A method for preparing high-purity 1-pentene

A technology of pentene and isopentene, applied in the field of high-purity 1-pentene, can solve the problems of many equipments, complicated processes and high process energy consumption

Active Publication Date: 2017-09-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the complexity of the whole process, more equipment, and the use of extractive distillation, the energy consumption of the process is relatively high.

Method used

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  • A method for preparing high-purity 1-pentene
  • A method for preparing high-purity 1-pentene
  • A method for preparing high-purity 1-pentene

Examples

Experimental program
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Effect test

Embodiment

[0020] Embodiment [1-10]

[0021] The process flow of Examples 1-10 is shown in the accompanying drawings. The raw material raffinate C5 fraction W1 is a petroleum petroleum C5 fraction from which diolefins and isopentene have been extracted and separated, and its main composition is shown in Table 1.

[0022] The process operating conditions of the rectifying towers 1, 2 and 4 of each embodiment, and the process operating conditions of the etherification reactor 3 are shown in Tables 2 and 3 respectively. The composition of material W7 was analyzed by gas chromatography, and the yield of 1-pentene was calculated in combination with the flow rate of each material. The results are shown in Table 4.

[0023] Table 1.

[0024] components

Content (weight%)

Isopentane

16.58

1,4 Pentadiene

0.26

1-pentene

9.34

2-Methyl-1-butene

0.63

n-pentane

55.95

2-pentene

13.01

2-Methyl-2-butene

3.95

margin ...

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Abstract

A method for preparing high-purity 1-pentene. The process includes: using the raffinated C5 after diolefins and isopentene have been extracted and separated as raw material for rectification and separation to remove heavy components, the top of the tower is enriched with 1-pentene cuts, and the heavy components are discharged from the bottom of the tower; by process 1 ) The fraction enriched in 1-pentene obtained at the top of the tower is subjected to precise rectification to remove light components, and the top of the tower obtains carbon penta-alkanes and other light components, and the crude product of 1-pentene is obtained in the bottom of the tower; by process 2) The crude product of 1-pentene is etherified with methanol to remove the difficult-to-separate 2-methyl-1-butene in the crude product; the ether product obtained in process 3) is sent to a refining tower for purification to obtain More than 98% 1-pentene. The invention improves the process flow, simplifies the process, reduces the production cost, and improves the economic efficiency of the process for preparing high-purity 1-pentene.

Description

technical field [0001] The invention relates to a method for separating petroleum C5 fractions, in particular to a method for preparing high-purity 1-pentene by separating petroleum C5 fractions through processes such as precision rectification and etherification. Background technique [0002] The process of producing ethylene from petroleum cracking produces a considerable amount of carbon five fractions, which account for about 10% of the ethylene production. At present, the comprehensive utilization of the C5 fraction is mainly to extract and separate the C5 fraction to obtain more valuable diolefins such as isoprene, dicyclopentadiene and piperylene, and isopentene. The residual C5 material from diolefins and isopentene after extraction and separation accounts for about 10% to 15% of the C5 fraction raw material. Because the boiling points of the five components of raffinate carbon are very close, it is difficult to separate them, so they are generally only used as fuel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/10C07C7/04C07C7/148
Inventor 蒋方红张金平奚军傅建松
Owner CHINA PETROLEUM & CHEM CORP
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