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Modified ferrierite as well as preparation method and application thereof

A ferrierite and modification technology, applied in the field of modified ferrierite and its preparation, can solve the problems of low initial isoolefin selectivity and yield, multiple side reactions, etc., so as to suppress side reactions and improve yield , the effect of high application prospects

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

In the above-mentioned patents, hydrogen-type FER zeolites are used as catalysts. On these catalysts, the selectivity and yield of initial isoolefins are usually low, accompanied by more side reactions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 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 roasted at 550°C to obtain hydrogen-type ferrierite, marked as A1, in which Na 2 O and K 2 The total content of O is less than 0.01%, SiO 2 / Al 2 o 3 The molar ratio was 17.1.

Embodiment 2

[0022] 20 g of NaK-FER zeolite, 1.07 g of NH 4 Cl and 400 g deionized water were mixed evenly to make a slurry, stirred at room temperature (25°C) for 2 hours, then filtered, and the filter cake was thoroughly rinsed with deionized water 30 times the dry weight of NaK-FER zeolite, and dried at 110°C Drying and roasting at 550 ° C to obtain sodium potassium hydrogen type ferrierite, marked as A2, wherein by weight percentage, Na 2 O content is 0.08%, K 2 O content is 4.51%, SiO 2 / Al 2 o 3 The molar ratio was 16.7.

Embodiment 3

[0024] Get A2 sample 10 g among the embodiment 2 and place in 500 ml four-necked flask, add 0.5 g hexamethyldisilazane and 100 ml toluene, in N 2 Under the atmosphere, stir at 50°C for 2 hours, filter and wash with ethanol, dry at 110°C for 12 hours, and then bake at 550°C for 8 hours to obtain the sample A2B1 of the present invention, wherein the silicon introduced by surface silanization is SiO 2 The mass percentage content of is calculated as 0.08%.

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Abstract

The invention discloses a modified ferrierite as well as a preparation method and application thereof. The modified ferrierite is prepared from the following component in percentage by weight: 0.02-0.1% of Na2O, 1.0-5.0% of K2O and 0.05-0.5% of SiO2 in silicon introduced for surface silanization, wherein the molar ratio of the SiO2 to the Al2O3 in the modified ferrierite is 8-50. The modified ferrierite is prepared by exchanging sodium-potassium ferrierite by ammonium partially to obtain sodium-potassium-hydrogen ferrierite and silanizing the surface of the sodium-potassium-hydrogen ferrierite. Due to the adoption of the preparation method, the number of hydroxyls and acid sites on the outer surface of the ferrierite can be reduced effectively. The silanized and modified ferrierite has good use performance in the straight-chain olefin isomerization reaction.

Description

technical field [0001] The invention relates to a modified ferrierite and its preparation method and application, in particular to a silanized modified sodium potassium hydrogen type ferrierite and its preparation method and application. Background technique [0002] Ferrierite or FER zeolite has one-dimensional ten-membered ring straight channels (0.42×0.54 nm) along the [001] direction and one-dimensional eight-membered ring straight channels (0.35×0.48 nm) along the [010] direction. The channels intersect vertically. Due to the unique shape-selective effect of its ten-membered ring straight channel, FER zeolite exhibits good catalytic activity, selectivity and stability in the process of isobutene from n-butene skeletal isomerization (Hou?vi?ka J. and Ponec V ., Catal. Rev.-Sci. Eng., 1997, 39(4), 319). [0003] US 5,510,560 discloses a hydrogen type FER zeolite catalyst for linear olefin skeletal isomerization. Compared with silica, clay or binderless molding, the perf...

Claims

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Application Information

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IPC IPC(8): C01B39/02B01J29/40B01J29/65B01J29/70C07C5/27C07C11/09
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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