A kind of inferior heavy oil hydrogenation desulfurization catalyst and preparation method thereof

A technology for hydrodesulfurization and low-quality heavy oil, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of reduced carrier strength, unfavorable inner and outer surfaces of particles, etc., and achieves smooth pores and desulfurization activity. and high stability

Active Publication Date: 2017-08-04
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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  • A kind of inferior heavy oil hydrogenation desulfurization catalyst and preparation method thereof
  • A kind of inferior heavy oil hydrogenation desulfurization catalyst and preparation method thereof
  • A kind of inferior heavy oil hydrogenation desulfurization catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of carrier

[0024] Weigh 500 g of macroporous pseudo-boehmite dry rubber powder (dry basis content 71.5 wt%) produced by Yantai Henghui Chemical Co., Ltd., add 14 g of celadon powder, and mix evenly. Add 390 g of acetic acid solution with a concentration of 4.0 wt % into the aforementioned materials, knead it into a plastic body, and then extrude it into a cylinder with a diameter of 1.4 mm on a front-extrusion single-screw extruder. Dry at 120°C for 3.0 hours, then put it into a roasting furnace, raise it to 650°C at a rate of 180°C / hour, and keep the temperature constant for 3 hours.

[0025] (2) Handling of the carrier

[0026] Weigh 300 grams of the carrier obtained in (1) and place it in a rotating vessel, spray 250 g of deionized water on the carrier evenly at a speed of 30 mL / min, and spray water evenly on the aforementioned deionized water at a speed of 3.0 g / min. Add acetic acid. After spraying to the saturated water absorption rate of the c...

Embodiment 2

[0030] Weigh 500 g of the above-mentioned pseudo-boehmite dry rubber powder, add 14 g of safflower powder, and mix evenly. Concentration is that the acetic acid solution 400g of 3.5wt% is added in the aforementioned material, kneading becomes plastic body. Extruded, dried and roasted in the same manner as in Example 1. 250g of deionized water was evenly sprayed on the obtained alumina carrier at a speed of 30mL / min, and acetic acid was uniformly added to the aforementioned deionized water at a speed of 4.0g / min while spraying water. After spraying to the saturated water absorption rate of the carrier, airtight treatment at 60°C for 3.0 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] Change the adding speed of acetic acid into 2.5g / min among the embodiment 1, other conditions are all identical with embodiment 1, obtain catalyst C.

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Abstract

The invention relates to an inferior heavy oil hydrodesulfurization 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 0.45-0.60cm<3> / g, the specific surface area is 205-260m<2> / g, the average pore diameter is 7.0-12.0nm, 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 activity and activity stability.

Description

technical field [0001] The invention relates to a hydrotreating catalyst and a preparation method thereof, in particular to an inferior heavy oil hydrodesulfurization catalyst and a preparation method thereof. Background technique [0002] Inferior heavy oils such as coking wax oil and residual oil have high impurities, and usually need to be hydrotreated (such as residual oil hydrogenation) to remove most of the impurities such as sulfur, so that they can be produced through subsequent processing (such as catalytic cracking). Clean gasoline, diesel and other oil products 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/883B01J37/00C10G45/08
Inventor 赵愉生程涛赵元生于双林张春光崔瑞利谭青峰由慧玲周志远王燕姚远王飞
Owner PETROCHINA CO LTD
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