Preparation method for hydrotreatment catalyst

A hydrogenation treatment and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. Unfavorable catalyst comprehensive performance and other issues

Active Publication Date: 2017-12-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the addition of these carbon precursors, the calcination temperature of the carrier in an oxygen-containing atmosphere cannot be too high, otherwise the carbon will be oxidized and lost. Therefore, for some catalysts that require high-temperature treatment of the carrier, this method is not feasible, and too much The addition of carbon black powder will affect the strength of the catalyst, which is not conducive to large-scale application
[0008] In the above-mentioned prior art, the co-precipitation method or additives are added during molding. The former will cause active metals and Si and other additives to enter the bulk phase during the co-precipitation process, and multiple substances are preci

Method used

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  • Preparation method for hydrotreatment catalyst

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preparation example Construction

[0028] According to the preparation method of the carbon-containing modified alumina-based carrier provided by the present invention, the following steps can be specifically adopted:

[0029] 1. The soluble auxiliary agent is prepared into solution A, and the content of the auxiliary agent is 0.1g / 100mL~32g / 100mL in terms of oxide;

[0030] 2. The water-soluble silicone oil is prepared into solution B, wherein the concentration of the water-soluble silicone oil is 0.1g / 100mL~20g / 100mL in terms of silicon oxide;

[0031] 3. Mix the soluble adjuvant and water-soluble silicone oil to prepare solution C, in which the content of the adjuvant is 0.1g / 100mL~16g / 100mL in terms of oxide, and the concentration of water-soluble silicone oil is 0.1g / 100mL~10g / in terms of silica 100mL;

[0032] 4. Use at least one of the following ways to introduce the water-soluble silicone oil and additives onto the alumina-based carrier:

[0033] 1, impregnating the alumina base carrier with solution...

Embodiment 1

[0047] Take 3800 g of macroporous aluminum hydroxide dry rubber powder and 200 g of SB powder, add 160 g of citric acid and 160 g of ssaginella powder, and mix evenly. Then 2900 g of dilute nitric acid aqueous solution was uniformly added, wherein the nitric acid concentration was 2.9 wt %. The material was kneaded for 15 minutes, then rolled for 20 minutes, and extruded with a clover orifice plate with a diameter of 1.7 mm. After drying at 120°C for 4h, it was calcined at 500°C for 4h. The calcined carrier is designated as Z.

[0048] The physicochemical properties of alumina carrier Z are shown in Table 2:

[0049] Table 2 Physicochemical properties of alumina carrier Z

[0050]

Embodiment 2

[0052] Weigh 14.3 g of zirconium nitrate, add an appropriate amount of deionized water to dissolve, make the volume 105 mL, and prepare solution A1; weigh 12.6 g of water-soluble silicone oil A, add an appropriate amount of deionized water to dissolve, make the volume 105 mL, and prepare solution B1; Under stirring, slowly pour 35 mL of B1 solution into 35 mL of A1 solution, and add an appropriate amount of deionized water to make the final volume 78 mL to prepare a C1 solution.

[0053] Take 100 g of alumina carrier Z, spray the solution C1 on the alumina carrier evenly, and after culturing for 10 hours, heat treatment at 110°C for 2h and 240°C for 3h to obtain the modified carrier S1.

[0054] Take 100 g of alumina carrier Z, dilute 35 mL of solution B1 with deionized water to 78 mL, evenly spray it on the carrier Z, maintain for 10 hours, heat treatment at 100 °C for 2 h, and then dilute 35 mL of solution A1 with deionized water to 76 mL, It was evenly sprayed on the carrie...

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Abstract

The invention discloses a preparation method of a hydrotreatment catalyst. The preparation method comprises the following steps: preparing a carbon-containing modified alumina-based carrier; loading the carrier with hydrogenation active metal component by using an impregnation process; and carrying out drying to obtain the hydrotreatment catalyst. A preparation method for the carbon-containing modified alumina-based carrier comprises the following steps: sequentially or simultaneously introducing water-soluble silicon oil, a soluble aid and a carbon precursor into an alumina-based carrier and carrying out heat treatment so as to obtain the carbon-containing modified alumina-based carrier. The method can adjust the distribution of an acid center and a hydrogenation active center to make the acid center and the hydrogenation active center coordinate with each other, thereby improving the comprehensive performance of the hydrotreatment catalyst.

Description

technical field [0001] The present invention relates to a preparation method of a hydrotreating catalyst, in particular to a preparation method suitable for a heavy distillate hydrotreating catalyst. Background technique [0002] Most supported catalysts are prepared by impregnation, such as various hydrogenation catalysts. Alumina is often used as a support material for this type of catalyst. but pure Al 2 O 3 The interaction force between the active metal on the surface and the carrier is large, and it is easy to form inactive species (such as the formation of nickel-aluminum spinel), and it is not easy to be completely sulfurized to form a type II active phase with high hydrogenation activity. At the same time, the acidity of the catalyst surface has a great influence on the activity of the hydrogenation catalyst. The removal of heteroatoms in the raw material requires the catalyst to have hydrogenolysis activity, which occurs at the acid center of the catalyst. Theref...

Claims

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Application Information

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IPC IPC(8): B01J23/755C10G45/08
CPCB01J23/002B01J23/755B01J35/1019B01J35/1042B01J2523/00C10G45/08C10G2300/1044C10G2300/70B01J2523/31B01J2523/41B01J2523/48B01J2523/68B01J2523/847
Inventor 杨占林彭绍忠唐兆吉姜虹王继锋温德荣孙立刚王平
Owner CHINA PETROLEUM & CHEM CORP
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