Catalyst packing structure for isobutene oligomerization

Abstract

The present patent application provides a catalyst packing structure for isobutene oligomerization. At least two reactors are arranged in series according to the preparation process direction, a process front-stage reactor is filled with a temperature-resistant strong acid cation exchange resin catalyst, a process rear-stage reactor is filled with normal-temperature strong acid cation exchange resin catalyst, and a condenser is connected between the front-stage reactor and the rear-stage reactor. According to the technical scheme provided by the invention, practices show that in an oligomerization reaction, the conversion ratio of isobutylene can be improved by 5-15%, the selectivity of diisobutylene can be improved by 2-5%, and the service life of the resin catalyst can be prolonged by 1time compared with those of the manner that each reactor of the preparation process is singly filled with the temperature-resistant strong acid cation resin exchange catalyst or the normal-temperaturestrong acid cation resin exchange catalyst.

Description

technical field [0001] This patent application relates to the preparation technology of isobutene superposition reaction in petrochemical industry, especially relates to the packing structure of isobutene superposition catalyst. Background technique [0002] Following the enhancement of environmental protection awareness and the continuous improvement of the system, the technical standards for unleaded gasoline used in vehicles in the automotive industry are also continuously improved. Among them, MTBE, as an excellent blending component for the production of unleaded, oxygenated and high-octane gasoline, has been widely used in countries all over the world, but since the U.S. Environmental Protection Agency ruled that MTBE is carcinogenic, some states in the U.S. have banned it from 2003 The use of MTBE as an additive component of gasoline has been banned since the beginning, and the complete ban of MTBE is imminent. Oil refineries in various countries have successively app...

AI Technical Summary

Problems solved by technology

The main process method of high-octane gasoline in the 1940s, the catalyst is generally phosphoric acid-diatomaceous earth, its technical problems are low catalyst activity, short life, difficult loading and unloading, etc., and it is gradually prepared by alkylation with hydrofluoric acid, sulfuric acid, etc. craft superseded

However, the alkylation preparation process has strict requirements on equipment, and the acid oil residue produced is difficult to treat and has poor economic benefits.

In recent years, there have been related reports on isobutylene superposition research or industrial application, but there are technical contradictions that are difficult to coordinate between conversion rate and selectivity, and there are also technical problems such as short service life of catalysts.

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