05443736 is referenced by 5 patents and cites 5 patents.

The invention is for a process of removing organic contaminants and multivalent metal ions from solution. The process comprises chelating multivalent metal ions in an organic solution to be purified and contacting the solution with activated carbon. The process is especially useful for removal of multivalent metal ions from a solution of photoresist components.

Title
Purification process
Application Number
8/139923
Publication Number
5443736
Application Date
October 20, 1993
Publication Date
August 22, 1995
Inventor
Richard J Carey
Sherborn
MA, US
Charles R Szmanda
Westborough
MA, US
Agent
Robert L Goldberg
Assignee
Shipley Company
MA, US
IPC
B01D 15/00
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