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1. US6408650 - Nitrate/nitrite-free manufacturing of glass with selenium

Office
United States of America
Application Number 08988481
Application Date 10.12.1997
Publication Number 6408650
Publication Date 25.06.2002
Grant Number 6408650
Grant Date 25.06.2002
Publication Kind B1
IPC
C03B 5/16
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL; SUPPLEMENTARY PROCESSES IN THE MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL
5Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
16Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
C03C 1/00
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
CCHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
1Ingredients generally applicable to manufacture of glasses, glazes or vitreous enamels
C03C 1/10
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
CCHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
1Ingredients generally applicable to manufacture of glasses, glazes or vitreous enamels
10to produce uniformly-coloured transparent products
C03C 3/076
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
CCHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
3Glass compositions
04containing silica
076with 40% to 90% silica by weight
C03C 3/087
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
CCHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
3Glass compositions
04containing silica
076with 40% to 90% silica by weight
083containing aluminium oxide or an iron compound
085containing an oxide of a divalent metal
087containing calcium oxide, e.g. common sheet or container glass
C03C 4/00
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
CCHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
4Compositions for glass with special properties
CPC
C03C 3/087
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
3Glass compositions
04containing silica
076with 40% to 90% silica, by weight
083containing aluminium oxide or an iron compound
085containing an oxide of a divalent metal
087containing calcium oxide, e.g. common sheet or container glass
C03C 1/10
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
1Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
10to produce uniformly-coloured transparent products
C03C 4/02
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
4Compositions for glass with special properties
02for coloured glass
C03C 4/082
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
4Compositions for glass with special properties
08for glass selectively absorbing radiation of specified wave lengths
082for infra-red absorbing glass
C03C 4/085
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
4Compositions for glass with special properties
08for glass selectively absorbing radiation of specified wave lengths
085for ultra-violet absorbing glass
Y10S 501/904
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
501Compositions: ceramic
90Optical glass, e.g. silent on refractive index and/or ABBE number
904Infrared transmitting or absorbing
Applicants Ford Global Technologies, Inc.
Inventors Boulos, Edward Nashed
Jones, James Victor
Agents Porcari, Damian
Priority Data 08988481 10.12.1997 US
Title
(EN) Nitrate/nitrite-free manufacturing of glass with selenium
Abstract
(EN)

The invention is a method of retaining selenium in a lass containing selenium by including a manganese compound and not including nitrates or nitrites routinely used in the industry to retain selenium. Particularly, a preferred embodiment involves manufacturing a gray soda-lime-silica glass composition including selenium as a colorant, the components of the gray soda-lime-silica glass have colorants consisting essentially of: greater than 0.9 to 1.9 wt. % total iron oxide as Fe2O3; 0.10 to 1.00 wt. % manganese compound as MnO2; 0.0010 to 0.0060 wt. % selenium as Se; 0.002 to 0.025 wt. % cobalt oxide as Co, and 0 to 1.0 wt. % titanium oxide as TiO2which are combined and melted to make the glass composition. The glass composition has at 4.0 mm. thickness: 10 to 55% light transmittance using Illuminant A, less than 25% ultra violet transmittance, and less than 50% infra red transmittance.