Inferior heavy oil hydrodemetallization catalyst and preparation method thereof

A technology for hydrodemetallization and low-quality heavy oil, which is applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc. It can solve the problem of reduced carrier strength, unfavorable inner and outer surfaces of particles, etc. problems, to achieve the effect of smooth channels, high demetallization activity and activity stability

Active Publication Date: 2015-05-27
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: adding a small amount of carbon black powder will easily form "ink bottle" holes; adding too much carbon black powder will cause a significant decrease in carrier strength
Although this method can play a role in pore expansion, the carrier pore diameter is uniformly distributed from the outer surface of the particle to the center, which is not conducive to maximizing the effect of the inner and outer surfaces of the particle

Method used

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  • Inferior heavy oil hydrodemetallization catalyst and preparation method thereof
  • Inferior heavy oil hydrodemetallization catalyst and preparation method thereof
  • Inferior heavy oil hydrodemetallization catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of carrier

[0024] Weigh 500 g of pseudo-boehmite dry rubber powder (dry basis content 71.2 wt%) produced by Jiangsu Sanji Chemical Co., Ltd., add 15 g of scallop powder, add 15 g of methyl cellulose, and mix well. 450 g of acetic acid solution with a concentration of 1.0 wt % was added to the aforementioned materials, kneaded to a plastic body, and then extruded into a cylindrical shape with a diameter of 1.4 mm on a front-extrusion single-screw extruder. Dry at 120°C for 3 hours, then place it in a roasting furnace, raise it to 900°C at a rate of 180°C / hour, and roast for 3 hours.

[0025] (2) Handling of the carrier

[0026] Weigh 300 grams of the obtained carrier from (1) and place it in a rotating vessel, spray 250 g of deionized water evenly on the obtained alumina carrier at a speed of 30 mL / min, and spray water to the aforementioned deionized water at a speed of 6.5 g / min. Add glacial acetic acid evenly to deionized water. After spraying to t...

Embodiment 2

[0031] Add 500 g of the aforementioned pseudo-boehmite dry rubber powder, add 15 g of scallop powder, add 25 g of polyvinyl alcohol, and mix well. Add 410 g of acetic acid solution with a concentration of 2.5 wt % into the aforementioned materials, and knead for 45 minutes. Extruded and dried in the same way as in Example 1, and fired at 920°C for 3 hours. 250g of deionized water was evenly sprayed on the obtained alumina carrier at a speed of 30mL / min, and glacial acetic acid was evenly added to the aforementioned deionized water at a speed of 8.0g / min while spraying water. After spraying to the saturated water absorption rate of the carrier, airtight treatment at 70°C for 2.0 hours, and washing 3 times. Dry at 200°C for 3.0 hours. Repeat the above acid treatment process 2 times. Catalyst B was obtained using the same catalyst preparation conditions as in Example 1.

Embodiment 3

[0033] The carrier calcination temperature in Example 1 was changed to 880° C., the adding rate of acetic acid was changed to 5.0 g / min, and other conditions were the same as in Example 1 to obtain catalyst C.

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Abstract

The invention relates to an inferior heavy oil hydrodemetallization catalyst and a preparation method thereof. The catalyst adopts aluminum oxide as the carrier, and takes group VIII and group VIB elements, especially Ni-Mo as the active components, the catalyst pore volume is 0.71-0.85mL/g, the specific surface area is 90-150m<2>/g, the average pore diameter is 19.0-30.0nm, and the average pore diameter gradually increases from the center to the outer surface along the radial direction of the catalyst particles. According to the preparation method of the catalyst, a concentration continuously increasing acid solution is employed to treat molded and roasted carrier particles. The catalyst provided by the invention has large surface aperture, wide pore channel, excellent diffusion performance, high hydrodemetallization activity and activity stability.

Description

technical field [0001] The invention relates to a hydroprocessing catalyst and a preparation method thereof, in particular to an inferior heavy oil hydrodemetallization catalyst and a preparation method thereof. Background technique [0002] Inferior heavy oil such as residual oil contains high metal impurities such as Ni and V, which usually need to be removed by hydrotreating in order to produce clean gasoline, diesel and other oil products and chemical products through subsequent processing (such as catalytic cracking). raw material. Studies have shown that metal impurities in low-quality heavy oil such as residual oil mainly exist in colloids and asphaltene, which have large molecular weight, complex structure, and difficult diffusion. Therefore, the catalyst is required to have an excellent pore structure to facilitate the diffusion of macromolecular reactants. reaction and deposition. [0003] The pore structure of a catalyst has an important impact on its performanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/883C10G45/08
Inventor 程涛赵愉生崔瑞利张春光于双林谭青峰赵元生由慧玲周漪李井泉那美琦余颖龙
Owner PETROCHINA CO LTD
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