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Yb molecular sieve and its preparation method and application as well as diesel oil hydrogenation reforming catalyst carrier and its application

A technology of molecular sieve and carrier, which is applied in the field of diesel hydrogenation reforming catalyst carrier, can solve the problems of cracking selectivity, target product yield to be improved, reduction of aromatics content, high price, etc., and achieve good selectivity and high activity of the target product Effect

Active Publication Date: 2017-08-08
BEIJING ENERGY ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] U.S. Patent US4206036 uses titanium oxide as a carrier, and after loading active components, it is used as a hydrorefining catalyst (desulfurization, denitrogenation), but this carrier has low mechanical strength, small specific surface area, and is expensive, so it cannot be used industrially
[0007] U.S. Patent US2006 / 0052235AI introduces a hydrodesulfurization catalyst using mesoporous molecular sieves, such as MCM-41 as a carrier, cobalt and molybdenum as active components, and silicone resin as a binder. The hydrorefining catalyst has a higher Hydrodesulfurization / olefin saturation activity, but poor stability of mesoporous molecular sieves, it is difficult to operate in harsh hydrodesulfurization environment for a long time
[0008] CN1178238A discloses a diesel hydrogenation conversion catalyst, which is composed of a carrier composed of alumina, amorphous silica-alumina and molecular sieves and a hydrogenation active metal loaded on the carrier. The catalyst is suitable for increasing the cetane number of low-quality diesel oil , to reduce the content of aromatics and the hydrogenation process of desulfurization and denitrogenation. However, in the process of hydrogenation upgrading of diesel oil, the cracking selectivity and yield of target products still need to be improved, and deep desulfurization is difficult

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  • Yb molecular sieve and its preparation method and application as well as diesel oil hydrogenation reforming catalyst carrier and its application
  • Yb molecular sieve and its preparation method and application as well as diesel oil hydrogenation reforming catalyst carrier and its application

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preparation example Construction

[0017] As mentioned above, the present invention provides a kind of preparation method of YB molecular sieve, the method comprises:

[0018] (1) after mixing Y-type molecular sieve and β-type molecular sieve, soak in water-containing solvent, separate out solid from soaking material and dry after roasting to obtain the first solid;

[0019] (2) contacting the first solid with the acidic solution, separating the solid from the contacted material and drying to obtain the second solid;

[0020] (3) subjecting the second solid to hydrothermal treatment.

[0021] According to the present invention, preferably in step (1), the weight ratio of the Y-type molecular sieve and the beta-type molecular sieve is 0.1-20:1, preferably 0.4-9:1.

[0022] According to the present invention, preferably in step (1), the soaking conditions include: the temperature is 60-100°C, preferably 70-90°C.

[0023] According to the present invention, preferably in step (1), the soaking conditions further ...

Embodiment 1

[0055] Preparation of YB molecular sieve: Y-type molecular sieve (SiO 2 with Al 2 O 3 The weight ratio is 60, the crystallinity is 100, the average grain size is 0.2μm, the pore volume is 0.35ml / g, and the specific surface area is 500m 2 / g, Na 2 O content is less than 0.05% by weight), beta molecular sieve (SiO 2 with Al 2 O 3 The weight ratio is 80, the crystallinity is 110, the average grain size is 0.4μm, the pore volume is 0.45ml / g, and the specific surface area is 700m 2 / g, Na 2 O content is less than 0.05% by weight) by weight, mixed in a ratio of 9:1, soaked in a 70°C water bath (the liquid-solid weight ratio is 2:1) and stirred for 9 hours, after suction filtration, the filter cake was placed in a 120°C Dry in an oven until there is no free water, and then bake in a muffle furnace at 550°C for 4h;

[0056] 400 g of the calcined solid was added with 4000 ml of 1.2M (1.2mol / L) HCl aqueous solution, stirred and heated to 80°C, stirred at a constant temperature f...

Embodiment 2

[0059] Preparation of YB molecular sieve: Y-type molecular sieve (SiO 2 with Al 2 O 3 The weight ratio is 90, the crystallinity is 120, the average grain size is 0.4μm, the pore volume is 0.55ml / g, and the specific surface area is 800m 2 / g, Na 2 O content is less than 0.05% by weight), beta molecular sieve (SiO 2 with Al 2 O 3 The weight ratio is 50, the crystallinity is 100, the average grain size is 0.2μm, the pore volume is 0.35ml / g, and the specific surface area is 400m 2 / g, Na 2 O content is less than 0.05% by weight) by weight, mix in a ratio of 0.4:1, stir in a water bath at 80°C for 6 hours (the liquid-solid weight ratio is 4:1), and place the filter cake in an oven at 120°C after suction filtration Dry to no free water, and then roast in a muffle furnace at 550 °C;

[0060] 400 g of the calcined solid was added to 4000 ml of 0.5M HCl aqueous solution, stirred and heated to 80°C, stirred at a constant temperature for 2 hours, filtered, washed, and dried at 11...

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Abstract

The invention provides a YB molecular sieve and its preparation method and application. The method comprises: (1) mixing Y-type molecular sieve and β-type molecular sieve and soaking in an aqueous solvent, separating the solid from the soaking material, drying and roasting to obtain the first solid; (2) contacting the first solid with an acid solution, separating the solid from the contacted material and drying to obtain a second solid; (3) subjecting the second solid to hydrothermal treatment. The invention provides a diesel oil hydrogenation reforming catalyst carrier and application thereof. In the present invention, the modified catalyst prepared by using the carrier obtained by YB molecular sieve has the characteristics of high activity, good selectivity of the target product, etc., and the desulfurization rate and denitrification rate can both reach 99%. In the upgrading process of light cycle oil, it can solve the difficult problem of producing ultra-low sulfur diesel (sulfur content is less than 50ppm), and the catalyst can also be used to produce benzene and xylene.

Description

technical field [0001] The present invention relates to a YB molecular sieve and its preparation method and its application in diesel hydrogenation upgrading, as well as a diesel hydrogenation upgrading catalyst carrier containing the aforementioned YB molecular sieve and its application in diesel hydrogenation upgrading. [0002] technical background [0003] Catalytically cracked light cycle oil (LCO), often used as a poor quality blend diesel component in blends with straight-run diesel, or directly as fuel oil. From the perspective of the composition of LCO, the total aromatics content is as high as 80%, and the others are alkanes, naphthenes and alkenes, etc. Among them, naphthalene series bicyclic aromatics account for about 70% of the total aromatics content, and monocyclic aromatics and tricyclic aromatics each account for about 70%. About 15% of the total aromatic content. The sulfur content of LCO is 0.2-1.5wt%, the nitrogen content is 100-750ppm, the cetane number...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/02B01J32/00B01J29/80
Inventor 曲良龙轩丽伟董维正孙作霖
Owner BEIJING ENERGY ENG TECH