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Refinery plant byproduct C4 hydrocarbon and liquefied gas comprehensive processing and utilizing device and method

A technology for comprehensive processing of by-product carbon tetrahydrocarbons, applied in the directions of hydrocarbons, hydrocarbons, chemical instruments and methods, etc. The effect of energy consumption and investment, rational and smooth process design, and simplified process

Active Publication Date: 2018-06-05
BEIJING PETROCHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resulting problem is: to carry out the separation of C4 hydrocarbons, it is necessary to use ordinary rectification technology to remove C3 (propane), and then separate and purify isobutane, n-butane and butene
However, due to the small difference between the boiling points of isobutane and butene-1, high-purity isobutane is separated by ordinary rectification (or precision rectification), which consumes a lot of energy
However, the difference between the boiling points of n-butane and trans-butene is only 1.38°C, and the boiling point of n-butane is between butene-1 and trans-butene. It is difficult to separate butene and n-butane by ordinary rectification. , it is necessary to use technologies such as extractive distillation to make the separation of C4 hydrocarbons consume a lot of energy

Method used

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  • Refinery plant byproduct C4 hydrocarbon and liquefied gas comprehensive processing and utilizing device and method
  • Refinery plant byproduct C4 hydrocarbon and liquefied gas comprehensive processing and utilizing device and method
  • Refinery plant byproduct C4 hydrocarbon and liquefied gas comprehensive processing and utilizing device and method

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Embodiment 1

[0057] This embodiment provides a refinery by-product carbon tetrahydrocarbon and liquefied gas comprehensive processing and utilization device, such as figure 1 As shown, the comprehensive processing and utilization unit of C4 hydrocarbons and liquefied gas produced by the refinery includes an alkylation unit 1, a deisobutanizer 2, a propane-isobutane mixed dehydrogenation unit 3, an MTBE unit 4 and an isomerization unit. device 5. The alkylation unit 1, the deisobutanizer 2, the propane-isobutane mixed dehydrogenation unit 3 and the MTBE unit 4 are connected in sequence; The deisobutanizer 2 is connected with the isomerization unit 5; the isomerization unit 5 is connected with the propane-isobutane mixed dehydrogenation unit 3.

[0058] This embodiment also provides a method for comprehensive processing and utilization of by-product C4 hydrocarbons and liquefied gas in a refinery to produce high-octane gasoline component MTBE. operation, including the following steps:

[...

Embodiment 2

[0064] This implementation provides a light hydrocarbon comprehensive utilization project currently being implemented in a refinery, and two process configurations are designed. Table 4 shows the proportion of each feedstock component of light hydrocarbons in the refinery.

[0065] Table 4

[0066]

[0067]

[0068] The schematic diagram of the original design process device is as follows: figure 2 As shown, it includes a raw material separation unit 201 , an alkylation unit 202 , a propane-isobutane mixed dehydrogenation unit 203 , and an MTBE unit 204 . The raw material separation device 201 is connected with the alkylation device 202 , the raw material separation device 201 is connected with the propane-isobutane mixed dehydrogenation device 203 , and the propane-isobutane mixed dehydrogenation device 203 is connected with the MTBE device 204 in circulation. Feedstock entry and product entry and exit of the unit figure 2 have been marked in detail and will not be...

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Abstract

The invention provides a refinery plant byproduct C4 hydrocarbon and liquefied gas comprehensive processing and utilizing device and method. The device comprises an alkylating unit, an iso-butane dehydrogenation unit and an MTBE unit, wherein the alkylating unit comprises an alkylating device; the iso-butane dehydrogenation unit comprises an iso-butane removal tower and a propane-iso-butane mixeddehydrogenation device; the MTBE unit comprises an MTBE device; the alkylating device, the iso-butane removal tower, the propane-iso-butane mixed dehydrogenation device and the MTBE device communicatesuccessively. The components of C4 hydrocarbon and liquefied gas are processed and utilized. Single component separation of C4 hydrocarbon is avoided by optimizing and configuring a flow, so that thecurrent difficulty of state VI gasoline upgrade of the refinery plant is overcome effectively, the energy consumption is correspondingly reduced and the product quality is ensured; high-octane gasoline components can be produced to the maximum extent, and state VI gasoline upgrade of the refinery plant is achieved.

Description

technical field [0001] The invention belongs to the technical field of oil refining, and relates to a refinery by-product C4 hydrocarbon and liquefied gas comprehensive processing and utilization device and a refinery by-product C4 hydrocarbon and liquefied gas comprehensive processing and utilization method for producing high-octane gasoline component MTBE. Background technique [0002] The C4 hydrocarbons in the oil refining industry are mainly produced by catalytic cracking units, and some are saturated liquefied gas produced by catalytic reforming, hydrocracking and other units. Based on the composition characteristics of C4H / saturated liquefied gas, the refinery adopts the corresponding processing mode. [0003] The composition of typical C4 hydrocarbons in catalytic cracking unit is shown in Table 1: [0004] Table 1 [0005] [0006] Its traditional processing mode is: Catalytic cracking of C4 through MTBE unit to convert isobutene into MTBE, MTBE is used as a hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C41/06C07C43/04C10G50/00
CPCC07C5/00C07C5/327C07C41/06C10G50/00C10G2300/1081C10G2300/1092C07C43/04C07C11/09C07C9/12
Inventor 潘澍宇刘汉英徐庆生
Owner BEIJING PETROCHEM ENG
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