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Method for producing ethylbenzene by performing vapor phase alkylation on ethanol and benzene

A technology of alkylation and ethanol, applied in chemical instruments and methods, organic chemistry, molecular sieve catalysts, etc., can solve the problem of low ethylbenzene selectivity and achieve good technical effects

Active Publication Date: 2013-05-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is the problem of low selectivity of ethylbenzene in the prior art, and a new method for producing ethylbenzene by vapor-phase alkylation of ethanol and benzene is provided

Method used

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  • Method for producing ethylbenzene by performing vapor phase alkylation on ethanol and benzene
  • Method for producing ethylbenzene by performing vapor phase alkylation on ethanol and benzene

Examples

Experimental program
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Effect test

Embodiment 1

[0021] 50g SiAl Molar Ratio SiO 2 / Al 2 o 3 =200, the grain size is 150 nanometers, and the diameter is the binderless ZSM-5 molecular sieve catalyst of Φ1.8 millimeters, exchanged three times with 0.5 liters of hydrochloric acid of 0.1 mol / liter at 85 ° C, washed with deionized water until no chloride radicals, Dry at 110°C, and then bake at 580°C for 4 hours before use.

[0022] 20 grams of the above catalyst and 40 milliliters of 0.4 mol / liter lanthanum nitrate aqueous solution were impregnated at room temperature for 4 hours, then dried at 110 ° C for 10 hours, and then calcined at 550 ° C for 4 hours, the obtained catalyst contained La 2 o 3 2.0% by weight.

[0023] Treat the above catalyst with water vapor at 580°C under normal pressure for 3 hours, and then treat it with 1.5 mol / liter phosphoric acid solution at 50°C for 5 hours. hours, the finished catalyst was obtained.

Embodiment 2～10

[0025] With [embodiment 1], just change the SiO of catalyst 2 / Al 2 o 3 Molar ratio, binder-free ZSM-5 molecular sieve grain size, catalyst containing La 2 o 3 amount, steam treatment and phosphoric acid treatment conditions. See Table 1 for details.

Embodiment 11

[0027] Same as [Example 1], but the catalyst contains Ce 2 o3 2.0% by weight.

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Abstract

The invention relates to a method for producing ethylbenzene by performing vapor phase alkylation on ethanol and benzene and mainly solves the problem of low ethylbenzene selectivity in the prior art. The problem is solved by adopting the technical scheme that ethanol and benzene which are used as reaction raw materials and a catalyst contact under the conditions that the reaction temperature is 300 to 460 DEG C, the reaction pressure is 0.5 to 2.8MPa, the weight space velocity of ethanol is 0.1 to 5.0 hours<-1>, and the molar ratio of benzene to ethanol is 2 to 10 to perform vapor phase alkylation reaction so as to generate ethylbenzene; the used catalyst contains the following components in percentage by weight: 90 to 99.9 percent of adhesive-free ZSM-5 molecular sieve of which the silicon-to-aluminum (SiO2 / Al2O3) molar ratio is 30 to 400 and the grain diameter is 5 to 350 nanometers, and 0.1 to 10 percent of rare-earth metallic oxide. The method can be used for industrial production of preparing ethylbenzene by performing vapor phase alkylation on ethanol and benzene.

Description

technical field [0001] The invention relates to a method for producing ethylbenzene by vapor-phase alkylation of ethanol and benzene. Background technique [0002] Ethylbenzene is an important petrochemical raw material, mainly used in the production of styrene, which is the main raw material for the production of polystyrene and other copolymer resins. Ethylbenzene can be produced by various processes, mainly traditional AlCl 3 There are two types of liquid-phase alkylation method and molecular sieve alkylation method, among which the molecular sieve alkylation production process has achieved great success. In the 1980s, Mobil and Badger successfully launched the gas-phase alkylation process of molecular sieves to produce ethylbenzene. This process uses ZSM-5 zeolite as the catalyst, and has the advantages of no corrosion, no pollution, simple process and high heat recovery rate. The US patent This has been described in detail in US3751504, US3751506, US4016218 and US4547...

Claims

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Application Information

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IPC IPC(8): C07C15/073C07C2/88B01J29/40
Inventor 孙洪敏沈震浩张斌宦明耀杨为民
Owner CHINA PETROLEUM & CHEM CORP
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