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Residual oil hydrotreating method

A technology of hydrogenation treatment and treatment method, which is applied in the field of residual oil hydrogenation, can solve the problems such as iron and calcium impurities that cannot be solved, and achieve the effect of high demetallization activity

Inactive Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can adjust the distribution of the removed iron and calcium on the catalyst to a certain extent, but it still cannot solve the problem that iron and calcium impurities are easily deposited on the outer surface of the catalyst, causing the pressure drop to increase too fast, thereby affecting the operating cycle of the device. question

Method used

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  • Residual oil hydrotreating method

Examples

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preparation example Construction

[0055] In the preparation method of the hydrotreating catalyst M of the present invention, the first metal oxide is preferably introduced into the carrier, and the first metal source (nickel source) can be introduced in step (1) and / or step (2), and the preferred introduction method is specific The method is as follows: adding a nickel source to the material obtained in step (1) and dissolving it in the material. The nickel source can be a soluble nickel salt, wherein the soluble nickel salt can be one or more of nickel nitrate, nickel sulfate, nickel chloride, preferably nickel nitrate.

[0056] In the preparation method of the hydrotreating catalyst M of the present invention, the silicon source described in step (1) is one or more of water glass and silica sol, wherein the mass content of silicon in terms of silicon oxide is 20% to 40% , preferably 25% ~ 35%; the acid peptizer is one or more of nitric acid, formic acid, acetic acid, citric acid, preferably nitric acid, the ...

Embodiment 1

[0073] Take by weighing silicon oxide content and be that 400g of water glass of 30wt% is added in the beaker, start stirring device, slowly add mass concentration in beaker and be the nitric acid solution 150g of 62%, add nickel nitrate again, the pH of water glass solution in the beaker after stirring and dissolving value is 2.0, then add 385.3g pseudo-boehmite (the properties are as follows: pore volume 1.05mL / g, specific surface area is 306m 2 / g, dry basis is 70wt%), control the molar ratio of nickel oxide and aluminum oxide in the carrier to 0.06:1, stir well and then add curing agent urea 35g, after the urea is completely dissolved, add deionized water to make the material in the beaker It is a paste with a certain fluidity, and the solid content is 33% based on silica and alumina.

[0074] The above paste mass is pressed into two identical hemispheres with spherical cavities. Wherein, a guide mold is placed in a hemisphere, and the guide mold is made of wood. The gui...

Embodiment 2

[0079] The preparation process was as in Example 1, except that the amount of nickel nitrate was increased, and the molar ratio of nickel oxide and alumina in the carrier was controlled to be 0.10:1. The properties of the prepared catalyst carrier B and catalyst M2 are shown in Table 1.

[0080] Wherein, the diameter of the obtained catalyst carrier B is 8 mm, the number of conical channels is 40, the height of the conical channels is 3.5 mm, the angle of the apex angle of the conical channels is 15 degrees, and the bottom surface area of ​​the conical channels is the surface area of ​​a sphere 0.43% of , the total area of ​​the conical base is 17% of the surface area of ​​the sphere.

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Abstract

The invention discloses a residual oil hydrotreating method which comprises the following steps: enabling a mixed residual oil raw material to sequentially pass through an up-flow reactor and a down-flow fixed bed reactor which are arranged in series under an operation condition of hydrotreating to obtain a hydrogenation product, wherein the up-flow reactor is at least provided with a hydrotreating catalyst MA bed layer, at least a hydrotreating catalyst MB bed layer and a hydrodesulfurization catalyst bed layer are arranged in the down-flow fixed bed reactor, and the hydrotreating catalyst MAand the hydrotreating catalyst MB are respectively and independently selected from a hydrotreating catalyst M, a carrier of the hydrotreating catalyst M is a sphere, the outer surface of the carrieris provided with a plurality of large pore channels which are not communicated with one another, and the sectional areas of the large pore channels are gradually reduced from outside to inside along the radial direction. The method provided by the invention is suitable for treating residual oil with high iron and calcium impurity content, and can effectively remove and attach iron and / or calcium impurities; catalyst overall activity is high; and device operation period can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of residual oil hydrogenation, in particular to a method for hydrogenation treatment of heavy and low-quality residual oil with high content of iron and calcium impurities. Background technique [0002] As crude oil becomes heavier and worse, more and more heavy oil and residual oil need to be processed. The processing of heavy oil and residual oil not only needs to be cracked into products with low boiling points, such as naphtha, middle distillate oil and vacuum gas oil, but also to increase their hydrogen-carbon ratio, which requires decarbonization or Hydrogenation method to achieve. Among them, the decarbonization process includes coking, solvent deasphalting, heavy oil catalytic cracking, etc.; the hydrogenation process includes hydrocracking, hydrofining, hydrotreating, etc. The hydrogenation process can not only hydrogenate and convert residual oil, improve the yield of liquid products, but also re...

Claims

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Application Information

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IPC IPC(8): C10G45/06C10G65/04B01J8/04
CPCC10G45/06C10G65/04B01J8/0449B01J8/0492C10G2300/1077C10G2300/107C10G2300/205C10G2300/206C10G2300/202C10G2300/4006
Inventor 耿新国刘铁斌翁延博李洪广金建辉隋宝宽
Owner CHINA PETROLEUM & CHEM CORP
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