Reaction tower for production of DMMn (polyoxymethylene dimethyl ethers) and production technology

Abstract

The invention discloses a reaction tower for production of DMMn (polyoxymethylene dimethyl ethers) and a production technology. The reaction tower comprises a tower body, wherein the tower body sequentially comprises a re-boiling section, a desorption section, a reaction rectifying section and a tower top section inside from bottom to top; a hemiacetal inlet is arranged at the desorption section of the tower body; a methylal inlet is arranged at the top of the tower body; multiple stages of rectifying sections are arranged at the reaction rectifying section, and solid-acid catalyzed resin is loaded at the reaction rectifying section; a DMM3-5 extraction port and a DMM2 extraction port are sequentially arranged at the reaction rectifying section from bottom to top; an isooctanol outlet is arranged at the bottom of the desorption section; the outside of the re-boiling section at the bottom of the tower body is further connected with a re-boiler, and a heavy component outlet is arranged at the bottom of the re-boiling section. Steps of the synthetic process are reduced, and the energy consumption of the process is reduced.

Description

technical field [0001] The invention belongs to the technical field of energy and chemical industry, and in particular relates to an examination process method and device of alkyl polyoxygen ether PODEn. Background technique [0002] The characteristics of my country's energy structure are: rich in coal, poor in oil, and low in gas. The sustained and rapid economic growth requires more and more energy, and the contradiction between social and economic development and oil supply has become increasingly prominent. Since 2009, my country's dependence on foreign crude oil has exceeded the warning line (50%) for six consecutive years, seriously affecting my country's energy strategic security. From the perspective of my country's energy strategy and security, combined with the characteristics of my country's primary energy structure, the development of coal-based liquid fuel synthesis technology is undoubtedly of strategic importance. In addition, my country's methanol productio...

AI Technical Summary

Problems solved by technology

The reaction temperature of this synthesis process is relatively high, usually above 110°C, and must be pressurized to prevent the vaporization of methylal or methanol with a lower boiling point, resulting in increased energy consumption, increased equipment requirements and investment

Images