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Alkali earth metal modified ferrierite, and preparation method and application thereof

A ferrierite and alkaline earth metal technology, applied in chemical instruments and methods, catalyst activation/preparation, isomerization hydrocarbon production, etc., can solve problems such as low isoolefin yield, and achieve high isobutene yield and high application prospect. Effect

Active Publication Date: 2014-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the catalysts for the production of isoolefins by isomerization of linear olefins disclosed in the above-mentioned patents have their own characteristics, there are still problems such as low yields of isoolefins.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 200 g of NaK-FER zeolite, 214 g of NH 4 Cl and 4000 g deionized water were mixed evenly to make a slurry, stirred at room temperature (25°C) for 2 hours, filtered, and then the above exchange process was repeated at room temperature (25°C), and filtered after the exchange, the obtained filter cake was washed with 30 times NaK -FER zeolite was rinsed thoroughly with deionized water on a dry basis, dried at 110°C and calcined at 550°C to obtain hydrogen-type ferrierite, marked as Mg-HF-0, where Na 2 O and K 2 The total weight content of O is less than 0.01%, SiO 2 / Al 2 o 3 The molar ratio was 17.1.

Embodiment 2

[0025] Get Mg-HF-0 sample 10 g among the embodiment 1, the hexahydrate MgCl of 20.3 g 2 Mix it with 200 g of deionized water to make a slurry, stir at 70°C for 2 hours, filter, dry at 110°C for 12 hours, and bake at 550°C for 8 hours. The obtained sample is marked as Mg-HF-1. Among them, by weight percentage of zeolite, magnesium is Mg 2+ The calculated content is 0.14%, Mg 2+ The degree of exchange is 3.3%, SiO 2 / Al 2 o 3 The molar ratio was 16.7.

Embodiment 3

[0027] Get Mg-HF-0 sample 10 g among the embodiment 1, the hexahydrate MgCl of 20.3 g 2 Mix with 200 g of deionized water to make a slurry, stir at 70°C for 2 hours, filter, and then stir at 70°C for 2 hours, a total of 3 times, then dry at 110°C for 12 hours, and then bake at 550°C At 8 hours, the resulting sample was labeled Mg-HF-3. Among them, by weight percentage of zeolite, magnesium is Mg 2+ The calculated content is 0.41%, Mg 2+ The degree of exchange is 9.5%, SiO 2 / Al 2 o 3 The molar ratio was 16.9.

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Abstract

The invention discloses an alkali earth metal modified ferrierite, and a preparation method and application thereof. Based on the weight percent of zeolite, the modified ferrierite comprises 0.1-1.5% of alkali earth metal based on Me<2+>; and the SiO2 / Al2O3 mol ratio is 8-50. The modified ferrierite is prepared from hydrogen ferrierite through an alkali earth metal ion exchange method; and the method comprises the following steps: uniformly pulping the hydrogen ferrierite and an alkali earth metal solution, and exchanging at 20-95 DEG C for 1-8 hours, wherein the exchange is performed 1-10 times; and then, filtering the pulp, leaching, drying, and roasting. The modified ferrierite prepared by the method disclosed by the invention can achieve higher isobutylene yield in isobutylene preparation reaction based on n-butylene skeleton isomerization in comparison with unmodified hydrogen ferrierite.

Description

technical field [0001] The invention relates to an alkaline earth metal modified ferrierite and its preparation method and application, in particular to a magnesium modified ferrierite and its preparation method and application. Background technique [0002] Ferrierite, or FER zeolite, is a zeolite with mesopore structure. Due to the unique shape-selective effect of ferrierite channels, it is suitable for various shape-selective catalytic reactions. In recent years, it has been found that ferrierite exhibits good catalytic activity and selectivity in the process of isomerization of n-butene to isobutene. At the same time, the FER zeolite framework also has the characteristics of high hydrothermal stability and thermal stability. EP 0,501,577, US 5,510,560 and US 6,323,384 respectively disclose a hydrogen-type ferrierite catalyst for isomerization of linear olefins to produce isoolefins. CN1142787A discloses a method for preparing a zeolite catalyst for isomerizing linear ol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/65B01J37/30C07C5/27C07C11/09C07C11/10
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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