Method of leaching glass preforms

Details Method of leaching glass preforms Method of leaching glass preforms

1980-06-25

1982-03-16

Fisher, Richard V.

Glass manufacturing

Processes

With chemically reactive treatment of glass preform

C03C 2300

Patent

active

043199054

ABSTRACT:
The present invention relates to a method of leaching a glass preform made of alkali borosilicate glass in which the concentration of boric acid in a leaching solution is reduced by precipitating boric acid out of the leaching solution in a cold trap. The preform temperature is kept above 80.degree. C. and the cold trap is at least 20.degree. C. below the temperature of the preform.

REFERENCES:
patent: 2843461 (1958-07-01), Labino
patent: 3758284 (1973-09-01), Haller
patent: 3981706 (1976-09-01), Strack

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