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Method for producing isopropyl benzene

A production method and technology of cumene, applied in the direction of chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve the problems of low cumene concentration, high energy consumption for separation, high benzene content, etc., and achieve the reduction of benzene concentration , good technical effect, effect of reducing concentration

Active Publication Date: 2006-12-27
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is that there is a low concentration of cumene in the anti-alkylation product in the above-mentioned literature, but the benzene content is relatively high, and the problem of high energy consumption for separation provides a new method for producing cumene

Method used

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  • Method for producing isopropyl benzene

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Experimental program
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Effect test

Embodiment 1

[0021] according to figure 1 The technological process, the catalyst bed of the alkylation reactor is divided into four sections, and the shaped catalyst (20-60 mesh) of 20 grams of MCM-22 zeolite is loaded. The first stream of propylene is fed in four stages. The reaction conditions of the alkylation reactor are: reaction temperature 145°C, reaction pressure 2.3MPa, first stream of benzene feed rate 46.4 g / h, first stream feed rate of propylene 10.0 g / h Hour.

[0022] The alkylation-reverse alkylation reactor is divided into two sections of the alkylation catalyst bed, loaded with 10 grams of MCM-22 zeolite molded catalyst (20-60 mesh), and the second propylene is fed in two sections. The anti-alkylation catalyst bed is loaded with 10 grams of shaped catalyst of Beta zeolite. The reaction conditions of the alkylation catalyst bed are: reaction temperature 150° C., reaction pressure 3.1 MPa, second benzene feed rate 27.8 g / hour, second propylene feed rate 3.0 g / hour. The re...

Embodiment 2

[0025] according to figure 1The technological process, the catalyst bed of the alkylation reactor is divided into four sections, and the shaped catalyst (20-60 mesh) of 20 grams of MCM-22 zeolite is loaded. The first stream of propylene is fed in four stages. The reaction conditions of the alkylation reactor are: reaction temperature 150°C, reaction pressure 2.9MPa, first stream of benzene feed rate 42.9 g / h, first stream feed rate of propylene 11.0 g / h Hour.

[0026] The alkylation-reverse alkylation reactor is divided into two sections of the alkylation catalyst bed, loaded with 10 grams of MCM-22 zeolite molded catalyst (20-60 mesh), and the second propylene is fed in two sections. The anti-alkylation catalyst bed is loaded with 10 grams of shaped catalyst of Beta zeolite. The reaction conditions of the alkylation catalyst bed are: reaction temperature 155° C., reaction pressure 2.7 MPa, second benzene feed rate 33.2 g / hour, second propylene feed rate 3.5 g / hour. The rea...

Embodiment 3

[0029] according to figure 1 The technological process, the catalyst bed of the alkylation reactor is divided into four sections, and the shaped catalyst (20-60 mesh) of 20 grams of MCM-22 zeolite is loaded. The first stream of propylene is fed in four stages. The reaction conditions of the alkylation reactor are: reaction temperature 150°C, reaction pressure 2.5MPa, first stream of benzene feed rate 43.0 g / h, first stream feed rate of propylene 11.0 g / h Hour.

[0030] The alkylation-reverse alkylation reactor is divided into two sections of the alkylation catalyst bed, loaded with 10 grams of MCM-22 zeolite molded catalyst (20-60 mesh), and the second propylene is fed in two sections. The anti-alkylation catalyst bed is loaded with 10 grams of shaped catalyst of Beta zeolite. The reaction conditions of the alkylation catalyst bed are: reaction temperature 155° C., reaction pressure 2.6 MPa, second benzene feed rate 29.3 g / hour, second propylene feed rate 3.5 g / hour. The re...

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Abstract

The invention discloses a manufacturing method of cumene, which is characterized by the following: improving density of alkyl benzene of monosubstituted product in the reaction product; saving energy; dividing raw material and propone into two parts separately; inputting the first part of benzene and propone in the fixing bed hydrocarbonization reactor to proceed hydrocarbonization reaction; inputting the second part of benzene and propone in the hydrocarbonization-transalkylation reactor to generate cumene and multiple cumene; flowing non-reacting cumene and multiple cumene in the alkyl transmitting reaction; fitting for industrial manufacturing of cumene.

Description

technical field [0001] The invention relates to a method for producing cumene from benzene and propylene. Background technique [0002] Cumene is an important organic chemical raw material and the main intermediate compound in the production of phenol, acetone and α-methylstyrene. Industrially, cumene is prepared by the alkylation reaction of propylene and benzene, and its by-product is mainly polycumene. As early as 1945, UOP announced the method of preparing cumene by reacting propylene and benzene in the presence of an acidic catalyst (SPA method) (USP2382318). The SPA method uses solid phosphoric acid as an alkylation catalyst, because solid phosphoric acid cannot catalyze Transalkylation reaction, so there is no anti-alkylation section in the process flow. Therefore, the SPA method can only operate under the condition of high styrene molar ratio (5-7), and the yield of cumene is only about 95%. In the 1980s, Monsanto developed AlCl 3 T...

Claims

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Application Information

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IPC IPC(8): C07C15/085C07C2/66
Inventor 高焕新周斌顾瑞芳方华季树芳
Owner CHINA PETROLEUM & CHEM CORP
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