Other

The Boeing Company

Engelhard Corporation

The Harshaw Chemical Company

Harshaw/filtrol Partnership

Steven L McMahon

Eugene Nebesh

Robert A Plundo

Robert Scott Smith

Joseph L Koncsek

Michael L Sangwin

Myron L Bultman

Methods and apparatus for controlling aircraft inlet air flow. The apparatus can include an external flow surface having a forward portion, and an engine inlet positioned at least proximate to the external flow surface and aft of the forward portion. The engine inlet can have an aperture and can be coupled with an engine inlet duct to an engine location. An auxiliary flow duct can be positioned at least proximate to the external flow surface and can include a first opening and a second opening spaced apart from the first opening. The first opening can be positioned to receive flow from the external flow surface during at least a first portion of an operating schedule of the propulsion system. The auxiliary flow duct can be configured to direct air to the engine location during at least a second portion of the operating schedule of the propulsion system. In one embodiment, boundary layer flow developed over the external flow surface can be diverted through the auxiliary flow duct, for example, during cruise operation, and auxiliary air flow can be provided to the engine through the auxiliary flow duct, for example, during takeoff operation.

Method and apparatus for controlling aircraft inlet air flow

This invention provides a method of preparing an isomerization catalyst by contacting an alkali metal with catalyst support particles in a fluidized bed. After the alkali metal is uniformly dispersed on the support particles, oxygen is added to the fluidizing gas to oxidize a portion of the alkali metal.

Method of preparing isomerization catalyst

Boundary layer control apparatus is provided (22). The boundary layer control apparatus (22) is for use with an aircraft propulsion nacelle (12) positioned such that the air inlet (14) of the propulsion nacelle is located proximate an aircraft surface (10), wherein a boundary layer is established on the surface when the aircraft is propelled through an atmosphere, causing air to flow over the surface. The boundary layer control apparatus (22) includes a duct having an entrance (24) positioned between the aircraft surface (10) and the inlet (14) of the propulsion nacelle (12) for capturing the boundary layer air passing over the aircraft surface and diverting the boundary layer air away from the inlet.

Ducted boundary layer diverter

A hydrotreating catalyst is described which comprises at least one Group VI metal, metal oxide, or metal sulfide, and at least one Group VIII metal, metal oxide, or metal sulfide, supported on a carrier wherein (A) the catalyst comprises from about 10% to about 35% by weight of combined metal, and the atomic ratio of the Group VIII metal to Group VI metal is in the range of from about 0.5:1 to about 2:1; (B) the carrier comprises from about 0.5 to about 10 weight percent of halogen, from about 0.5 to about 5% by weight of silica and from about 85 to about 99% of alumina; and (C) the catalyst is characterized as having a median pore radius of from about 30 to about 65 Angstroms, and a surface area of from about 120 to about 180 m.sup.2 /g. Also described are novel and improved procedures for preparing the catalyst is useful in the production of lubricating oils from crude hydrocarbon oil stocks in that the hydrotreating process results in the formation of oils having increased viscosity indexes, reduced aromatic content and improved stability. The catalysts of this invention can be used effectively in either or both stages of a two-stage hydrotreating process or in a single stage hydrotreating process. The nitrogen and sulfur contents of the oils also are reduced through the use of the catalyst in the hydrogenation process.

Hydrotreating catalyst and process

A hydrotreating catalyst is described which comprises at least one Group VI metal, metal oxide, or metal sulfide, and at least one Group VIII metal, metal oxide, or metal sulfide, supported on a carrier wherein (A) the catalyst comprises from about 10% to about 35% by weight of combined metal, and the atomic ratio of the Group VIII metal to Group VI metal is in the range of from about 0.5:1 to about 2:1; (B) the carrier comprises from about 0.5 to about 10 weight percent of halogen, from about 0.5 to about 5% by weight of silica and from about 85 to about 99% of alumina; and (C) the catalyst is characterized as having a median pore radius of from about 30 to about 65 Angstroms, and a surface area of from about 120 to about 180 m.sup.2 /g. Also described are novel and improved procedures for preparing the carrier or support used to prepare the catalysts. The catalyst is useful in the production of lubricating oils from crude hydrocarbon oil stocks in that the hydrotreating process results in the formation of oils having increased viscosity indexes, reduced aromatic content and improved stability. The catalysts of this invention can be used effectively in either or both stages of a two-stage hydrotreating process or in a single stage hydrotreating process. The nitrogen and sulfur contents of the oils also are reduced through the use of the catalyst in the hydrogenation process.

A hydrotreating catalyst is described which comprises at least one Group VI metal, metal oxide, or metal sulfide, at least one Group VIII metal, metal oxide, or metal sulfide, and a halogen supported on a carrier wherein

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Macedonia, OH, United States of America

Steven L McMahon