Method for producing olefin

A production method and olefin technology, applied in the field of olefin production, can solve the problems of complex process, easy coking of cracking furnace tubes, poor high temperature resistance of coatings, etc.
CN102899065BActive Publication Date: 2015-03-11CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2015-03-11

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Abstract

he invention provides a method for producing olefin. The method comprises step of placing cracking raw materials in a cracking furnace tube for cracking, so as to obtain the olefin. The cracking furnace tube comprises a cracking furnace tube matrix, and an inert coating attached to an inner wall of the cracking furnace tube matrix. The inert coating can prevent contact between coke and cracking furnace tube matrix, but does not react with the cracking raw materials and / or cracking products; the inert coating has a porous structure with average pore radius of 0.5-15nm, and specific surface area from 1m<2> / g to less than 150m<2> / g; the inert coating can also catalyze reaction between coke and water vapor; or the inert coating surface is attached by an active catalytic layer capable of catalyzing reaction between coke and water vapor; or the inert coating can catalyze reaction between coke and water vapor, and is also attached by an active catalytic layer capable of catalyzing reaction between coke and water vapor. The method for producing olefin provided by the invention has simple operation and good anti-coking performance.
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Description

technical field

[0001] The present invention relates to a method for producing olefins. Background technique

[0002] Ethylene is one of the most important basic raw materials in the petrochemical industry. At present, the method of producing ethylene is mainly based on tube furnace cracking technology, which has been widely used in the world. However, in the production process of ethylene, the problems of coking and carburization will inevitably occur, thereby reducing the inner diameter of the furnace tube of the cracking furnace, increasing the pressure drop in the tube, hindering the normal progress of the cracking reaction, and affecting the yield of ethylene. Reduced production efficiency. In addition, the high temperature of the cracking can easily promote the carburization of the inner wall of the furnace tube of the cracking furnace, that is, the chemical reaction between the carbon deposit and the base material of the furnace tube will lead to the weakening of th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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