Device for producing p-xylene

Abstract

The invention discloses a device for producing p-xylene, and belongs to the technical field of p-xylene production, the device comprises a stirring cylinder, a bracket and a stirring cover, and also comprises a closing plate, a driving mechanism, a stirring mechanism, an adjusting mechanism, a top scraping mechanism, a precipitation treatment mechanism and two cylinder wall scraping mechanisms. The stirring cylinder is installed on the bracket, the sealing plate is detachably installed at the top of the stirring cylinder, the stirring cover is installed at the top of the sealing plate, a discharging port and a feeding port are formed in the stirring cylinder, the driving mechanism is rotatably installed at the top of the sealing plate, the stirring mechanism is rotatably installed at the bottom of the sealing plate, and the adjusting mechanism is slidably installed on the stirring mechanism. The top scraping mechanism is slidably mounted at the bottom of the sealing plate, the two cylinder wall scraping mechanisms are slidably mounted on the inner side wall of the stirring cylinder, and the precipitation treatment mechanism is mounted at the bottom of the stirring cylinder. According to the device for producing p-xylene, foam generated by stirring is punctured, and then floating foam attached to the interior of the stirring barrel is scraped into the solution.

Description

technical field [0001] The invention relates to the technical field of p-xylene production, in particular to a device for producing p-xylene. Background technique [0002] Para-xylene (para-xylene), a derivative of benzene, is an important chemical raw material. Composite modified p-xylene is a further derivative of p-xylene. [0003] The Chinese invention patent with the existing publication number CN107721844A discloses a preparation method of composite modified p-xylene, which relates to the field of p-xylene preparation and discloses a preparation method of composite modified p-xylene, including: A ) Mix inorganic whiskers with organic fluorine-containing acid solution, grind, stir to react, cool, filter, calcinate, grind, sieve, ultrasonically wash with calcium stearate-containing dispersion in deionized water, dehydrate, and vacuum-dry. Modified powder; B) Add organic solution, co-solvent and modified powder in turn to p-xylene, mix evenly, grind, ultrasonically disp...

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Problems solved by technology

[0004] When the above-mentioned patents are in use, there are many deficiencies. First, when the organic solution is stirred and mixed, the high-speed stirring of the agitator promotes the mixing of the solution, which will cause froth to appear in the solution, and the froth will not burst instantaneously. The compound to be reacted does not come into contact with other reactants, which affects the internal compounding ratio of the solution, resulting in a slower production rate; second, the generation of froth will cause the precipitate to attach to the froth, and the rupture of the froth will cause the precipitate to adhere to the stirring The inner wall of the container affects the production rate. At the same time, the compound to be reacted attached to the froth will remain on the inner wall of the stirred container with the precipitation, resulting in a decrease in the reactants in the container and a decrease in the productivity of the compound modified p-xylene; third, stirring The size of the froth generated inside the cylinder is different. At the same time, under the agitation of the solution by the stirring mechanism, the position of the froth changes all the time, which cannot effectively deal with the froth; Stir and mix with the solution, too much precipitation will cause the contact area of ​​the reactant solution to become smaller, the reaction rate will be slower, and the rate of compound modified p-xylene will also be slower.

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