Paraffin hydrocarbon shape selective isomerization catalyst, preparation method and application thereof
A catalyst and a technology for paraffin hydrocarbons, which are applied in the field of paraffin hydrocarbon shape-selective isomerization catalysts and their preparation, can solve the problems of easy cracking, low activity and selectivity, weak catalyst acidity, etc., and achieve low pour point and product yield. High, high viscosity index effect
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[0023] Provide a kind of specific preparation method of catalyst of the present invention below, but not limited to this method, concrete steps are:
[0024] (1) loading the rare earth on the molecular sieve, drying and roasting to obtain the rare earth modified molecular sieve;
[0025] (2) loading the halogen on the inorganic refractory oxide, drying and roasting to obtain the halogen modified inorganic refractory oxide;
[0026] (3) Fully kneading rare earth modified molecular sieves, halogen modified inorganic refractory oxides, extrusion aids, water and peptizing agent into a plastic paste, extrusion molding, drying and roasting to obtain the catalyst carrier of the present invention.
[0027] (4) The active metal-containing component is loaded on the carrier by a conventional impregnation method, and then dried and calcined to obtain the paraffin hydrocarbon shape-selective isomerization catalyst of the present invention.
[0028] The rare earth described in step (1) ca...
Embodiment 1
[0039] The preparation of the comparative catalyst E-1 of the present invention.
[0040] (1) Preparation of ZSM-22 molecular sieve
[0041] ZSM-22 used in the present invention is prepared according to the method of Chinese Patent CN1565969A Example 1, and the obtained molecular sieve has a silicon-aluminum molar ratio of 92 and a specific surface area of 223m 2 / g, pore volume 0.21mL / g.
[0042] The zeolite synthesized above contains alkali metal or alkaline earth metal cations, which are exchanged with ammonium cations, and then roasted in the air at 316°C to 540°C for 1 to 10 hours, and the obtained acidic molecular sieve is numbered S-1, which forms acidic zeolite are well known in the art.
[0043] (2) getting 1000 grams of mass concentration as lanthanum nitrate solution of 20% (calculated as lanthanum oxide) and 800 grams of S-1 molecular sieves is fully mixed, then dried at 130°C for 24 hours, and roasted at 750°C for 3 hours, A modified S-1 molecular sieve with ...
Embodiment 2
[0048] The preparation of catalyst E-2 of the present invention
[0049] The preparation process of the catalyst E-2 of the present invention is the same as in Example 1, except that cerium nitrate is used to replace lanthanum nitrate, and the prepared catalyst of the present invention is numbered E-2, its physicochemical properties are shown in Table 3, and the reaction results are shown in Table 4 .
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