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Method for producing isopropylbenzene in liquid phase alkylation manner

A technology of cumene and alkylation, which is applied in the production of bulk chemicals, chemical instruments and methods, organic chemistry, etc., can solve problems such as poor catalyst stability, achieve improved reaction stability, good technical effects, and suppress carbon deposition Effect

Active Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is the problem of poor catalyst stability in the prior art, and a new method for producing cumene by liquid-phase alkylation is provided

Method used

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  • Method for producing isopropylbenzene in liquid phase alkylation manner
  • Method for producing isopropylbenzene in liquid phase alkylation manner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 600g 40% silica sol, 38.9g sodium aluminate (alumina content 42%), 70.6g 25% tetraethylammonium hydroxide (TEAOH), 5.0g diethylamine (DEA), 168.0g tetraethyl bromide Ammonium (TEABr), 16.0 g of sodium hydroxide, 136.0 g of 25% ammonium hydroxide, and 925.1 g of water were mixed and stirred evenly at room temperature. Then, transfer to a stainless steel autoclave, the crystallization temperature is 140° C., and react for 72 hours. After the reaction, the crystalline product was filtered, washed and dried. Among them, SiO in molar ratio in the reaction mixture 2 / Al 2 o 3 =25, TEAOH / SiO 2 =0.03, DEA / SiO 2 =0.03, TEABr / SiO 2 =0.2, NaOH / SiO 2 =0.1, NH 4 OH / SiO 2 =0.5,H 2 O / SiO 2 = 20, R1 / R2 = 0.3.

[0015] The crystalline product obtained by XRD powder diffraction analysis of the product is Beta zeolite, and the crystal grain diameter is 10-40 nanometers according to transmission electron microscope TEM analysis.

Embodiment 2

[0017] Synthetic method is the same as [Example 1], but SiO is calculated in molar ratio in the reaction mixture 2 / Al 2 o 3 =15, TEAOH / SiO 2 =0.05, DEA / SiO 2 = 0, TEABr / SiO 2 =0.20, NaOH / SiO 2 =0.02, NH 4 OH / SiO 2 =0.8,H 2 O / SiO 2 =12, R1 / R2==0.25. The crystallization temperature was 150°C, and the reaction was 55 hours.

[0018] The crystalline product obtained by XRD powder diffraction analysis of the product is Beta zeolite, and the crystal grain diameter is 10-40 nanometers according to transmission electron microscope TEM analysis.

Embodiment 3

[0020] Synthetic method is the same as [Example 1], just replace diethylamine (DEA) with triethylamine (TrEA), and SiO is counted in molar ratio in the reaction mixture 2 / Al 2 o 3 =40, TEAOH / SiO 2 =0.02, TrEA / SiO 2 = 0.1, TEABr / SiO 2 =0.20, NaOH / SiO 2 =0.00, NH 4 OH / SiO 2 = 1.0, H 2 O / SiO 2 =15, R1 / R2==0.6. The crystallization temperature was 155°C, and the reaction was 45 hours.

[0021] The crystalline product obtained by XRD powder diffraction analysis of the product is Beta zeolite, and the crystal grain diameter is 10-40 nanometers according to transmission electron microscope TEM analysis.

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Abstract

The invention relates to a method for producing isopropylbenzene in a liquid phase alkylation manner and mainly solves the problem that a catalytic agent in the prior art has poor stability. The method better solves the problem and can be applied to the industrial production of isopropylbenzene in a liquid phase alkylation manner of benzene and propylene by adopting the technical scheme as follows: with benzene and propylene as reactive raw materials, leading the reactive raw materials and the catalytic agent to contact with each other to be synthesized into the isopropylbenzene under the conditions of the reaction temperature of 100-200 DEG C, the reaction pressure of 1.5-4.0MPa, benzene / propylene molar ratio of 1.0-4.0 and propylene weight hourly space velocity of 0.8-8.0h <-1>, wherein the used catalytic agent comprises the following components in parts by weight: (a) 40-90 parts of Beta zeolite with the grain diameter of 1-100 nanometer and (b) 10-60 parts of binding agent.

Description

technical field [0001] The invention relates to a method for producing cumene by liquid-phase alkylation. Background technique [0002] Nano Beta zeolite can be used as catalyst. As early as 1967, US Patent No. 3,308,069 introduced the synthesis of conventional Beta zeolite using tetraethylammonium hydroxide as a template. The crystal grain of Beta zeolite synthesized by this method is larger than 1 micron; in addition, because tetraethylammonium hydroxide is completely used as template agent, the cost is relatively high. U.S. Patent No. 5,672,799 describes a synthesis method of Beta zeolite for the alkylation of propylene and benzene, which is modified by introducing metal ions. Microporous and Mesoporous Materials, 2003, Vol 6, P21 introduced the synthesis method of Beta zeolite with mesoporous features. Acta Catalytica Sinica (2000, Vol21 No1, P75) introduced a method for synthesizing Beta zeolite in a F-containing system, but the crystal grains of the synthesized Beta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C15/085C07C2/66C01B39/04B01J29/70
CPCY02P20/52
Inventor 高焕新周斌魏一伦顾瑞芳方华季树芳姚晖
Owner CHINA PETROLEUM & CHEM CORP
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