Method for increasing production of propylene and ethylene

A technology for ethylene and propylene, applied in the field of increasing production of propylene and ethylene, can solve the problems of high processing cost, difficulty in effective separation, and difficulty in ensuring the purity of separated fractions, and achieves the effects of increasing output and increasing economic benefits

Inactive Publication Date: 2011-12-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the boiling point of each fraction in the C4 fraction of the refinery is very similar, the relative volatility of some fractions is very small, and it is difficult to effectively separate it by simple distillation; The energy cons

Method used

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Embodiment 1

[0038] Adopt the method for increasing production of propylene and ethylene of the present invention, on the basis of comparative example 1, increase refinery C4 (composition as shown in table 3) catalytic cracking system, take refinery C4 alkane and olefin mixture as raw material, increase production steam The propylene and ethylene of the cracking unit, among which the processing capacity of C4 in the refinery is 100,000 tons / year. Refinery C4 catalytic cracking system includes refinery C4 catalytic cracking unit, mixed olefin and alkane catalytic cracking unit, mixed olefin and alkane oxidative cracking unit and separation unit.

[0039] Table 3 Main components of refinery C4 fraction

[0040] components

Isobutane

n-butane

Isobutylene

1-butene

2-Butene

Contentwt%

34

10

15

13

28

[0041] The specific method is as follows:

[0042] (1) First, feed the C4 olefins and alkane mixture raw materials in the...

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Abstract

The invention relates to a method for increasing the output of propylene and ethylene in a steam cracking process. The steam cracking process consists of a cracking furnace and a separation system. On this basis, a catalytic cracking system that uses the C4 fraction produced in the oil refining process as a raw material is added. Through this catalytic cracking system, the mixture of C4 olefins and alkanes is partially converted into propylene-rich And the cracked gas of ethylene, and the separation and purification of the target product is mainly completed by the separation system in the steam cracking process. The feature of the present invention is to fully tap the potential of the separation (recovery) system in steam cracking, only increase the catalytic cracking system composed of catalytic cracking reactor, oxidation cracking reactor and simple separation equipment, and increase low-carbon components such as propylene and ethylene. The output of olefins is conducive to the improvement of the economic benefits of enterprises.

Description

technical field [0001] The invention relates to a method for increasing the production of propylene and ethylene, more specifically, the invention relates to a method for increasing the production of propylene and ethylene by using the existing steam cracking ethylene production device and separation device. Background technique [0002] At present, the main production method of low-carbon olefins such as ethylene and propylene in the world is steam cracking / thermal cracking. The steam cracking process consists of two parts: a cracking furnace and a separation (recovery) system. In the steam cracking process, the mixture of cracking raw materials and steam is heated to a high temperature in the cracking furnace for thermal cracking reaction to generate cracked gas rich in ethylene and propylene, and then the cracked gas is sent to the separation (recovery) system for Separation and purification to obtain cracking products such as ethylene and propylene. [0003] In recent y...

Claims

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Application Information

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IPC IPC(8): C07C11/06C07C11/04C07C4/06
CPCY02P20/52
Inventor 白杰付啸刘小波周丛郭敬杭王国清
Owner CHINA PETROLEUM & CHEM CORP
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