| 摘要 |
Catalyst contains 20-99 weight % of a matrix, 1-80 weight % of 2:1 trioctahedral phyllosilicate containing fluorine, 0-30 weight % of zeolite Y and a catalytic element. Also claimed is catalyst having 2:1 trioctahedral phyllosilicate synthesised at pH < 7. It has: (a) a general formula (I) (for half unit cell); where S is an element chosen from monovalent Li elements, divalent Zn, Ni, Co, Mn, Fe, and Cu elements and trivalent Al and Ga elements; T is a compound formed by an element from group IIIA of the periodic table and iron; M is a compensation cation from the reaction medium, or introduced by an ion-exchange technique chosen from cations of groups IA, IIA and VIII of the period table, proton, organic cations containing nitrogen, ammonium and rare earth cations; m is the valence of M; x is an integer between 0-2; y is between 0 and 1; z is between 0 < z ≤ 2; n is real positive number or zero; epsilon = 1 when S is a monovalent element; epsilon = 0 when S is a divalent element; epsilon = -1 when S is a trivalent element; (b) an x-ray diffraction pattern consisting of the following peaks - one peak with dhki = 1.52 plus or minus 0.01 10<-10> m - two other peaks with dhki = 4.53 plus or minus 0.02 10<-10> m and 2.56 plus or minus 0.045 10<-10> m and a 001 reflection such that d001 = 10.5 and 19.5 10<-10> m, according to the chemical formula of phyllosilicate; (c) a fluorine content such that the F/Si ratio is 0.1-4. Also claimed is preparation of the catalyst comprising impregnating the support with a solution of group VI elements then calcining and/or simultaneously or after, with a solution containing group VIII elements, then calcining. Also claimed is hydrocracking of heavy fraction using the catalyst described in this invention being carried out at a temperature greater than 230 degrees C, pressure greater than 2 MPa, hydrogen at 1001/l of fraction and spatial velocity of 0.2-10 h<-1>.
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