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Preparation method of aluminium oxide carrier

An alumina carrier and alumina technology, applied in catalyst carriers, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as environmental pollution, increased cost of catalyst raw materials, and pollution of the environment, so as to reduce costs and eliminate carriers. The effect of the destruction of the pore structure

Inactive Publication Date: 2005-03-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problems existing in the alumina carrier prepared by the above-mentioned disclosed method are: (1) due to the use of inorganic acid or organic acid as a peptizer, it is easy to damage the pore structure of alumina monohydrate, and also pollute the environment; (2) The cost of the prepared carrier is high
This treatment method not only increases the raw material cost of the catalyst, but also pollutes the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The alumina carrier waste (specific surface 250m 2 / g, pore volume 0.890ml / g, pore distribution: 20nm accounted for 22.5%) ground into powder less than 120 mesh, weighed 400g of powder and high wear-resistant 24g of carbon black powder were mixed, and 300ml of an alkaline solution containing 8g of ammonium carbonate was added thereto. After mixing for 25 minutes. Then add 400g of FLS-2 type aluminum dry glue purchased from Jiangyan Chemical Auxiliary Factory and 300ml of deionized water, knead the material into a plastic body, and extrude it with an F-26 extruder and a 1.0mm cylindrical die. strip. After extruding, it was dried at 130°C for 5 hours, then raised to 800°C at a rate of 280°C / hour in an air atmosphere, and calcined at a constant temperature for 6 hours to obtain alumina carrier A.

Embodiment 2

[0031] Alumina carrier leftovers (specific surface 200m 2 / g, pore volume 0.80ml / g, pore distribution: 20nm accounted for 19%) ground into powder less than 150 mesh, weighed 400g and high wear-resistant carbon black 70 g of powder were mixed, and 350 ml of alkaline solution containing 20 g of ammonium carbonate was added thereto. After mixing for 15 minutes. Then add 600g of FLS-2 type aluminum hydroxide dry rubber powder purchased from Jiangyan Chemical Auxiliary Factory and 500ml of deionized water, knead the material to become a plastic body, and use the F-26 type extruder and a diameter of 1.0mm cylinder Die extrusion. After extruding, dry at 75°C for 3 hours and at 105°C for 6 hours. Then raise the temperature to 900° C. at a rate of 230° C. / hour under an air atmosphere, and calcine at a constant temperature for 1.5 hours to obtain an alumina carrier B.

Embodiment 3

[0033] The alumina carrier waste (specific surface 230m 2 / g, pore volume 0.840ml / g, pore distribution: 20nm accounted for 21%) ground into 250 mesh powder, weighed 200g of powder and high wear-resistant carbon 100 g of black powder were mixed, and 180 ml of an alkaline solution containing 30 g of ammonium carbonate was added thereto. After mixing for 25 minutes. Then add 800g of FLS-2 type aluminum hydroxide dry rubber powder purchased from Jiangyan Chemical Auxiliary Factory and 740ml of deionized water, knead to make the material into a plastic body, use the F-26 type extruder and a diameter of 1.0mm cylinder Die extrusion. After extruding, dry at 60°C for 4 hours and at 90°C for 5 hours. Then raise the temperature to 1000° C. at a rate of 200° C. / hour under an air atmosphere, and bake at a constant temperature for 1 hour to obtain an alumina carrier C.

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Abstract

A process for preparing the alumina carrier of hydrodemetallizing or hydrodesulfurizing caltalyst from the leftover of alumina includes such steps as grinding, mixing with carbon black powder and the alkaline solution containing nitrogen (or ammonium salt), adding aluminium hydroxide powder, kneading, shaping, drying and calcining.

Description

technical field [0001] The invention relates to a method for preparing an alumina carrier, in particular to a method for preparing an alumina carrier used as a catalyst for hydrotreating heavy oil. Background technique [0002] Heavy oil is the most complex part of crude oil, which contains more metals (Fe, Ca, Na, Ni, V, etc.), sulfur, nitrogen and other non-ideal components (colloid, asphaltenes). In the process of heavy oil hydrotreating, these impurities are deposited on the catalyst, causing permanent poisoning of the catalyst, and more seriously, blocking the catalyst bed, resulting in frequent replacement of the catalyst. Therefore, for heavy oil hydrotreating catalysts, it is necessary not only to improve the pore structure of the catalyst, improve its performance, prolong the operation period of the catalyst, but also reduce the cost of the catalyst. A straightforward way to reduce catalyst cost is to reduce catalyst support cost. [0003] U.S. Patent No. 5,215,95...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/04B01J32/00
Inventor 赵愉生刘喜来安晟王欣张雪梅孟雪松
Owner CHINA PETROLEUM & CHEM CORP
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