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Preparation method for alumina carrier

A technology of alumina carrier and pseudo-boehmite, which is applied in the direction of catalyst carrier, chemical instrument and method, chemical/physical process, etc., can solve the problem of reducing the utilization rate of the catalyst, and achieve the effect of low wear rate and high strength

Active Publication Date: 2013-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pore diameters of the alumina support are concentrated in the ranges of 6nm-35nm and 100nm-2000nm respectively, and there are many small and medium pores with a pore diameter <35nm, while there are fewer micron-sized pores, resulting in the deposition of Ca and Fe carried by heavy and residual oil on the catalyst. surface, reducing catalyst utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 17 g of pseudo-boehmite dry rubber powder A, pulverize to 100% through 150 mesh, and 150 g of pseudo-boehmite dry rubber powder, pulverize to 100% and pass through 50 mesh, mix the two thoroughly and add a concentration of 2%. (mass fraction) of 160 mL of aqueous nitric acid solution, kneaded into a plastic body, shaped, dried at 100° C. for 4 hours, then heated to 600° C. at 200° C. / hour in a roasting furnace, and kept at a constant temperature for 5 hours to obtain carrier 1.

Embodiment 2

[0031] Weigh 66 g of pseudo-boehmite dry rubber powder A, and pulverize it to 100% through 150 mesh. Pseudo-boehmite dry rubber powder B100g, crushed to 100% through 50 mesh. After the two are thoroughly mixed, 160 mL of nitric acid aqueous solution with a concentration of 3.0% (mass fraction) is added, kneaded to form a plastic body, molded, dried at 120 ° C for 6 hours, and then heated to 700 ° C at 250 ° C / hour in a roasting furnace, At a constant temperature for 4 hours, carrier 2 was obtained.

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Abstract

The invention discloses a preparation method for an alumina carrier. Two kinds of different pseudo-boehmite dry colloid powder are adopted in the method, wherein the first pseudo-boehmite has relatively low crystallization degree and large pore volume and can provide pores with diameter of 30 to 100 nanometers; and the second pseudo-boehmite has relatively high crystallization degree and can provide pores of micron scale, the second pseudo-boehmite represents extremely hard blocks after drying due to high acidic index, and the crushed second pseudo-boehmite can completely pass through a 50-mesh sieve, so that the number of micro-scale pores can be increased, and the strength of the catalyst carrier can be improved. By adjusting the mixing proportion of the two kinds of pseudo-boehmite, the alumina carrier with high strength, high stacking density, large pore volume and low abrasion rate can be prepared. The alumina carrier is particularly suitable to be used as a carrier of heavy oil or residuum hydro-treating protecting agent.

Description

technical field [0001] The invention relates to a preparation method of an alumina carrier, in particular to a preparation method of a heavy oil and residual oil hydrogenation protective agent carrier. Background technique [0002] One of the keys to the hydrogenation technology of heavy and residual oil is to develop a protective agent with excellent performance. Part of metal impurities such as vanadium and nickel can be deposited, so as to achieve the purpose of protecting the downstream catalyst bed. The performance of the protective agent not only depends on the active component, but also has a close relationship with the pore structure. The pore structure of the protectant is mainly determined by the alumina support. Studies have shown that Ca and Fe metal compounds in heavy and residual oil are mainly deposited on the outer surface of the catalyst, and pores with a pore size >1 μm can diffuse into the catalyst for reaction; Reactions were carried out within 100 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00
Inventor 刘喜来王刚隋宝宽刘文杰
Owner CHINA PETROLEUM & CHEM CORP
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