Preparation technology of ethyl tert-butyl ether etherification

Abstract

This patent application provides a process for the preparation of ethyl tert-butyl ether etherification. The process for the preparation of ethyl tert-butyl ether etherification includes the pre-reaction stage of the fixed-bed reactor and the subsequent reaction stage of the catalytic distillation tower. , the fresh material containing isobutene mixed C4 and ethanol is pumped into the fixed bed reactor according to the alcohol-ene ratio of 0.8-1.0:1, at a temperature of 40-60°C and a material space velocity of 0.5-2.0h ‑1 , The reaction pressure is 0.8-1.5MPa for pre-reaction, and the liquid phase product is sent to the reaction section of the catalytic distillation tower through the pipeline. The technical solution effectively reduces the alcohol-ene molar ratio of the raw material, improves the conversion rate and selectivity of the etherification reaction, and greatly reduces the material consumption and energy consumption of the preparation process and the purity of the ethyl tert-butyl ether product.

Description

technical field [0001] This patent application relates to the preparation process of high-octane gasoline blending components, especially to the preparation process of ethyl tert-butyl ether etherification. Background technique [0002] Environmental protection laws and regulations have proposed new application specifications for unleaded gasoline for vehicles. MTBE has been widely used as an excellent blending component for the production of unleaded, oxygenated and high-octane gasoline for many years. Since the United States found traces of MTBE in groundwater , MTBE environmental issues have attracted public attention, and the U.S. Environmental Protection Agency has made a ruling on MTBE's carcinogenicity. Ethyl tert-butyl ether has similar physical and chemical properties to MTBE, and it has excellent oil-adjusting performance. It is the general trend to replace MTBE with ethyl tert-butyl ether. However, the production and preparation of ethyl tert-butyl ether still ne...

AI Technical Summary

Problems solved by technology

However, the production and preparation of ethyl tert-butyl ether still needs research and development support for technological innovation. Among them, the existing ethyl tert-butyl ether etherification preparation has technical problems such as large alcohol-ene ratio, unsatisfactory conversion rate and selectivity, which are aggravated. Reduce the material consumption and energy consumption of ethyl tert-butyl ether preparation, increase the ethanol content of carbon four after ether, increase the burden of subsequent treatment, and thus affect the product purity of ethyl tert-butyl ether

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