Processing feedstocks
AssigneeChevron U.S.A. Inc.
InventorsSven Ivar Hommeltoft, William Richard Boorujy
Life of this patent
Estimating the term…
Abstract
Some examples herein provide a method of processing a feedstock. The feedstock may be flowed into a reactor. A catalyst may be flowed into the reactor. Within the reactor, the feedstock may be converted over the catalyst, at an average reaction temperature, to a product stream. The product stream may be withdrawn from the reactor. A stream of the catalyst may be withdrawn from the reactor. Said stream of the catalyst may be heated to a temperature above the average reaction temperature without exposing the catalyst to any air or other oxidants. The heated stream of catalyst may be returned to the reactor at a temperature higher than the reaction temperature, to obtain the average reaction temperature within the reactor.
Claims36
A method of processing a feedstock, the method comprising:
- flowing a feedstock into a reactor;
- flowing a catalyst into the reactor;
- within the reactor, converting the feedstock over the catalyst, at an average reaction temperature, to a product stream;
- withdrawing the product stream from the reactor;
- withdrawing a first stream of the catalyst from the reactor, wherein the first stream of catalyst is withdrawn from the reactor into a riser comprising a wall;
- heating said first stream of the catalyst to a temperature above the average reaction temperature without exposing the catalyst to any air or other oxidants, wherein the first stream of catalyst is heated using heat transfer through the wall;
- and
- returning the heated first stream of catalyst to the reactor at a temperature higher than the average reaction temperature, to obtain the average reaction temperature within the reactor.
A system for processing a feedstock, the system comprising:
- a reactor;
- piping configured to flow a feedstock into the reactor;
- piping configured to flow a catalyst to the reactor to convert the feedstock over the catalyst, within the reactor, at an average reaction temperature, to a product stream;
- piping configured to withdraw the product stream from the reactor;
- piping configured to withdraw a first stream of the catalyst from the reactor;
- a riser including a wall, wherein piping withdraws the first stream of catalyst from the reactor into the riser;
- a heater configured to heat said first stream of the catalyst using heat transfer through the wall to a temperature above the average reaction temperature without exposing the catalyst to any air or other oxidants;
- and
- piping configured to return the heated first stream of catalyst to the reactor at a temperature higher than the average reaction temperature, to obtain the average reaction temperature within the reactor.
Dependencies are inferred from the claim text.