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System and method for increasing yield of low-carbon olefins

A technology for low-carbon olefins and carbon tetra-olefins, which is applied in chemical instruments and methods, hydrocarbon purification/separation, processing of hydrocarbon oils, etc. Improve comprehensive competitiveness and economic benefits, and promote the effect of application value

Pending Publication Date: 2022-05-13
SINOPEC ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In order to solve the problem that the existing technology cannot be used to produce low-carbon olefins well for refinery C4, the present invention provides a system and method for increasing the production of low-carbon olefins

Method used

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  • System and method for increasing yield of low-carbon olefins
  • System and method for increasing yield of low-carbon olefins
  • System and method for increasing yield of low-carbon olefins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] This example is used to illustrate the system and method for increasing the production of light olefins of the present invention.

[0064] like figure 1 As shown, the system includes: extraction unit 1, hydrogenation separation unit 2, normalization unit 3, olefin catalytic cracking unit 4, ethylene plant cracking unit 5A and ethylene plant separation unit 5B; unsaturated C4 raw material feed The pipeline is connected with the extraction unit 1; the saturated carbon four raw material feed line is connected with the hydrogenation separation unit 2; the extraction unit 1 is connected with the hydrogenation separation unit through the extraction unit C4 alkane discharge pipeline 2 are connected; the extraction unit 1 is connected with the olefin catalytic cracking unit 4 through the extraction unit carbon tetraolefin discharge pipeline; the hydrogenation separation unit 2 is connected with the normalization unit through the isobutane-rich discharge pipeline Unit 3 is con...

comparative approach 1-2

[0075] Since the rich olefin C4 cannot directly enter into ethylene cracking (causing coking), it can only be burned as fuel. Therefore, comparison scheme 1 is used as fuel gas, and comparison scheme 2 is for the production of high-octane alkylate oil. The comparison of income per ton is shown in Table 1 below.

[0076] Table 1 C4 income per ton of different processing schemes

[0077]

[0078] Note: Triene yield is the sum of the yields of ethylene, propylene, and butadiene.

Embodiment 2

[0080] This example is used to illustrate the system and method for increasing the production of light olefins of the present invention.

[0081] like figure 2 As shown, the system includes: extraction unit 1, hydrogenation separation unit 2, olefin catalytic cracking unit 4, ethylene plant cracking unit 5A and ethylene plant separation unit 5B; Unit 1 is connected; the saturated carbon four raw material feed line is connected with the hydrogenation separation unit 2; the extraction unit 1 is connected with the hydrogenation separation unit 2 through the extraction unit carbon four alkane discharge pipeline; the extraction The extraction unit 1 is connected to the olefin catalytic cracking unit 4 through the C4 olefin discharge pipeline of the extraction unit; the hydrogenation separation unit 2 is connected to the ethylene unit through the hydrogenation tail gas discharge pipeline and the butane-rich discharge pipeline respectively. The separation unit 5B is connected to th...

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Abstract

The invention discloses a system and a method for increasing the yield of low-carbon olefins. The system comprises an extraction unit, an olefin catalytic cracking unit and an ethylene cracking device, the extraction unit is respectively connected with the olefin catalytic cracking unit and the ethylene device cracking unit; and the olefin catalytic cracking unit is connected with the ethylene device separation unit. According to the method, the byproduct C4 of all refinery plants and ethylene devices can be treated in principle, low-carbon olefins such as ethylene, propylene and butadiene with high additional values can be produced to the maximum extent from the molecular level, and the economic benefits of the devices are improved.

Description

technical field [0001] The invention relates to the field of C4 processing, in particular to a system and method for increasing the production of low-carbon olefins by using C4 resources. Background technique [0002] With the continuous deepening of petrochemical processing depth, the C of refineries and chemical by-products 4 The rational utilization of each component in the distillate has been paid more and more attention. Chemical C 4 The 1,3-butadiene contained in the fraction can be separated by extraction for the production of synthetic rubber, C 4 The isobutene in the fraction reacts with methanol through an etherification unit to generate MTBE and can obtain high-purity 1-butene through further precise fractionation, and the utilization of other carbon four components is less. For refinery C4, except for extracting isobutene to produce MTBE or as raw material for alkylation, most of it is usually burned as fuel and wasted in vain. Even for MTBE and alkylated oil...

Claims

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Application Information

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IPC IPC(8): C07C7/163C07C7/148C07C7/00C07C7/04C07C4/04C07C4/06C07C11/04C07C11/06C07C11/16C10G65/12
CPCC07C7/163C07C7/148C07C7/04C07C7/005C07C4/04C07C4/06C10G65/12C10G2400/20C07C11/04C07C11/06C07C11/16
Inventor 马立国杨照盛在行徐晓敏徐垚王鑫泉
Owner SINOPEC ENG
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