Method for extracting methyl cyclopentadiene from ethylene cracked C9 heavy fractions

A technology of methylcyclopentadiene and methylcyclopentadiene dimer, which is applied in the field of extraction of methylcyclopentadiene, can solve problems such as the basic composition of unpublished raw materials, and achieve a high comprehensive utilization rate, The effect of reducing production energy consumption and improving economic benefits

Active Publication Date: 2011-04-13
HENGHE MATERIALS & SCI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN200910054719.2 introduces a method for extracting methylcyclopentadiene from heavy components separated before hydrogenation of gasoline, but the basic composition of the raw materials used is not disclosed in the patent

Method used

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  • Method for extracting methyl cyclopentadiene from ethylene cracked C9 heavy fractions
  • Method for extracting methyl cyclopentadiene from ethylene cracked C9 heavy fractions
  • Method for extracting methyl cyclopentadiene from ethylene cracked C9 heavy fractions

Examples

Experimental program
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Effect test

Embodiment 1

[0043] The raw material F1 comes from the heavy fraction oil separated by cracking C9. It is preheated to 190°C and then enters the depolymerization reactor R1. The depolymerization temperature is 220°C, the system operating pressure is 0.1MPa, and the material residence time is 3 hours. The depolymerization produces The gas phase material directly enters the rectification tower T1 for rectification, and the depolymerized residual material F3 enters the coumarone thermal polymerization device, and the softening point of the coumarone resin after polymerization is 120°C;

[0044] The top temperature of the rectification tower T1 is 70°C, the temperature of the tower bottom is 200°C, the operating pressure of the system is 0.08MPa, and the reflux ratio is 3. The mixture of crude cyclopentadiene and crude methylcyclopentadiene obtained from the top of the tower F4 is sent to the refinery. Distillation tower T2, the residual material in the tower tank is returned to the depolymeriz...

Embodiment 2

[0047] The raw material F1 comes from the heavy fraction oil separated by cracking C9. It is preheated to 190°C and then enters the depolymerization reactor R1. The depolymerization temperature is 240°C, the system operating pressure is 0.1MPa, and the material residence time is 3 hours. The depolymerization produces The gas phase material directly enters the rectification tower T1 for rectification, and the depolymerization residual material F3 enters the coumarone thermal polymerization device, and the softening point of the coumarone resin after polymerization is 127°C;

[0048] The top temperature of the rectification tower T1 is 65°C, the temperature of the tower bottom is 200°C, the operating pressure of the system is 0.05MPa, and the reflux ratio is 3. The mixture of crude cyclopentadiene and crude methylcyclopentadiene obtained from the top of the tower F4 is sent to the refining Distillation tower T2, the residual material in the tower tank is returned to the depolymer...

Embodiment 3

[0051] The raw material F1 comes from the heavy fraction oil separated by pyrolysis of carbon nine. It is preheated to 185°C and then enters the depolymerization reactor R1. The depolymerization temperature is 250°C, the system operating pressure is 0.1MPa, and the material residence time is 3 hours. The gas phase material directly enters the rectification tower T1 for rectification, and the depolymerization residual material F3 enters the coumarone thermal polymerization device, and the softening point of the coumarone resin after polymerization is 115 ° C;

[0052] The top temperature of the rectification tower T1 is 70°C, the temperature of the tower bottom is 220°C, the operating pressure of the system is 0.05MPa, and the reflux ratio is 3. The mixture of crude cyclopentadiene and crude methylcyclopentadiene obtained from the top of the tower F4 is sent to the refining Distillation tower T2, the residual material in the tower tank is returned to the depolymerization system....

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Abstract

The invention relates to a method for extracting methyl cyclopentadiene from ethylene cracked C9 heavy fractions, which comprises the following steps of: (1) preheating C9 heavy fractions serving as a raw material and conveying to a depolymerizing reactor; (2) performing depolymerization reaction on the raw material; (3) adding a gas-phase material generated by depolymerization into a rectifying column T1; (4) adding a mixture of coarse cyclopentadiene and coarse methyl cyclopentadiene generated in the step (3) into a rectifying column T2 for further rectifying; (5) adding the residual material in the depolymerizing reactor into a coumarone resin reaction kettle to generate coumarone resin; (6) performing dimerization on the cyclopentadiene material to obtain dicyclopentadiene; (7) performing dimerization on the methyl cyclopentadiene material to obtain methyl cyclopentadiene dimer; and (8) adding the methyl cyclopentadiene dimer into a rectifying column T3, rectifying under reduced pressure, and removing light fractions on the tower top and heavy fractions at the tower bottom to obtain the methyl cyclopentadiene dimer on a side line. The method is simple and suitable for industrial application; and the purity of a product is not less than 98 percent.

Description

technical field [0001] The invention belongs to the field of extraction methods of methylcyclopentadiene, in particular to a method for extracting methylcyclopentadiene from ethylene cracking carbon nine-heavy fraction. Background technique [0002] Use and source of methylcyclopentadiene: Methylcyclopentadiene dimer (Methylcyclopentadiene) is a basic chemical raw material, its appearance is a colorless liquid, and the boiling point of methylcyclopentadiene is 200°C. Melting point -51°C (95%), refractive index 1.4520, flash point 26°C, relative density 0.941, easily soluble in ethanol, ether and benzene, insoluble in water, toxicity similar to benzene poisoning effect. [0003] Methylcyclopentadiene, as a basic chemical raw material with a wide range of uses, is mainly used to prepare epoxy resin curing agent methylnadic anhydride (MNA). Another important use is to synthesize methylcyclopentadiene manganese tricarbonyl ( MMT). At present, many countries in the world use MM...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C13/15C07C13/61C07C4/22C07C7/04C08F244/00
Inventor 孙向东李海涛王斌
Owner HENGHE MATERIALS & SCI TECH CO LTD
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