US 4759915
PROCESS FOR EXTRACTING TUNGSTEN FROM ALKALI METAL TUNGSTATE SOLUTIONS
Assignee
GTE PRODUCTS CORPORATION, A CORP. OF DE.
Filed
Oct 11, 1985
Granted
Jul 26, 1988
Location
TOWANDA PA US
Abstract
An improvement is disclosed in a process wherein tungsten values are extracted from an aqueous alkali metal tungstate solution by an organic extractant, and then stripped from the organic with an ammonia solution, the improvement being removing bromine from the major portion of the stripped organic and thereafter using at least a portion of the resulting bromine-free stripped organic to make up at least a portion of the organic extractant.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Mar 17, 1986
Rescinded
Mar 27, 1987
Duration
1 year
Inventor
- 1TAI KYUNG KIM
Record Details
- Patent number
- US 4759915
- Application
- 06786453
- Aerospace match
- No
- Dataset source
- 35 USC §181 SO records
Browse by Assignee
GTE PRODUCTS CORPORATION, A CORP. OF DE.Back to patent indexSource: USPTO 35 USC §181 secrecy order records