Appeal No. 1996-3491
Application 08/213,347
Representative claims 1 and 9 are reproduced below:
1. A process for controlling afterburning in a
fluid catalytic cracking regenerator, comprising:
providing a catalyst bed in the fluid catalytic
cracking regenerator;
providing a regenerator vapor region above the
catalyst bed;
injecting a first and second stream of air into
the catalyst bed, wherein the first and second streams
of air are spaced apart from one another;
taking a temperature measurement in the catalyst
bed;
taking a temperature measurement in the
regenerator vapor region;
calculating the difference between the
temperature of the catalyst bed and the temperature of the
vapor region of the fluid catalytic cracking regenerator as
)T; and
increasing oxygen concentration in one of the
first and second streams of air, when )T has an absolute
value that is greater than a predetermined value, until
the absolute value of )T is less than or equal to
the predetermined value.
9. A process for controlling afterburning in a
fluid catalytic cracking regenerator, comprising:
providing a catalyst bed in the fluid catalytic
cracking regenerator;
providing a regenerator vapor region above the
catalyst bed;
injecting a first and second stream of air into
2
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