Spherical alumina carrier and preparation method thereof

A spherical alumina, carrier technology, applied in catalyst carriers, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of raw material powder pore volume and specific surface area damage, unfavorable human health, low strength and brittleness, etc. To achieve the effect of easy control of particle size, short time-consuming and simple operation

Active Publication Date: 2017-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the disadvantages of low strength and fragility of the alumina carrier prepared in the prior art, pollution to the environment, adverse to human health, and serious damage to the pore volume and specific surface area of ​​the raw material powder, and to provide a A kind of high-strength spherical alumina carrier and preparation method thereof

Method used

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  • Spherical alumina carrier and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0040] This example is used to illustrate the spherical alumina carrier prepared by the method of the present invention

[0041] Raw material preparation: weighing pore volume is 0.85cm 3 11kg of the first raw material powder pseudo-boehmite / g, the polymer compound binder is dissolved in 14L of water at a temperature of 40°C to form an aqueous solution of the binder; wherein, the addition of the binder is 0.01% by weight of the first raw material powder pseudo-boehmite on a dry basis, and the total volume of the aqueous solution of the binder is 1 time of the first raw material powder pseudo-boehmite on a dry basis;

[0042] Then, the first raw material powder pseudo-boehmite and the aqueous solution of the binder are mixed and granulated in a mixing granulator, wherein the mixing and granulating process includes the first mixing process and the second mixing process carried out in sequence, First, in the first mixing process, the rotating speed of the mixing tool is 1500 rpm...

Embodiment 2

[0046] This example is used to illustrate the spherical alumina carrier prepared by the method of the present invention

[0047] Raw material preparation: weighing pore volume is 0.95cm 3 30kg of the first raw material powder pseudo-boehmite / g, the polymer compound binder is dissolved in 18L water at a temperature of 40°C to form an aqueous solution of the binder; wherein, the addition of the binder is 2.0% by weight of the dry weight of the first raw material powder pseudo-boehmite, and the total volume of the aqueous solution of the binder is 3 times the dry weight of the first raw material powder pseudo-boehmite;

[0048] Then, the aqueous solution of the first raw material powder pseudo-boehmite and the binder is mixed and granulated in a mixing granulator, wherein the mixing and granulating process includes the first mixing process and the second mixing process carried out in sequence, first In the first mixing process, the rotating speed of the mixing tool is 2000 rpm, ...

Embodiment 3

[0052] This example is used to illustrate the spherical alumina carrier prepared by the method of the present invention

[0053] Raw material preparation: weighing pore volume is 0.92cm 3 11kg of the first raw material powder pseudo-boehmite / g, the polymer compound binder is dissolved in 16L of water at a temperature of 40°C to form an aqueous solution of the binder; wherein, the addition of the binder is 0.5% by weight of the dry weight of the first raw material powder pseudo-boehmite, and the total volume of the aqueous solution of the binder is twice the dry weight of the first raw material powder pseudo-boehmite;

[0054] Then, the aqueous solution of the first raw material powder pseudo-boehmite and the binder is mixed and granulated in a mixing granulator, wherein the mixing and granulating process includes the first mixing process and the second mixing process carried out in sequence, first In the first mixing process, the rotating speed of the mixing tool is 1800 rpm,...

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Abstract

The invention discloses a spherical alumina carrier and a preparation method thereof. Specifically, the method comprises the steps of: (1) subjecting first raw material powder and a binder to mixing granulation to form wet balls with a particle size of 0.1-3mm; (2) contacting second raw material powder with the wet balls formed in step (1), and then conducting pre-drying, drying, sieving and roasting in order; wherein, the first raw material powder and the second raw material powder are the same or different, and are pseudo-boehmite or a mixture of pseudo-boehmite and boehmite respectively. The spherical alumina carrier prepared by the method provided by the invention has significantly increased strength, the particles size of the formed balls is easily controllable, and the time is short. Also, the preparation method provided by the invention is easy to operate, as strong acid or other peptizers are not added in the granulation process, a large pore volume carrier can be obtained. And the method provided by the invention is carried out in a mixing granulator, the work environment is friendly.

Description

technical field [0001] The invention relates to a spherical alumina carrier and a preparation method thereof, in particular to a high-strength spherical alumina carrier and a preparation method thereof. Background technique [0002] In recent years, while petroleum resources are decreasing and degrading, environmental protection regulations are becoming stricter and stricter, making the hydrogenation catalyst required for oil refining required to have superior activity and a longer service life, and its production and use process should be as pollution-free as possible and achieve clean operation. [0003] At present, the commonly used hydrogenation catalyst is based on alumina or alumina carrier containing a small amount of additives. The shapes are mainly clover, butterfly and cylinder. This type of catalyst has the characteristics of high molding efficiency and large production capacity. However, due to its poor flow performance, it is difficult to achieve uniform dense ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J21/04B01J35/08
Inventor 梁维军贺勇宋志东罗河倪黎邓杰刘辉
Owner CHINA PETROLEUM & CHEM CORP
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