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Alumina carrier and ball-rolling molding method and application thereof

A technology of alumina carrier and molding method, which is applied in the direction of catalyst carrier, chemical instrument and method, metal/metal oxide/metal hydroxide catalyst, etc. Large diameter and other problems, to achieve the effect of smooth and smooth surface, strong operation controllability, and concentrated particle size

Active Publication Date: 2016-06-01
BEIJING ENERGY ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide an alumina carrier in order to overcome the defects of the existing alumina carrier such as excessively large diameter, uneven particles, low strength, inflexible control of pile ratio, excessive industrial dust, and poor wear resistance. rolling ball forming method

Method used

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  • Alumina carrier and ball-rolling molding method and application thereof
  • Alumina carrier and ball-rolling molding method and application thereof
  • Alumina carrier and ball-rolling molding method and application thereof

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specific Embodiment approach

[0031] According to another preferred embodiment of the present invention, the method may also include: before step (3), the homogenized powder described in step (2) is ultra-fine to obtain a particle size of Powder below 0.074mm.

[0032] According to the present invention, the ultrafine refers to pulverizing powder or granules to a particle size of less than 0.074mm. There is no special limitation on the ultrafine device, as long as the powder or granule can be pulverized to a particle size of less than 0.074mm. For example, what adopted in the embodiment of the present invention is the high-speed pulverizer of Tester 24000r / min.

[0033] According to the present invention, the spray glue is obtained by contacting the alcohol polymer to the squash gum with a weight ratio of preferably 1-3:1 in an aqueous solvent. Wherein, the solid content of the squash gum in the aqueous solvent is preferably 2-8% by weight.

[0034] According to the present invention, in order to make t...

Embodiment 1

[0063] 40g polyvinyl alcohol (the number-average molecular weight is 2000) and 20g kale powder are pulverized on a pulverizer to obtain a powder below 0.074mm, and the powder is dropped into 1000ml of ionized water, and the powder is mixed at a temperature of 60°C. The material was stirred into a colloid, and left to stand for 12 hours to obtain a spray glue.

[0064] 40g citric acid, 30g acetic acid (concentration is 100%) and 20g nitric acid (concentration is 100%) are mixed, obtain the mixed acid of 90g; 10g methylcellulose is dropped into the deionized water of 1000ml, stir 3 hours at 25 ℃, After standing still for 12 hours, 260 g was added to the aforementioned mixed acid to obtain a kneaded gel.

[0065] Put 1000g of SB aluminum hydroxide into the kneader at a speed of 25r / min, pour 350g of kneading glue into the kneader twice, and knead for 0.5 hours to obtain a homogenized powder, and put the homogenized powder into Pulverize in the pulverizer, and then screen out the...

Embodiment 2

[0067] Rolling ball molding was carried out according to the method of Example 1 to obtain a spherical alumina carrier B. The properties of the carrier are shown in Table 1. The difference is: SB aluminum hydroxide is replaced by macroporous aluminum hydroxide.

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Abstract

The invention discloses an alumina carrier and ball-rolling molding method and an application thereof. The method comprises the following steps: 1) an alcohol polymer and sesbania gum are contacted in an aqueous solvent to obtain a spray glue, wherein a number-average molecular weight of the alcohol polymer is 1500-2000; an acid source and methyl cellulose are contacted in the aqueous solvent to obtain a kneading glue; 2) an alumina source and the kneading glue are homogenized to obtain the homogenized powder; 3) the partially homogenized powder is subjected to first ball-rolling molding to prepare a female ball, the residual homogenized powder is added for second ball-rolling molding to mold the female ball and grow up the female ball. The method has the advantages of simple process, no pollution, no massive industrial dust generation, strong operation controllability, and strong repeatability; a prepared catalyst or a carrier has the advantages of high intensity, flexible ratio regulation and control, good wear resistance, ideal wearing index, concentrated and uniform particle size, and smooth surface; and the method is suitable for producing small microspheres with sizes of 0.5 millimeters, 1.0 millimeter, 1.5 millimeters and 2.0 millimeters.

Description

technical field [0001] The invention relates to an alumina carrier and its rolling ball forming method and application. Background technique [0002] In the industrial practice of refining and chemical industry, fine chemical industry and modern clean energy coal refining, coal chemical industry and coal gas at home and abroad, a large number of catalysts with alumina carrier as the medium are used. Among these catalysts, due to the different catalyst forming methods and processes, The catalytic properties of the prepared catalysts vary greatly. The physical and chemical properties of the catalyst, the geometric shape of the particles, the uniformity of the particles, the strength, the bulk ratio, the pore structure, the specific surface area, and the material structure and shape of the carrier also have great differences. . [0003] Alumina, SBγ-Al 2 o 3 With its unique pore structure and good catalytic performance, it has become a sharp weapon for famous foreign petroch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J21/04B01J37/00B01J23/656C10G35/09C10G11/04
Inventor 曲良龙陈亚军许胜军孙作霖
Owner BEIJING ENERGY ENG TECH
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