Method for preparing 5-tert butyl meta-xylene by adopting tubular reactor

Abstract

The invention discloses a method for preparing 5-tert butyl meta-xylene by adopting a tubular reactor. The method comprises the following steps: S1, preparing an auxiliary catalyst; S2, mixing the auxiliary catalyst with aluminum trichloride, thus preparing a compound catalyst; mixing the compound catalyst with meta-xylene, thus obtaining a raw material A; using tert-butyl chloride as a raw material B, and feeding the raw material A and the raw material B for reacting by respectively adopting two feeding modes; S3, carrying out aftertreatment on a reaction solution after completing reaction, thus obtaining a 5-tert butyl meta-xylene finished product. According to the method disclosed by the invention, the reaction time is greatly shortened, the conversion rate is remarkably increased, generation of byproducts is reduced, the method has the advantages that operation is simple and clear and is safe and reliable, the yield of the prepared 5-tert butyl meta-xylene is up to 95 percent or above and is increased by 20 percent or above than the yield of a traditional technology, and the problems that during a stirring process of a traditional tank reactor, influence of backmixing appears,and charging and discharging are difficult are solved.

Description

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AI Technical Summary

Benefits of technology

This patented technology describes a new way to prepare 1 -terti- butyl m metoimme (BMIM). By mixing certain chemical substance called BMOX and trioxane together at once, this mixture becomes very effective when producing desired products like pentaerythritoltetone or trimellitol. Compared to other methods that involve multiple steps such as distillations or crystallization processes, these techniques have advantages including faster processing times, increased productivity due to less material handling, lower energy consumption compared to existing methods, and fewer harmful waste streams produced from conventional methods. Additionally, there's no need for complicated operations because they only require one step instead of three.

Problems solved by technology

This patented technical solution involves making certain compounds from 2-dimethoxy-5-(trimethyl)phenol (TMP). However this process causes side mixing between two molecules called monomers during its formation. To prevent these issues, it suggests adding another substance like tertiary butanamine or pentaerythritol into one end of the vessel containing both materials beforehand. These modifications help increase efficiency while reducing pressure drop caused by turbulence inside the system.