Process and device for producing MTBE (methyl tert-butyl ether)/butene-1 from remaining C4

Abstract

The invention discloses a process and a device for producing MTBE (methyl tert-butyl ether) / butene-1 from remaining C4.The process comprises the following steps that the remaining C4 extracted from butadiene is mixed with methanol in a mixer and then enters an etherification reactor, so as to react in the etherification reactor to generate MTBE; streams after reaction enter a catalytic distillation column for further reaction and separation in the catalytic distillation column, the MTBE as a product is separated at the column bottom of the catalytic distillation column and enters an MTBE product storage tank; the remaining C4 is separated from the column top of the catalytic distillation column and passes through a methanol extraction water tower and a methanol recovery tower in sequence for methanol recovery, and the recovered methanol returns to an inlet of the etherification reactor, so as to continue to react; the remaining C4 is removed from the methanol and enters a C4 buffer tank from the methanol extraction water tower; the remaining C4 enters a C4 dividing wall column, and a butene-1 product is separated from the middle part of the C4 dividing wall column and enters a butene-1 product tank. According to the process and the device, the investment and the corresponding energy consumption of an isobutane tower are reduced, additionally, an occupied area is reduced, energy consumption is obviously reduced, and the processing cost is reduced.

Description

technical field [0001] The invention relates to the technical field of production of MTBE and butene-1 products, in particular to a process and a device for producing MTBE / butene-1 from surplus C4. Background technique [0002] With the rapid development of my country's national economy, the country pays more and more attention to environmental protection, especially puts forward more stringent requirements for improving the quality of my country's fuel oil and reducing the emission of various harmful substances in automobile exhaust. MTBE (Methyl tertiary-butyl ether) has stable chemical properties, high combustion efficiency, and can inhibit the formation of ozone. Gasoline added with MTBE can also improve the cold start characteristics and acceleration performance of the car, and reduce the CO content in the exhaust gas. Considered an irreplaceable high-octane gasoline component. [0003] The production process of synthesizing MTBE is mainly to use the mixed C4 containin...

AI Technical Summary

Problems solved by technology

[0006] At present, the traditional butene-1 rectification separation method is mainly separated by two sets of towers. First, isobutane is separated through the isobutane separation tower, and then pure butene-1 is separated from the top of the tower through the butene-1 tower. , two sets of tower separation method requires large equipment investment and high energy consumption, resulting in high operating costs and large equipment footprint

The gas phase at the top of the tower is generally condensed through a water cooler or an air cooler, resulting in waste of energy consumption

Images