Mineral oils: processes and products – Chemical conversion of hydrocarbons – Solids contacting and mixing
Patent
1978-08-07
1980-07-08
Levine, Herbert
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Solids contacting and mixing
208DIG1, 252417, C10G 1118
Patent
active
042116376
ABSTRACT:
In the fluid catalytic cracking process, improved adaptive behavior of the catalyst section with the regenerator operating in the complete CO-burning mode is achieved by including within the regenerator, as an element of control, variable recycle of regenerated to spent catalyst. In response to excursions of the regenerated catalyst temperature, such as would be caused by change of feedstock, the recycle ratio is altered in a direction to restore the temperature to a predetermined value. The improved control system extends the useful control range, and it also diminishes counterproductive changes in severity induced by disturbances such as change of feedstock quality.
REFERENCES:
patent: 3316170 (1967-04-01), Stewart et al.
patent: 3886060 (1975-05-01), Owen
patent: 3893812 (1975-07-01), Conner et al.
Gross Benjamin
Lee Wooyoung
Frilette Vincent J.
Huggett Charles A.
Levine Herbert
Mobil Oil Corporation
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