Phenol-acetone preparation process based on KBR technology

Abstract

The invention discloses a phenol-acetone preparation process based on a KBR technology, and relates to the field of phenol-acetone preparation. The preparation cost is reduced; the method specifically comprises the following steps: normal-temperature cumene is conveyed from a storage tank, flows through a heat exchanger and then is conveyed to an oxidation reactor; adding an alkali solution with the concentration of 15-28% to carry out alkali washing on the isopropyl benzene; continuously introducing oxidation air into the bottom of the oxidation reactor through an aerator for oxidation to prepare cumyl hydroperoxide; adding sulfuric acid to decompose cumyl hydroperoxide to obtain phenol and acetone; after the pH value is neutralized, acetone is refined, and an acetone finished product is obtained; refining phenol after preheating to obtain a phenol finished product; and adding an AMS hydrogenation catalyst, and feeding the product into the oxidation reactor in the step S2. According to the method, part of wastewater is recycled, water resources are saved, by-products obtained after phenol refining are utilized, the preparation cost is reduced, and enterprise benefits are guaranteed.

Description

technical field [0001] The invention relates to the technical field of phenol acetone preparation, in particular to a process for preparing phenol acetone based on KBR technology. Background technique [0002] Phenol and acetone are both important organic chemical raw materials and are widely used in various fields; in the preparation process of phenol and acetone, cumene hydrogen peroxide is often used to decompose and prepare, and in the preparation process, the waste water and waste gas generated are only produced by simple After treatment, it is sent to the waste water station and incinerator, resulting in serious waste of raw materials, which is not conducive to the benefit of enterprises. [0003] After searching, the Chinese patent application number is CN201710178844.9, which discloses a method for preparing phenol acetone by decomposing CHP by reactive distillation, which mainly solves the problems of low product selectivity, high investment and large floor space in...

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Problems solved by technology

[0002] Both phenol and acetone are important organic chemical raw materials, and are widely used in various fields; in the preparation process of phenol and acetone, cumene hydroperoxide is mostly used to decompose and prepare, and in the preparation process, the waste water and waste gas generated are only processed by simple After treatment, it is sent to the waste water station and incinerator, resulting in serious waste of raw materials, which is not conducive to corporate profits

[0003] After searching, the Chinese patent application number is CN201710178844.9, which discloses a method for preparing phenol acetone by reactive distillation and decomposing CHP, which mainly solves the problem of low product selectivity, high investment and large floor area in the prior art. The problem; By adopting a method of reactive distillation to decompose CHP to prepare phenol acetone, the CHP raw material containing 25-80wt% is sent to the reactive distillation tower for decomposition reaction to generate phenol acetone, and the material is vaporized and boiled by using the heat of reaction to make the catalyst It is in a flowing state to maintain high activity; at the same time, the acetone product is rectified and separated; the preparation method in the above-mentioned patent has the following problems. Although the preparation of phenol acetone can be realized, the waste produced during the preparation process is not utilized. Lead to serious waste of raw materials, which is not conducive to corporate benefits

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