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Hierarchical pore hydrotreating catalyst and preparation method thereof

A hydrogenation treatment and catalyst technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of lack of multi-level pore structure, low demetallization performance of catalysts, and diffusion of residual oil macromolecules In order to achieve the effect of reducing diffusion resistance, rich pore structure, and good hydrodemetallization performance

Pending Publication Date: 2022-04-12
SINOCHEM QUANZHOU PETROCHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of existing heavy oil hydrotreating catalysts is the lack of multi-level pore structure, and the diffusivity and activity of residual oil macromolecules cannot be well matched.
[0007] The demetallization performance of these catalysts is generally low

Method used

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  • Hierarchical pore hydrotreating catalyst and preparation method thereof
  • Hierarchical pore hydrotreating catalyst and preparation method thereof
  • Hierarchical pore hydrotreating catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 300g of commercial pseudo-boehmite and record it as PA1 (the pore volume is 1.1mL / g, the specific surface area is 300m 2 / g), calcined at 500℃ for 2h in a muffle furnace to obtain the modified PA2-1. Weigh 110g PA1, 38g PA2-1, 44g pseudo-boehmite PB1 (pore volume 1.3mL / g, specific surface area 80m 2 / g, crystal size d(120) is 40nm) and 5g of scallop powder, stir and mix evenly. Add 245mL containing 6.5g / L NiO, 26.5g / L MoO 3 , 6.5g / L P 2 o 5 The Ni-Mo-P solution is kneaded into a plastic body, and then extruded into a four-leaf clover-shaped strip with a diameter of 1.3mm on an extruder. The wet strip was dried at 120°C for 12h, and kept at 500°C in a roasting furnace for 2h to obtain catalyst A1. The pore structure and metal loading of catalyst A1 are shown in Table 1.

Embodiment 2

[0027] Weigh 300g of commercial pseudo-boehmite and record it as PA1 (the pore volume is 1.1mL / g, the specific surface area is 300m 2 / g), calcined at 550°C for 2h in a muffle furnace to obtain the modified PA2-2. Weigh 95g PA1, 35g PA2-2, 58g pseudo-boehmite PB1 (pore volume 1.3mL / g, specific surface area 80m 2 / g, crystal size d(120) is 40nm) and 5g of scallop powder, stir and mix evenly. Add 235mL containing 6.8g / L NiO, 27.6g / L MoO 3 , 6.8g / L P 2 o 5 The Ni-Mo-P solution is kneaded into a plastic body, and then extruded into a four-leaf clover-shaped strip with a diameter of 1.3mm on an extruder. Dry the wet bar at 120°C for 12h, and keep the temperature at 550°C in a roasting furnace for 3h to obtain catalyst A2. The pore structure and metal loading of catalyst A2 are shown in Table 1.

Embodiment 3

[0029] Weigh 300g of commercial pseudo-boehmite and record it as PA1 (the pore volume is 1.1mL / g, the specific surface area is 300m 2 / g), calcined in a muffle furnace at 600°C for 2h to obtain the modified PA2-3. Weigh 103g PA1, 50g PA2-3, 35g pseudoboehmite PB1 (pore volume 1.3mL / g, specific surface area 80m 2 / g, crystal size d(120) is 40nm) and 5g of scallop powder, stir and mix evenly. Add 245mL containing 6.5g / L NiO, 26.5g / L MoO 3 , 6.5g / L P 2 o 5 The Ni-Mo-P solution is kneaded into a plastic body, and then extruded into a four-leaf clover-shaped strip with a diameter of 1.3mm on an extruder. The wet strip was dried at 120°C for 12 hours, and kept in a roasting furnace at 600°C for 3 hours to obtain catalyst A3. The pore structure and metal loading of catalyst A3 are shown in Table 1.

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Abstract

The invention provides a hierarchical pore hydrotreating catalyst and a preparation method thereof, and the preparation method comprises the following steps: mixing an alumina precursor PA1, a modifier PA2 of PA1, an alumina precursor PB1 and an extrusion aid, adding a metal salt aqueous solution containing a hydrogenation active metal component, carrying out mixing kneading and molding, and then carrying out drying and roasting. The hydrotreating catalyst provided by the invention has a unique hierarchical pore structure and abundant pore structures, and can reduce the diffusion resistance of residual oil macromolecules and provide a better reaction place. Compared with the prior art, the catalyst provided by the invention has better hydrodemetallization performance when being used for residual oil hydrotreatment.

Description

technical field [0001] The invention specifically relates to a multi-level porous hydrogenation catalyst and a preparation method thereof. Background technique [0002] With the development of heavy and inferior crude oil worldwide, the increasing demand for fuel oil consumption and the increasingly stringent environmental regulations, the efficient and clean conversion of heavy oil is particularly important. Using hydrotreating technology to convert heavy oil including residual oil into high-quality fuel oil and chemical products will help improve crude oil utilization, reduce environmental pollution, increase light oil yield and improve product quality. [0003] Inferior heavy oil such as residual oil contains a large amount of metals (Fe, Ni, V, etc.), sulfur, nitrogen and other impurities, and the content of residual carbon is high. Different from hydrodesulfurization and denitrogenation of distillate oil, metals such as Fe, Ni, and V will gradually deposit on the catal...

Claims

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Application Information

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IPC IPC(8): B01J27/19B01J35/10C10G45/08
Inventor 徐景东王娇红李慧胜车晓瑞张强徐人威张滨
Owner SINOCHEM QUANZHOU PETROCHEM CO LTD
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