Method of utilizing cracked, C5 fraction

A technology for cracking carbon and fractions, which is applied in the fields of hydrocarbon cracking to hydrocarbon production, hydrogenation to hydrocarbon production, organic chemistry, etc., to achieve the effect of saving hydrogen

Active Publication Date: 2008-12-10
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the conversion of olefins uses C4 fractions, and rarely uses cracked C5 fractions as raw materials

Method used

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  • Method of utilizing cracked, C5 fraction
  • Method of utilizing cracked, C5 fraction
  • Method of utilizing cracked, C5 fraction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] (1) Using cracked C5 fraction of Yanshan Petrochemical as raw material, its composition is shown in Table 1 below, and the contents in Table 1 are in weight percent. The above-mentioned materials are sent to a dimerization reactor for dimerization reaction. The dimerization reaction temperature is 80° C., the reaction pressure is 0.5 MPa, and the residence time is 60 minutes.

[0062] (2) The material that the dimerization reactor comes out is sent into the de-dicyclopentadiene tower, extracts the main material of dicyclopentadiene at the tower still, and steams the cracked carbon five fraction b of removing dicyclopentadiene at the top of the tower ; The theoretical plate number of the debicyclopentadiene tower is 20, the reflux ratio is 1, the pressure at the top of the tower is 0.08MPa, the pressure at the bottom of the tower is 0.10MPa, the temperature at the top of the tower is 30°C, the temperature at the bottom of the tower is 95°C, and the feed The location is o...

Embodiment 2

[0070] Dimerization, dedicyclopentadiene removal, selective hydrogenation and olefin conversion in this example are the same as in Example 1, except that no etherification step is included. In the olefin conversion step, based on the cracked C5 fraction, the yield of conversion to ethylene is 11%, and the yield of conversion to propylene is 22%.

Embodiment 3

[0072] This example is basically the same as Example 1, the difference is that after the conversion of olefins, the C5 material is separated by ordinary rectification method and then fully hydrogenated. The catalyst is the Chinese patent ZL02104202.0 of Beijing Research Institute of Chemical Industry For the catalyst of Example 1, the reaction temperature is 60°C, the reaction pressure is 1.0MPa, the molar ratio of hydrogen to olefin is 1.5:1, and the liquid volume space velocity is 1.0h -1 . The fully hydrogenated feed contained 95% by weight of n-pentane.

[0073] Table 1

[0074]

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Abstract

The method of utilizing cracked C5 fraction includes the first dimerizing cyclopentadiene in the cracked C5 fraction into dicyclopentadiene, separating dicyclopentadiene, selectively hydrogenating diene in the residual material into monoene and directly converting olefine to produce ethylene and propylene. The method may have etherification reaction before or after olefine conversion to produce methyl tert-amyl ether product and high purity isoamylene product further. The method may include a full hydrogenation process to produce pentane, which may be used as cracked material in a main cracking furnace or separated into n-pentane produce and isopentane product. The method is flexible and practical.

Description

technical field [0001] The invention relates to a method for comprehensively utilizing cracked C5 fractions, in particular, the invention relates to a method for comprehensively utilizing cracked C5 fractions to produce ethylene and propylene. Background technique [0002] About 15-20% of carbon five fractions are by-produced in the process of petroleum cracking to ethylene. With the continuous expansion of ethylene plants and the continuous improvement of production capacity, the by-product cracked carbon five fractions are also increasing. As of 2004, my country's cracked carbon five fractions are about 800,000 tons per year. Therefore, how to comprehensively and effectively utilize this fraction is a common concern of various petroleum and petrochemical enterprises today. And as the benefit improvement space of ethylene plants gradually shrinks, all enterprises are also forced to turn their attention to the comprehensive utilization of this part of the distillate, rather...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/04C07C11/06C07C9/18C07C4/02C07C5/03
Inventor 戴伟田保亮冯海强王定博胡竞民杨志钢
Owner CHINA PETROLEUM & CHEM CORP
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