John Robert Andersen

US Patent:

7302318, Nov 27, 2007

Filed:

Mar 10, 2006

Appl. No.:

11/372565

Inventors:

Daniel A Gerrity - Bellevue WA, US
Jason E Dougherty - Renton WA, US
John H Andersen - Tacoma WA, US
Stephen D Fulton - Federal Way WA, US

Assignee:

Naverus, Inc. - Renton WA

International Classification:

G06F 19/00

US Classification:

701 16, 701 18, 701301, 340903, 340970

Abstract:

A method () is disclosed for designing an RNP approach for an aircraft at a particular runway (). The method includes selecting a runway (), gathering obstacle data for the obstacle evaluation area (), selecting a VEB method and terms (), laying out a preliminary approach, inducing a missed approach segment (), calculating a preliminary obstacle clearance surface (), calculating a momentary descent segment using a physical model of the aircraft (), adjusting the obstacle clearance surface so that no obstacles intersect the surface (), and optionally optimizing the approach by departing from the operator's standard procedures (). Preferably, the obstacle clearance surface is adjusted so that it just touches an obstacle, without any object intersecting the surface, thereby providing an optimal decision altitude.

US Patent:

41608097, Jul 10, 1979

Filed:

Jul 24, 1978

Appl. No.:

5/927084

Inventors:

John N. Andersen - Moraga CA
Norman Bell - Livermore CA

Assignee:

Kaiser Aluminum & Chemical Corporation - Oakland CA

International Classification:

C01F 704
C01B 719

US Classification:

423119

Abstract:

Fluoridic spent and waste materials, such as are generated in electrolytic aluminum reduction systems, are pyrohydrolyzed in a fluidized bed reactor. For fluidization of these materials, as well as for the combustion of carbon present in the materials, an O. sub. 2 -containing gas stream, containing at least about 90% by volume O. sub. 2, is employed. This results in the generation of an HF-containing offgas of significantly increased HF level, which can be employed for the manufacture of an AlF. sub. 3 product of at least about 85% by weight AlF. sub. 3 content from hydrated alumina. The offgas having the increased HF content can also be employed for the production of highly concentrated HF acid with significantly lower energy requirement needed for concentration than in conventional systems.

US Patent:

41587014, Jun 19, 1979

Filed:

Nov 6, 1978

Appl. No.:

5/958061

Inventors:

John N. Andersen - Moraga CA
Norman Bell - Livermore CA

Assignee:

Kaiser Aluminum & Chemical Corporation - Oakland CA

International Classification:

C01F 704
C01B 722

US Classification:

423119

Abstract:

A pyrohydrolysis system is provided for the recovery of valuable components from waste and spent materials generated in electrolytic aluminum reduction facilities. The pyrohydrolysis system employs a dense phase fluidized bed reaction zone for the pyrohydrolysis of coarse feed, a dilute phase fluidized reaction zone for pyrohydrolyzing fine feed, this zone being superimposed and interconnected with the dense phase zone. The offgases, after removal of the solids, are contacted in a dilute phase fluidized zone, with a source of Al. sub. 2 O. sub. 3 to remove residual Na values and to produce Na-free HF. The solids from the first dilute zone, having a desired high Na:Al atom ratio, can be combined with the product clinker from the dense bed zone. The offgas, containing the source of Al. sub. 2 O. sub. 3, is subjected to solids separation, the solids-free and Na-free HF is utilized, while the solids of low Na:Al mole ratio are recycled to the residual Na conversion step.

US Patent:

41608089, Jul 10, 1979

Filed:

May 30, 1978

Appl. No.:

5/910416

Inventors:

John N. Andersen - Moraga CA
Norman Bell - Livermore CA

International Classification:

C01F 704
C01B 719

US Classification:

423119

Abstract:

An improved process is provided for the recovery of HF in increased yield from spent aluminum reduction cell linings. The spent linings are pyrohydrolyzed in a fluidized bed reactor and the generated Na-containing vapors and gases are then contacted with a relatively finely divided source of Al. sub. 2 O. sub. 3. Contacting is preferably accomplished in the close vicinity of the fluidized bed to obtain extended reaction between the Al. sub. 2 O. sub. 3 source and the vapors. This extended reaction allows conversion of the Na-containing compounds, such as NaF and Na. sub. 2 O to HF and an Na. sub. 2 OxAl. sub. 2 O. sub. 3 compound.