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Method for preparing methyl cyclopentadiene by carbon 9, carbon 10 distillation

A technology of methylcyclopentadiene and crude methylcyclopentadiene, which is applied in the field of preparation of methylcyclopentadiene, can solve the problem that cyclopentadiene is seldom used effectively, and achieve low production costs Effect

Inactive Publication Date: 2006-10-25
SINOPEC SHANGHAI PETROCHEMICAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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  • Method for preparing methyl cyclopentadiene by carbon 9, carbon 10 distillation
  • Method for preparing methyl cyclopentadiene by carbon 9, carbon 10 distillation

Examples

Experimental program
Comparison scheme
Effect test

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 the pyrolysis rectification device and the product refining rectification tower of each embodiment are shown in Table 1 and 2 respectively, and the yield and purity of the product refined methylcyclopentadiene are shown in Table 2. in:

[0021]

[0022]

cracking temperature

(℃)

cleavage stay

time

(hr)

Distillation tower top...

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Abstract

This invention relates to use carbon nine and carbon ten cut fraction making methyl cyclopentadiene method. The carbon nine and ten is by-product of oil cracking.It includes 1) material cracking, cracking temperature is 170-220 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 40-65 degrees centigrade, system pressure is 0-0.3MPa, reflux ratio is 1-5. Light component material is discharged 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 40-62 degrees centigrade, tower tank temperature is 90-120 degrees centigrade, system pressure is 0-0.2MPa, and reflux ratio is 3-8. Fine methyl cyclopentadiene product is got at tower bottom, and light component substance is discharged from tower roof.

Description

technical field [0001] The invention relates to a method for preparing methylcyclopentadiene, in particular to a method for preparing methylcyclopentadiene by cracking and rectifying the C9 and C10 fractions produced by petroleum cracking to produce ethylene. 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 use of this material so far, and it is mostly used as fuel in industry. This not only ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C13/15C07C4/04
Inventor 马洪玺冷志光黄勇陆徐国郑重
Owner SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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