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Hydroisomerization/cracking catalyst, and preparation method and application thereof

A cracking catalyst and isomerization cracking technology, which is applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems such as failure to achieve results, and achieve low freezing point, good pour point depressing effect, diesel oil yield high rate effect

Active Publication Date: 2013-09-25
SYNFUELS CHINA INNER MONGOLIA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, it is hoped that a catalyst has multiple functions of shape-selective cracking and isomerization at the same time, but if a single molecular sieve is used, good results cannot be achieved

Method used

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  • Hydroisomerization/cracking catalyst, and preparation method and application thereof
  • Hydroisomerization/cracking catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1, preparation of hydroisomerization / cracking catalyst Cat-1

[0039](1) Weigh the finely ground ZSM-22 molecular sieve (SiO 2 / Al 2 o 3 The molar ratio is 80, and the specific surface area is 535.6m 2 / g, infrared acidity is 0.26mmol / g, Na 2 O content is 0.02%, pore volume is 0.35mL / g) 4.6g (dry basis) and amorphous silicon aluminum (SiO 2 The mass content is 25%, the pore volume is 1.38ml / g, and the specific surface area is 535.6m 2 / g, the pore volume of the pores between 3 and 15nm accounts for 75% of the total pore volume, and the infrared acidity is 0.68mmol / g) 87.4g (dry basis) are mixed, placed in a kneader and mixed for 30min, and diluted with 3% Prepared with nitric acid solution, kneaded to a paste, extruded into a cylindrical shape, the diameter of the catalyst is 1.4mm. Dry it in an oven at 120°C for 4h, bake it at 600°C for 4h and cool to room temperature to obtain the acidic isomerization cracking carrier.

[0040] (2) Spray 17.55g of co...

Embodiment 2

[0044] Embodiment 2, preparation of hydroisomerization / cracking catalyst Cat-2

[0045] (1) Weigh the finely ground ZSM-22 molecular sieve (SiO 2 / Al 2 o 3 The molar ratio is 92, and the specific surface area is 486.9m 2 / g, infrared acidity is 0.18mmol / g, Na 2 O content is 0.01%, pore volume is 0.29mL / g) 10.8g (dry basis) and amorphous silicon aluminum (SiO 2 The mass content is 35%, the pore volume is 0.98ml / g, and the specific surface area is 490.3m 2 / g, the pore volume of pores between 3 and 15nm accounts for 69% of the total pore volume, and the infrared acidity is 0.57mmol / g) mixed with 61.2g (dry basis), placed in a kneader and mixed for 15min. Prepare it with 3wt% acetic acid solution, knead it until it becomes a paste, extrude it into a clover shape, and the diameter of the catalyst is 1.5mm. Dry it in an oven at 130°C for 4h, roast at 550°C for 4h and cool to room temperature to obtain the acidic isomerization cracking carrier.

[0046] (2) Spray the aqueous ...

Embodiment 3

[0050] Embodiment 3, preparation of hydroisomerization / cracking catalyst Cat-3

[0051] (1) Weigh the finely ground ZSM-22 molecular sieve (SiO 2 / Al 2 o 3 The molar ratio is 111, and the specific surface area is 396.8m 2 / g, infrared acidity is 0.13mmol / g, Na 2 O content is 0.03%, pore volume is 0.26mL / g) 18.5g (dry basis) and amorphous silicon aluminum (SiO 2 The mass content is 50%, the pore volume is 0.58ml / g, and the specific surface area is 384.5m 2 / g, the pore volume of pores between 3 and 15nm accounts for 64% of the total pore volume, and the infrared acidity is 0.50mmol / g) 55.5g (dry basis) mixed, placed in a kneader and mixed for 40min, 5wt% dilute nitric acid The aqueous solution is mixed and kneaded to a paste, extruded into a four-leaf clover shape, and the diameter of the catalyst is 1.7mm. Dry it in an oven at 120°C for 5h, roast at 550°C for 6h and cool to room temperature to obtain the acidic isomerization cracking carrier.

[0052] (2) 16.09g of nick...

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Abstract

The invention discloses a hydroisomerization / cracking catalyst and a preparation method thereof. The catalyst is composed of an acidic isocraking carrier and a metal active component loaded on the acidic isocraking carrier; the acidic isocraking carrier is composed of a ZSM-22 molecular sieve and an amorphous oxide; and the mass ratio of the acidic isocraking carrier to the metal active component (by metal oxide and / or metal element) is 70-99.9:0.1-30. The preparation method of the catalyst comprises the following steps: 1, mixing the amorphous oxide with the ZSM-22 molecular sieve, carrying out adjusting and kneading molding by using an acid solution, and drying and roasting to obtain the acidic isocraking carrier; and 2, dipping the acidic isocraking carrier in an aqueous solution of a soluble salt of the active metal component, and drying and roasting to obtain the catalyst. The catalyst can crack high-melting-point long-chain normal paraffins into lightweight diesel oil during hydroisomerization, generates a small amount of gases and naphtha, and effectively reduces the condensation points of products.

Description

technical field [0001] The invention relates to a hydroisomerization / cracking catalyst and its preparation method and application. Background technique [0002] F-T synthetic heavy diesel oil is mainly composed of straight-chain hydrocarbons, and its freezing point is generally 16-25°C. Its low-temperature characteristics and lubricating properties are poor, and it is not suitable for use in cold regions. Diesel fractions with the same distillation range have very different freezing points due to their different compositions. The freezing point is -36°C when the mass content of the isomer is 80%, so the hydroisomerization of linear hydrocarbons in the diesel fraction is a very effective means to reduce its freezing point. [0003] The hydroisomerization of heavy diesel oil is to use a bifunctional catalyst with a special pore structure to convert long-chain normal paraffins with high melting point in heavy diesel oil into single side chain isoparaffins with lower melting po...

Claims

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Application Information

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IPC IPC(8): B01J29/76B01J29/78C10G49/08
Inventor 范立闯卢银花刘飞鹏郝坤陶智超杨勇李永旺
Owner SYNFUELS CHINA INNER MONGOLIA CO LTD
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