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Catalyst for production of ethyl benzene using ethylene and benzene and its preparation method and application

A catalyst and ethylene technology, applied in catalyst activation/preparation, molecular sieve catalysts, physical/chemical process catalysts, etc., can solve problems such as increasing production equipment investment

Inactive Publication Date: 2005-03-09
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of AlCl 3 As a catalyst, it not only requires the reaction device to be corrosion-resistant, but also increases the investment in production equipment, and will cause serious environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: get SiO 2 / Al 2 o 3 30 MCM-22 molecular sieve and Al 2 o 3 The powder is kneaded and extruded according to the weight ratio of 70:30, dried at 120°C and then roasted at 540°C for 5 hours; the obtained strips are exchanged twice with ammonium salt solution at 80-90°C, and then washed with deionized water To neutral, dry at 120°C; vacuum impregnate the dried product with 0.6% HF solution; after impregnation, the strips are dried at 120°C and roasted at 470°C for 2 hours, then treated with saturated water vapor at 310°C After 2 hours, the finished catalyst A was obtained. The F content in the catalyst is 0.98%, Na 2 The O content is 0.02%, and the total acid content per gram of catalyst is (acid centers corresponding to ammonia desorption at 150-600°C) 11.5×10 20 Among them, the ratio of medium strong acid center (acid center for ammonia desorption at 330-600°C) and weak acid center (acid center for ammonia desorption at 150-330°C) is 55:45.

Embodiment 2

[0035] Embodiment 2: take SiO 2 / Al 2 o 3 23 MCM-22 molecular sieve and clay powder are kneaded and extruded according to the weight ratio of 50:50, dried at 120°C and then roasted at 540°C for 4 hours; exchange the obtained strips with ammonium salt solution at 80-90°C 4 times, then washed with deionized water until neutral, dried at 120°C; vacuum impregnated the aforementioned dried product with 0.5% HCl solution; dried at 120°C after impregnation, and then roasted at 470°C for 2 hours , treated with saturated water vapor at 310°C for 2 hours to obtain the finished catalyst B. The content of Cl in the catalyst is 0.3%, Na 2 The O content is 0.01%, and the total acid content per gram of catalyst is (acid centers corresponding to ammonia desorption at 150-600°C) 9.5×10 20 One, wherein the ratio of medium-strong acid center (acid center for ammonia desorption at 330-600°C) and weak acid center (acid center for ammonia desorption at 150-330°C) is 50:50.

Embodiment 3

[0036] Embodiment 3: get SiO 2 / Al 2 o 3 39 MCM-22 molecular sieve and Al 2 o 3 The powder is kneaded and extruded according to the weight ratio of 80:20, dried at 120°C and then roasted at 540°C for 3 hours; the obtained strips are exchanged twice with ammonium salt solution at 80-90°C, and then washed with deionized water To neutral, after drying at 120°C, vacuum impregnate the dried product with 0.8% HF solution; after impregnation, the strips are dried at 120°C and roasted at 470°C for 2 hours, then heated at 320°C with saturated water vapor After 2 hours of treatment, the finished catalyst C was obtained. The F content in the catalyst is 1.2%, Na 2 The O content is 0.01%, and the total acid content per gram of catalyst is (acid centers corresponding to ammonia desorption at 150-600°C) 14.2×10 20 One, wherein the ratio of medium-strong acid center (acid center for ammonia desorption at 330-600°C) and weak acid center (acid center for ammonia desorption at 150-330°C) ...

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PUM

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Abstract

A catalyst for preparing the high-purity (99.9%) ethylbenzene from ethene and benzene by liquid-phase alkylation and use of fixed-bed reactor, slurry-bed reactor or catalytic distilling reactor is prepared from molecular sieve MCM-22, halogen and inertial component.

Description

technical field [0001] The invention relates to a catalyst used for the liquid-phase alkylation reaction of benzene and ethylene to produce ethylbenzene, in particular to an MCM-22 molecular sieve catalyst used for the liquid-phase alkylation reaction of benzene and ethylene to produce ethylbenzene. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. [0003] The present invention also relates to the application of the above catalyst in the production of ethylbenzene from ethylene and benzene. Background technique [0004] Ethylbenzene is an intermediate product for the production of polystyrene, and styrene is the main raw material for polystyrene and other copolymer resins, ranking third in the world's polyolefin monomer production. At present, the world's styrene production has reached 20 million tons per year. The production of styrene in my country has developed greatly in recent years, from 250,000 tons / year in 1995 to ...

Claims

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Application Information

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IPC IPC(8): B01J29/06B01J37/00C07C2/66C07C15/073
CPCY02P20/52
Inventor 徐龙伢谢素娟王清遐刘盛林
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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