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Preparation method of isopropyl benzene

A technology of cumene and acetophenone, which is applied in the field of hydrogenation of acetophenone into ethylbenzene, which can solve problems such as environmental pollution and poor catalyst stability

Active Publication Date: 2014-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is that the existing technology for preparing cumene has the problems of poor catalyst stability and serious environmental pollution, and provides a new one-step method for realizing the hydrogenolysis of benzyl alcohol and the hydrogenation of acetophenone

Method used

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  • Preparation method of isopropyl benzene
  • Preparation method of isopropyl benzene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Mix 100.0 g silica with 100.0 g Mg 2+ Immerse in an equal volume of 3% aqueous solution, dry, 500 o After C is roasted, MgO-modified carrier I is obtained, and its composition is: 4.76%MgO-95.24%SiO 2 ; 1.0 g PdCl 2 The solid was dissolved in a solution consisting of 10 g of concentrated hydrochloric acid and 89 g of purified water to obtain solution I. According to the method of equal volume impregnation, 50.0g solution I was impregnated on 50.0g carrier I, and after drying, at 500 o The catalyst was obtained by calcining at C for 4.0 h. The specific composition of catalyst A1 is shown in Table 1.

[0023] Weigh 50.0 g Al 2 o 3 , 10.0 gSiO 2 Carrier, placed in 200 ml of water at 75 o C under stirring to form slurry I; Weigh 150.0 g Cu (NO 3 )2 ?3H 2 O, 50.0 g Zn(NO 3 ) 2 ?6H 2 O, 32.0g Ca(NO 3 ) 2 ?4H 2 O, 30.0 g by weight 50%Mn (NO 3 ) 2 The solutions were dissolved together in 0.8 L of water in Solution I. Add K dropwise to solution I 2 CO 3 aq...

Embodiment 2

[0027] Mix 100.0 g silica with 100.0 g Ca 2+ Immerse in an equal volume of aqueous solution with a content of 6%, dry, 500 o After C is roasted, CaO-modified carrier I is obtained, and its composition is: 7.7%CaO-92.3%SiO 2 ; 0.8 g PdCl 2 The solid was dissolved in a solution consisting of 10 g of concentrated hydrochloric acid and 89.2 g of purified water to obtain solution I. According to the method of equal volume impregnation, 50.0g solution I was impregnated on 50.0g carrier I, and after drying, at 500 o The catalyst A2 was obtained by calcining at C for 4.0 h. The specific composition of catalyst A2 is shown in Table 1.

[0028] Weigh 40.0 g Al 2 o 3 , 20.0 gSiO 2 Carrier, placed in 200 ml of water at 75 o C under stirring to form slurry I; Weigh 200.0 g Cu (NO 3 ) 2 ?3H 2 O, 50.0 g Zn(NO 3 ) 2 ?6H 2 O, 30.0g Mg(NO 3 ) 2 ?6H 2 O, 40.0 g by weight 50%Mn (NO 3 ) 2 The solutions were dissolved together in 0.8 L of water in Solution I. Add K dropwise to ...

Embodiment 3

[0032] Mix 100.0 g silica with 100.0 g Zn 2+ Immerse in an equal volume of aqueous solution with a content of 5%, dry, 600 o After C is roasted, ZnO-modified carrier I is obtained, and its composition is: 5.9%ZnO-94.1%SiO 2 ; 1.5 g PdCl 2 The solid was dissolved in a solution consisting of 10 g of concentrated hydrochloric acid and 88.5 g of purified water to obtain solution I. According to the method of equal volume impregnation, 50.0g solution I is impregnated on 50.0g carrier I, after drying, at 450 o The catalyst A3 was obtained by calcining at C for 4.0 h. The specific composition of catalyst A3 is shown in Table 1.

[0033] Weigh 40.0 g Al 2 o 3 , 30.0 gSiO 2 Carrier, placed in 200 ml of water at 80 o C under stirring to form slurry I; Weigh 150.0 g Cu (NO 3 ) 2 ?3H 2 O, 100.0 g Zn(NO 3 ) 2 ?6H 2 O, 20.0g Zr(NO 3 ) 4 ?5H 2 O, 40.0 g by weight 50%Mn (NO 3 ) 2 The solutions were dissolved together in 0.8 L of water in Solution I. Na was added dropwise ...

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Abstract

The invention relates to a preparation method of isopropyl benzene, and mainly solves the problem of poor stability of catalyst in the processes of benzyl alcohol hydrogenolysis and acetophenone hydrogenation. The invention adopts hydrogen and hydrocarbons containing alpha, alpha-dimethyl benzylalcohol and acetophenone as raw materials. The raw materials successively contact with a catalyst A and a catalyst B for reaction under the conditions of molar ratio of alpha, alpha-dimethyl benzylalcohol in the hydrogen / hydrocarbon material being 5-15:1, reaction temperature of 160-240 DEG C, reaction pressure of 0.5-5.0 MPa and volume space velocity of hydrocarbon material of 1.0-10.0 / h. The catalyst A and B catalyst are in the volume ratio of 0.5-3:1, the catalyst A is a Pd catalyst, and the catalyst B is a copper catalyst. The technical scheme can well solve the problem and can be used in industrial production of epoxypropane through dicumyl peroxide method.

Description

technical field [0001] The invention relates to a method for preparing cumene, in particular to a method for preparing cumene by catalytic hydrogenolysis of α,α-dimethylbenzyl alcohol raw materials and converting acetophenone into ethylbenzene through hydrogenation. Background technique [0002] Propylene oxide (referred to as PO) commercial production methods mainly include chlorohydrin method, co-oxidation method and cumene peroxide cycle method (CHP). In addition, direct oxidation of hydrogen peroxide and direct oxygen oxidation can also be used to produce PO. At present, in terms of propylene oxide production process, European and American countries mainly use co-oxidation method, which can be divided into ethylbenzene co-oxidation method and isobutane co-oxidation method (PO / TBA method) according to raw materials and co-production products. In other areas, the chlorohydrinization process is the main method. [0003] At the beginning of this century, Japan’s Sumitomo C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C15/085C07C1/20C07C1/207C07C15/073B01J23/89
CPCY02P20/52
Inventor 王辉王德举刘仲能黄琴琴张勤
Owner CHINA PETROLEUM & CHEM CORP
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