A reaction regeneration system and method for methanol to propylene

A methanol-to-propylene and reaction regeneration technology, which is applied in chemical instruments and methods, catalyst regeneration/reactivation, bulk chemical production, etc., can solve the problem of reducing the conversion rate of methanol, increasing the residence time of olefins in the number of reaction stages, and increasing alkanes and aromatics and other by-products, so as to avoid hydrogen transfer reaction, increase the inlet concentration, and reduce the formation of by-products
CN106008128BActive Publication Date: 2018-06-26上海润和盛建工程科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
上海润和盛建工程科技有限公司
Publication Date
2018-06-26

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Abstract

The present invention relates to a reaction and regeneration system and method for preparing propylene from methanol, the system comprising a reactor, a heating furnace, a heat exchanger, an inlet stream switching valve, an outlet stream switching valve, and a separating unit; switching between reaction and regeneration states is implemented by means of controlling the inlet stream switching valve; the catalyst is internally arranged in the reactor; during the reaction process, a reaction material enters the reactor via a raw material channel, and after reaction inside the reactor, is discharged in the form of a product via a product channel; during the regeneration process, regeneration gas enters the reactor via the raw material channel and regenerates the catalyst in the reactor, the regeneration exhaust gas being discharged from the outlet stream switching valve via the product channel. Compared to the prior art, the present invention uses a single stage adiabatic fixed bed reactor to prepare propylene from methanol, reducing the generation of by-products and having high propylene selectivity; the airspeed of the reactor is also increased, reducing the amount of catalyst used.
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Description

technical field

[0001] The invention relates to a propylene production system and method, in particular to a reaction regeneration system and method for producing propylene from methanol. Background technique

[0002] Propylene is an important basic chemical raw material. With the development of industrial economy in various countries, its demand is increasing. At present, the main production method of propylene is naphtha cracking process. However, the global oil reserves are limited and unevenly distributed, and the price fluctuates greatly. Therefore, the development of non-petroleum propylene production technology is of very important strategic significance for China, which is poor in oil and rich in coal.

[0003] Methanol catalytic dehydration to propylene technology is one of the most competitive propylene production methods using coal as raw material. German patent DE4009459 (1990) discloses a two-step method for producing propylene from methanol, using ZSM-5 molec...

Claims

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