Method for preparing cyclo pentadiene and methyl cyclopentadiene by carbon 9 and carbon 10 distillation

A technology for methylcyclopentadiene and crude methylcyclopentadiene is applied in the field of pyrolysis and rectification to produce cyclopentadiene and methylcyclopentadiene, which can solve the problem of wasting, methylcyclopentadiene is very Less effective utilization and other issues, to achieve the effect of low production cost

Inactive Publication Date: 2006-10-25
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, cyclopentadiene and methylcyclopentadiene present in the carbon nine and carbon ten fractions are seldom used effectively. In today's increasingly scarce oil resources, this is obviously very wasteful

Method used

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  • Method for preparing cyclo pentadiene and methyl cyclopentadiene by carbon 9 and carbon 10 distillation
  • Method for preparing cyclo pentadiene and methyl cyclopentadiene by carbon 9 and carbon 10 distillation
  • Method for preparing cyclo pentadiene and methyl cyclopentadiene by carbon 9 and carbon 10 distillation

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Embodiment 1～10

[0020] The flow chart of each embodiment is shown in the accompanying drawings. The volume of the cracking kettle 1 is 50 liters, and the rectifying tower 2 is a sieve tray tower with 25 theoretical plates. The feed rate of raw material M1 and the discharge rate of cracking raffinate M3 are controlled to obtain the required cracking residence time. The rectifying column 3 is a sieve tray column with 30 theoretical plates. The outlet for obtaining the crude methylcyclopentadiene material from the side line is located at a temperature of 62-70°C in the rectifying section. The main process conditions of each embodiment cracking rectification device and methylcyclopentadiene product refining rectification tower are shown in Tables 1 and 2, and the yield and purity of product refined cyclopentadiene and refined methylcyclopentadiene are shown in Table 1. Table 2. in:

[0021]

[0022]

[0023]

cracking temperature

(℃)

cleavage stay

t...

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Abstract

This invention relates to use carbon nine and carbon ten cut fraction making cyclopentadiene and methyl cyclopentadiene method. It includes 1) material cracking, cracking temperature is 160-230 degrees centigrade, system pressure is 0-0.3MPa, materials stay time is 1-5 hours. 2) Gas phase material generated in cracking process is directly refined, rectification tower roof temperature is 38-60 degrees centigrade, system pressure is 0-0.3MPa, reflux ratio is 0-4. Fine cyclopentadiene product is got at tower roof; crude methyl cyclopentadiene material is got at lateral line at temperature 60-80 degrees centigrade, tower tank material backs to cracking system. 3) The crude methyl cyclopentadiene material is refined, rectification tower roof temperature is 40-55 degrees centigrade, tower tank temperature is 90-120 degrees centigrade, system pressure is 0-0.2MPa, and reflux ratio is 4-10. Fine methyl cyclopentadiene product is got at tower bottom, and light component substance is discharged from tower roof.

Description

technical field [0001] The present invention relates to a preparation method of cyclopentadiene and methyl cyclopentadiene, in particular to the preparation of cyclopentadiene and methyl cyclopentadiene by cracking and rectifying the C9 and C10 fractions produced by the ethylene by-product from petroleum cracking. The method of cyclopentadiene. Background technique [0002] The cracked raw material obtained from petroleum cracking to ethylene is separated from light fractions below carbon 8 to obtain a considerable amount of raffinate fractions, which are called carbon 9 and carbon 10 fractions. Hydrogen device. Due to the complex composition of this material, it contains more than 100 components, such as dicyclopentadiene, methylcyclopentadiene dimer, dimer of cyclopentadiene and methylcyclopentadiene, carbon nine aromatic hydrocarbons, Indenes, naphthalenes, etc. It is very difficult to separate these substances from each other, so there are few reports on the effective...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C13/15C07C4/04
Inventor 冷志光郭世卓马洪玺胡国君黄勇
Owner CHINA PETROLEUM & CHEM CORP
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