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High-strength zeolite bead molding and method for producing the same

A manufacturing method and a technology for a shaped body, which are applied in separation methods, chemical instruments and methods, crystalline aluminosilicate zeolite, etc., can solve the problems of high shaped body, inability to use Freon desiccant, and inability to obtain sphericity, etc. Excellent effect of strength and wear resistance

Inactive Publication Date: 2011-09-07
TOSOH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although high-strength particles can be obtained by such a method, it cannot be used as a Freon desiccant for automobiles because it cannot obtain a molded product with a high degree of sphericity.

Method used

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  • High-strength zeolite bead molding and method for producing the same
  • High-strength zeolite bead molding and method for producing the same
  • High-strength zeolite bead molding and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] 40 parts by weight of kaolin clay was mixed with 100 parts by weight of zeolite (K ion-exchanged A-type zeolite), and then 50 parts by weight of water was mixed with 100 parts by weight of the total of zeolite and kaolin clay, and tumbling granulation was performed, and sieving was used. A preform of 1.7 mmφ was obtained. The water content (in terms of loss on ignition when calcined at 900° C.) of the molded preform was 36 parts by weight. With respect to 100 parts by weight of the solid content of the preform, add 3 parts by weight of kaolin clay from a different production area from that used in the molding of the molded body, adjust the water content of the molded body to 37 parts by weight with a sprayer, and continue A 70-minute rolling mill was performed. Thereafter, it was dried and fired at 680° C. for 5 hours.

[0072] The characteristics of the obtained bead molded body are shown in Table 1, and the cross-section (surface) of the shaped body after sizing is ...

Embodiment 2

[0074] The same process as in Example 1 was performed except that kaolin clay from the same production area was used in molding and tumbling sizing, and that the binder added during tumbling sizing was 0.1 parts by weight.

[0075] The characteristics of the obtained bead molded body are shown in Table 1, and the cross-section (surface) of the shaped body after sizing is shown in Table 1. figure 2 . Confirm that a protective film is formed on the surface of the molded article.

Embodiment 3

[0077] 43 parts by weight of kaolin clay was mixed with 100 parts by weight of zeolite (K ion-exchanged A-type zeolite), and then 55 parts by weight of water was mixed with 100 parts by weight of the total of zeolite and kaolin clay, and formed by tumbling granulation and sieving A preform of 1.7 mmφ was obtained. The water content (in terms of loss on ignition when calcined at 900° C.) of the molded preform was 38 parts by weight. With respect to 100 parts by weight of the solid content of the preform, add 3 parts by weight of kaolin clay from the same origin as that used in the molding of the molded product, adjust the water content of the molded product to 39 parts by weight with a sprayer, and continue 70 minutes of rolling whole grains. Thereafter, it was dried and fired at 680° C. for 5 hours.

[0078] Table 1 shows the characteristics of the obtained bead molded body.

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Abstract

Shaped beads formed from a zeolite and a clay binder by tumbling granulation is problematic in that the strength and abrasion resistance are poor. Shaped zeolite beads with an average diameter of 1.0 to 3.0 and having a compressive strength of 35 N or greater (particularly 70 N or greater) when hydrated and an abrasion resistance factor of 1.5% or less are obtained by subjecting a composition of at least 35 parts by weight of water per 100 parts by weight of zeolite and clay binder combined to tumbling granulation and then adding 4 parts by weight or less of clay binder per 100 parts by weight of the molding (excluding the water content), subjecting the product to tumbling granulation, drying and baking. Preferably the zeolite crystals used are 5 [mu]m or smaller; between 10 and 50 parts by weight of clay binder are used; and the same type of clay binder is used for molding and grading.

Description

technical field [0001] The present invention relates to a high-strength, especially high-wear-resistant zeolite bead molded body and a method for producing the same. For example, zeolite bead moldings used in freon desiccants for automobile air conditioners particularly require high strength and high wear resistance so that they will not be pulverized by engine-driven vibrations. Background technique [0002] Zeolite bead molded products are widely used as desiccants, and recently, demand for desiccants for automotive air conditioners is increasing. Since automotive air conditioners are exposed to vibrations during use, if the strength and wear resistance are low, they will be pulverized and become a cause of clogging. Therefore, a desiccant with high strength and high wear resistance is required. [0003] As a method of obtaining a desiccant with high strength and high abrasion resistance, for example, a method of using additives such as condensed phosphate in the binder ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/14B01D53/28B01J2/28B01J20/18
CPCB01J20/183B01D2253/304B01D53/28B01D2253/108C01B39/14B01D2253/308
Inventor 平野茂河本泰三
Owner TOSOH CORP
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