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Method for preparing methylcyclopentadiene dimer from cracked C9 fraction

A technology of methylcyclopentadiene dimer and methylcyclopentadiene, which is applied in the field of preparation of methylcyclopentadiene dimer, can solve the problems of corrosive damage to distillation towers, coking blockage of distillation towers, and single-pass production. Reduce the efficiency and other problems, to achieve the effect of prolonging the service life, high-efficiency production, safe and feasible method

Inactive Publication Date: 2019-12-13
广东新华粤石化集团股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this will lead to a reduction in the yield per pass; at the same time, there are still coking and clogging inside the distillation tower during the production process, which will cause corrosive damage to the distillation tower

Method used

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  • Method for preparing methylcyclopentadiene dimer from cracked C9 fraction
  • Method for preparing methylcyclopentadiene dimer from cracked C9 fraction
  • Method for preparing methylcyclopentadiene dimer from cracked C9 fraction

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Embodiment 1

[0071] Embodiment 1 of the present invention provides a kind of method for preparing methylcyclopentadiene dimer from cracking carbon nine cuts, described method for preparing methylcyclopentadiene dimer from cracking carbon nine cuts comprises The following steps:

[0072] (1) The fraction of cracked carbon nine is input into the rectification tower T1 at 7.5t / h, the pressure of the rectification tower T1 is controlled to be 9Kpa, the temperature at the bottom of the tower is 140-150°C, the temperature of the side line is 120-130°C, and the top of the tower is The temperature is 80-90°C, and the reflux ratio is controlled to be 0.8:1; the side line is 890Kg / h rich in C 11 h 14 (The dimer of cyclopentadiene and methylcyclopentadiene) and the material of methylcyclopentadiene dimer, this material and inert solvent enter in the reactor R1 through pre-heater E1 and carry out cracking, cracking stops The time is 5s, the temperature of the pre-heater E1 is controlled to be 170-18...

Embodiment 2

[0081] Embodiment 2 of the present invention provides a kind of method for preparing methylcyclopentadiene dimer from cracking carbon nine cuts, described method for preparing methylcyclopentadiene dimer from cracking carbon nine cuts comprises The following steps:

[0082] (1) The fraction of cracked carbon nine is input into the rectification tower T1 at 8.5t / h, the pressure of the rectification tower T1 is controlled at 11Kpa, the temperature at the bottom of the tower is 140-150°C, and the temperature of the side line is 120-130°C. The temperature is 100~110℃, and the reflux ratio is controlled to be 1.3:1; the side line can get 870Kg / h rich in C 11 h 14 (The dimer of cyclopentadiene and methylcyclopentadiene) and the material of methylcyclopentadiene dimer, this material and inert solvent enter in the reactor R1 through pre-heater E1 and carry out cracking, cracking stops The time is 10s, the temperature of the pre-heater E1 is controlled to be 180-190°C, and the temper...

Embodiment 3

[0091]Embodiment 3 of the present invention provides a kind of method for preparing methylcyclopentadiene dimer from cracking carbon nine cuts, described method for preparing methylcyclopentadiene dimer from cracking carbon nine cuts comprises The following steps:

[0092] (1) The fraction of cracked carbon nine is input to the rectification tower T1 at 8t / h, the pressure of the rectification tower T1 is controlled to be 10Kpa, the temperature at the bottom of the tower is 140-150°C, the temperature of the side line is 120-130°C, and the temperature at the top of the tower is The temperature is 90~100℃, and the reflux ratio is controlled to be 1:1; the side line can get 880Kg / h rich in C 11 h 14 (The dimer of cyclopentadiene and methylcyclopentadiene) and the material of methylcyclopentadiene dimer, this material and inert solvent enter in the reactor R1 through pre-heater E1 and carry out cracking, cracking stops The time is 8s, the temperature of the pre-heater E1 is contr...

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Abstract

The invention relates to the field of preparation of methylcyclopentadiene dimmers, and concretely relates to a method for preparing a methylcyclopentadiene dimer from a cracked C9 fraction. The method for preparing the methylcyclopentadiene dimer from the cracked C9 fraction comprises the following steps: (1) the cracked C9 fraction is input into a rectifying tower T1, a material extracted from alateral line and an inert solvent go through a preheater E1, then enter a reactor R1 and are cracked; (2) a cracked material obtained in step (1) is quenched by a condenser E2, then enters a rectifying tower T2, and is rectified to obtain gaseous cyclopentadiene and methylcyclopentadiene at the tower top; (3) the tower top materials obtained in step (2) are input into a rectifying tower T3, and liquid-phase methylcyclopentadiene is extracted from the lateral line; (4) the lateral line extracted material obtained in step (3) enters a dimerization reaction kettle R2, and undergoes a dimerization reaction; and (5) the methylcyclopentadiene dimer reaction product obtained in step (4) enters a T4 rectifying tower, and is purified to obtain the high-purity methylcyclopentadiene dimer.

Description

technical field [0001] The invention relates to the field of preparation of methylcyclopentadiene dimer, more specifically, the invention relates to a method for preparing methylcyclopentadiene dimer from cracking carbon nine fractions. Background technique [0002] Methylcyclopentadiene dimer, abbreviated as DMCPD, is pyrolyzed into methylcyclopentadiene monomer (abbreviated as MCPD). It is an important fine chemical product with a wide range of uses. On the one hand, it is the key raw material for the synthesis of gasoline antiknock agent - methylcyclopentadienyl manganese tricarbonyl (referred to as MMT). On the other hand, it can be used to synthesize high-performance electronic packaging materials - methyl endomethylene tetrahydrophthalic anhydride (referred to as MNA). In addition, it is also used in the synthesis of organometallic compound derivatives such as CP 2 TiCl 2 , high-grade flavors and fragrances and reactive flame retardants, etc., and the scope of use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/50C07C13/61
CPCC07C2/50C07C2603/68C07C13/61
Inventor 左洪亮梁国强杨圣儒陈炳琳刘阳林茂生吴声晓黄杰谭庆
Owner 广东新华粤石化集团股份公司
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