A kind of preparation method of alumina microsphere

An alumina and microsphere technology, applied in chemical instruments and methods, catalyst carriers, chemical/physical processes, etc., can solve problems such as pollution of the environment, and achieve the effects of avoiding nitrogen oxides, saving costs, and colloidal uniformity.

Active Publication Date: 2021-03-23
REZEL CATALYSTS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method avoids the use of organic amines, but still does not get rid of nitrogen-containing substances sideways, and there is still a hidden danger of polluting the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] It is called 146.2G to be mixed with 331.74 water, grinding in JM-L100 colloidal grinding, and is applied to a thin water aluminum stone size D50 ≤ 3 μm, adding aluminum sol 22.06g, then grinding 10 min, slowly adding concentration of 30%. The hydrochloric acid was 3.10, dried into the vegetable oil into the plant oil, heat the oil to 120 ° C, constant temperature 300min, remove the aluminum oxide ball in a dilute hydrochloric acid of 0.1 mol / L, and dried 120 minutes at 600 ° C at 600 ° C at 600 ° C after drying at 80 ° C after drying 120min 120min to get alumina balls.

Embodiment 2

[0026] According to the steps of Example 1, aluminum oxide balls were prepared, and the weight of the placed aluminum stone was 141.5 g, and the weight of the water was 223.2 g, and the weight of the aluminum sol was 35.3 g. The formic acid was slowly added to a pH of 3.10, dripped into the heat of heat oil, heated to 150 ° C, constant temperature 240min, remove the aluminum oxide ball in dilute hydrochloric acid in 0.1 mol / L, at 80 ° C for 120min after 120min at 600 ° C Baked 120 min to give alumina balls.

Embodiment 3

[0028] The aluminum oxide ball was prepared according to the steps of Example 2, and the aluminum hydrochloride was added to a pH of 30% to a pH of 3.10, and the oil was added to 180 ° C, and the alumina ball was taken from 0.1 mol. The dilute hydrochloric acid of / L was washed with 120 minutes at 80 ° C for 120 minutes at 600 ° C to give the alumina ball.

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Abstract

The invention belongs to the field of catalyst carriers, in particular to a preparation method for an aluminum oxide microsphere, and the preparation method comprises the following steps: mixing an aluminum source with water and grinding until grain size D50 is smaller than or equal to 3 microns, adding alumina sol, and continuously grinding and acidifying to prepare gel; and dropwise adding the gel into oil to form, heat and cure, taking out cured particles to wash, dry and roast, thereby obtaining the aluminum oxide microsphere. The aluminum soil, the aluminum source and acid gel are prepared into gel, forming and curing are performed in oils, nitrogen-containing substances are not used throughout the whole process, nitrogen oxides are prevented from being generated in a follow-up process, tail gas treating difficulty is reduced, and cost is reduced.

Description

Technical field [0001] The invention belongs to the field of catalyst carriers, and more particularly to the preparation method of alumina microspheres. Background technique [0002] Aluminum oxide as a basic material commonly used in catalysts, has a wide range of applications in the field of petrochemical workers, with approximately to the following: microspheres, spherical, strip (cylindrical, clover, four-leaf, etc.), or FCC catalyst The in the form of a matrix. Among them, the spherical carrier prepared by the method has a higher strength of the spherical carrier prepared by the mobile bed catalyst on the strength. [0003] The process of spherical alumina production can be divided into two categories, one is mechanical molding, such as turntable molding, extrusion molding (squeezing, shaping), etc., spherical alumina produced by mechanical force molding The carrier has natural defects in terms of strength, sphericalness, and the other is to rely on surface tension molding, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J35/08B01J35/10
CPCB01J32/00B01J35/08B01J35/1019B01J35/1038
Inventor 卓润生张平黄大勇杨光友
Owner REZEL CATALYSTS CORP
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