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Inferior heavy oil hydrodesulfurization demetalization catalyst and preparation method thereof

A technology for hydrodesulfurization 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 problems of reduced carrier strength and unfavorable inner and outer surfaces of particles , to achieve the effect of unobstructed pores

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 hydrodesulfurization demetalization catalyst and preparation method thereof
  • Inferior heavy oil hydrodesulfurization demetalization catalyst and preparation method thereof
  • Inferior heavy oil hydrodesulfurization demetalization 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 69.8 wt%) produced by Shandong Zibo Xingdu Petrochemical Technology Co., Ltd., add 14 g of Sesame powder, add 15 g of polyethylene glycol, and mix well. Add 415 g of acetic acid solution with a concentration of 3.0 wt % into the aforementioned materials, knead for 35 minutes, and then extrude 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 810°C at a rate of 150°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 5.0 g / min. Add glacial acetic acid evenly to deionized water. Afte...

Embodiment 2

[0030] Add 500 g of the above-mentioned pseudo-boehmite dry rubber powder, add 14 g of safflower powder, add 7.0 g of hydroxypropyl methylcellulose, and mix well. Add 420 g of acetic acid solution with a concentration of 2.5 wt % into the aforementioned materials, and knead for 35 minutes. The same method as in Example 1 was extruded, dried, and calcined at 830° 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 uniformly added to the aforementioned deionized water at a speed of 7.0g / min while spraying water. After spraying to the saturated water absorption rate of the carrier, airtight treatment at 60°C for 2.0 hours, and washing with clean water 3 times. Dry at 200°C for 3.0 hours. Catalyst B was obtained using the same catalyst preparation conditions as in Example 1.

Embodiment 3

[0032] The carrier calcination temperature in Example 1 was changed to 790° C., the adding rate of acetic acid was changed to 2.5 g / min, and other conditions were the same as in Example 1 to obtain catalyst C.

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Abstract

The invention puts forward an inferior heavy oil hydrodesulfurization demetalization catalyst and a preparation method thereof. The catalyst takes aluminum oxide as the carrier, and adopts group VIII and group VIB elements especially Ni-Mo as the active components, the catalyst pore volume is 0.61-0.70mL / g, the specific surface area is 155-200m<2> / g, the average pore diameter is 13.0-18.0nm, 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 hydrodesulfurization and demetalization activity and high activity stability.

Description

technical field [0001] The invention relates to a hydrotreating catalyst and a preparation method thereof, in particular to a hydrodesulfurization and demetallization catalyst for inferior heavy oil and a preparation method thereof. Background technique [0002] Inferior heavy oil such as residual oil contains high sulfur and 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 through subsequent processing (such as catalytic cracking) and chemical raw materials. Inferior heavy oils such as residual oil contain a large amount of colloids and asphaltenes, which have large molecular weight, complex structure, and difficult diffusion. Therefore, the catalyst is required to have an excellent pore structure to improve the impurity removal activity and stability of the catalyst. [0003] The pore structure of a catalyst has an important impact on its performance. For heavy oil hydro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/883C10G45/08
Inventor 赵愉生程涛谭青峰于双林张春光赵元生崔瑞利范建光张志国刘佳澎梁川陈芬芬
Owner PETROCHINA CO LTD
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