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Method for reducing energy consumption in oxidation reaction unit of phenol-acetone plant

An oxidation reaction, phenol acetone technology, applied in chemical instruments and methods, preparation of peroxy compounds, preparation of organic compounds, etc., can solve the problem of high energy consumption and achieve the effect of good technical effect

Active Publication Date: 2016-02-24
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 high energy consumption in the prior art, and a new method for reducing energy consumption in the oxidation reaction unit of a phenol acetone plant is provided

Method used

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  • Method for reducing energy consumption in oxidation reaction unit of phenol-acetone plant

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Experimental program
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Effect test

Embodiment 1

[0017] in such as figure 1 In the shown process flow, after the stream (1) that comprises cumene passes through 2# oxidation tower heat exchanger (20) and 2# oxidation tower tower bottom reflux stream (21) carries out heat exchange, then passes through 1# oxidation tower Heat exchanger (2) exchanges heat with 1# oxidation tower bottom reflux stream (9), and the heated cumene stream (3) is further preheated to feed temperature by oxidation feed preheater (4), The preheated cumene feed stream (5) enters the 1# oxidation tower (6), and oxidizes with the air stream (11) passed into the tower; 1# oxidation tower (6) top contains a small amount of isopropyl benzene The tail gas (12) of propylbenzene and water is sent to the tail gas treatment unit for processing; 1# oxidation tower (6) tower still contains the liquid phase flow (7) of isopropyl benzene and hydroperoxide cumene through 1# oxidation tower tower still The pump (8) is pumped out, and a part of the oxidation product (13...

Embodiment 2

[0025]According to the conditions and steps described in Example 1, 1# oxidation tower (6) operating temperature 195 ℃, operating gauge pressure is 0.75MPa; 2# oxidation tower (16) operating temperature 180 ℃, operating gauge pressure is 0.70MPa; 1 The operating temperature of #oxidation tower heat exchanger (2) is 195°C, and the operating gauge pressure is 0.8MPa; the operating temperature of 2# oxidation tower heat exchanger (20) is 180°C; the operating gauge pressure is 0.8MPa. The mass flow ratio of the stream (13) to the stream (15) is 1:3, and the mass flow ratio of the stream (19) to the stream (31) is 1:3. The mass content of cumene in the described logistics (1) that includes cumene is 61.2%; The ratio of the mass flow rate of logistics (5) and logistics (11) is 6:1, and logistics (13) and logistics (22) The mass flow ratio is 6:1. The heated cumene stream (3) is further preheated to 75° C. through an oxidation feed preheater (4). The composition distribution of eac...

Embodiment 3

[0029] According to the conditions and steps described in Example 1, 1# oxidation tower (6) operating temperature 65 ℃, operating gauge pressure is 0.15MPa; 2# oxidation tower (16) operating temperature 60 ℃, operating gauge pressure is 0.10MPa; 1 #Oxidation tower heat exchanger (2) operating temperature is 65°C; operating gauge pressure is 0.1MPa; 2# oxidation tower heat exchanger (20) operating temperature is 60°C; operating gauge pressure is 0.1MPa. The mass flow ratio of the stream (13) to the stream (15) is 1:8, and the mass flow ratio of the stream (19) to the stream (31) is 1:8. The mass content of cumene in the described logistics (1) that comprises cumene is 85.2%; The mass flow ratio of logistics (5) and logistics (11) is 3:1, and logistics (13) and logistics (22) The mass flow ratio is 3:1. The heated cumene stream (3) is further preheated to 86° C. through an oxidation feed preheater (4). The composition distribution of each stream is shown in Table 3. After cal...

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Abstract

The invention relates to a method for reducing energy consumption by employing a phenol-acetone device oxidation reaction unit and is mainly used for solving the problem of relatively high energy consumption in the prior art. According to the technical scheme, the method for reducing energy consumption by employing the phenol-acetone device oxidation reaction unit, disclosed by the invention, comprises the following steps: firstly, enabling a cumin material flow to exchange heat with a bottom reflux material flow (21) of a 2# oxidation tower (16), then exchanging heat with a bottom reflux material flow (9) of a 1# oxidation tower (6), and then preheating and feeding into the 1# oxidation tower (6); conveying an overhead material flow to a tail gas treatment unit, feeding one part of tower bottom material flow to the 2# oxidation tower (16), returning the other part back to the 1# oxidation tower (6) after passing through a 1# oxidation tower heat exchanger (2); conveying the overhead material flow of the 2# oxidation tower (16) to the tail gas treatment unit; and sending one part of the tower bottom material flow to a subsequent oxidation unit, and returning the other part of the material flow back to the 2# oxidation tower (16) after passing through the 2# oxidation tower heat exchanger, thus the problem is relatively well solved; and the method can be applied to the phenol-acetone device oxidation reaction unit.

Description

technical field [0001] The invention relates to a method for reducing energy consumption in an oxidation reaction unit of a phenol-acetone plant. Background technique [0002] Phenol is a colorless needle-like crystal with a special smell, and is a versatile raw material for chemical production. Acetone is a common, highly volatile chemical solvent. Patent Application No. US20110301384A1 Cumene Oxidation System and Patent Application No. CN200580006398.9 The Manufacturing Method of Cumene Hydroperoxide, which introduces the oxidation reaction of cumene and oxygen-containing gas by wet method and dry method to prepare hydrogen peroxide Cumene process. Patent application number CN201120437887.2 relates to a continuous cumene oxidation system with external heat removal. The oxidation tower is connected to the oxidation external circulation cooler and circulation pump, and the oxidation product exchanges heat with the circulating cooling water to realize the cumene oxidation r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C39/04C07C37/08C07C49/08C07C45/53
CPCC07C37/08C07C45/53C07C407/00C07C39/04C07C49/08C07C409/10
Inventor 杨军施竞怡何琨
Owner SINOPEC SHANGHAI ENG