Method for preparing alumina supporter

An alumina carrier and pseudo-boehmite technology, which is applied in catalyst carriers, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of high cost, complicated process of aluminum dry glue, low product yield and the like, Achieve the effect of low wear rate, low preparation cost and high strength

Inactive Publication Date: 2004-04-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Corrosive and toxic substances such as hydrochloric acid and ammonia water are used in the preparation process of the dry rubber powder. Hydrochloric acid is very corrosive to equipment. In the washing liquid, NH + 4 The content is extremely high, and the water pollution is quite severe; this method uses multiple beating and washing, resulting in low product yield and large water consumption, and the chloride ion content in the filter cake is about 1%.
The process of alu

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] The preparation process of several pseudo-boehmite used in the experiment is as follows:

[0030] Aluminum sulfate solution and sodium metaaluminate solution (concentration in terms of alumina is 26g / 100ml), and flow into 100 liters of stirred tank, adjust the pH value in the tank to 7.5, keep the temperature and pH value constant, 45 minutes Finally, stop feeding the aluminum sulfate solution, adjust the pH value in the kettle to 10.0 with sodium metaaluminate solution; then pump the slurry into a washable plate and frame filter press, filter the mother liquor to fill the filter cake with the plate and frame, and then use Wash the pseudo-boehmite filter cake with industrial purified water to remove impurity ions; finally, place the filter cake in an oven at 115°C for 20 hours to dry to obtain B-1 pseudo-boehmite dry rubber powder.

[0031] Aluminum sulfate solution and sodium metaaluminate solution (concentration in terms of alumina is 19g / 100ml), and flow into 100 lit...

Embodiment 1

[0036] Weigh 142.8g of pseudo-boehmite A dry rubber powder, 571.2g of pseudo-boehmite B-1 dry rubber powder, add 820ml of 1.5m% nitric acid aqueous solution and 40g of glacial acetic acid, stir to form a slurry, and form it in the oil ammonia column Drop the ball on the device, dry the wet gel ball at 100°C for 4 hours, and then heat it up to 1000°C in a roasting furnace at 200°C / hour and keep the temperature constant for 2 hours to obtain the finished product.

Embodiment 2

[0038] Calcination temperature is 600 ℃, and others are described in embodiment 1.

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PUM

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Abstract

The invention discloses a manufacturing method for aluminium dioxide, blends two kinds of different thin water aluminium wafer powder evenly, and then carries on dissolving and forming, drying, baking and gets the aluminum oxide. The first kind of thin water aluminum mine has a hole capacity of 0.50ml/g~0.80ml/g, the proportion accounts for 5w%~50w% of Al2O3 . the hole capacity of the second aluminum mine is about 0.85ml/g ~1.50ml/g. There has no contamination by using the method; the diameter of the carrier is in the range of 6nm~35nm and 100nm~2000nm; the carrier can be used as carrier of protection agent in heavy oil producing, metal eliminating catalyst and so on.

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 for a heavy oil hydrogenation protection agent, a demetallization catalyst and a diffusion-controlled bimodal pore structure catalyst. Background technique [0002] At present, the preparation of hydrogenation protection agent and demetallization catalyst and the reaction process of diffusion control use the bimodal pore structure alumina with large pore volume and large pore size as the carrier, so that it has a large capacity for the migration of metal oxide molecules. Pores, which in turn have small pores that provide catalysis. For example, the preparation methods of alumina introduced in CN1129606A, CN1103009A, etc. all use different alumina dry glue as raw materials, the large pores are obtained by adding various pore-forming agents, and the small pores are determined by the properties of the precursors of alumina. The d...

Claims

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Application Information

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IPC IPC(8): B01J32/00C10G45/04
Inventor 王志武赵愉生王欣孟雪松刘喜来
Owner CHINA PETROLEUM & CHEM CORP
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