Alumina carrier having big holes and preparation method

A macroporous alumina, alumina technology, applied in catalyst carrier, chemical instrument and method, chemical/physical process, etc., can solve problems such as unfavorable stability of catalyst activity, achieve improved anti-coking performance, hydrodemetallization High activity, low acid effect

Active Publication Date: 2005-03-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the greater the acid content and the higher the strength of the catalyst carrier, the faster the carbon deposition rate of the catalyst, and the more unfavorable it is to the stability of the catalyst activity.

Method used

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  • Alumina carrier having big holes and preparation method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027] Take by weighing the dry rubber powder (dry basis is 73% that Changling Oil Refinery Catalyst Factory produces, and wherein pseudo-boehmite content is 68 weight %, and gibbsite content is 5 weight %, and remainder is amorphous alumina) 300 grams, 9 grams of fennel powder (product of Lankao Tianjing Rubber Factory in Henan Province) are mixed, then add 360 milliliters of aqueous solution containing 12 grams of ammonium fluoride (product of Tianjin Chemical Reagent No. 3 Factory), and extrude into φ 1. 1 mm trefoil strips, wet strips were dried at 120°C for 4 hours and then calcined at 700°C for 2 hours to obtain carrier Z1. The acid content, fluorine content, specific surface area, accessible pore size, pore distribution and pore volume of Z1 were measured, and the results are shown in Table 1.

[0028] The fluorine content is determined by X-ray fluorescence spectrometry, and the specific surface area, programmable pore size, pore distribution and pore volume are determ...

example 2

[0037] Take by weighing 300 grams of dry rubber powder (with example 1), 12 grams of polyvinyl alcohol (Changling Catalyst Factory) mixes, then add 360 milliliters of solutions containing 18 grams of hydrofluoric acid (Beijing Chemical Plant product), and extrude in twin-screw Extruded on the machine into a Raschig ring strip with an outer diameter of 3.5 mm and an inner diameter of 1.0 mm, the wet strip was dried at 150°C for 2 hours and then calcined at 780°C for 2 hours to obtain carrier Z2. The acid content, fluorine content, specific surface area, probable pore diameter, pore distribution and pore volume of Z2 were measured, and the results are shown in Table 1.

example 3

[0039] Take by weighing aluminum hydroxide powder (dry basis is 74% on a dry basis, wherein pseudo-boehmite content is 82% by weight, gibbsite content is 5% by weight, and surplus is amorphous aluminum oxide) 300 grams produced by Shanxi Aluminum Factory , 9 grams of scallop powder and 9 grams of methyl cellulose are mixed, and then 360 ml of aqueous solution containing 5 grams of ammonium fluoride is added, extruded into a butterfly-shaped strip of φ1.5 mm on a twin-screw extruder, and the wet strip is subjected to 120°C After drying for 4 hours, keep the temperature at 750° C. for 2 hours to obtain carrier Z3. The acid content, fluorine content, specific surface area, probable pore diameter, pore distribution and pore volume of Z3 were measured, and the results are shown in Table 1.

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PUM

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Abstract

A macroreticular alumina carrier contains alumina and halogen and is prepared through mixing hydrated aluminium oxide with pore enlarging agent, shaping and calcining at 600-850 deg.C

Description

technical field [0001] The invention relates to an alumina carrier and a preparation method thereof, more specifically to a macroporous alumina carrier and a preparation method thereof. Background technique [0002] Hydrodemetallization catalysts used for heavy oil, especially vacuum residue with high metal content, are prone to rapid decline and deactivation of catalyst activity due to the deposition of metal impurities such as nickel and vanadium. Catalysts with larger pore volume and larger pore diameter have strong metal and carbon storage capacity, which can slow down the deactivation of the catalyst and prolong the operation period of the catalyst. The pore structure of the catalyst is determined by the carrier that constitutes the catalyst. Therefore, the preparation of a carrier with a larger pore volume and larger pore diameter is an important step in the preparation of residual oil, especially for the preparation of vacuum residue hydrodeme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/04B01J32/00
Inventor 胡大为杨清河朱立刘滨聂红石亚华李大东
Owner CHINA PETROLEUM & CHEM CORP
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