Method for preparing propylene through catalytic conversion of olefin raw material

Abstract

The invention relates to a method for preparing propylene through a catalytic conversion of an olefin raw material. The method comprises the steps of: introducing a raw material rich in C4<=> - C8<=> olefins into a fluidized bed reactor of a catalytic conversion device so as to contact and react with a catalytic cracking catalyst, separating a reaction product and a spent catalyst, subjecting the separated spent catalyst to steam stripping and coke burning regeneration for recycling use, and fractionating the separated product so as to obtain light olefins, gasoline, diesel oil, heavy oil and other low molecular saturated hydrocarbons. The catalytic conversion device consists of a riser reactor, a fluidized bed reactor, a settler, a stripper and a regenerator, wherein, the stripper is located under the fluidized bed reactor and is communicated with the bottom of the fluidized bed reactor, the outlet of the riser reactor is communicated with the bottom of the fluidized bed reactor, the outlet of which is communicated with the inlet of gas-solid separation equipment within the settler, and the catalyst outlet of the settler is communicated with the bottom of the fluidized bed reactor. The light olefins obtained by the method of the invention have high selectivity.

Description

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AI Technical Summary

Benefits of technology

This patented process involves performing chemical conversions between light hydrocarbons (olefms) from crude petroleum products or natural gases into more valuable materials like alcohols that have many applications for various industries including energy production and transportation. These processes involve reactors where liquid acidic solvents called liquids absorb specific types of molecules dissolved therein during processing steps. When these fluorocarboxylic acids break down they become volatile substances known as vapor bubbles. Vaporous components form an emulsion inside the vessel containing them while water droplets remain suspended within it. To separate this mixture effectively, some methods use special equipment designed specifically for handling small particles produced when breaking up heavy atoms.

Problems solved by technology

Technologies described include methods for efficiently making smaller amounts of certain types of chemical products called alkane compounds like butanes and diesel fuel without losing their effectiveness due to being converted during processing steps involving heat transferring between different components. Existing techniques involve modifying existing catalyst compositions based on specific needs rather than taking advantage of new ones.

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