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Method for preparing alumina catalyst carrier

A technology of catalyst carrier and alumina, which is applied in the direction of catalyst carrier, catalyst activation/preparation, physical/chemical process catalyst, etc., and can solve the problems that cannot be made

Active Publication Date: 2016-12-07
JIANGXI ACICHEMSHUN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, large monolithic catalysts cannot be made, and other large special-shaped activated aluminas have never been seen.

Method used

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  • Method for preparing alumina catalyst carrier
  • Method for preparing alumina catalyst carrier
  • Method for preparing alumina catalyst carrier

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Experimental program
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Embodiment Construction

[0023] The present invention is further described in detail below through examples, but the present invention is not limited only to the following examples.

[0024] The 3d printing mechanism of the present invention, as attached figure 1 Shown: including a feeding container 1, a nozzle 1.1 is arranged below the feeding container, a roller 2 capable of running along the X axis is arranged under the nozzle; a lifting platform 3 is arranged below the roller, and the lifting platform 3 is arranged below the roller. A controller 4 is arranged above, and a glue nozzle 5 and a laser 6 are arranged at the lower end of the controller 4; details are as attached figure 2 A base 7 is arranged below the lift platform 3 of the present invention, the base is provided with a lead screw 8 that drives the lift platform to move up and down, guide rods 9 are provided on both sides of the lead screw, and the bottom of the base is provided with a first motor 10 for driving the lead screw The lif...

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Abstract

The invention discloses a method for preparing an alumina catalyst carrier. The method comprises the following steps: uniformly mixing the following components in the ratio: 30-80 percent of pseudo-boehmite, 10-50 percent of superfine cellulose powder and 5-30 percent of quick-dehydrating powder; uniformly mixing, and grinding the mixed materials; preparing an acid solution in a weight ratio of acid to water being (0.5-30):100; adding the ground powder into a charging container; adding the prepared acid solution into a pressurized and flow-controllable container; printing the charging container filled with powder on a 3D printing mechanism under computer control layer by layer to obtain a finished product of a profiled large active alumina carrier. The method can be used for manufacturing mass integrated active alumina catalyst and preventing the phenomenon of dry cracking.

Description

technical field [0001] The invention relates to the technical field of activated alumina catalyst carrier, in particular to a preparation method of alumina catalyst carrier. Background technique [0002] Activated alumina is in various crystal forms, among which the gamma form is the most widely used. Regardless of the crystal phase of activated alumina, its water absorption is different from that of ordinary ceramic materials. In addition, activated alumina is easy to expand after absorbing water, which causes its drying shrinkage to be very large, and the shrinkage rate is between 4-12%. between. Large shrinkage means large stress. Therefore, it is difficult to manufacture activated alumina products into large-volume shaped catalyst supports. Taking the honeycomb activated alumina carrier as an example, usually its diameter reaches about 25 mm, and the problem of dry cracking will occur when the thickness reaches more than 10 mm. Although this problem can be solved by sl...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J21/04B01J37/00
CPCB01J21/04B01J37/00
Inventor 姚光纯
Owner JIANGXI ACICHEMSHUN IND
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