Recovery of sodium hydroxide and aluminum hydroxide from etching waste
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 17, 1991
Grant Date -
N/A
app pub date -
Jul 6, 1990
filing date -
Jul 6, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for the recovery and recycling of sodium hydroxide from the waste solution of aluminum etching operations. The method utilizes a dialysis membrane column or stack to initially remove sodium hydroxide from the waste solution and return it to the etch tank base solution sufficiently concentrated to carry on the basic etching operation. The method permits the recovery of salable quantities of aluminum hydroxide.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully