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A method of preparing high-purity 1-pentene

A high-purity, pentene technology, used in distillation purification/separation, chemical change purification/separation, organic chemistry, etc., can solve problems such as high process energy consumption, many equipment, and complex processes

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

...

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Abstract

A method of preparing high-purity 1-pentene is disclosed. The method includes steps of: 1) rectifying a raw material that is raffinate C5 after extraction and separation of diolefine and isopentene so as to separate and remove heavy components, obtaining an enriched 1-pentene fraction from the tower top, and discharging heavy components from the tower bottom; 2) subjecting the enriched 1-pentene fraction obtained from the tower top in the step 1) to precision rectification so as to remove light components, obtaining C5 alkanes and other light components from the tower top, and obtaining a 1-pentene crude product from the tower bottom; 3) subjecting the 1-pentene crude product obtained in the step 2) and methanol to esterification to remove 2-methyl-1-butene that is difficult to separate from the crude product; and 4) feeding esterification products obtained in the step 3) to a rectification tower, and purifying to obtain the 1-pentene having purity higher than 98%. By improving process steps, the method simplifies the process, reduces the production cost, and improves the economical efficiency of the process of preparing the 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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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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