| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to processing different starting material through catalytic cracking with a fluidised catalyst bed. The invention pertains to a method for catalytic cracking with a fluidised catalyst bed designed for increasing output of C3 and C4 hydrocarbons, involving: (a) feeding main starting material which contains hydrocarbons, characterised by boiling point in the range from 400F (204C) to 1150F (621C), into a catalytic cracking reactor with an ascending fluidised catalyst bed through a set of injectors for the main starting material which has a section inclined to downwards and a vertical section downstream the said inclined section; (b) feeding light starting material containing hydrocarbons, characterised by boiling point which does not exceed approximately 440F (227C), into the said apparatus for catalytic cracking with a fluidised catalyst bed through a first injector for light starting material lying in the bottom part of the reactor and through a second injector for light material lying on the inclined section of the reactor above the first injector for light material. The first and second light material injectors are near points where the catalyst stream changes direction and is not uniform. ^ EFFECT: higher output of C3 and C4 hydrocarbons. ^ 24 cl, 3 ex, 4 tbl, 8 dwg |
