Catalyst continuous reproducible low octane rating gasoline modifying method

Abstract

The invention discloses a catalyst continuous regeneration low-octane gasoline upgrading method. The low-octane gasoline raw material and the light hydrocarbon raw material are mixed, then enter into a gasoline upgrading reactor, contact and react with the upgrading catalyst in the reactor, the reactant is separated to obtain dry gas, liquefied gas and upgrading gasoline products; the deactivated catalyst in the reaction system is lifted and conveyed to a regeneration system, contacts with the regeneration gas to be burned in a regenerator, the burned regeneration catalyst is lifted and conveyed to the reaction system. The method greatly improves the octane value of the gasoline, and the olefin content in the upgrading gasoline is very low; the continuous regeneration of the deactivated catalyst ensures that the activity and the selectivity of the catalyst in the reactor are both maintained at higher levels; compared with the conventional reactor switching regeneration way, the dry gas yield of the upgrading reaction is obviously decreased, the upgrading gasoline and the liquefied gas as the target products are obviously improved.

Description

technical field [0001] The invention belongs to a reforming conversion process of hydrocarbon oil in the absence of hydrogen. Background technique [0002] More than 80% of gasoline in my country is FCC gasoline. The main feature of FCC gasoline is its high olefin content, which results in high olefin content in gasoline products. With the improvement of people's environmental awareness and the increasing environmental protection regulations Strict, while the new gasoline standard strictly restricts the sulfur content in gasoline, it also puts forward higher requirements for the olefin content, which makes some refineries with relatively simple processing methods only find a suitable method to reduce the olefin content in gasoline. In order to meet the requirements of the new gasoline standard. The olefin content in gasoline can usually be reduced from the following two aspects: one is to reduce the olefin content in catalyst-cracked gasoline; the other is to increase the out...

AI Technical Summary

Problems solved by technology

[0011] The above-mentioned prior art uses a fixed-bed reactor. As the reaction continues, the surface of the catalyst will be gradually covered by coke, resulting in a decrease in the activity and selectivity of the catalyst. In order to ensure product quality, it is necessary to continuously adjust the operating parameters as the reaction progresses. , the yield of modified gasoline will further decrease in the later stage of the reaction

When a fixed bed reactor is used, it needs to be shut down to realize the regeneration of the catalyst. When multiple fixed bed reactors are used, although switching regeneration between multiple reactors can be realized, due to the short cycle life of the catalyst, the catalyst’s Frequent regeneration makes the operation of the device more complicated, and the processing capacity of the device will be reduced when shutting down or switching reactors

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