| 简介 |
FIELD : chemistry.SUBSTANCE : invention relates to a catalyst for converting hydrocarbons, which contains zeolite, method of making said catalyst and method of converting hydrocarbon petroleum products on the catalyst. The zeolite-containing catalyst for converting hydrocarbons, which contains zeolite, heat resistant inorganic oxide and optionally clay, is distinguished by that, the said zeolite has MFI structure, which contains phosphorous and transition metals, or a mixture of said zeolite with MFI structure, containing phosphorous and transition metals, with macroporous zeolite, which contains 75 to 100 wt % of the said zeolite with MFI structure in terms of mass of the mixture, containing phosphorous and transition metals, and 0 to 25 wt % macroporous zeolite; wherein the said zeolite with MFI structure, containing phosphorous and transition metals, in terms of mass of oxide, has the following chemical formula without taking water into account : (0 to 0.3)Na2O·(0.03 to 5.5)Al2O3·(1.0 to 10)P2O5·(0.7 to 15)M1xOy·(0.01 to 5)M2mOn·(0.5 to 10)RE2O3·(70 to 97)SiO2 I or (0 to 0.3)Na2O·(0.3 to 5)Al2O3·(1.0 to 10)P2O5·(0.7 to 15)MpOq·(0.5 to 10)RE2O2·(70 to 98)SiO2 II in which M1 is a transition metal, which is chosen from Fe, Co and Ni, M2 is a transition metal, which is chosen from Zn, Mn, Ga and Sn, M is a transition metal, which is chosen from Fe, Co, Ni, Cu, Zn, Mo or Mn, and RE is a rare-earth metal; x is equal to 1 or 2, where if x equals 1, y equals half the valency of transition metal M1, and when x equals 2, y equals valency of transition metal M1; m equals 1 or 2, when m equals 1, n equals half the valency of transition metal M2, and when m equals 2, n equals valency of transition metal M2; p equals 1 or 2, when p equals 1, q equals half the valency of transition metal M, and when p equals 2, q equals valency of transition metal M; the catalyst also contains an auxiliary component, one or more of which are chosen from a group consisting of IVB group metals, group VIII base metals and rare-earth metals of the period table of elements; in terms of catalyst mass, the said catalyst contains 1 to 60 wt % zeolite, 0.1 to 10 wt % auxiliary component of the catalyst, 5 to 98 wt % heat resistant inorganic oxide and 0 to 70 wt % clay in form of oxides. The method of preparing the catalyst involves mixture and suspension of all or part of the heat resistant inorganic oxide and/or its precursor, water and optionally clay, addition of zeolite and drying the obtained suspension, addition of auxiliary compound before addition of zeolite and before or after addition of clay, addition of acid to establish pH of the suspension equal to 1 to 5, ageing at 30 to 90°C for 0.1 to 10 hours and addition of the remaining heat resistant inorganic oxide and/or its precursor after ageing.EFFECT : obtained catalyst has high activity and stability and is highly capable of converting petroleum hydrocarbons with high output of propylene, ethylene and lower aromatic hydrocarbons.20 cl, 24 ex, 5 tbl |
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