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Sodium-potassium-hydrogen type ferrierite and method for preparing same

A technology of ferrierite and sodium potassium hydrogen, applied in the field of sodium potassium hydrogen type ferrierite and its preparation, can solve problems such as unsuitable zeolite preparation, and achieve the effects of inhibiting side reactions, high application prospect and high isobutene selectivity

Active Publication Date: 2013-04-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the conventional ion exchange method is not suitable for the preparation of such zeolites

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Add 20 g of NaK-FER zeolite, 0.21 g of NH 4 Mix Cl and 400 g of deionized water to make a slurry, stir at room temperature (25°C) for 2 hours, and then filter. The filter cake is thoroughly rinsed with deionized water 30 times the weight of NaK-FER zeolite dry basis, and dried at 110°C. Dry and calcine at 550°C to obtain the sample NH-1 of the present invention. The performance is shown in Table 1.

Embodiment 2

[0015] Add 20 g of NaK-FER zeolite, 0.43 g of NH 4 Mix Cl and 400 g of deionized water to make a slurry, stir at room temperature (25°C) for 2 hours, and then filter. The filter cake is thoroughly rinsed with deionized water 30 times the weight of NaK-FER zeolite dry basis, and dried at 110°C. Dry and calcine at 550°C to obtain the sample NH-2 of the present invention. The properties are shown in Table 1.

Embodiment 3

[0017] Add 20 g of NaK-FER zeolite, 0.86 g of NH 4 Mix Cl and 400 g of deionized water to make a slurry, stir at room temperature (25°C) for 2 hours, and then filter. The filter cake is thoroughly rinsed with deionized water 30 times the weight of NaK-FER zeolite dry basis, and dried at 110°C. Dry and calcine at 550°C to obtain the sample NH-3 of the present invention. The properties are shown in Table 1.

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Abstract

The invention discloses sodium-potassium-hydrogen type ferrierite and a method for preparing the same. The sodium-potassium-hydrogen type ferrierite comprises 0.02%-0.1wt% of Na2O, 1.0%-5.0wt% of K2O, wherein the molar ratio of SiO2 to Al2O3 is 8-50. The method adopts a sodium-potassium-hydrogen type ferrierite partial ammonium exchange method. The method comprises that the sodium-potassium-hydrogen type ferrierite and an inorganic ammonium salt water solution with a certain concentration are pulped uniformly, and the exchanged pulp is filtered, eluted, dried and calcinated. After the method is adopted, the pH value of the exchange fluid does not need to be adjusted, the concentration of the inorganic ammonium salt water solution only needs to be changed, and the sodium-potassium-hydrogen type ferrierite with an appropriate total alkali metal content can be obtained through one or two times of exchange at room temperature and has good usability in straight-chain olefin isomerization reaction.

Description

Technical field [0001] The invention relates to a sodium potassium hydrogen ferrierite and a preparation method thereof. Background technique [0002] Ferrierite zeolite or FER zeolite is a kind of mesoporous structure zeolite. Its basic structural unit is a five-membered ring. These five-membered rings are organically connected through ten-membered, eight-membered and six-membered rings to form the FER zeolite framework. . FER zeolite has one-dimensional ten-membered ring straight pores (0.42×0.54 nm) along the [001] direction, and one-dimensional eight-membered ring straight pores (0.35×0.48 nm) along the [010] direction. The two pores intersect perpendicularly and crosswise. The surface is elliptical, and the diameter of the cage-like structure formed at the intersection of the two channels is about 0.6 to 0.7 nm. Due to the unique shape-selective effect of FER-type zeolite channels, it is suitable for a variety of shape-selective catalytic reactions. In recent years, it ha...

Claims

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Application Information

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IPC IPC(8): C01B39/50
Inventor 周峰陈明张淑梅张宝国翟庆铜苏杰
Owner CHINA PETROLEUM & CHEM CORP
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