Method for preparing integrated molecular sieve blocks on basis of 3D printing technology

A 3D printing, molecular sieve technology, applied in molecular sieve catalysts, chemical instruments and methods, ceramic products, etc., can solve the problems of large pressure drop of catalysts, low mass or heat transfer efficiency, easy wear, etc. High mass and heat transfer efficiency, the effect of increasing the mass transfer rate

Pending Publication Date: 2019-01-08
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for intelligently designing and preparing monolithic molecular sieve blocks based on 3D printing technology, which overcomes the large pressure drop, mass transfer or transfer of existing granular, spherical, and strip adsorbents or catalysts. Disadvantages such as low thermal efficiency and easy wear and tear during use

Method used

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  • Method for preparing integrated molecular sieve blocks on basis of 3D printing technology
  • Method for preparing integrated molecular sieve blocks on basis of 3D printing technology
  • Method for preparing integrated molecular sieve blocks on basis of 3D printing technology

Examples

Experimental program
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Effect test

Embodiment 1

[0034] (1) Mix the commercialized 4A molecular sieve powder (belonging to LTA topological structure) with kaolin and ceramic fiber, grind it manually with agate for half an hour, and then mechanically stir it for 1 hour to obtain the mixed powder; the organic plasticizer carboxymethyl Add base cellulose and pore-forming agent flour to water equivalent to 45% of the mass of 4A molecular sieve powder, mix to a uniform jelly, then add to the above mixed powder, and use mechanical stirring to mix again to obtain a uniform paste mixture; paste In the mixture, the mass fraction of 4A molecular sieve powder is 80%, the mass fraction of kaolin is 10%, the mass fraction of ceramic fiber is 3%, the mass fraction of organic plasticizer is 4%, and the mass fraction of pore-forming agent is 3%;

[0035] (2) Ultrasonic treatment is carried out to the paste mixture obtained, the ultrasonic power is 40 kHz, and the ultrasonic time is 10 minutes, to eliminate the air bubbles wrapped in the pas...

Embodiment 2

[0039] (1) Manually grind the commercial NaX molecular sieve powder (belonging to the FAU topology) with attapulgite and glass fiber with agate for 1 hour, and then mechanically stir for 1 hour to obtain a mixed powder; at the same time, the organic plasticizer Add polyvinyl alcohol and pore-forming agent cornstarch to water with 50% of the mass of NaX molecular sieve powder, mix to a uniform jelly, then add to the above-mentioned mixed powder, and use mechanical stirring to mix again to obtain a uniform paste mixture; , the mass fraction of NaX molecular sieve powder is 75%, the mass fraction of attapulgite is 13%, the mass fraction of glass fiber is 2%, the mass fraction of polyvinyl alcohol is 5%, and the mass fraction of corn starch is 5%;

[0040] (2) Ultrasonic treatment is carried out to the paste mixture obtained, the power is 30 kilohertz, and the time is 20 minutes, to eliminate the air bubbles wrapped in the paste;

[0041] (3) Use Auto CAD software to construct the...

Embodiment 3

[0045] (1) The commercial ZSM-5 molecular sieve powder (belonging to MFI topological structure) and sepiolite and quartz fiber were manually ground for 20 minutes with an agate mortar, and then mechanically stirred for 2 hours to obtain a mixed powder; at the same time, The organic plasticizer polyacrylamide and the pore-forming agent kale powder are added to water with a mass of 30% of the MFI molecular sieve powder, mixed to a uniform jelly, then added to the above-mentioned mixed powder, and mixed again by mechanical stirring to obtain a uniform paste Mixture;; In the pasty mixture, the mass fraction of ZSM-5 molecular sieve powder is 70%, the mass fraction of sepiolite is 18%, the mass fraction of quartz fiber is 4%, and the mass fraction of polyacrylamide is 4%, The mass fraction of tianjing powder is 4%;

[0046] (2) Ultrasonic treatment is carried out to the paste mixture obtained, the power is 20 kilohertz, and the time is 30 minutes, to eliminate the air bubbles wrapp...

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Abstract

The invention discloses a method for preparing integrated molecular blocks on basis of a 3D printing technology, and belongs to the field of molecular sieve type adsorbent or catalyst processing. Themethod comprises the following steps of: (1) uniformly mixing a molecular sieve body with an inorganic binder, an inorganic fiber, an organic shaping auxiliary, a pore forming agent and water so as toconfigure a pasty mixture; (2) carrying out ultrasonic treatment on the pasty mixture; (3) designing a printing program; (4) printing molecular sieve blocks by utilizing a 3D printer; and (5) carrying out low-temperature aging shaping and high-temperature roasting. According to the method, the 3D printing technology is applied to intelligent preparation of molecular sieve type bodies for the time, so that the method has the advantages of being simple to operate, low in cost and high in material utilization rate; and the molecular sieve blocks have the advantages of being wear-resistant, highin mechanical strength, developed in pores, uniform in micropore-mesopore-macropore grade pore structure, small in pressure reduction and high in mass transfer rate, and is suitable for processing various molecular sieve adsorbents and catalysts.

Description

technical field [0001] The invention belongs to the technical field of preparation of molecular sieve adsorbents or catalysts, and specifically relates to a method for intelligently designing and preparing integral molecular sieve blocks with high mechanical strength and high porosity based on 3D printing technology. Background technique [0002] Molecular sieve is a three-dimensional hollow skeleton crystal material formed by silicon-oxygen tetrahedron and aluminum-oxygen tetrahedron by sharing oxygen atoms. Because of its unique pore structure and solid acid properties, it is widely used in gas separation and purification, catalysis, ion exchange, etc. field. Generally, the crystal size of the synthesized molecular sieve is 0.1-10 μm. When used as an adsorbent or catalyst, it needs to be processed into millimeter-sized particles, spheres, strips, etc., but these adsorbents or catalysts generally have a large pressure drop. , low mass transfer or heat transfer efficiency, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/13C04B33/36C04B38/06B28B1/00B33Y10/00B01J20/28B01J20/30B01J29/40B01J29/08B01J29/70B01J29/72B01J29/85
CPCB01J20/28042B01J20/3042B01J29/082B01J29/40B01J29/7003B01J29/723B01J29/85B28B1/001B33Y10/00C04B33/13C04B33/36C04B38/0645C04B2235/3463C04B2235/3472C04B2235/447C04B2235/5216C04B2235/5232C04B2235/6562C04B2235/6567C04B2235/658C04B2235/6581C04B2235/6583
Inventor 于吉红王双李冬冬白璞闫文付
Owner JILIN UNIV
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