Kaolinite-clay-containing in situ crystallizing ZSM-5 and Y type molecular sieve immobilized bed catalyst and preparation thereof

A fixed bed catalyst, ZSM-5 technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of complex preparation process, and achieve good stability, high activity and good strength.

Active Publication Date: 2011-03-16
广西北海惠尔能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the Y-type molecular sieve synthesis technology disclosed by CN1232862, the directing agent needs to be synthesized in advance, so that the preparation process is relatively complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This example illustrates the method of using ZSM-5 as a seed crystal and in situ crystallization of kaolin to synthesize a Y-type molecular sieve to prepare a composite molecular sieve catalyst.

[0042] (1) Take 1000 g of kaolin, put it into a muffle furnace, roast at 1100° C. for 3 hours, crush, grind and sieve after cooling down to obtain roasted kaolin powder.

[0043] (2) Take 800 grams of the above-mentioned roasted kaolin powder, 200 grams of ZSM-5 molecular sieve with a silicon-to-aluminum ratio of 38.2 as the seed molecular sieve, and 50 grams of squash powder as a structural aid, mix and grind evenly. Take 120 grams of silica sol and 30 grams of water glass as a binder. They are first mixed with 960 grams of deionized water to form a liquid, and the liquid is added to the powdery solid, repeatedly extruded, and then extruded into strips and rolled in a spheronizer Form into pellets, dry the pellets at 120° C. for 6 hours, and roast them in a muffle furnace at ...

Embodiment 2

[0047] This example illustrates the method of using NaY as a seed crystal and in-situ crystallization of kaolin to synthesize ZSM-5 molecular sieve to prepare a composite molecular sieve catalyst.

[0048] (1) Take 1000 g of kaolin, put it into a muffle furnace, roast at 1100° C. for 3 hours, crush, grind and sieve after cooling down to obtain roasted kaolin powder.

[0049] (2) Take 800 grams of the above-mentioned roasted kaolin powder, 240 grams of NaY as the seed crystal molecular sieve, and 42 grams of the structural aid of the squash powder, mix and grind evenly. Take 70 grams of silica sol and 35 grams of water glass as a binder. They are first mixed with 1000 grams of deionized water to form a liquid, and the liquid is added to the powdery solid, repeatedly extruded, and then extruded into strips and rolled in a spheronizer Form into pellets, dry the pellets at 120°C for 6 hours, and roast them in a muffle furnace at 850°C for 3 hours to obtain calcined pellets with a ...

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PUM

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Abstract

The present invention provides a fixed bed catalyst containing kaolin home position crystallization and Y type molecular sieve and its preparing method, the preparing step is firstly baking kaolin under the temperature 1000-1400 Celsius, then mixing with inoculating seed molecular sieve, adhesive, structure addition agent and water, then extruding, further processing quadratic baking under the temperature 600-900 Celsius after forming, then hydrothermal crystallizing according to the NaY molecular sieve or ZSM-5 molecular sieve synthesis condition, the catalyst product is obtained by modifying treating crystallization product. The catalyst prepared by the invention has ZSM-5 and Y molecular sieves at the same time, the molecular sieve has a high content, high activity and stability.

Description

technical field [0001] The invention relates to a fixed-bed catalyst and a preparation method thereof. Specifically, the invention provides a method for synthesizing a fixed-bed catalyst containing ZSM-5 molecular sieve and Y-type molecular sieve through in-situ crystallization with kaolin as the main raw material. Background technique [0002] Fixed-bed catalysts containing molecular sieves are generally synthesized and modified first, and then the molecular sieves are combined with a carrier with or without a binder, and then shaped to obtain a finished catalyst. Catalysts containing Y-type molecular sieves or ZSM-5 molecular sieves are no exception. The catalyst prepared by this method cannot give full play to its catalytic performance, mainly because the active component molecular sieve and its carrier are mechanically mixed, the molecular sieve exists in various parts of the catalyst bulk phase, rather than highly dispersed on the catalyst surface, and the utilization r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80
Inventor 张瑞驰李庆杰郭金宝
Owner 广西北海惠尔能源科技有限公司
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