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Method for Cracking C_4 and preparing olefin by refinery C_4

A technology for refining carbon 4 and cracking carbon, which is applied in the field of producing ethylene and propylene, can solve the problems such as insufficient and effective utilization of carbon 4 resources, and achieve the effects of reducing production costs, increasing economic benefits and large economic benefits.

Active Publication Date: 2010-09-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] In order to solve the problem that the existing C4 resources have not been fully and effectively utilized, the present invention proposes a method for producing ethylene and propylene by making full use of cracked C4 and refinery C4 resources

Method used

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  • Method for Cracking C_4 and preparing olefin by refinery C_4
  • Method for Cracking C_4 and preparing olefin by refinery C_4

Examples

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Embodiment 1

[0040] Reference attached figure 1 The method of the present invention will be described.

[0041] Taking a 720,000-ton / year ethylene unit as an example, using the original unit, before adding C4 in the refinery, the raw material flow rate of naphtha used was 82575000kg / h (660,600 tons / year), and other cracking raw materials were 220000kg / h ( 1.76 million tons / year), 90,100kg / h ethylene (720,000 tons / year), 44,530kg / h propylene (356,000 tons / year), 16,240kg / h butadiene (130,000 tons / year), and 8,250kg / h isobutylene (66,000 tons / year).

[0042] After adopting the method of the present invention, add the naphtha of 76000kg / h (608,000 tons / year) and other cracking raw materials of 220000kg / h (1,760,000 tons / year) to enter the steam thermal cracking furnace, and the temperature produced after the cracking is Cracked gas at 820°C and pressure 0.15MPa is mixed with catalytic cracked gas from olefin catalytic cracking reactor and then enters the quenching system. The mixed cracked...

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Abstract

The invention discloses a method for preparing olefin by cleavage C4 and refinery C4, relating to a technical field for preparing ethylene and propone. For solving the problem that the C4-fraction is not be fully and efficiently utilized, the invention provides a method for preparing ethylene and propone by using cleavage C4 and refinery C4 as raw materials and using ethylene equipment, in the processes of predissociation of refinery C4, olefin catalytic cracking, steam thermal cracking, butadiene extraction, etherification, and butane extraction. The invention fully utilizes kinds of C4 resources, to separate the normal alkane and olefin in C4 fraction by the extraction and rectification technology, to convert the olefin in C4 into propone and ethylene by olefin catalytic cracking, to convert the alkane in C4 into propone and ethylene by steam thermal cracking. In this way, supplementing with each other, C4 can obtain a effective converse, and the output quantity of propone and isobutene can be increased to get a maximum economic benefit.

Description

technical field [0001] The present invention relates to a method for preparing ethylene and propylene, in particular, the present invention relates to a method for preparing ethylene and propylene by cracking C4 and refinery C4 as raw materials. Background technique [0002] With the improvement of my country's ethylene production and crude oil processing capacity, a large amount of C4 hydrocarbons are produced by steam cracking units and catalytic cracking units. ) is also in urgent need of finding new chemical utilization pathways. The production of ethylene and propylene from a large amount of surplus and cheap C4 hydrocarbons is an important way to combine oil and chemical industry and efficiently utilize C4 resources, which can bring significant economic benefits to petrochemical enterprises. [0003] Conventional ethylene units generally use naphtha or light hydrocarbons as cracking raw materials to obtain cracked gas through steam thermal cracking, and then enter the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C4/06C07C11/02
Inventor 程建民廖丽华王定博李东风张勇吴长江戴伟刘智信陈硕侯经纬
Owner CHINA PETROLEUM & CHEM CORP