Apparatuses and methods for cracking hydrocarbons
AssigneeUop LLC
InventorsThomas William Lorsbach, Paolo Palmas, Richard A. Johnson, II, Miladin Crnkovic
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Abstract
Methods and apparatuses are provided for cracking a hydrocarbon. The method includes contacting a hydrocarbon feed stream with a cracking catalyst at cracking conditions to produce a reactor effluent and a spent catalyst. The spent catalyst is transferred to a regenerator, where it is regenerated by contact with an oxygen supply gas at regeneration conditions to produce a regenerated catalyst. The regenerated catalyst is fluidized for catalyst movement with a replacement gas having less than 1 mass percent oxygen gas
Claims20
A method of cracking hydrocarbons, the method comprising the steps of:
- contacting a hydrocarbon feed stream with a cracking catalyst at cracking conditions in a reactor to produce a reactor effluent and a spent catalyst;
- transferring the spent catalyst from the reactor to a regenerator;
- regenerating the spent catalyst in the regenerator to produce regenerated catalyst by contacting the spent catalyst with an oxygen supply gas at regeneration conditions;
- and
- fluidizing the regenerated catalyst in the regenerator with a replacement gas for catalyst movement, wherein the replacement gas comprises less than 1 mass percent oxygen gas.
A method of cracking hydrocarbons, the method comprising the steps of:
- combusting coke from a spent catalyst to produce a regenerated catalyst and a combustion gas by contacting the spent catalyst with an oxygen supply gas at regeneration conditions;
- stripping the combustion gas from the regenerated catalyst by passing a replacement gas through the regenerated catalyst, wherein the replacement gas comprises less than 1 mass percent oxygen gas;
- and
- cracking the hydrocarbons by combining the hydrocarbons with the regenerated catalyst at cracking conditions to produce the spent catalyst.
An apparatus for cracking hydrocarbons comprising:
- a reactor;
- a regenerator;
- a spent catalyst transfer line configured to transfer a spent catalyst from the reactor to the regenerator;
- an oxygen supply gas inlet coupled to the regenerator, wherein the oxygen supply gas inlet is configured to provide an oxygen supply gas to convert the spent catalyst into a regenerated catalyst, and to transfer the regenerated catalyst into a regenerator separator area of the regenerator;
- and
- a fluidizing gas inlet coupled to the regenerator, wherein the fluidizing gas inlet is configured to provide a fluidizing gas different than the oxygen supply gas to the regenerator separator area.
Dependencies are inferred from the claim text.