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Hydrogenation pretreatment catalyst for inferior wax oil, preparation method therefor, and hydrogenation pretreatment method

A technology for hydrogenation pretreatment and low-quality wax oil, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. Catalyst activity, difficulty in diffusion removal, etc., to achieve the effect of simple modification method, weakened interaction, and significant technical effect

Active Publication Date: 2016-07-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Chinese patent CN1206037A uses physical pore-enlarging agent and chemical pore-enlarging agent to carry out carrier pore expansion, and its negative effect (disadvantage) is relatively obvious, (1) the amount of pore-enlarging agent used is relatively large; (2) channel is easy to collapse; (3) specific surface area limited increase
The pore volume of the catalyst carrier prepared by it is 0.80~1.20ml / g (mercury intrusion method), but its specific surface area is 110~200m 2 / g, far lower than the 300m of the present invention 2 / g; its possible pore diameter is 15-20nm, the pore diameter range is narrow, and it lacks a reasonable pore size distribution. It is difficult to diffuse and remove macromolecular impurities such as polycyclic aromatic hydrocarbons and colloids, and it is easy to block the pores and generate coke on the surface of the catalyst. carbon, reducing catalyst activity

Method used

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  • Hydrogenation pretreatment catalyst for inferior wax oil, preparation method therefor, and hydrogenation pretreatment method
  • Hydrogenation pretreatment catalyst for inferior wax oil, preparation method therefor, and hydrogenation pretreatment method
  • Hydrogenation pretreatment catalyst for inferior wax oil, preparation method therefor, and hydrogenation pretreatment method

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preparation example Construction

[0052] The present invention also provides a kind of preparation method of above-mentioned inferior wax oil hydrogenation pretreatment catalyst, comprises the steps:

[0053] 1) adding pseudo-boehmite with a pore diameter of ≤20 nm to deionized water, stirring and adding dropwise peptizing acid with a weight concentration of 4.0 to 8.0% until the pseudo-boehmite is completely dissolved;

[0054] 2) adding phosphorus-containing polysaccharide compound additives, and stirring to obtain an alumina solution;

[0055] 3) kneading the alumina solution and pseudo-boehmite with a pore diameter ≥ 20 nm until it becomes a plastic body, then extruding the plastic body and drying and roasting to obtain a modified alumina carrier;

[0056] 4) impregnating the modified alumina support with a solution containing VIB group metal components and VIII group metal components, and then drying and calcining it.

[0057] Thus, the pseudo-boehmite is dissolved by peptizing acid, the phosphorus-conta...

Embodiment a

[0073] A low-quality wax oil hydrogenation pretreatment catalyst, comprising: modified alumina carrier, VIB group metal component molybdenum and VIII group metal component nickel (metal component exists in the form of oxide in the catalyst); by weight of catalyst Based on 100%, the metal component of group VIB is 20.0% by weight of oxide, the metal component of group VIII is 1.0% by weight of oxide, and the balance is modified alumina carrier.

[0074] The pore volume of the modified alumina support is 0.60ml / g; in the modified alumina support, the primary pores with a pore diameter ≥ 20nm account for 25% of the total pore volume, and the secondary pores with a pore diameter of 10-20nm account for the total pore volume 25% of.

[0075] The preparation method of the inferior wax oil hydrogenation pretreatment catalyst of the present embodiment comprises the steps:

[0076] 1) adding pseudo-boehmite with a pore diameter of ≤20 nm to deionized water, stirring and adding dropwise...

Embodiment b

[0083] A low-quality wax oil hydrogenation pretreatment catalyst, including: modified alumina carrier, VIB group metal component tungsten and VIII group metal component cobalt (metal component exists in the form of oxide in the catalyst); by weight of catalyst Based on 100%, the metal component of group VIB is 30.0% by weight of oxide, the metal component of group VIII is 10.0% by weight of oxide, and the rest is modified alumina carrier.

[0084] The pore volume of the modified alumina support is 1.10ml / g. In the modified alumina support, the primary pores with a pore diameter ≥ 20nm account for 40% of the total pore volume, and the secondary pores with a pore diameter of 10-20nm account for the entire pore volume. 40% of.

[0085] The preparation method of the inferior wax oil hydrogenation pretreatment catalyst of the present embodiment comprises the steps:

[0086] 1) Add pseudo-boehmite with a pore diameter of ≤20 nm to deionized water, stir and add dropwise peptizing ac...

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Abstract

The invention discloses a hydrogenation pretreatment catalyst for inferior wax oil, a preparation method therefor, and a hydrogenation pretreatment method. The catalyst includes, on the basis of the catalyst weight being 100%, 20.0-30.0 wt% of a VIB group metal component on the basis of oxide, 1.0-10.0 wt% of a VIII group metal component on the basis of oxide, and the balanced being a modified alumina carrier. The catalyst improves hydrogenation reaction activity of the hydrogenation pretreatment for catalytic cracking raw materials, and reduces the stringency of operation on a catalytic cracking apparatus.

Description

technical field [0001] The invention relates to a method for treating inferior wax oil, in particular to a method for performing deep hydrogenation pretreatment on catalytic cracking raw materials. Background technique [0002] As my country's environmental protection regulations become increasingly stringent, the quality requirements for petroleum products, especially light petroleum products such as gasoline and diesel, are also becoming higher and higher. But in contrast, the processing volume of inferior wax oil is also increasing year by year. Catalytic cracking (FCC) is one of the important methods of petroleum secondary processing. At present, FCC gasoline accounts for almost 80% of the total gasoline blending in my country, and FCC diesel accounts for nearly 1 / 3 of the total diesel blending. Therefore, how to effectively improve the quality of catalytic cracking raw materials, reduce the sulfur content in the increasing FCC petroleum products, and produce clean fuel...

Claims

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Application Information

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IPC IPC(8): B01J23/883B01J23/882C10G45/08
Inventor 殷北冰马守涛王刚葛冬梅吴显军于春梅孙发民郭金涛张文成王晓峰邴淑秋夏恩冬孟祥彬李凤铉董春明李瑞峰靳丽丽谢方明陆雪峰刘丽莹
Owner PETROCHINA CO LTD