| 简介 |
FIELD : chemistry.
SUBSTANCE : present invention relates to a composition of a catalytic cracking composition, a method of obtaining said composition and a method for catalytic cracking hydrocarbon starting material and use thereof. Described is a composition of a catalytic cracking catalyst containing at least one zeolite having activity on catalytic cracking in catalytic cracking conditions, and aluminium oxide obtained from aluminium sulphate in an amount which is sufficient for binding particles and forming a dispersion catalyst composition, characterised by Davison index less than 30, where said catalyst composition is obtained using a method involving : a) formation of a homogeneous or essentially homogeneous aqueous suspension containing particles of at least one zeolite, having activity on catalytic cracking in catalytic cracking conditions, at least one matrix material selected from a group consisting of aluminium oxide, silicon dioxide, silicon dioxide-aluminium oxide, transition metal oxides selected from groups 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 in accordance with new denominations in the periodic table, rare-earth metal oxides, alkali-earth metal oxides and mixtures thereof, and aluminium sulphate in an amount which is sufficient to obtain at least 5 wt % aluminium oxide in the end catalyst composition; b) grinding the suspension; c) spray drying the suspension to form particles; d) calcining the spray dried particles at temperature ranging from approximately 150°C to approximately 600°C for a period of time ranging from approximately 2 hours to approximately 10 minutes; e) re-suspension of the calcined particles in aqueous solution of a base at pH ranging from approximately 7 to approximately 13 for a period of time ranging from 1 minute to approximately 3 hours and at temperature ranging from approximately 1°C to approximately 100°C; and f) extracting and drying the obtained particles in order to obtain the end catalyst composition containing at least 5 wt % aluminium oxide obtained from aluminium sulphate. The invention describes a method of obtaining the composition and use thereof in a method for catalytic cracking hydrocarbon starting material.
EFFECT : improved operational characteristics of the composition, reduced formation of coke product and achieving high degree of conversion when cracking still residue.
21 cl, 6 tbl, 10 ex |
客服热线：
手机版
二维码
