Coupling method of MTO process and propane dehydrogenation process

A propane dehydrogenation and process technology, applied in the fields of hydrocarbons, hydrocarbons, chemical instruments and methods, can solve the problems of high equipment investment, large floor space, low recovery rate of low-carbon olefins, etc. The effect of land area, reducing investment cost and improving recovery rate

Inactive Publication Date: 2019-04-19
SINOPEC SHANGHAI ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the low recovery rate of low-carbon olefins in the prior art, high equipment investment, and large floor area. It provides a new method for coupling the MTO process and the propane dehydrogenation process, which has low-carbon olefins Advantages of high recovery rate, low equipment investment and small footprint

Method used

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  • Coupling method of MTO process and propane dehydrogenation process
  • Coupling method of MTO process and propane dehydrogenation process
  • Coupling method of MTO process and propane dehydrogenation process

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Embodiment 1

[0026] The nominal capacity of the MTO device in the present invention is 1.8 million tons / year, the reaction intensity: ethylene / propylene ratio=1.5, the output of ethylene is 365,400 tons / year, and the output of propylene is 243,600 tons / year. The PDH unit has a nominal capacity of 600,000 tons / year and a propylene output of 519,000 tons / year.

[0027] The technological process is as follows: the raw material methanol (1) is sent into the MTO reaction unit (101) for catalytic reaction, the reaction product gas (2) flows out from the MTO reaction unit (101) and enters the quenching unit (102), and the product gas (3 ) and the product gas (5) from the heating furnace of the PDH device and the reactor unit are merged into the material (4) and enter the compressed alkali washing unit (103), and enter the MTO depropanizer (104) after compression, and the MTO depropanizer (104) After the C4 and heavier components (8) of the tower bottom flow out, they are combined with the PDH deo...

Embodiment 2

[0034] The nominal capacity of the MTO device in the present invention is 1.8 million tons / year, the reaction intensity: ethylene / propylene ratio=1.2, the output of ethylene is 332,200 tons / year, and the output of propylene is 276,800 tons / year. The PDH unit has a nominal capacity of 600,000 tons / year and a propylene output of 519,000 tons / year. After adopting the integration method of the present invention, the equipment load of existing MTO device is promoted as follows:

[0035] serial number

[0036] Therefore, using the process coupling method of the present invention, compared with the existing MTO unit and PDH unit, the recovery of ethylene is 1,300 tons / year, the recovery of C4 components is 2,300 tons / year, and the benefit of recycling light hydrocarbons is 22 million yuan / year , reducing equipment investment by 523 million yuan, and reducing the area occupied by 1.8 hectares.

Embodiment 3

[0040] The nominal capacity of the MTO device in the present invention is 1.8 million tons / year, the reaction intensity: ethylene / propylene ratio=1.0, the output of ethylene is 308,500 tons / year, and the output of propylene is 300,500 tons / year. The PDH unit has a nominal capacity of 600,000 tons / year and a propylene output of 519,000 tons / year. After adopting the integration method of the present invention, the equipment load of existing MTO device is promoted as follows:

[0041] serial number

[0042] Therefore, using the process coupling method of the present invention, compared with the existing MTO unit and PDH unit, the recovery of ethylene is 1,300 tons / year, the recovery of C4 components is 2,300 tons / year, and the benefit of recycling light hydrocarbons is 22 million yuan / year , reducing equipment investment by 523 million yuan, and reducing the area occupied by 1.8 hectares.

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Abstract

The invention relates to a coupling method of MTO process and propane dehydrogenation process, and mainly solves the problems of low recovery rate of low carbon olefin, high equipment investment and large floor space in the prior art. The invention utilizes the method of coupling MTO process with propane dehydrogenation process, for a 1.8 million ton/year MTO device and 600,000 ton/year PDH device, the method utilizes the price advantage of methanol and propane, and depends on the existing equipment of MTO device to reduce the adding of new equipment, realizes the coupling of MTO and PDH, therefore, the light hydrocarbon recovery benefit is 22 million yuan/year, the equipment investment can be reduced by 523 million yuan, and the land occupation can be used by 1.8 hectares. The technical scheme well solves the problems, and can be applied to the coupling of MTO process and propane dehydrogenation process.

Description

technical field [0001] The invention relates to a method for coupling the MTO process and the propane dehydrogenation process, that is, a process integrating the MTO process of methanol to olefins and the PDH process of propane dehydrogenation; under the premise of fully relying on the existing equipment of the MTO process of methanol to olefins, The technical method for realizing coupling of PDH unit and MTO unit reduces equipment investment, reduces construction land, recovers light olefins in PDH unit, and can be applied to the industrial production of low-carbon olefins. Background technique [0002] At present, the MTO process technology of methanol to olefins has become increasingly mature, and commercial industrial units have been running smoothly for many years. Methanol, the raw material for MTO, can be prepared from coal or natural gas. It has abundant resources, stable supply, low price, and good economic benefits. According to the latest report, natural gas / shale...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/20C07C11/04C07C11/06C07C5/333
CPCC07C1/20C07C5/333C07C11/04C07C11/06Y02P30/20Y02P30/40
Inventor 陈益张永生孙蕾
Owner SINOPEC SHANGHAI ENG
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