Patent ID: 9731996
Date: 2017-08-15
CPC Classifications: C03C

Claim:
1. A method of manufacturing a controlled pore glass comprising: a. adding an acidic solution to a cylindrical column containing borosilicate glass; b. flushing the column from step (a) with an aqueous solution until the pH of effluent flowing out of the column is greater than about 6; c. adding a basic solution to the column from step (b); and d. flushing the column from step (c) with an aqueous solution until the pH of effluent flowing out of the column is less than about 9 to produce a controlled pore glass having a structure that differs from the borosilicate glass of step (a), wherein at least about 75% of the controlled pore glass have pore sizes within about ±25% of the average pore size.