C - Chemistry – Metallurgy – 03 – C
Patent
C - Chemistry, Metallurgy
03
C
117/101, 49/77
C03C 21/00 (2006.01) C03C 3/06 (2006.01) C03C 11/00 (2006.01) C03C 17/02 (2006.01)
Patent
CA 1084710
Abstract of the Disclosure The present invention relates to the production and chemical treatment of sodium and/or potassium hydrosilicate glasses containing about 5-50% by weight water within the glass structure, wherein the Na+ and/or K+ ions are capable of being partially completely replaced, on an electro- lytically equivalent basis, by protons and/or other monovalent and polyvalent cations species, to make glass articles whose alkali metal oxide content is substantially diminished or completely removed. Such glass articles can be either completely dense, or microporous, with pores ranging down to molecular size. Moreover, the chemical compositions of such microporous glasses can be further altered to include many other chemical species including polyvalent cations, anions and neutral molecular species, both organic and inorganic, and including complex ions such as metal amine complexes, where such species are capable of being sorbed on the porous glass by physical or chemical forces or both. The instant invention provides means for replacing part or all of the Na+ and/or K+ ions in an alkali silicate hydrosilicate amorphous body either with protons, or with protons plus other monovalent or polyvalent cations, in the nondestructive manner by reaction in aqueous solutions. In addition, it provides means for incorporating many other chemical species into the ion-exchange microporous body at low temperature, by sorption from solutions, either aqueous or nonaqueous. These latter species are not necessarily cations. The processes of the invention make possible the alteration of the chemical composition of alkali hydrosilicate body to any of a wide variety of other glass compositions having better chemical durability and other useful glass properties.
250626
Meissner Helmuth E.
Pierson Joseph E.
Shoup Robert D.
Stookey Stanley D.
Corning Glass Works
Gowling Lafleur Henderson Llp
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