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Method for preparing alumina carrier

An alumina carrier and alumina technology, which is applied in catalyst carriers, chemical instruments and methods, alumina/aluminum hydroxide, etc., can solve the problems affecting the mechanical strength of alumina carriers, large particle size, etc., and achieve volume reduction and improvement. The effect of mechanical strength

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, after molding, some surfactants and hydrocarbon components still remain in the nanometer self-assembled particles, which makes the volume occupied by the particles larger. During the roasting process, although the removal of surfactants and hydrocarbon components It will form large pores and pore volume, although it has a high metal capacity, it will affect the mechanical strength of the alumina support

Method used

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  • Method for preparing alumina carrier
  • Method for preparing alumina carrier
  • Method for preparing alumina carrier

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Under stirring conditions, 375g of aluminum nitrate nonahydrate and 90g of urea were mixed and heated to 100°C, and added to a mixture of 32g of polyisobutylene maleate triethanolamine maleate and 88g of 150HVI neutral oil at the same temperature to form supersolubilizing micelles , and then reacted at 100°C for 3 hours to obtain nano-aluminum hydroxide gel. Wash three times with 200ml of distilled water, and dry at 120°C for 10 hours. Under normal pressure, extract with diesel oil at 70°C, the volume ratio of diesel oil to nano-aluminum hydroxide xerogel is 2:1, the extraction time is 5 hours, and the number of extractions is three times, then filter, and dry at 100°C for 5 hours, Obtain nano aluminum hydroxide AH1.

[0044] 100g of nano-aluminum hydroxide AH1, 5g of dilute nitric acid (mass concentration 17%), and 60g of water were mixed evenly, and mixed evenly on a mixer, and then formed in an extruder, and the pressure was controlled at 10MPa. The molded product ...

Embodiment 2

[0049] Under stirring conditions, 548g of aluminum nitrate nonahydrate and 132g of urea were mixed and heated to 70°C, and added to the mixture of 120g of polyisobutylene maleate triethanolamine maleate and 200g of 150HVI neutral oil at the same temperature to form supersolubilizing micelles , and then reacted at 150° C. for 8 hours to obtain nano-aluminum hydroxide gel. Wash three times with 200ml of distilled water, and dry at 120°C for 10 hours. Under normal pressure, extract with xylene at 70°C, the volume ratio of xylene to nano-aluminum hydroxide xerogel is 3:1, the extraction time is 3 hours, and the number of extractions is three times, then filter, and dry at 100°C for 5 hours, the obtained nano aluminum hydroxide AH2.

[0050] 100g nano-aluminum hydroxide AH2 and binding agent pseudo-boehmite are mixed uniformly in a weight ratio of 9: 1; 2.4g dilute nitric acid (mass concentration 17%), 75g water are mixed uniformly, and then added to nano-aluminum hydroxide and I...

Embodiment 3

[0055] Under stirring conditions, 548g of aluminum nitrate nonahydrate and 170g of urea were mixed and heated to 70°C, and added to a mixture of 25g of polyisobutylene maleate triethanolamine maleate and 95g of 150HVI neutral oil at the same temperature to form supersolubilizing micelles , and then reacted at 150° C. for 8 hours to obtain nano-aluminum hydroxide gel. Wash three times with 200ml of distilled water, and dry at 120°C for 10 hours. Under normal pressure, extract with petroleum ether at 50°C, the volume ratio of petroleum ether to nano-aluminum hydroxide xerogel is 1:1, the extraction time is 8 hours, and the number of extractions is three times, then filter, and dry at 100°C for 5 hours, the obtained nano aluminum hydroxide AH3.

[0056] 100g nanometer aluminum hydroxide AH3 and comparative example 1 DAH1 are mixed uniformly by weight 3: 1; 2.4g dilute nitric acid (mass concentration 17%), 75g water are mixed homogeneously, then molding in extruder, control press...

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Abstract

The invention discloses a method for preparing an alumina carrier. The method comprises the following steps of: drying nanometer aluminum hydroxide gel prepared by a molten salt supersolubility micelle method, extracting by using an organic solvent, drying, and forming to prepare the alumina carrier. In the method, the nanometer aluminum hydroxide gel is extracted by the organic solvent, so that a surfactant and a hydrocarbon component can be removed from the gel, the volume of nanometer self-assembled particles is greatly reduced, the basic form is unchanged, the sizes of pore channels formed in a natural accumulating mode are mainly concentrated in the range of 30 to 100nm, and the proportion of macropores which are formed by the surfactant and the hydrocarbon component in a free mode and have the size of more than 100nm and even more than 1,000nm is small; and the mechanical strength of the carrier obtained after forming can be improved. The alumina carrier can be used in the catalytic reaction of a macromolecular reactant or product, particularly the residue oil hydrotreatment process.

Description

technical field [0001] The invention relates to a method for preparing an alumina carrier, in particular to a method for preparing a macroporous alumina carrier suitable for residual oil hydrogenation treatment. Background technique [0002] With the increasingly heavy and poor quality of petroleum, it brings more and more difficulties to petroleum processing. At the same time, people's awareness of environmental protection is constantly increasing, and environmental protection regulations are becoming more and more stringent. x , SO x And the restrictions on aromatics content are more stringent. [0003] At present, hydroprocessing is still the most important means to produce high-quality, environment-friendly petroleum products. The core of hydroprocessing technology is the catalyst, and the performance of the carrier is the key to preparing a hydroprocessing catalyst with excellent properties. For the heavy components of petroleum (such as VGO, especially residual oil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J21/04B01J35/10C01F7/02
Inventor 王鼎聪王刚杨刚王永林张成陈金汤
Owner CHINA PETROLEUM & CHEM CORP
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