Start working method of fluidization catalytic reaction device for preparing low carbon olefinic hydrocarbon

Abstract

The invention discloses a working method of fluidization reacting device to make low-carbon olefin through carbinol or / and dimethyl ether, which comprises the following steps: utilizing the working assistant heat source to heat the catalyst bed layer of circulating fluidization reacting device over 200 or 300 deg. c to transmit carbinol or dimethyl ether raw material to the reactor; heating the reacting system device to the ordered temperature due to reacting exothermal; making the system reach normal operating condition rapidly. The invention is fit for working course of heat release fluidization reacting device, which simplifies the equipment and operation to save the cost.

Description

technical field [0001] The invention relates to a start-up method of a fluidized catalytic reaction device for producing light olefins from methanol or / and dimethyl ether, which is suitable for the start-up of an exothermic reaction type circulating fluidized catalytic reaction device, especially suitable for methanol or / and Started construction of the fluidized catalytic reaction device for producing low-carbon olefins such as ethylene and propylene with dimethyl ether. Background technique [0002] Ethylene and propylene are the two basic raw materials with the largest consumption and many uses in the chemical industry. They are known as the mother of modern organic synthesis industry, and their production technology is the focus of the development of developed countries. The main way to produce these two low-carbon olefins is light oil cracking, and other methods include catalytic conversion of low-carbon alcohol ethers, aldehydes, mercaptans, and halogenated hydrocarbons...

AI Technical Summary

Problems solved by technology

However, this method has the following disadvantages: (1) additional consumption of a large amount of diesel oil; (2) light diesel oil cannot be completely combusted at the initial stage of fuel injection, a large amount of carbon black is produced and covered on the surface of the catalyst, and part of the carbon black flows into the atmosphere with the exhaust gas to cause A certain degree of pollution; (3) local overheating may occur and the activity of some catalysts may be permanently lost

Therefore, how to adopt an appropriate start-up method according to the characteristics of the conversion reaction is a challenge in the industrial implementation of this process.

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