mixing a mixture containing phosphoric acid and a zinc-containing compound whereby the so-formed slurry mixture is comprised of a mixture of zinc hydrogen phosphates and exhibits a P.sub.2 O.sub.5 /ZnO weight ratio range between about 1.2 to 2.0; second, heating the so-formed slurry mixture to a temperature and for a time sufficient to achieve both a removal of a sufficient amount of water and the phase transformation of the zinc hydrogen phosphates resulting in zinc-phosphate material comprised of granular solid mixture of zinc metaphosphates and zinc pyrophosphate and third, cooling the zinc-phosphate material to room temperature.
REFERENCES:
patent: 2601395 (1952-06-01), Hatch
patent: 3360332 (1967-12-01), Fuchs et al.
patent: 3838998 (1974-10-01), Matthews et al.
patent: 3897236 (1975-08-01), Roberts
patent: 3955956 (1976-05-01), Terner
patent: 4049779 (1977-09-01), Ropp
patent: 4059669 (1977-11-01), Thomas
patent: 4126665 (1978-11-01), Ropp
patent: 4326873 (1982-04-01), Reilly et al.
patent: 4526765 (1985-08-01), Ito et al.
patent: 4846853 (1989-07-01), Chang et al.
patent: 4940677 (1990-08-01), Beall et al.
patent: 4996172 (1991-02-01), Beall et al.
patent: 5043369 (1991-08-01), Bahn et al.
patent: 5071795 (1991-12-01), Beall et al.
patent: 5162267 (1992-11-01), Smyth
patent: 5328874 (1994-07-01), Beall et al.
Hackh's Chemical Dictionary, J. Grant, Copyright 1969, p. 47, Fourth Edition.
Havewala Noshir B.
Morris Kevin T.
Shoup Robert D.
Corning Incorporated
Griffin Steven P.
Jones W. Gary
Nwaneri Angela N.
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