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Production of low-carbon olefine and arene

A technology for low-carbon olefins and aromatics, applied in the field of catalytic conversion, can solve the problems of moving reforming catalysts, complex regeneration process, inability to produce low-carbon olefins and aromatics at the same time, and low propylene yield, etc.

Active Publication Date: 2007-01-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the movement and regeneration process of the reforming catalyst is also relatively complicated
[0010] Some of the above-mentioned existing technologies only produce propylene by-product while producing gasoline and diesel oil, and the yield of propylene is on the low side, not more than 30% by weight. Some of them can only produce aromatics, but they cannot produce low-carbon olefins and aromatics at the same time.

Method used

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  • Production of low-carbon olefine and arene
  • Production of low-carbon olefine and arene
  • Production of low-carbon olefine and arene

Examples

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Embodiment approach 1

[0044] A method for producing light olefins and aromatics provided by the invention comprises:

[0045] The raw material is in contact with the catalytic cracking catalyst at a temperature of 400°C-800°C and a weight hourly space velocity of 0.1h -1 -750h -1 Under the condition of reaction, the reaction is carried out in at least two reaction zones, the reaction temperature of at least one reaction zone in the reaction zone downstream of the first reaction zone is higher than the reaction temperature of the first reaction zone, and its weight hourly space velocity is lower than The weight hourly space velocity of the first reaction zone separates the raw catalyst and reaction oil gas, the raw catalyst is returned to the reactor after regeneration, and the reaction oil gas is separated to obtain the target products of low-carbon olefins and aromatics.

[0046] The method will be described in detail in five parts below.

[0047] 1. Raw materials

[0048] The raw materials in ...

Embodiment approach 2

[0082] Another method for producing light olefins and aromatics provided by the present invention includes:

[0083] (1) The raw material oil and the optional recycle material first enter the catalytic hydrogenation unit, and contact with the hydrogenation catalyst and hydrogen, at a hydrogen partial pressure of 3.0MPa-20.0MPa, a reaction temperature of 300°C-450°C, and a hydrogen-to-oil volume ratio of 300v / v-2000v / v, volumetric space velocity 0.1h -1 -3.0h -1 react under certain conditions, separate the reaction effluent to obtain hydrogenated oil, and recycle the hydrogen;

[0084] (2) The oil produced by hydrogenation is in contact with the catalytic cracking catalyst at a temperature of 400°C-800°C and a weight hourly space velocity of 0.1h -1 -750h -1 Under the condition of reaction, the reaction is carried out in at least two reaction zones, the reaction temperature of at least one reaction zone in the reaction zone downstream of the first reaction zone is higher th...

Embodiment approach 3

[0096] The third method for producing light olefins and aromatics provided by the present invention includes:

[0097] (1) The raw material oil is in contact with hydrogen gas and hydrotreating catalyst, at a hydrogen partial pressure of 3.0MPa-20.0MPa, a reaction temperature of 300°C-450°C, a hydrogen-oil volume ratio of 300v / v-2000v / v, and a volumetric space velocity of 0.1h -1 -3.0h -1 Under the condition of 2 、CH 4 , hydrogenation C 2 °-C 4 °, hydrogenated naphtha, hydrogenated products, hydrogen recycling;

[0098] (2) The hydrogenation product of step (1) is contacted with the catalytic cracking catalyst at a temperature of 400°C-800°C and a weight hourly space velocity of 0.1h -1 -750h -1 Under the condition of reaction, the reaction is carried out in at least two reaction zones, the reaction temperature of at least one reaction zone in the reaction zone downstream of the first reaction zone is higher than the reaction temperature of the first reaction zone, and i...

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Abstract

A process of production of lower olefins and aromatics involves contacting the feeds with a catalytic pyrolyzing catalyst. There are at least two reaction zones, the temperature of at least one reaction zone in the downstream of the first reaction zone is higher than that of the first one, but the weight space velocity is lower. The oil gas after reaction is separated from the catalyst, and the catalyst is recycled to the reactor after regeneration. The oil gas is separated and the required products of lower olefins and aromatics are obtained. This process can acquire maximum lower olefins such as propylene, ethylene from the heavy feeds, and the yield of the propylene exceeds 20wt. %, at the same time, aromatics such as toluene, xylene is obtained.

Description

technical field [0001] The present invention belongs to the catalytic conversion method of hydrocarbon oil in the absence of hydrogen, more specifically, it is a method for converting heavy raw materials into low-carbon olefins rich in propylene and ethylene and aromatics rich in toluene and xylene method. Background of the invention [0002] Low-carbon olefins such as ethylene and propylene are important organic chemical raw materials, among which propylene is a synthetic monomer for products such as polypropylene and acrylonitrile. With the rapid growth of demand for derivatives such as polypropylene, the demand for propylene is also increasing year by year. The demand in the world propylene market has increased from 15.2 million tons 20 years ago to 51.2 million tons in 2000, with an average annual growth rate of 6.3%. It is estimated that the demand for propylene will reach 86 million tons by 2010, with an average annual growth rate of about 5.6%. [0003] The methods...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/18C07C4/06C10G11/00
CPCY02P20/584
Inventor 龙军达志坚李大东汪燮卿舒兴田张久顺聂红谢朝钢张执刚王巍
Owner CHINA PETROLEUM & CHEM CORP
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