Joseph Louis Anjier
Engineering at Overton Dr, Baton Rouge, LA
License number
Louisiana PE.0012871
Issued Date
Sep 21, 1971
Expiration Date
Sep 30, 2017
Category
Civil Engineer
Type
Chemical Engineer
Address
Address
6325 Overton Dr, Baton Rouge, LA 70808
Professional information
Bayer Process Production Of Alumina Hydrate
US Patent:
4511542, Apr 16, 1985
Filed:
May 24, 1984
Appl. No.:
6/613701
Inventors:
Joseph L. Anjier - Baton Rouge LA
Morris L. Roberson - Baton Rouge LA
William E. Atchison - Greenwell Springs LA
Morris L. Roberson - Baton Rouge LA
William E. Atchison - Greenwell Springs LA
Assignee:
Kaiser Aluminum & Chemical Corporation - Oakland CA
International Classification:
C01F 714
US Classification:
423127
Abstract:
An improved precipitation system is provided for the Bayer process production of alumina hydrate. In order to produce coarse and strong alumina hydrate at high yield, supersaturated Bayer process sodium aluminate liquor is seeded with a relatively small seed charge in a first precipitator at a relatively low temperature and the produced slurry is transferred to a second precipitator where without additional seeding, the solids content of the slurry is allowed to increase to about 250-700 g/l by accumulating solids in the line until the desired solids content is reached. After a suitable residence time, a coarse, strong product hydrate can be recovered in yields of or exceeding 80 g/l based on the alumina (Al. sub. 2 O. sub. 3) content of the supersaturated sodium aluminate liquor subjected to precipitation. The process not only produces the desired product at high yield but also, due to the use of a single, small seed charge, the precipitation system requires fewer precipitators and classifiers for a given residence time.
Alumina Hydrate Production From Bayer Liquor By Seeding
US Patent:
4305913, Dec 15, 1981
Filed:
Aug 6, 1980
Appl. No.:
6/175816
Inventors:
Joseph L. Anjier - Baton Rouge LA
Assignee:
Kaiser Aluminum & Chemical Corporation - Oakland CA
International Classification:
C01F 706
US Classification:
423123
Abstract:
A precipitation system is provided for the production of strong, coarse alumina hydrate (Al. sub. 2 O. sub. 3. 3H. sub. 2 O) from Bayer process aluminate liquors. In the system three distinct, but interconnected processing stages are utilized which comprise an agglomeration stage, a growth stage and a seed generation stage. In the agglomeration stage hydrate particles agglomerate to form coarse particles; in the growth stage these particles grow and acquire strength; while in the seed generation stage alumina hydrate seed is generated to be used in the agglomeration and growth stages.
The precipitation system combines the advantages of both the American and European Bayer processes in that it results in the production of a strong, coarse product hydrate and an increased yield.
Utilization Of Partially Calcined Alumina As Precipitation Aid In The Bayer Process
US Patent:
4568527, Feb 4, 1986
Filed:
Nov 6, 1984
Appl. No.:
6/668789
Inventors:
Joseph L. Anjier - Baton Rouge LA
Richard G. Breuer - Los Gatos CA
Harold L. Butler - Baton Rouge LA
Richard G. Breuer - Los Gatos CA
Harold L. Butler - Baton Rouge LA
Assignee:
Kaiser Aluminum & Chemical Corporation - Oakland CA
International Classification:
C01F 714
US Classification:
423127
Abstract:
Finely divided alumina, recovered from the dust recovery systems of alumina hydrate calcination facilities, is employed as seed for the precipitation of alumina hydrate from pregnant Bayer process liquors. The finely divided alumina dust can either be used as seed in as-is condition, or, if desired, agglomerated to coarse and strong particles prior to use as seed. Agglomeration is accomplished by combining the dust in a predetermined weight ratio with alumina trihydrate seed under controlled conditions. The process allows the utilization of an otherwise undesirable and unacceptable by-product of alumina hydrate calcination.