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Alkylation method of benzene and ethanol

An ethanol alkyl, ethanol technology, applied in chemical instruments and methods, organic chemistry, bulk chemical production, etc., to achieve good technical effects, inhibit carbon deposition, and improve reaction stability.

Active Publication Date: 2012-03-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common shortcoming of all above-mentioned catalysts is that under the higher molar ratio of benzyl alcohol, generally 4~5: 1, just can obtain better conversion rate and selectivity

Method used

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  • Alkylation method of benzene and ethanol
  • Alkylation method of benzene and ethanol
  • Alkylation method of benzene and ethanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Mix and stir 162 grams of silica sol (40% by weight), 14 grams of aluminum sec-butoxide, and 322 grams of dimethyl diethylammonium hydroxide (20% by weight), and age at 100° C. for 18 hours. Cool, for the precursor solution. The molar ratio of each component in the mixture is SiO 2 / Al 2 o 3 =40,H 2 O / SiO 2 =18, R / SiO 2 = 0.5.

[0019] With 2.2 grams of sodium hydroxide, 16 grams of silica sol (40% by weight), 1.4 grams of aluminum sec-butoxide, 10 grams of precursor solution, 26 grams of distilled water, mix and stir evenly, the molar ratio of each component is SiO 2 / Al 2 o 3 =36,H 2 O / SiO 2 =20,OH - / SiO 2 = 0.43. Raise the temperature to 160°C for crystallization of the above mixture. After 48 hours of crystallization, cool the crystallization tank to room temperature, take out the crystallization liquid, centrifuge, wash and filter, and put the product in an oven for 8 hours at 100°C. . The X-ray powder diffraction data are shown in Table 1.

[0020...

Embodiment 2

[0025]Mix and stir 162 grams of silica sol (40% by weight), 14 grams of aluminum sec-butoxide, and 322 grams of dimethyl diethylammonium hydroxide (20% by weight), and age at 100° C. for 18 hours. Cool, for the precursor solution. The molar ratio of each component in the mixture is SiO 2 / Al 2 o 3 =40,H 2 O / SiO 2 =18, R / SiO 2 = 0.5.

[0026] 2.2 grams of sodium hydroxide, 16 grams of silica sol (40% by weight), 0.7 grams of aluminum sec-butoxide, 9 grams of precursor solution, and 26 grams of distilled water were mixed and stirred evenly, and the molar ratio of each component was SiO 2 / Al 2 o 3 =65,H 2 O / SiO 2 =19,OH - / SiO 2 = 0.43. Raise the temperature to 160°C for crystallization of the above mixture. After 48 hours of crystallization, cool the crystallization tank to room temperature, take out the crystallization liquid, centrifuge, wash and filter, and put the product in an oven for 8 hours at 100°C. . The X-ray powder diffraction data are shown in Table ...

Embodiment 3

[0032] Mix 170 grams of tetraethyl orthosilicate, 5 grams of aluminum sec-butoxide, 151 grams of ethyltrimethylammonium hydroxide (20% by weight), and 80 grams of distilled water to form a mixture I, stir well, and age at 100° C. After 16 hours of cooling, it is the precursor solution. The molar ratio of each component in the mixture is SiO 2 / Al 2 o 3 =80,H 2 O / SiO 2 =21, R / SiO 2 = 0.25.

[0033] Mix and stir 1.3 grams of sodium hydroxide, 20 grams of tetraethyl orthosilicate, 1.0 grams of aluminum isopropoxide, 12 grams of precursor solution, and 50 grams of distilled water, and the molar ratio of each component is SiO 2 / Al 2 o 3 =44,H 2 O / SiO 2 =26,OH - / SiO 2 =0.27. Raise the temperature to 160°C for crystallization of the above mixture. After 56 hours of crystallization, cool the crystallization tank to room temperature, take out the crystallization liquid, centrifuge, wash and filter, and put the product in an oven to dry at 100°C for 8 hours. . The X-ray...

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Abstract

The invention relates to an alkylation method of benzene and ethanol and mainly solves the problem of high ratio of benzene to alcohol in a catalyst used in previous technologies. The technical scheme adopted in the invention is as follows: benzene and ethanol are used as reaction materials; the reaction temperature is 150-300 DEG C; the mol ratio of benzene to ethanol is 1-4: 1; the weight space velocity of ethanol is 0.1-10h<-1>; and the reaction materials contact with the catalyst. The catalyst comprises the following components of: by weight, a) 30-90 parts of a porous material; b) 10-70 parts of alumina. The porous material contains the following composition Al2O3: nSiO2, wherein n is 2-120. There is the maximum value of distance d at the 13.1+ / -0.2, 12.3+ / -0.1, 10.9+ / -0.3, 4.4+ / -0.2, 4.0+ / -0.3, 3.5+ / -0.1 and 3.4+ / -0.1 in the XRD spectrum of the porous material. The technical scheme greatly solves the problem and can be used in the industrial production of ethylbenzene.

Description

technical field [0001] The invention relates to a method for alkylation of benzene and ethanol. Background technique [0002] Ethylbenzene is an important chemical raw material, mainly used in the production of polystyrene monomer - styrene. In addition, ethylbenzene is also widely used in the industrial production of ethylbenzene, mainly using benzene and ethylene as raw materials, using AlCl3-HCl complex as a catalyst (Cat) liquid-phase alkylation method (aluminum trichloride method). At present, large-scale ethylbenzene production units use ethylene as the alkylating agent. In areas where there is no petroleum ethylene source, in order to alleviate the shortage of styrene, ethanol dehydration can be used to produce ethylene, and alkylation can be used to produce ethylbenzene. The raw material ethanol can come from the comprehensive utilization of agricultural and sideline products, and can also be produced from coal and natural gas. [0003] At present, acidic zeolites...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C15/073C07C2/86B01J21/12B01J35/10
CPCY02P20/52
Inventor 贾银娟刘志成高焕新
Owner CHINA PETROLEUM & CHEM CORP
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