Aluminium hydroxide gel
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Oct 9, 2003
app pub date -
Dec 3, 2002
filing date -
Feb 29, 2000
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The invention relates to a method for producing a stable aluminium hydroxide gel on the basis of the sodium aluminate lye which is obtained during the production of Al.sub.2O.sub.3 according to the BAYER method. The caustic mol ratio (Na.sub.2O.sub.free/Al.sub.2O.sub.3) of the lye containing aluminate is adjusted to smaller than 1.6. The lye is treated with carboxylic acid anhydride, whereby the aluminium hydroxide gel is precipitated at a temperature of below approximately 40.degree. C., whereby the pH value ranges from 8 to 12. The precipitation product and the lye are separated from one another. The precipitation product is washed and dried, whereby the amorphous structure is obtained.
First Claim
Family
International Classification(s)
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