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Device and method for separating C9 fraction from byproduct of coal-based MTP (methanol-to-propylene) process

A technology of methanol to propylene and separation device, which is applied in distillation purification/separation, hydrocarbon production from oxygen-containing organic compounds, organic chemistry, etc. The effect of converting added value to coal and extending the industrial chain

Pending Publication Date: 2018-04-06
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing separation process cannot effectively separate the carbon nine fraction

Method used

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  • Device and method for separating C9 fraction from byproduct of coal-based MTP (methanol-to-propylene) process
  • Device and method for separating C9 fraction from byproduct of coal-based MTP (methanol-to-propylene) process
  • Device and method for separating C9 fraction from byproduct of coal-based MTP (methanol-to-propylene) process

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Embodiment

[0065] The separation device and method of the present invention are used to separate the C6+ hydrocarbon mixture in the by-products of the coal-based methanol-to-propylene process. in,

[0066] (1) The C6+ hydrocarbon mixture in the by-product of the coal-based methanol-to-propylene process was prepared under the following operating conditions, and its composition is shown in Table 1.

[0067] Operating conditions:

[0068] The methanol to propylene reactor has an operating temperature of 480°C and an operating pressure of 0.08MPa;

[0069] The operating temperature of the pre-chilling tower in the gas-liquid separation device is 72°C and the operating pressure is 0.019MPa; the operating temperature of the quenching tower in the gas-liquid separation device is 45°C and the operating pressure is 0.008MPa;

[0070] Compression device: the operating temperature is 60°C, and the operating pressure is 1.005Mpa;

[0071] Debutanizer, the operating temperature is 120°C, the opera...

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Abstract

The invention provides a device and a method for separating C9 fraction from a byproduct of a coal-based MTP (methanol-to-propylene) process. The device comprises a heavy component separation tower and a C9 separation tower, wherein the heavy component separation tower is used for receiving C6+ hydrocarbon mixtures in the byproduct of the coal-based MTP process and separating the C6+ hydrocarbon mixtures to obtain C6-C9 hydrocarbon mixtures as tower top products as well as C10+ hydrocarbon mixtures as tower bottom products; the C9 separation tower is used for separating the tower top productsfrom the heavy component separation tower to obtain C6-C8 hydrocarbon mixtures as tower top products as well as C9 fraction as a tower bottom product. With adoption of the device and the method, separation of the C6+ hydrocarbon mixtures in the byproduct of the coal-based MTP process is realized by means of the heavy component separation tower and the C9 separation tower, so that the C9 fraction in the byproduct is separated out, the economic benefit of the MTP process is improved remarkably, diversified production is realized, the coal chemical industry chain is extended, and added value of coal conversion is increased.

Description

technical field [0001] The invention belongs to the field of coal-based methanol-to-propylene technology, in particular to a separation device and method for C9 fractions in by-products of coal-based methanol-to-propylene technology. Background technique [0002] Lurgi's methanol-to-olefins process (ie, MTP process) not only produces propylene, but also produces gasoline as a by-product. For example, Shenhua Ningxia Coal Group currently has two sets of methanol-to-propylene industrial units (propylene output of 500,000 tons / year), and the by-product gasoline products (that is, hydrocarbon by-products) are nearly 400,000 tons / year. The main components of these hydrocarbon by-products are There are olefins, cycloalkanes, aromatics, etc., with very little impurity content, almost no S and N, and it is very wasteful to burn directly as fuel. At the same time, there is an expensive gasoline tax, which leads to the economic benefits of the existing separation process with gasoline...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/20C07C7/04C07C11/06
CPCC07C1/20C07C7/04C07C11/06
Inventor 李云雍晓静罗春桃王林关翀
Owner CHNA ENERGY INVESTMENT CORP LTD
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