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Methanol To Olefins (MTO) gas separation process flow

A methanol-to-olefins and gas separation technology, applied in the purification/separation of hydrocarbons, ethylene production, hydrocarbons, etc., can solve the problems of increasing the load and energy consumption of the demethanizer, deethanizer, propylene tower, etc., to achieve Reduce energy consumption and fixed investment, reduce fixed investment and energy consumption, and reduce total energy consumption

Active Publication Date: 2010-12-22
SINOPEC SHANGHAI ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Using propane at the bottom of the propylene tower to circulate to the demethanizer for washing increases the load and energy consumption of the demethanizer, deethanizer, and propylene tower, which is the shortcoming of this process

Method used

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  • Methanol To Olefins (MTO) gas separation process flow
  • Methanol To Olefins (MTO) gas separation process flow
  • Methanol To Olefins (MTO) gas separation process flow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The dried gas phase and liquid phase MTO hydrocarbon gas enters the high-pressure depropanizer DA404B, and the lighter gas at the top of the tower enters the compressor E-GB201 to be compressed, then undergoes heat exchange at the bottom of the demethanizer, and is condensed step by step with propylene refrigerant to - After 37°C, it enters the demethanizer, and the bottom product enters the low-pressure depropanizer DA404A for further separation; the product at the top of the DA404A tower is condensed step by step by propylene refrigerant to -37°C, and then enters the demethanizer as a detergent, and the bottom product is sent to the demethanizer. Butane tower system; the top condenser of the demethanizer DA301 adopts -40°C refrigerant to condense to obtain methane and hydrogen products, and the bottom products are sent to the deethanizer.

[0034] Table 1 embodiment 1 calculation result

[0035] name

High pressure propane column gas phase feed

High pres...

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Abstract

The invention relates to a Methanol To Olefins (MTO) gas separation process flow which adopts a front C3 separation technology and a segregation and dephlegmation technology and uses the C3 as a detergent without using an ethylene cryogen. The invention has the advantages of simple process flow, low investment, operating cost and ethylene loss, and the like, and can also be suitable for the separation of hydrocarbon inside an ethylene device.

Description

Technical field: [0001] Methanol to Olefins (MTO) gas separation process involves the fields of coal chemical industry, natural gas chemical industry and petrochemical industry, among which the methanol to olefins (MTO) gas separation process 1 and 2 are suitable for separation processes with lighter components. Methanol-to-olefins (MTO) gas separation process three is suitable for separation processes with heavier components. Background technique: [0002] The traditional source of ethylene and propylene is mainly steam cracking of petroleum hydrocarbons, and its raw material is mainly naphtha. However, the shortage of petroleum resources in my country is the main reason restricting the development of my country's ethylene industry. Due to my country's coal-based energy structure, some people in the industry place great hopes on coal chemical projects such as coal-to-olefins. The methanol-to-olefins process refers to a chemical process technology that uses coal-based or na...

Claims

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Application Information

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IPC IPC(8): C07C7/00C07C11/04C07C11/06
CPCY02P30/40
Inventor 王松汉裴雪梅张怀生
Owner SINOPEC SHANGHAI ENG
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