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Method for preparing small particles of alumina supporter

A technology of alumina carrier and small particles, applied in catalyst carrier, chemical instrument and method, chemical/physical process, etc., can solve the problems of downstream reaction or equipment influence, increase catalyst consumption, increase catalyst cost, etc., to achieve the preparation process Simple and easy to use, strong anti-wear performance, and the effect of reducing the impact

Active Publication Date: 2013-08-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above methods can prepare low-wear, small-particle catalysts or carriers, but special equipment is required for spheroidization, the preparation process is complicated, and the cost of the catalyst is increased. Moreover, the obtained spherical particles have high wear, increase catalyst consumption, and affect downstream reactions or equipment that adversely affects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] In the preparation process of the catalyst carrier of the present invention, in the described acidic aluminum salt solution, Al 2 o 3 The concentration is 2-10g / 100mL; in the alkaline aluminate aqueous solution, Al 2 o 3 The concentration is 8-30g / 100mL.

[0036] Among the present invention, catalyst carrier specific surface and pore structure adopt low-temperature liquid nitrogen adsorption method to measure; Phase adopts X-ray diffraction analysis; Acid index test method: get a certain amount of aluminum oxide dry glue (with Al 2 o 3 Count) by mass ratio Al 2 o 3 : HNO 3 =1:0.2 After adding concentrated nitric acid with a mass concentration of 65%, the Al in the peptizable part 2 o 3 The percentage of total alumina is the acidity index. Abrasion was determined by the sieving method.

Embodiment 1

[0039] 2L sodium metaaluminate aqueous solution (Al 2 o 3 Concentration is 15g / 100mL) and 3L aqueous solution of aluminum sulfate (Al 2 o 3Concentration is 2g / 100mL) into the container at the high position, the flow meter connected to the bottom flows into the stainless steel container equipped with 6L clean water belt agitator and heating mantle, and heated to 40°C; add sodium metaaluminate solution to make the pH value rises to 9.8, stop adding sodium metaaluminate solution, and stabilize for 10 minutes; pass through aluminum sulfate solution, reduce the pH value to 3, and stabilize for 10 minutes; pass through sodium metaaluminate solution, make the pH value rise to 10. Repeat the swing 3 times. After oscillating, stabilize for 10 minutes, raise the temperature to 130° C., stabilize for 3 hours, filter and separate the mother liquor, and wash. Drying at a temperature of 140°C for 3 hours yielded an alumina dry gel, the acid index of which was measured to be 35%. Then u...

Embodiment 2

[0041] 2L sodium metaaluminate aqueous solution (Al 2 o 3 Concentration is 20g / 100mL) and 3L aqueous solution of aluminum sulfate (Al 2 o 3 Concentration is 8g / 100mL) respectively into the container at the high position, the flow meter connected to the bottom flows into the stainless steel container equipped with 6L clean water with stirrer and heating mantle, and heated to 55°C; add sodium metaaluminate solution to make the pH value rises to 10.8, stop adding sodium metaaluminate solution, and stabilize for 10 minutes; pass through aluminum sulfate solution, make the pH value drop to 3.5, and stabilize for 10 minutes; pass through sodium metaaluminate solution, make the pH value rise to 10.8. Repeat the swing 4 times. After oscillating, the temperature was raised to 160° C. after 10 minutes of stabilization, and was stabilized for 4 hours. The mother liquor was separated by filtration and washed. Drying at a temperature of 100°C for 8 hours to obtain an alumina dry gel, t...

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Abstract

The invention discloses a method for preparing small particles of alumina supporter. The method comprises the following steps of: at a lower temperature, gelatinizing by a pH value swing method; then at a high temperature, stabilizing for a certain time; filtering, washing and drying to obtain alumina dry glue; grinding the alumina dry glue into small particles; and then roasting to obtain the alumina supporter. The alumina supporter with large aperture, large specific surface area and low wear can be prepared by the method disclosed by the invention. The alumina supporter is particularly suitable for being used as a carrier of a hydrotreating catalyst for residual oil of a fluidized bed. By the alumina supporter, not only can the diffusional limitation of macromolecular compounds in the residual oil, such as colloid, asphaltene and the like, in the catalyst be reduced and the hydrogenation activity of the catalyst is improved, but also the wear resistance is strong, the consumption quantity of the catalyst is reduced and the influence on the downstream reaction or equipment is also reduced.

Description

technical field [0001] The invention relates to a preparation method of a small-particle alumina carrier, which is especially suitable for a catalyst carrier in the fluidized bed hydrogenation treatment process of heavy oil and residual oil. technical background [0002] Most of the impurities such as sulfur and metals in crude oil are concentrated in the residual oil, and these impurities will pollute the downstream catalysts in the subsequent processing, so these impurities must be removed by hydrotreating first. [0003] Residue hydrotreating processes mainly include fixed bed, moving bed and ebullating bed. The fluidized bed hydrogenation process is one of the effective means for deep processing of heavy oil due to its strong adaptability to raw materials and flexible processing schemes. [0004] In the process of heavy oil ebullating bed hydroprocessing, raw oil and hydrogen flow upward through the catalyst bed, the bed "boils", and the catalyst particles are in a stat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00
Inventor 刘喜来王刚隋宝宽刘文杰
Owner CHINA PETROLEUM & CHEM CORP