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Macroporous alumina carrier and preparation method thereof

A macroporous alumina and alumina technology, applied in catalyst carriers, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problems of uneven distribution of pore channels, dispersion of pore size distribution, insufficient and uneven mixing of materials, etc. The effect of good stability and catalytic performance

Pending Publication Date: 2022-04-22
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the pore expander is added to the solid alumina precursor powder in the form of mechanical mixing, there is a problem of insufficient and uneven material mixing between the pore expander and the alumina precursor. Uneven pore distribution and diffuse pore size distribution

Method used

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  • Macroporous alumina carrier and preparation method thereof
  • Macroporous alumina carrier and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Take 95g deionized water, add 1g Tween-80 to it, stir to make Tween-80 dissolve completely, then add 5g diesel oil to it, continue to stir to make microemulsion solution, then add 100g pseudoboehmous aluminum to the microemulsion solution stone for beating. After continuous beating for 1 hour, the slurry is quickly dried and ground to make alumina powder. Add 3g of scallop powder to the alumina powder, mix evenly, dropwise add a mixed solution consisting of 3g of nitric acid (68wt%), 5g of citric acid and 80g of deionized water and knead, extrude into 1.5mm clover-shaped, 120°C Dry for 2h, then bake at 550°C for 4h to make carrier A.

Embodiment 2

[0033] Get 95g deionized water, add 0.5g Tween-80 to it, stir to make Tween-80 dissolve completely, then add 5g diesel oil to it, continue to stir to make microemulsion solution, then add 100g pseudo thin water to the microemulsion solution Aluminum stone for beating. After continuous beating for 1 hour, the slurry is quickly dried and ground to make alumina powder. Add 3g of scallop powder to the alumina powder, mix evenly, dropwise add a mixed solution consisting of 3g of nitric acid (68wt%), 5g of citric acid and 80g of deionized water and knead, extrude into 1.5mm clover-shaped, 120°C Dry for 2h, then bake at 550°C for 4h to make carrier B.

Embodiment 3

[0035] Take 95g deionized water, add 0.25g Tween-80 to it, stir to make Tween-80 dissolve completely, then add 5g diesel oil to it, continue to stir to make a microemulsion solution, then add 100g pseudo-thin water to the microemulsion solution Aluminum stone for beating. After continuous beating for 1 hour, the slurry is quickly dried and ground to make alumina powder. Add 3g of scallop powder to the alumina powder, mix evenly, dropwise add a mixed solution consisting of 3g of nitric acid (68wt%), 5g of citric acid and 80g of deionized water and knead, extrude into 1.5mm clover-shaped, 120°C Dry for 2h, then bake at 550°C for 4h to make carrier C.

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Abstract

The invention discloses a macroporous alumina carrier and a preparation method thereof, and the catalyst carrier is prepared by the following steps: adding alumina as a matrix into an oil-in-water type oil-water emulsion prepared from deionized water, a pore-forming agent and a pore-forming auxiliary agent for pulping; the micro-emulsion drops in the oil-water emulsion are uniformly dispersed in the aluminum oxide slurry by stirring, and then macropores are formed in the aluminum oxide by quick drying and roasting. The use amount of the pore-forming agent is 1wt%-2wt% of the weight of aluminum oxide, the use amount of the pore-forming auxiliary agent is 0.15 wt%-0.25 wt% of the weight of aluminum oxide, and the macroporous aluminum oxide carrier is suitable for preparing a diesel distillate oil hydrogenation catalyst.

Description

technical field [0001] The invention relates to an alumina carrier and a preparation method thereof, in particular to a macroporous alumina carrier and a preparation method thereof. The carrier is especially suitable for preparing a diesel fraction hydrogenation catalyst in the field of petroleum refining. Background technique [0002] The hydrogenation process is currently the only large-scale industrialized clean diesel production process. The hydrogenation catalyst used in the diesel hydrogenation process usually uses alumina as a carrier. In the carrier preparation process, alumina or modified alumina is mixed with additives , binder, etc., are mixed together by extrusion, drying, and roasting to make a catalyst carrier with a certain pore structure. With the continuous improvement of diesel quality standards, the effective removal of complex structural sulfides and macromolecular polycyclic aromatic hydrocarbons in diesel is the focus of research and development of dies...

Claims

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Application Information

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IPC IPC(8): B01J21/04B01J35/10B01J32/00B01J37/08C04B35/10C04B35/622C04B38/02C10G45/04
CPCB01J21/04B01J37/0009B01J37/0018C04B35/10C04B35/622C04B38/02C10G45/04C04B2235/3218C04B2235/656C04B2235/6567C04B2235/94C04B2235/95C04B2235/963C04B2235/96B01J35/638B01J35/635B01J35/647B01J35/615C04B38/0054
Inventor 温广明马宝利宋金鹤王丹张文成郭金涛徐铁钢徐伟池谭明伟
Owner PETROCHINA CO LTD
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