Apparatus and method for continuously separating isopropylphenol

Abstract

The invention discloses an apparatus and a method for continuously separating o-isopropylphenol and p-isopropylphenol. The apparatus comprises: a tower 1 and a tower 2, wherein the tower 1 and the tower 2 are connected in series, rotation scrapers are respectively arranged on tower body axis centers inside the tower 1 and the tower 2, the lower portion inside the tower 1 is provided with a grid, the outer sides of the tower 1 and the tower 2 are provided with constant temperature material inlets, a liquid purification section, a crystal purification section, a melting purification section and a crystal deposition section are sequentially arranged inside the tower 1 from top to bottom, a residue liquid recovery section, a crystal re-purification section and a crystal re-deposition section are sequentially arranged inside the tower 2 from top to bottom, and an outlet on the bottom of the tower 1 is connected with the constant temperature material inlet on the middle part of the tower 2. The method comprises that: a material requiring separation is subjected to continuous re-crystallization in the tower 1 and the tower 2 to separate o-isopropylphenol and p-isopropylphenol. With the apparatus and the method, continuous material feeding and material discharging can be achieved, and high purity o-isopropylphenol and p-isopropylphenol products can be produced.

Description

technical field [0001] The invention relates to the field of chemical industry, and more specifically, relates to a device and a method for continuously separating isopropyl phenol. Background technique [0002] Isopropylphenol mainly includes two isomers, p-isopropylphenol (p-IPP) and o-isopropylphenol (o-IPP). Among them, p-isopropylphenol (p-IPP) can be used as machine cleaners, wire coatings, synthetic resins, surfactants, adhesives and pharmaceutical and chemical intermediates, etc. body. In addition to being used as surfactant, adhesive and pharmaceutical intermediate, o-isopropylphenol (o-IPP) is particularly important as a synthetic intermediate of the pesticide leafhopper. At present, my country mainly adopts batch reaction to produce p-isopropyl phenol, often using aluminum phenate [Al(OC 6 h 5 ) 3 ] is a catalyzer, not only troublesome operation, low output, but also serious corrosion and pollution, low catalyst selectivity, and difficult separation of adjace...

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Problems solved by technology

[0004] In order to effectively solve the problem that the selectivity of the catalyst in the process of producing isopropyl phenol is not high, the separation of o- and p-isopropyl phenol is difficult, and the industrial production of o- and p-isopropyl phenol is difficult

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