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Catalyst for preparing olefin with arene as side product by hydrocarbon catalytic cracking, preparing method and uses thereof

A catalytic cracking and catalyst technology, applied in catalytic cracking, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve problems such as high reaction temperature and difficult separation and recovery

Inactive Publication Date: 2006-02-15
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

U.S. Patent No. 3,767,567 combines CaO, any one of SrO and BaO oxides with Al 2 o 3 As a catalyst for catalytic cracking of naphtha, the reaction temperature is relatively high, and while ethylene and propylene are obtained, a large amount of dry gas, CO and CO are produced 2 , which brings difficulties to the separation and recovery of products
In the transition metal oxide system, Cr reported in Japanese Patent Publication No. 48-45364 2 o 3 / Al 2 o 3 It has a certain effect on naphtha cracking, and there is no aromatic hydrocarbon in the product, but it will produce a large amount of CO and CO 2

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: the preparation of catalyst 1

[0025] ZSM-5 molecular sieve raw powder (pore size 0.51×0.55 nanometer, 0.53×0.56 nanometer) raw powder (SiO 2 / Al 2 o 3 =70) with silica sol and aluminum sol (amorphous silicon aluminum SiO 2 / Al 2 o 3 =3) mixing and forming, after drying, roasting at high temperature to remove the template agent, and crushing into 20-40 mesh molecular sieve matrix particles, the molecular sieve content in the matrix is ​​85%. The matrix particles are exchanged with ammonium nitrate solution at 80°C, and then calcined at 550°C to obtain H-type molecular sieve matrix particles. Matrix exchange modified component H for molecular sieves 3 PO 4 The solution was dried and calcined to prepare a catalyst, and the P content was determined to be 4.2wt% by X-ray fluorescence spectrometry.

Embodiment 2

[0026] Embodiment 2: the preparation of catalyst 2

[0027] ZSM-5 molecular sieve raw powder (SiO 2 / Al 2 o 3 =45) and silica sol (containing 25wt% SiO 2 ) mixed and molded, after drying, the template agent is removed by roasting at high temperature, and crushed into 20-40 mesh molecular sieve matrix particles, the molecular sieve content in the matrix is ​​80%. The matrix particles are exchanged with ammonium nitrate solution at 80°C, and then calcined at 550°C to obtain H-type molecular sieve matrix particles. For molecular sieve matrix exchange modified components La(NO 3 ) 3 and H 3 PO 4 The solution is dried and calcined to prepare a catalyst, and the P content is 4.5wt% and the La content is 7.4wt% as determined by X-ray fluorescence spectroscopy.

Embodiment 3

[0028] Embodiment 3: the preparation of catalyst 3

[0029] ZSM-5 molecular sieve raw powder (SiO 2 / Al 2 o 3 =86) and silica sol (containing 25wt% SiO 2 ) mixed and molded, after drying, the template agent is removed by roasting at high temperature, and crushed into 20-40 mesh molecular sieve matrix particles, the molecular sieve content in the matrix is ​​80%. The matrix particles are exchanged with ammonium nitrate solution at 80°C, and then calcined at 550°C to obtain H-type molecular sieve matrix particles. For molecular sieve matrix exchange modified components La(NO 3 ) 3 and H 3 PO 4 and Li(NO 3 ) 3 The solution was dried and calcined to prepare a catalyst. The content of P was 1.7wt%, the content of La was 7.5wt%, and the content of Li was 0.8wt% as determined by X-ray fluorescence spectroscopy.

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Abstract

A catalyst for preparing lower carbon number hydrocarbons and parallel aromatic hydrocarbons through catalytic hydrocarbon pyrolysis, comprises molecular sieve with bore diameter of 0.45-0.7 nm, nonshaped-set oxide compound and at least two modified elements from phosphor, alkaline-earth metal, lithium and tombarthite. Its preparing process comprises, (1) preparing catalyst base material from crystallization shaped molecular sieve and silicon or aluminum containing amorphous substance or aperture structure modifier through mixing modeling, (2) preparing type-H catalyst base material through sintering, (3) soaking or exchanging catalyst base material by one or more modifying solution through one-step or multistep mode, and drying and sintering for preparation of catalyst.

Description

technical field [0001] The invention relates to a catalyst for the catalytic cracking of hydrocarbons to produce light olefins and co-produce aromatics. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. [0003] The present invention also relates to the application of the above-mentioned catalyst in catalytic cracking of hydrocarbons. Background technique [0004] Cracking is an important means to produce gasoline and low-carbon olefins from the heavy components of petroleum. About 50% of gasoline is produced in the catalytic cracking process. For the production of ethylene and propylene, it has been difficult to develop a perfect catalytic cracking process. , the thermal cracking of naphtha is still in a dominant position. Compared with the conditions for catalytic cracking to produce gasoline, due to thermodynamic reasons, obtaining low-carbon olefins as cracked products often requires a high temperature of more than 800°...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/40B01J27/18B01J37/00C10G11/05
Inventor 魏迎旭刘中民王公慰张新志胡杰杨继刚王华许磊齐越
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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