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System and method for removing dme from mtp products

A product and removal technology, which is applied in the direction of chemical instruments and methods, hydrocarbons, hydrocarbon purification/separation, etc., can solve the problems of MTP product separation system complexity, reduction of enterprise profit margins, high construction investment, etc., to reduce equipment Investment cost, guaranteed purity, low equipment investment effect

Active Publication Date: 2018-06-08
CHNA ENERGY INVESTMENT CORP LTD +2
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Problems solved by technology

Patent CN103992201B discloses a method for removing DME, but its MTP product separation system process is complex, construction investment is high, energy consumption is high, and the profit margin of the enterprise is reduced. Therefore, a simple and efficient DME removal process has been developed. It can promote the industrialization process of methanol to olefins technology in terms of energy consumption, operating costs, equipment costs, etc.

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  • System and method for removing dme from mtp products
  • System and method for removing dme from mtp products
  • System and method for removing dme from mtp products

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Embodiment Construction

[0026] The present invention will be described in detail below with reference to the drawings and embodiments, but the content of the present invention is not limited thereto. In the present invention, C3 refers to the component with 3 carbon atoms in the MTP product; C3 below or C3- refers to the component with less than 3 carbon atoms in the MTP product; C4 refers to the component with 4 carbon atoms in the MTP product Components; C4 or more or C4+ refers to components with more than 4 carbon atoms in the MTP product.

[0027] Such as figure 1 As shown, the DME removal system of the present invention includes a quenching unit 5 (also called a quenching unit), a compression unit 6 , a depropanizer 2 and a de-DME tower 3 . Wherein, the quenching unit 5 is used for quenching the MTP product from the propylene synthesis reactor, so that part of the components in the MTP product are condensed to form an oil-water mixture, thereby separating the MTP product into the first gas pha...

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Abstract

The invention provides a system for removing DME (dimethyl ether) in MTP (methanol to propylene) products. The system comprises a quenching unit, a compression unit, a depropanizing tower and a DME removing tower, wherein a lateral line of the depropanizing tower is connected to the DME removing tower, and the tower top of the DME removing tower is connected to the depropanizing tower. The invention further provides a method for removing DME through the DME removing system. With the combination of the depropanizing tower and the DME removing tower, DME can be simply and efficiently removed, and equipment investment is low.

Description

technical field [0001] The invention relates to a system and method for removing dimethyl ether (DME) from MTP products in a methanol-to-propylene (MTP) process, belonging to the field of chemical separation. Background technique [0002] Propylene is one of the chemical products with the largest output and demand in the world. Its total global production capacity is about 100 million tons, and it plays an important role in the national economy. 90% of the world's propylene comes from petroleum routes, and 10% comes from non-petroleum routes. However, my country's shortage of petroleum resources and the increasing dependence on oil imports limit the development of ethylene and propylene products produced by petrochemical routes to a certain extent. [0003] Cracked propylene accounts for 57% of the world's total propylene production capacity, relying on ethylene cracking co-production; refinery propylene accounts for 33% of the total propylene production capacity, and relies...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/06C07C7/00C07C7/09C07C7/04
CPCC07C7/00C07C7/005C07C7/04C07C7/09C07C11/06
Inventor 王林廖祖维雍晓静阳永荣李云王靖岱王峰张伟罗春桃袁炜王亮张玲玲
Owner CHNA ENERGY INVESTMENT CORP LTD
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