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Hydrophobic zeolite, method for producing same and use of same

A manufacturing method and hydrophobic technology, applied in separation methods, chemical instruments and methods, crystalline aluminosilicate zeolites, etc., can solve the problems of insufficient adsorbent and high desorption temperature, and achieve the effect of high adsorption capacity of organic compounds

Pending Publication Date: 2022-02-01
TOSOH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrocarbon adsorbent described in Patent Document 2 has a high desorption temperature of hydrocarbons adsorbed on zeolite, and is insufficient as an organic compound adsorbent that seeks desorption of adsorbed substances at low temperatures.

Method used

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  • Hydrophobic zeolite, method for producing same and use of same
  • Hydrophobic zeolite, method for producing same and use of same
  • Hydrophobic zeolite, method for producing same and use of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] Commercially available proton type BEA type zeolite (HSZ-940HOA: manufactured by Tosoh Corporation, SiO 2 / Al 2 o 3 The molar ratio is 40) 10 g was added to 100 g of 2N hydrochloric acid, and it stirred at 70 degreeC for 2 hours. Thereafter, solid-liquid separation was performed, washed with 2 L of warm pure water, and dried overnight at 110°C. According to ICP emission analysis, the SiO of the resulting dealuminated zeolite 2 / Al 2 o 3 The molar ratio was 480.

[0093] The hydrophobic zeolite of the present invention was obtained by heat-treating (contacting with water vapor) this dealuminated zeolite at 840°C for 2 hours in an 80% by volume water vapor atmosphere. SiO 2 / Al 2 o 3 The molar ratio was 480. In addition, the moisture adsorption amount and the toluene adsorption amount at 25°C are shown in figure 1 , 2 and Table 1.

[0094] For the hydrophobic zeolite of the present invention obtained in Example 1, measure 1 H MAS NMR spectrum. show the res...

Embodiment 2

[0097] The hydrophobic zeolite of the present invention was obtained by heat-treating (contacting with steam) the dealuminated zeolite obtained in Example 1 before steam treatment at 740° C. in a steam atmosphere of 60% by volume for 2 hours. SiO 2 / Al 2 o 3 The molar ratio was 480. In addition, the moisture adsorption amount and the toluene adsorption amount at 25°C are shown in figure 1 , 2 and Table 1.

[0098] For the hydrophobic zeolite of the present invention obtained in Example 2, measure 1 H MAS NMR spectrum. show the result in image 3 . Furthermore, the spectral intensity (Y-axis) of this figure is magnified to 5 times and shown in Figure 4 . In addition, Table 2 shows the amount of hydroxyl groups calculated from the sum of the integrated values ​​of the peak near 0.7 ppm, the peak near 1.8 ppm, and the peak near 2.2 ppm in chemical shift.

[0099] Depend on image 3 It is clear that the hydrophobic zeolite of the present invention obtained in Example...

reference example 1

[0112] According to the embodiment 2 of Japanese Patent Application Laid-Open No. 2008-080195, SiO 2 / Al 2 o 3 The zeolite with the increased molar ratio was heat-treated (contacted with water vapor) at 850°C for 1 hour in a 10% by volume water vapor atmosphere to obtain the BEA-type zeolite of Reference Example 1. SiO 2 / Al 2 o 3 The molar ratio was 530. In addition, the moisture adsorption amount and the toluene adsorption amount at 25°C are shown in figure 1 , 2 and Table 1.

[0113] [Table 1]

[0114]

[0115] The adsorption amount is represented by mass (g) per 100 g of zeolite.

[0116] Depend on figure 1 , figure 2 It is clear from Table 1 that the hydrophobic zeolite of the present invention has both high hydrophobicity and high organic compound adsorption performance.

[0117] For organic compound adsorbents, as described above, zeolites with low moisture adsorption, ie, high hydrophobicity, are required from the viewpoint of increasing the adsorptio...

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Abstract

The present invention provides a hydrophobic zeolite having both high hydrophobicity and high organic compound adsorption capacity, which have not been able to be achieved by conventional zeolites. A hydrophobic zeolite which has a water adsorption of (6 g / 100 g of zeolite) or less at 25degC at RH 60% and a toluene adsorption of (9 g / 100 g of zeolite) or more at 25degC at 0.01 kPa.

Description

technical field [0001] The present invention relates to hydrophobic zeolite, its production method and its use. The hydrophobic zeolite of the present invention is useful, for example, for selectively removing or recovering an organic compound from a mixed gas containing water vapor, or as a catalyst for a process of competing reaction with water. Background technique [0002] Organic compounds discharged from coating equipment, printing equipment, cleaning equipment for industrial products, etc. are causes of air pollution such as floating particulate matter and photochemical oxidants, and reduction of the discharge amount is sought. And, in order to reduce this organic compound, various organic compound adsorbents have been developed. [0003] In recent years, organic compound adsorbents using zeolites have been proposed, but generally zeolites have a large amount of moisture adsorption, so the adsorption amount of volatile organic compounds is relatively low, or the adso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01D15/08C01B39/02C01B39/04
CPCB01J20/186B01D15/08C01B39/02C01B39/026C01B39/04B01D15/00C01B39/46B01J29/06B01J29/7007B01J29/7215B01J29/064B01J2229/10B01J2229/16B01J2229/36B01J2229/37B01D53/02B01D2253/1085B01D2253/108B01D2257/70B01D2258/0258B01J20/28011B01J20/28004B01J20/3078B01J20/3085B01J20/3238B01J20/28045B01J20/28016
Inventor 冈庭宏福井惠
Owner TOSOH CORP