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Preparation method of nanometer silicon hydroxide-aluminum hydroxide powder

A technology of aluminum hydroxide and silicon hydroxide, which is applied in chemical instruments and methods, catalyst carriers, catalysts for physical/chemical processes, etc., to achieve the effect of facilitating uniform distribution, increasing the amount of B acid, and improving pore structure

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

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Problems solved by technology

[0009] CN1597093A adopts uniform co-precipitation method, adding sodium silicate solution to sodium aluminate solution, passing CO 2 Gas neutralization for precipitation to obtain amorphous silica-alumina with a maximum pore volume of 1.2ml / g and an average pore diameter of less than 10nm. This material is not suitable for residual oil macromolecular catalysis

Method used

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  • Preparation method of nanometer silicon hydroxide-aluminum hydroxide powder
  • Preparation method of nanometer silicon hydroxide-aluminum hydroxide powder
  • Preparation method of nanometer silicon hydroxide-aluminum hydroxide powder

Examples

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Embodiment 1

[0041] Under stirring condition, heating dehydrates in the water glass of 80g, when detaching to the water glass of 55g weight, add in the mixture of 35g polyisobutylene triethanolamine maleate and 148g of 150HVI neutral oil that stir under the condition of 100 ℃, Formation of hypersolubilized micelles. 750g of aluminum nitrate nonahydrate and 130g of urea were mixed and heated to 100°C, then added dropwise to the above-mentioned supersolubilized colloid, mixed uniformly, and then reacted at 130°C for 10 hours to obtain nanometer silicon hydroxide-aluminum hydroxide gel. Wash with 200ml of distilled water three times, and dry at 120°C for 8 hours to obtain nano silicon hydroxide-aluminum hydroxide SAH1.

Embodiment 2

[0043] Nanometer silicon hydroxide-aluminum hydroxide SAH1 was extracted with petroleum ether for 3 hours at a temperature of 80°C, wherein the volume ratio of petroleum ether to nanometer silicon hydroxide-aluminum hydroxide SAH1 was 2:1, and the extraction times were 2 times, and then Dry at 100° C. for 6 hours to obtain nano silicon hydroxide-aluminum hydroxide SAH2.

Embodiment 3

[0045] Mix nano silicon hydroxide-aluminum hydroxide 104g SAH1 with 6g dilute nitric acid (mass concentration 17%), 60g water and 10g ethanol, mix uniformly on a mixer, and then shape it in an extruder, controlling the pressure at 10MPa. The molded product was dried at 100°C for 10 hours, calcined at 240°C for 3 hours, and calcined at 850°C for 4 hours, wherein the heating rate was 5°C / min, to obtain the silica-alumina composite carrier SA1 of the present invention, Appearance see figure 2 , pore distribution see image 3 .

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Abstract

The invention discloses a preparation method of nanometer silicon hydroxide-aluminum hydroxide powder. The method comprises the following steps: 1, adding a silicon oxide precursor sodium silicate or water glass to a mixture of a hydrocarbon component and a surfactant to form a micelle; and 2, dropping a molten aluminum salt and molten urea. The method of the invention is in favor of the uniform distribution of silicon oxide in amunia, so the pore structure of the nanometer silicon hydroxide-aluminum hydroxide powder which is used as a carrier is improved, and the B acid amount is improved. The silicon hydroxide-aluminum hydroxide powder of the invention, which can be applied to the preparation of catalytic carriers containing macromolecular reactants or products, is especially suitable for residual oil hydrocracking reactions.

Description

technical field [0001] The invention relates to a method for preparing a silicon hydroxide-aluminum hydroxide powder, in particular to a method for preparing a highly active nanometer silicon hydroxide-aluminum hydroxide powder used for a catalyst carrier through which macromolecules can permeate and diffuse. Background technique [0002] With the continuous heaviness of crude oil and the continuous consumption and depletion of petroleum, it is worth considering whether the combined process of hydrorefining and catalytic cracking of residual oil is reasonable. The precious petroleum resources are processed by catalytic cracking technology, and about 7wt% of Carbon is burned, resulting in a great waste of crude oil resources. Combining hydrofining and hydrocracking is the best process combination to save precious petroleum resources, but the development of catalysts will be a very big challenge. Existing catalytic materials do not have enough channels to diffuse the asphalte...

Claims

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Application Information

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IPC IPC(8): B01J21/12B01J32/00B01J35/02C10G45/04
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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