Reforming pre-hydrogenation catalyst with aromatization property and preparation method thereof
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A pre-hydrogenation and catalyst technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of reducing olefin content in oil products, losing gasoline octane number, etc. Structuring and aromatization properties, and the effect of increasing the latent content of aromatics
Active Publication Date: 2015-02-11
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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Although the catalyst has certain hydrodesulfurization and denitrogenation activities, it reduces the olefin content of oil and loses the octane number of gasoline
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Embodiment 1
[0025] (1) Preparation of molded carrier
[0026] Weigh 300g of pseudoboehmite powder produced by Wenzhou Jingjing Alumina Co., Ltd., 50g of HZSM-5 molecular sieve produced by Nankai University Catalyst Factory, 10g of turnip powder, 10g of nitric acid (65%) and 250ml of deionized water, mix well , Knead into a plastic shape and then extrude wet strips of clover strips (Φ1.5mm). The wet strip was dried at 110° C. for 4 hours and calcined at 550° C. for 4 hours to obtain a molded carrier.
[0027] (2) Catalyst preparation
[0028] At room temperature, weigh 31.2 g of ammonium molybdate, 12.0 g of nickel nitrate, and 6.0 g of cobalt nitrate into 50 ml of deionized water to make an impregnation solution, and then add ammonia water to adjust the pH value of the impregnation solution to 5.0. Take 70g of the above shaped carrier and put it into a 500ml beaker, add the above impregnation solution for saturated impregnation, then dry the wet strip at 120°C for 4h, and then bake it a...
Embodiment 2
[0030] (1) Carrier preparation
[0031] Same as Example 1 (1), except that HZSM-5 molecular sieve is not added during the carrier preparation process.
[0032] (2) Catalyst preparation
[0033] Same as in Example 1 (2), the finished catalyst B1 was finally obtained.
Embodiment 3
[0035] (1) Carrier preparation
[0036] Same as Example 1(1).
[0037] (2) Catalyst preparation
[0038] Same as Example 1 (2), except that ammonia water was used to adjust the pH of the impregnation solution to 8.0, and finally the finished catalyst C1 was obtained.
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Abstract
The invention discloses a reforming pre-hydrogenation catalyst with aromatization property. The reforming pre-hydrogenation catalyst is characterized by being prepared by the following steps of: mixing and kneading pseudo-boehmite powder, an HZSM-5 molecular sieve, a peptizing agent and an additive till turning into a moldable mixture, carrying out extrusion molding, drying and roasting to obtain a molding carrier; and adding a molybdenum salt, a nickel salt and a cobalt salt to deionized water to obtain a Ni-Mo-Co co-impregnation liquid, adjusting the pH value of the impregnation liquid to 3-11, then carrying out saturated impregnation, drying and roasting the molding carrier to obtain the reforming pre-hydrogenation catalyst. The active components of the catalyst comprise 15.0-30.0% of MoO3, 1.0-5.0% of NiO, 1.0-5.0% of CoO, 10-15% of HZSM-5 molecular sieve and the balance of the aluminum oxide according to mass percentage, and the specific surface area of the catalyst is 200-400m<2> / g, and the pore volume of the catalyst is 0.30-0.60ml / g. The invention also provides a catalyst preparation method. The catalyst increases the potential aromatic content of oils under the condition of ensuring the desulfurization and denitrification effects.
Description
technical field [0001] The invention belongs to the hydrogenation refining technology of petroleum hydrocarbon products, and relates to a reforming prehydrogenation catalyst and a preparation method thereof. Background technique [0002] Catalytic reforming technology is the main process for producing aromatics and high-octane gasoline components from naphtha, and the by-product hydrogen is an important source of hydrogen for hydrogenation units. With the increasingly stringent environmental protection requirements, automotive fuel oils have put forward higher requirements for the sulfur content in oil products. Reformed naphtha has the characteristics of no sulfur and high octane number, and is an important blending component for the production of clean gasoline. [0003] The reforming catalyst is a noble metal catalyst, and the content of sulfur and nitrogen in the raw material is required to be less than 0.5 μg / g, and the content of arsenic is less than 1 ng / g. With the...
Claims
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