Beta-zeolite catalyst activation method and its uses in ethyl benzene synthesis

An activation method and catalyst technology, which is applied in the field of activation containing zeolite beta catalysis, can solve the problems of not involving the catalyst activation process and difficulty in ensuring the best state of the catalyst.

Inactive Publication Date: 2006-07-19
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the above inventions, the activation process of the catalyst before use...

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 100 grams of beta zeolite raw powder (SiO 2 / Al 2 o 3 27.4, 20% weight loss after roasting at 600°C for 3 hours) mixed with 45.7 grams of SB powder (a kind of pseudo-boehmite imported from Germany, 25% weight loss after roasting at 600 °C for 3 hours) and 2.9 grams of Squatia powder, add appropriate amount of dilute Nitric acid, extruded on the extruder to form a strip-shaped catalyst with a diameter of 1.6 mm, dried overnight at 120°C, and then roasted at 530°C in a muffle furnace for 3 hours, and then used 0.8M NH 4 NO 3 The aqueous solution was exchanged three times at 80-90°C, washed three times with deionized water, dried at 120°C for 4 hours, and calcined at 540°C for 3 hours to obtain the catalyst.

[0020] The reaction evaluation of the catalyst was carried out in a fixed bed reactor with an internal diameter of 12 mm. Sieve the catalyst prepared above into 16-30 mesh particles, put it into the reactor, the loading capacity is about 5 grams, the lower part o...

Embodiment 2

[0023] Adopt the catalyzer described in embodiment 1 and reaction evaluation method, catalyzer is about 3 * 10 in water content -6 (V / V) under a nitrogen atmosphere, the temperature was raised to 550° C. for activation for 1 hour, and the nitrogen space velocity was 800 milliliters / (gram catalyst·hour), and then the raw materials were fed under the reaction temperature to react. Reaction temperature 170°C, reaction pressure 1.5MPa, ethylene weight space velocity 0.2h -1 , Benzene / ethylene=5 (molar ratio). The reaction results were 92.8% ethylene conversion, 80.0% ethylbenzene selectivity, 17.0% diethylbenzene selectivity, and 99.7% ethylation selectivity.

Embodiment 3

[0025] Adopt the catalyzer described in embodiment 1 and reaction evaluation method, catalyzer is about 3 * 10 in water content -6 (V / V) nitrogen atmosphere was warming up to 600°C for activation for 1 hour, and the nitrogen space velocity was 1080 ml / (g catalyst·hour), then the raw material was fed under the reaction temperature and reacted. Reaction temperature 170°C, reaction pressure 1.5MPa, ethylene weight space velocity 0.2h -1 , Benzene / ethylene=5 (molar ratio). The reaction results were 87.9% ethylene conversion, 80.0% ethylbenzene selectivity, 17.2% diethylbenzene selectivity, and 99.7% ethylation selectivity.

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Abstract

The invention discloses an active method of beta zeolite catalyst, which is characterized by the following: adapting inert gas with less than 0.1%(V/V) water content to pass the catalytic bed layer at 100-5000 mg/(g)h , 350-600 Deg C for 0.5-10h; fitting for benzene and ethane alkyl to synthesize ethylbenzene, benzene and diethyl benzene and or multiple ethylbenzene alkyls to produce ethylbenzene.

Description

technical field [0001] The present invention relates to an activation process involving zeolite beta catalysis. [0002] The present invention also relates to the application of the activated catalyst in the alkylation of benzene and ethylene to form ethylbenzene and the transalkylation of benzene and diethylbenzene and / or polyethylbenzene to produce ethylbenzene. Background technique [0003] USP 4891458 discloses a SiO 2 / Al 2 o 3 Compared with other zeolite catalysts, the liquid-phase alkylation or transalkylation process of the hydrogen type or rare earth beta zeolite catalyst with a concentration of 10-100 has the characteristics of high yield of monoalkylation products and long life. [0004] USP 5980859 and USP 5522984 disclose a preparation process of a modified zeolite beta catalyst. After the synthesized raw zeolite beta powder is roasted at 540-650°C to remove the template agent, it is treated with water at 500-800°C and an aqueous ammonium salt solution with ...

Claims

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Application Information

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IPC IPC(8): B01J29/70B01J29/90C07C2/66C07C15/073
CPCY02P20/52Y02P20/584
Inventor 王清遐孙新德徐龙伢刘盛林
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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