Purification device for preparing o-xylene by separating mixed xylene

Abstract

The invention discloses a purification device for preparation of o-xylene separated from mixed xylene, and relates to the technical field of purification devices. The purification device comprises a bottom plate, two supporting frames are fixedly mounted at the top of the bottom plate, and a cooling unit and an electric heating base which are located below the supporting frames are fixedly mounted above the bottom plate. According to the purification device for preparation of o-xylene separated from mixed xylene, through cooperative use of the electric heating base and a purification cabin and cooperative use of a gas collecting valve and an exhaust pump, when the purification device for preparation of o-xylene separated from mixed xylene carries out purification work, the electric heating base heats the bottom of the purification cabin, and then water in a mixed solvent inside the purification cabin forms steam; meanwhile, the gas collecting valve can be in butt joint with a gas collecting connector, so that the exhaust pump can pump out water steam generated in the purification process in the purification cabin through a gas collecting pipe and the gas collecting connector, and the situation that the water steam remains in the purification cabin and influences the product purity is avoided.

Description

technical field [0001] The invention relates to the technical field of purification devices, in particular to a purification device for preparing mixed xylenes and separating o-xylenes. Background technique [0002] Mixed xylene is a mixture of o-, m-, p-xylene and ethylbenzene. It is a colorless and transparent liquid, soluble in ethanol and ether, insoluble in water. When used as a chemical raw material, each isomer can be prepared in advance Separation, the mixture is mainly used as a solvent for paint coatings and aviation gasoline additives. Mixed xylene is a mixture of o-, m-, p-xylene and ethylbenzene. When used as a chemical raw material, the isomers can be separated in advance. The mixture is mainly It is used as a solvent for paints and additives for aviation gasoline. At the same time, as a common solvent for pesticide emulsifiable concentrates, o-xylene has a molecular formula of C8H10 and is a colorless and transparent liquid. It is mainly used as a solvent and ...

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Problems solved by technology

[0003] When preparing mixed xylenes to separate ortho-xylene, it is often necessary to go through the purification step. The common purification method is mainly heating and evaporation to evaporate the water in the mixture. Since mixed xylenes are harmful to a certain extent, it is necessary to Strictly control the whereabouts of the separated products to avoid direct discharge of harmful gases into the air, so the airtightness of the preparation container is very important, but if the purification work is carried out in a closed container, there will inevitably be water vapor inside the container Residue, if the water vapor cannot be discharged in time, it will be easily mixed with the product, which will affect the purity of the product, and the product that has just been prepared has a high temperature and cannot be collected and stored directly. Therefore, we have designed a method for mixing xylene A purification device for separating o-xylene to solve the above problems

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