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Method for preparing cyclopentadiene and methylcyclopentadiene

A technology of methylcyclopentadiene and cyclopentadiene, which is applied in the fields of depolymerization, organic chemistry, distillation purification/separation, etc. Purity and high yield and other issues to achieve the effect of preventing material coking and pipeline blockage, improving purity and yield

Active Publication Date: 2017-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preparing cyclopentadiene and methylcyclopentadiene in order to overcome the defects that the existing preparation methods cannot simultaneously satisfy the high purity and high yield of cyclopentadiene and methylcyclopentadiene method

Method used

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  • Method for preparing cyclopentadiene and methylcyclopentadiene
  • Method for preparing cyclopentadiene and methylcyclopentadiene
  • Method for preparing cyclopentadiene and methylcyclopentadiene

Examples

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Effect test

Embodiment 1

[0035] This example is used to illustrate the method for preparing cyclopentadiene and methylcyclopentadiene of the present invention.

[0036] Such as figure 1 As shown, (1) carry out the first depolymerization and rectification in the first rectification tower 1 of the above-mentioned carbon nine cuts, and cool at the top of the tower at 38° C. to obtain cyclopentadiene;

[0037] (2) Pass the heavy component (the content of cyclopentadiene is 100PPM) obtained at the bottom of the tower in step (1) into the second rectification tower 2 to carry out the second depolymerization rectification, and cool at the top of the tower at 38° C. to obtain formazan Cyclopentadiene,

[0038] Wherein, the first depolymerization rectification and the second depolymerization rectification are all carried out under normal pressure, and other operating conditions are shown in Table 1 below, the purity and yield of cyclopentadiene and methylcyclopentadiene obtained Rates are shown in Table 2 be...

Embodiment 2

[0040] This example is used to illustrate the method for preparing cyclopentadiene and methylcyclopentadiene of the present invention.

[0041] Such as figure 1 As shown, (1) carry out the first depolymerization and rectification in the first rectification tower 1 of the above-mentioned carbon nine cuts, and obtain cyclopentadiene by cooling at the top of the tower at 40° C.;

[0042] (2) Pass the heavy component (the content of cyclopentadiene is 150PPM) that step (1) tower bottom obtains in the second rectification tower 2 and carry out the second depolymerization rectification, cool down at tower top 37 ℃ to obtain formazan Cyclopentadiene,

[0043]Wherein, the first depolymerization rectification and the second depolymerization rectification are all carried out under normal pressure, and other operating conditions are shown in Table 1 below, the purity and yield of cyclopentadiene and methylcyclopentadiene obtained Rates are shown in Table 2 below.

Embodiment 3

[0045] This example is used to illustrate the method for preparing cyclopentadiene and methylcyclopentadiene of the present invention.

[0046] Such as figure 1 As shown, (1) carry out the first depolymerization and rectification in the first rectification tower 1 of the above-mentioned carbon nine cuts, and cool at the top of the tower at 37° C. to obtain cyclopentadiene;

[0047] (2) the heavy component (the content of cyclopentadiene is 200PPM weight %) obtained at the bottom of the tower of step (1) is passed in the second rectification tower 2 and carries out the second depolymerization rectification, cooling at the top of the tower at 40°C to give methylcyclopentadiene,

[0048] Wherein, the first depolymerization rectification and the second depolymerization rectification are all carried out under normal pressure, and other operating conditions are shown in Table 1 below, the purity and yield of cyclopentadiene and methylcyclopentadiene obtained Rates are shown in Tab...

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Abstract

The invention relates to a method for preparing cyclopentadiene and methylcyclopentadiene. The method comprises the following steps: 1, carrying out primary depolymerization rectification on a C9 fraction in a first rectification tower, and carrying out tower top cooling to obtain cyclopentadiene; and 2, introducing a heavy component obtained at the tower bottom in step 1 to a secondary rectification tower, carrying out secondary depolymerization rectification, and carrying out tower top cooling to obtain methylcyclopentadiene, wherein the primary depolymerization rectification is carried out under the following conditions: the number of theoretic plates is 10-50, the tower bottom temperature is 180-260 DEG C, and the reflux ratio is 10-35. Compared with present technologies, the method allows the purities and the yields of the prepared cyclopentadiene and methylcyclopentadiene to be high.

Description

technical field [0001] The invention relates to the technical field of ethylene, in particular to a method for preparing cyclopentadiene and methylcyclopentadiene. Background technique [0002] Cyclopentadiene (CPD) is the basic raw material for the production of important organic products such as ferrocene, norbornene, cyclopentene, adamantane, cyclopentane, halocyclopentane and glutaraldehyde, and can also be used to prepare petroleum Resins and unsaturated resins, etc. Methylcyclopentadiene (MCPD) is an important raw material for the production of gasoline additive methylcyclopentadiene manganese tricarbonyl, and can be used in the synthesis of advanced resins, surface coatings, high-grade dyes, plasticizers, curing agents and high-energy rockets Combustion material etc. [0003] The cracking raw material obtained from petroleum cracking to ethylene is separated from the light fraction below carbon 8 to obtain a considerable amount of raffinate carbon 9 fraction. Due t...

Claims

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Application Information

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IPC IPC(8): C07C13/15C07C4/22C07C7/04
CPCC07C4/22C07C7/04C07C13/15
Inventor 王宇飞孙汝柳邹弋王婧李东风
Owner CHINA PETROLEUM & CHEM CORP
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