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Process of preparing alumina carrier

An alumina carrier, acid aluminum technology, applied in chemical instruments and methods, alumina/aluminum hydroxide, chemical/physical processes, etc., can solve problems such as inappropriateness, and achieve the effect of simple preparation process

Active Publication Date: 2007-12-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The neutralization and aging are carried out under the same conditions, and the pores of the prepared catalyst support are mainly concentrated in the range of 7-12nm, which is not suitable as a catalyst support for heavy distillate oil, especially residual oil hydrotreating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 2L sodium metaaluminate aqueous solution (Al 2 o 3 Concentration is 15g / 100ml) and 3L aluminum sulfate aqueous solution (Al 2 o 3 The concentration is 4g / 100ml) into the container at the high position, and the flowmeter connected to the bottom flows into the stainless steel container with a stirrer and a heating jacket equipped with 6L of clean water, and is heated to 70°C; while stirring, add aluminum sulfate Solution, reduce the pH value of the slurry to 3.5, stabilize for 5 minutes, add the two materials into the stainless steel tank at a certain speed at the same time, keep the pH at 7.2, and neutralize for 15 minutes. After neutralizing for a period of time, stop adding the aluminum sulfate solution, so that the pH value rises to 9, stop adding the sodium metaaluminate solution, and stabilize for a period of time; pass through the aluminum sulfate solution, reduce the pH value to 3, and stabilize for a period of time; Sodium metaaluminate solution to raise the p...

Embodiment 2

[0042] Compared with Example 1, the process of changing the pH value of the shaking solution from 9 to 3 and then to 9 was repeated twice, and the amount of other materials and operating conditions were the same as in Example 1 to obtain Sample 2.

Embodiment 3

[0044] Compared with Example 1, the aging temperature was increased to 120° C., and the amount of other materials and operating conditions were the same as in Example 1, and Sample 3 was obtained.

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PUM

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Abstract

The present invention relates to process of preparing alumina carrier. The process includes the steps of: neutralizing acid aluminum salt and basic aluminate, ageing, filtering, washing, forming, drying and roasting to obtain the alumina carrier. The ageing is completed in the conditions of temperature higher than the neutralizing temperature and pH value higher than the neutralizing pH value. The process is simple, and the prepared alumina carrier has great pore size and great pore volume, and may be used in heavy oil and residual oil hydrogenating catalyst, especially residual oil hydrodemetalizing catalyst and residual oil desulfurizing catalyst.

Description

technical field [0001] The invention relates to a method for preparing an alumina carrier or an alumina carrier containing a small amount of silicon oxide (boron trioxide or phosphorus pentoxide). Background technique [0002] Catalyst support properties such as surface area and pore size play an important role in the stability of catalyst activity. For heavy distillate oil, especially residual oil, the content of metal impurities (such as Ni, V, etc.) is high. If the pore size of the catalyst carrier is small (less than 15nm), the pore size of the catalyst will be small, resulting in the deposition of metal impurities in the heavy distillate oil, especially the residue, near the catalyst orifice, blocking the catalyst orifice, and reducing the catalyst activity and stability. reduce. If the average pore size of the catalyst carrier is too large, the prepared catalyst will have low strength and high attrition. Therefore, the suitable average pore diameter of heavy distill...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/04B01J21/12B01J27/14B01J21/02C10G45/04C01F7/02
Inventor 隋宝宽赵愉生刘喜来张雪梅
Owner CHINA PETROLEUM & CHEM CORP
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