| 摘要 |
FIELD: process engineering.SUBSTANCE: invention relates to oil processing industry, particularly, to oil fractions cracking catalyst. Proposed catalyst comprises ultra stable zeolite Y in cation-decationated form with lattice module of 5.2-6.0 containing 1.0-1.5 wt % of sodium oxide, 10-14 wt % of rare-earth metal oxides, and/or ultra stable zeolite with lattice module of 6.0-10.0 containing 0.5-1.0 wt % of sodium oxide, 7-10 wt % of rare-earth metal oxides, and matrix wherein amorphous alumina silicate, aluminium hydroxide and bentonitic clay making its components in the following ratio in wt %: zeolite Y or mix of zeolites Y 15-30, amorphous alumina silicate 20-45, aluminium hydroxide 10-40, and bentonitic clay 10-40. Proposed method comprises conducting ionic replacement by cations of rare-earth metals and ammonium on zeolite NaY, ultra stabilisation of zeolite by steam, mixing zeolite with matrix components, i.e. amorphous alumina silicate, aluminium hydroxide and bentonitic clay, spray drying, calcining and making catalyst. Note here that ultra stabilisation of zeolite is conducted in rotary kiln one or two times unless mixing with matrix components. Note also that zeolite filtration is carried out in countercurrent. Note that filtrates of next stages of ionic replacement is used as flushing fluids at previous stages while ionic replacement of sodium cations in zeolite by ammonium cations is conducted two or three times.EFFECT: high activity of catalyst and high octane number of gasoline.4 cl, 2 tbl, 16 ex |
