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A method for removing oxygen from oxygen-containing light hydrocarbons

A light hydrocarbon and oxygen technology, which is applied in the processing of gas mixtures, hydrocarbon oil, petroleum industry, etc., can solve the problems of expensive catalyst cost, light hydrocarbon gas loss of deoxygenation capacity, etc., to reduce investment and consumption, improve deoxygenation capacity, The effect of simple process

Active Publication Date: 2018-03-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To sum up, the existing deoxygenation of light hydrocarbon gas is realized by deoxygenation catalyst, which has the problems of high cost of catalyst, loss of light hydrocarbon gas and low deoxygenation capacity.

Method used

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  • A method for removing oxygen from oxygen-containing light hydrocarbons

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] This example is used to illustrate the method for deoxygenating oxygen-containing light hydrocarbons of the present invention.

[0046] This example deals with the oxygen-containing light hydrocarbon gas produced by the hydrogen peroxide process propylene oxide industrial plant, and the compositions of the oxygen-containing light hydrocarbon gas and absorbent are shown in Table 1.

[0047] Table 1

[0048] Mass composition (weight%)

Oxygenated light hydrocarbon gas

absorbent

Nitrogen

0.24

-

oxygen

4.34

-

carbon dioxide

0.48

-

ethane

14.58

-

Vinyl

56.78

-

propane

5.37

-

Propylene

18.15

-

n-butane

0.06

-

n-Hexane

-

0.03

n-heptane

-

14.45

n-octane

-

14.42

n-nonane

-

1.71

Cyclohexane

-

0.01

Ethylcyclopentane

-

0.79

Cyclooctane

-

0.87

1-Hexene

-

0.01

...

Embodiment 2

[0053] This example is used to illustrate the method for deoxygenating oxygen-containing light hydrocarbons of the present invention.

[0054] This example deals with the oxygen-containing light hydrocarbon gas produced by the hydrogen peroxide process propylene oxide industrial plant, and the compositions of the oxygen-containing light hydrocarbon gas and absorbent are shown in Table 3.

[0055] table 3

[0056] Mass composition (%)

Oxygenated light hydrocarbon gas

absorbent

Nitrogen

0.24

-

oxygen

3.21

-

carbon dioxide

0.31

-

Methanol

1.33

-

propane

1.91

0.01

Propylene

92.94

0.29

n-butane

0.06

-

n-Hexane

-

-

n-heptane

-

39.83

n-octane

-

8.93

n-nonane

-

1.04

Cyclohexane

-

-

Ethylcyclopentane

-

0.89

Cyclooctane

-

0.53

1-Hexene

-

-

1-heptene

-

6.24

1-o...

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Abstract

The invention relates to a method for removing oxygen from oxygen-containing light hydrocarbons. The method comprises the following steps: (1) mixing the oxygen-containing light hydrocarbons with inactive gas so as to obtain dilute gas; and (2) conveying the dilute gas and absorbents into an absorbing column and conducting contacting so as to obtain a column bottom material and oxygen-rich gas not absorbed at the top of the column, wherein the absorbents are C6-C8 distillates, and based on the total weight of the C6-C8 distillates, the C6-C8 distillates contain 8-50wt% of n-heptane, 5-25wt% of n-octane and 30-70wt% of methylbenzene. In the method, by using the C6-C8 distillates as the absorbents of the oxygen-containing light hydrocarbons instead of a deoxidizing catalyst, deoxidizing capacity is greatly increased. Besides, the method is simple in technology, does not need to use ethylene and propylene refrigerators or expanders, and reduces investment and consumption.

Description

technical field [0001] The invention relates to the field of light hydrocarbon processing, in particular to a method for removing oxygen from oxygen-containing light hydrocarbons. Background technique [0002] Light hydrocarbons are valuable ethylene and propylene industrial raw materials and chemical resources, and are bulk chemicals with high added value. The light hydrocarbon gas (such as ethylene, propylene, etc.) produced by many industrial devices contains a lot of oxygen. This oxygen-containing light hydrocarbon gas has a huge potential safety hazard in the polyolefin production industry. In addition, the presence of oxygen in light hydrocarbon gas will not only reduce the activity, selectivity and yield of high-efficiency catalysts for polyolefin reactions, but also affect the performance of the produced polymers. Therefore, the deoxygenation and purification treatment of light hydrocarbon gas is very important for the downstream polyolefin production. [0003] At...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G70/06
Inventor 胡志彦李东风刘智信邹弋李春芳
Owner CHINA PETROLEUM & CHEM CORP
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