Method for preparing phenol and acetone through reaction rectification decomposition of CHP

A technology of phenol acetone and reactive distillation, which is applied to the preparation of carbon-based compounds, chemical instruments and methods, and the preparation of organic compounds. It can solve the problems of low product selectivity, high investment, and large floor area, and achieve high activity. Effect

Active Publication Date: 2017-06-20
SINOPEC SHANGHAI ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the problem of low product selectivity, high investment and ...

Method used

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  • Method for preparing phenol and acetone through reaction rectification decomposition of CHP
  • Method for preparing phenol and acetone through reaction rectification decomposition of CHP
  • Method for preparing phenol and acetone through reaction rectification decomposition of CHP

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of method that reactive distillation decomposes CHP prepares phenol acetone, as figure 1 As shown, taking the 3-section solid catalyst bed as an example, the cumene hydroperoxide CHP raw material (11) enters the reactive distillation column (1) from the middle, and enters the reaction section with the gravity flow to contact the solid catalyst, and CHP decomposition occurs The reaction produces phenol acetone and produces a large amount of heat of reaction. All the liquid phase acetone and a small amount of raw material CHP and a small amount of cumene are evaporated into the gas phase and discharged from the upper part of the reaction section; the liquid phase material without acetone is reacted from the reactive distillation column (1) The lower part of the section is drawn, and in the intercooler (3), the intercooler (4), and the intercooler (5), it exchanges heat with the circulating cooling water and removes the heat of decomposition reaction, and the reactiv...

Embodiment 2

[0029] According to the conditions and steps described in Example 1, only the production scale of the phenol-acetone plant is changed to 200,000 tons / year, and the method for preparing phenol-acetone by reactive distillation and decomposition of CHP of the present invention is adopted, and the process parameters are: reactive distillation column reaction section The operating temperature is 82°C, and the operating pressure is 132kPaA; the aspect ratio of the reactor is 6:1, and the reactor is filled with 4 stages of catalysts. The operating temperature of the rectification section of the reactive distillation tower is 53°C, the operating pressure is 98kPaA, and the reflux ratio is 0.71; the number of rectification trays is 46, and the position of the feed plate is the 44th tray from top to bottom.

[0030] Thus, the selectivity of phenol is 99.50%, the selectivity of acetone is 99.35%, and the purity of acetone product is 99.91wt%. Compared with [Comparative Example 1], the nu...

Embodiment 3

[0032] According to the conditions and steps described in Example 1, only the production scale of the phenol-acetone plant is changed to 350,000 tons / year, and the method for preparing phenol-acetone by reactive distillation and decomposition of CHP of the present invention is adopted, and the process parameters are: reactive distillation column reaction section The operating temperature is 82°C, and the operating pressure is 132kPaA; the aspect ratio of the reactor is 6:1, and the reactor is filled with 4 stages of catalysts. The operating temperature of the rectification section of the reactive distillation tower is 53°C, the operating pressure is 98kPaA, and the reflux ratio is 0.71; the number of rectification trays is 46, and the position of the feed plate is the 44th tray from top to bottom.

[0033] Thus, the selectivity of phenol is 99.45%, the selectivity of acetone is 99.30%, and the purity of acetone product is 99.91wt%. Compared with [Comparative Example 1], the nu...

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Abstract

The invention relates to a method for preparing phenol and acetone through reaction rectification decomposition of CHP. The method is mainly used for solving the problems in the prior art that the product selectivity is relatively low, the investment is relatively high, and the floor area is relatively large. According to the method, by adopting the technical scheme that the method for preparing phenol and acetone through reaction rectification decomposition of CHP comprises the steps of feeding a 25wt% to 80wt% CHP raw material to a reaction rectification tower for a decomposition reaction so as to produce phenol and acetone, gasifying and boiling the material by using reaction heat so as to enable a catalyst to be in a flow state and keep high activity, and meanwhile, carrying out rectifying separation on the acetone product, the selectivity of phenol is improved to 99.35% to 99.55%, the selectivity of acetone is improved to 99.25% to 99.45%, the purity of the acetone product is not lower than 99.9wt%, and the problems are better solved, so that the method can be applied to the production of phenol and acetone.

Description

technical field [0001] The invention relates to a method for preparing phenol acetone by decomposing CHP through reactive distillation. Background technique [0002] Phenol and acetone are basic organic chemical raw materials with a wide range of uses, and the domestic and foreign markets are in great demand. The phenol acetone plant for producing phenol acetone first uses cumene raw material and air to prepare cumene hydroperoxide CHP in the oxidation reaction tower, then decomposes CHP under the action of a catalyst to generate phenol and acetone, and finally separates and refines it by rectification Purify to get phenol product and acetone product. [0003] The patent application number CN201210512571.4 in the prior art is used for a novel reactive distillation process for the production of phenol and acetone, which discloses that the three processes of CHP decomposition, separation of cumene, and rough separation of phenol are coupled to a rectification tower, thereby ...

Claims

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Application Information

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IPC IPC(8): C07C37/08C07C39/04C07C45/53C07C49/08
CPCC07C37/08C07C45/53C07C39/04C07C49/08Y02P20/52Y02P20/10
Inventor 黄承明杨军祁冰施竞怡顾静苒王东张斌李真泽何琨
Owner SINOPEC SHANGHAI ENG
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