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Method for preparing di-cyclopentadione and methyl cyclopentadiene by carbon 10, carbon 10 distillation

A technology of methylcyclopentadiene and crude methylcyclopentadiene, which is applied in the field of preparation of dicyclopentadiene and methylcyclopentadiene, can solve problems such as waste, and achieve the effect of low production cost

Inactive Publication Date: 2006-10-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cyclopentadiene (or dicyclopentadiene) and methyl cyclopentadiene present in carbon nine and carbon ten fractions are rarely used effectively, which is obviously very wasteful in today's increasingly scarce oil resources

Method used

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  • Method for preparing di-cyclopentadione and methyl cyclopentadiene by carbon 10, carbon 10 distillation
  • Method for preparing di-cyclopentadione and methyl cyclopentadiene by carbon 10, carbon 10 distillation
  • Method for preparing di-cyclopentadione and methyl cyclopentadiene by carbon 10, carbon 10 distillation

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Embodiment 1～10

[0023] 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 dimerization reactor 4 is a tubular reactor. The main process conditions of each embodiment cracking rectification unit, methylcyclopentadiene product refining rectification tower and dimerization reactor are shown in Tables 1, 2 and 3, and the product dicyclopentadiene and refined methylcyclopentadiene The yield and purity are shown in Table 4. in:

[0024]

[0025]

[0026]

crac...

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Abstract

This invention relates to use carbon nine and carbon ten cut fraction making dicyclopentadiene and methyl cyclopentadiene method. It includes material cracking, cracking temperature is 160-230 degrees centigrade, system pressure is 0-0.4MPa, and stay time of materials is 1-5 hours. Gas phase material generated in cracking process is directly refined, rectification tower roof temperature is 40-70 degrees centigrade, system pressure is 0-0.4MPa, Fine cyclopentadiene product is got at tower roof, crude methyl cyclopentadiene material is got at lateral line at temperature 60-80 degrees centigrade, dicyclopentadiene is got by dimerization reaction of cyclopentadiene made in process 2, reaction temperature is 45-130 degrees centigrade, pressure is 0-0.2MPa. The crude methyl cyclopentadiene material is refined, rectification tower roof temperature is 40-56 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 method for preparing dicyclopentadiene and methylcyclopentadiene, in particular to the production of dicyclopentadiene and methylcyclopentadiene 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): C07C13/15C07C2/02C07C2/44C07C4/04C07C7/04C07C13/61
Inventor 冷志光郭世卓马洪玺郑重胡春秀
Owner CHINA PETROLEUM & CHEM CORP
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