Production of light olefins
Regeneration method with reduced catalyst heat exposure
Chemical conversion process
Conversion of alkanes to gasoline
Multistage process for converting oxygenates to liquid hydrocarbons and ethene Patent #: 4929780
ApplicationNo. 621692 filed on 12/03/1990
US Classes:585/329, Including polymerization of olefin585/640Using metal oxide catalyst
ExaminersPrimary: Garvin, Patrick P.
Assistant: Irzinski, E. D.
Attorney, Agent or Firm
Foreign Patent References
International ClassC07C 001/00
AbstractMoving bed hydrocarbon conversion processes are disclosed wherein a carbonaceous material is deposited on a solid catalyst used in the conversion process to form a coked catalyst which is regenerated in a regeneration zone in order to remove the carbonaceous deposit material from the catalyst and provide a regenerated catalyst having an increased number of active catalyst sites relative to the coked catalyst. The regenerated catalyst is then added to the reaction zone at a rate effective to enhance the conversion to desired products without enhancing the conversion to undesired by-products. When a radial flow reaction zone is employed a relatively constant amount of active catalyst sites can be maintained through the reaction zone by increasing the thickness of annulus through which the catalyst flows in the lower section of the reaction zone wherein the catalyst is more severely coked and has fewer active catalyst sites. The conversion of aliphatic hetero compounds, such as methanol to produce olefins in the C2 -C4 carbon range is specifically exemplified.