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Method for producing iso-propyl benzene by benzene and propylene liquid-phase alkylation

A technology of propylene liquid-phase alkyl and cumene, which is applied in the production of bulk chemicals, chemical instruments and methods, organic chemistry, etc. The effect of technical effects

Active Publication Date: 2009-12-09
CHINA PETROLEUM & CHEM CORP +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 that the catalyst used in the prior art has the problem of high styrene-to-ene ratio, and a new method for producing cumene by liquid-phase alkylation of benzene and propylene is provided

Method used

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  • Method for producing iso-propyl benzene by benzene and propylene liquid-phase alkylation
  • Method for producing iso-propyl benzene by benzene and propylene liquid-phase alkylation
  • Method for producing iso-propyl benzene by benzene and propylene liquid-phase alkylation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Sodium aluminate (Al 2 o 3 42.0% by weight) 6.1 grams are dissolved in 288 grams of water, add 1.0 grams of sodium hydroxide to make it dissolve, then add 34.0 grams of hexahydropyridine under stirring, then add 60 grams of solid silicon oxide, and 5.5 grams of trimethylchlorosilane , the material ratio (molar ratio) of reactant is:

[0022] SiO 2 / Al 2 o 3 =40

[0023] NaOH / SiO 2 =0.025

[0024] Chlorotrimethylsilane / SiO 2 =0.05,

[0025] Hexahydropyridine / SiO 2 =0.50

[0026] h 2 O / SiO 2 =16

[0027] After the reaction mixture was evenly stirred, it was put into a stainless steel reaction kettle, and crystallized at 135° C. for 50 hours while stirring. After taking out, it is filtered, washed and dried. SiO was obtained by chemical analysis 2 / Al 2 o 3 The molar ratio was 42.1.

[0028] After drying the sample was determined, its Si 29 The NMR solid-state nuclear magnetic spectrum peak appears at 15.1ppm. Its X-ray diffraction data are shown in T...

Embodiment 2

[0033] Dissolve 3.0 grams of aluminum oxide in 450 grams of water, add 16.0 grams of sodium hydroxide to dissolve it, then add 34.7 grams of hexamethyleneimine while stirring, then add 60 grams of solid silicon oxide, dimethyldiethyl Oxygensilane 5.9 grams, the material ratio (mol ratio) of reactant is:

[0034] SiO 2 / Al 2 o 3 =30

[0035] NaOH / SiO 2 =0.2

[0036] Dimethyldiethoxysilane / SiO 2 =0.04,

[0037] Hexamethyleneimine / SiO 2 =0.35

[0038] h 2 O / SiO 2 =25

[0039] After the reaction mixture was stirred evenly, it was put into a stainless steel reaction kettle, and crystallized at 145° C. for 70 hours while stirring. After taking out, it is filtered, washed and dried. SiO was obtained by chemical analysis 2 / Al 2 o 3 The molar ratio was 30.1.

[0040] After drying the sample was determined, its Si 29 The NMR solid-state nuclear magnetic spectrum peak appears at -18.9ppm. Its X-ray diffraction data are shown in Table 2.

[0041] Table 2

[0042] ...

Embodiment 3

[0045] Sodium aluminate (Al 2 o 3 42.0% by weight) 3.5 g was dissolved in 540 g of water, 8.0 g of sodium hydroxide was added to dissolve it, then 30 g of hexamethyleneimine was added while stirring, and then 60 g of solid silicon oxide, hexamethyl di Siloxane 8.0 grams, the material ratio (mol ratio) of reactant is:

[0046] SiO 2 / Al 2 o 3 =70

[0047] NaOH / SiO 2 =0.2

[0048] Hexamethyldisiloxane / SiO 2 =0.05,

[0049] Hexamethyleneimine / SiO 2 =0.3

[0050] h 2 O / SiO 2 =30

[0051] After the reaction mixture was stirred evenly, it was put into a stainless steel reaction kettle, and crystallized at 135° C. for 35 hours while stirring. After taking out, it is filtered, washed and dried. SiO was obtained by chemical analysis 2 / Al 2 o 3 The molar ratio was 68.5.

[0052] After drying the sample was determined, its Si 29 The NMR solid-state nuclear magnetic spectrum has a nuclear magnetic resonance spectrum peak at 16.8ppm, and its X-ray diffraction data are...

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Abstract

The present invention relates to liquid phase alkylation process of producing cumene with benzene and propylene. The present invention produces cumene with benzene and propylene in the molar ratio of 1.0-4.0 as material, and through contacting the material with the catalyst to react at the reaction temperature of 100-200 deg.c, pressure of 1.5-4.0 MPa and propylene space velocity of 0.2-8.0 / hr. The catalyst has the active components of (1 / n)Al2O3:SiO2:(m / n)R, where, n=5-250, m=0.01-50, and R is alkyl group, alkyl alkenyl group and / or phenyl group, and Si29NMR. The present invention has relatively low benzene / propylene ratio, and may be applied in industrial production of cumene.

Description

technical field [0001] The invention relates to a method for producing cumene by liquid-phase alkylation of benzene and propylene. Background technique [0002] Cumene is an important intermediate raw material for the production of phenol, acetone and α-methylstyrene. At present, more than 90% of phenol in the world is produced by the cumene method. [0003] The traditional method of producing cumene in industry has the solid phosphoric acid method (SPA method) of U.S. Universal Oil Company (UOP) and the improved AlCl of Monsanto / Lummus Crest company 3 Law. The operating conditions of SPA are harsh and there are many impurities, so the yield of cumene cannot be increased by anti-alkylation. while AlCl 3 Although the method has milder reaction conditions and can increase the yield of cumene through anti-alkylation, the catalyst is highly corrosive, polluted heavily and post-treatment is complicated. [0004] At present, acidic zeolites are generally used as catalysts for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C15/085C07C2/66B01J31/02
CPCY02P20/52
Inventor 高焕新周斌魏一伦方华顾瑞芳季树芳
Owner CHINA PETROLEUM & CHEM CORP
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