A method for removing oxygen from oxygen-containing light hydrocarbons

A light hydrocarbon and oxygen technology, applied in the fields of organic chemistry, absorption purification/separation, etc., can solve the problems of loss of deoxygenation capacity of light hydrocarbon gas, expensive catalyst cost, etc., and achieve the effect of reducing investment and consumption, simple process, and improving deoxygenation capacity.

Active Publication Date: 2019-06-28
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

[0043] This example is used to illustrate the method for deoxygenating oxygen-containing light hydrocarbons of the present invention.

[0044] This embodiment deals with the oxygen-containing light hydrocarbon gas produced by the hydrogen peroxide process propylene oxide industrial device, and the composition of the oxygen-containing light hydrocarbon gas and the C4 absorbent is shown in Table 1.

[0045] Table 1

[0046] Mass composition (weight%)

Oxygenated light hydrocarbon gas

C4 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

27.91

Isobutane

-

15.59

1-butene

-

7.72

Isobutylene

-

0.04

trans-2-butene

-

28.44

cis-2-butene

-

20.23

water

-

0.01

Dimethyl ether

-

0.06

[0047] ...

Embodiment 2

[0051] This example is used to illustrate the method for deoxygenating oxygen-containing light hydrocarbons of the present invention.

[0052] This embodiment deals with the oxygen-containing light hydrocarbon gas produced by the hydrogen peroxide process propylene oxide industrial device, and the composition of the oxygen-containing light hydrocarbon gas and the carbon five absorbent is shown in Table 3.

[0053] table 3

[0054] Mass composition (weight%)

Oxygenated light hydrocarbon gas

C5 absorbent

Nitrogen

0.36

-

oxygen

4.39

-

carbon dioxide

0.23

-

Methanol

1.04

-

propane

4.78

0.02

Propylene

89.13

0.26

n-butane

0.07

0.01

Isopentane

-

0.63

n-pentane

-

34.03

Cyclopentane

-

17.05

2,3-Dimethylbutane

-

8.83

2-Methylpentane

-

27.42

n-Hexane

-

11.76

[0055] use as figure 1 The process show...

Embodiment 3

[0060] This example is used to illustrate the method for deoxygenating oxygen-containing light hydrocarbons of the present invention.

[0061] This embodiment deals with the oxygen-containing light hydrocarbon gas produced by the hydrogen peroxide process propylene oxide industrial device, and the composition of the oxygen-containing light hydrocarbon gas and the C4 absorbent is shown in Table 5.

[0062] table 5

[0063] Mass composition (weight%)

Oxygenated light hydrocarbon gas

C4 absorbent

Nitrogen

0.24

-

oxygen

3.21

-

carbon dioxide

0.31

-

Methanol

1.33

-

propane

1.91

-

Propylene

92.94

-

n-butane

0.06

27.91

Isobutane

-

15.59

1-butene

-

7.72

Isobutylene

-

0.04

trans-2-butene

-

28.44

cis-2-butene

-

20.23

water

-

0.01

Dimethyl ether

-

0.06

[0064] use as figure 1 The proce...

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Abstract

The invention relates to a method for removing oxygen from oxygen-containing light hydrocarbons. The method comprises the following step: conveying the oxygen-containing light hydrocarbons and absorbents into an absorbing column and carrying out contacting so as to obtain a column reactor material and oxygen-rich gas which is not absorbed at the top of the column, wherein the absorbents are C4 distillates and / or C5 distillates. In the method, by using the C4 distillates and the C5 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): C07C11/06C07C11/02C07C9/02C07C7/11
CPCC07C7/11C07C11/06C07C11/02C07C9/02
Inventor 胡志彦李东风刘智信邹弋李春芳
Owner CHINA PETROLEUM & CHEM CORP
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