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Catalyst for preparing 2,6-diisopropyl aniline

A diisopropylaniline and catalyst technology, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, can solve the problem of low space velocity, diisopropylaniline Low yield and other problems, to achieve the effect of improved catalytic performance, good conversion rate and selectivity

Inactive Publication Date: 2004-01-14
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 to overcome the low applicable space velocity of the catalyst in the prior art, only 0.1 hours -1 , the problem of low yield of the product 2,6-diisopropylaniline, providing a new catalyst for the preparation of 2,6-diisopropylaniline

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0019] The catalyst preparation process is the same as in Example 1. 20 grams of the prepared catalyst are put into a stainless steel miniature fixed-bed reactor with a diameter of 20 mm, and 2,6-diisopropylphenol, ammonia and hydrogen are introduced. Reaction temperature 220 ℃, reaction pressure 1.5MPa, the feed rate of 2,6-diisopropylphenol is 7 grams / hour, the flow velocity of ammonia is 6 grams / hour, the flow velocity 60 milliliters / minute of hydrogen, 2,6- The conversion rate of diisopropylphenol was 95.9%, and the selectivity of 2,6-diisopropylaniline was 91.8%. [Example 3]

Embodiment 3

[0020] Catalyst preparation process and evaluation condition are the same as embodiment 1, but change cocatalyst La(NO 3 ) 3 The addition amount of Pd (0.5% by weight)-La (0.15% by weight / γ-Al 2 o 3 catalyst. Reaction temperature 220 ℃, reaction pressure 1.5MPa, the feed rate of 2,6-diisopropylphenol is 7 grams / hour, the flow rate of ammonia 6 grams / hour, the flow rate of hydrogen 60 milliliters / minute, 2,6-diisopropylphenol The conversion rate of isopropylphenol was 95.3%, and the selectivity of 2,6-diisopropylaniline was 91.6%. 【Example 4】

Embodiment 4

[0021] The catalyst preparation process and evaluation conditions are the same as in Example 2, except that the catalyst is composed of Pd (0.1% by weight)-La (0.05% by weight) / γ-Al 2 o 3 , The conversion rate of 2,6-diisopropylphenol was 93.8%, and the selectivity of 2,6-diisopropylaniline was 89.9%. 【Example 5】

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PUM

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Abstract

A catalyst for preparing 2,6-diisopropyl phenylamine is composed of gamma-alumina as carrier, and the active component chosen from Pd, La and their oxides. Its advantages are high space speed and high output rate of 2,6-diisopropyl phenylamine.

Description

technical field [0001] The invention relates to a catalyst for preparing 2,6-diisopropylaniline, in particular to a catalyst for preparing 2,6-diisopropylaniline by gas-phase catalytic amination of 2,6-diisopropylphenol. Background technique [0002] 2,6-Diisopropylaniline is an important fine chemical intermediate widely used in pesticide, medicine, plastic, dyestuff and food additive industries. Its synthesis methods mainly include aniline alkylation method and 2,6-diisopropylphenol amination method. The alkylation method is divided into liquid phase method and gas phase method. The liquid-phase method developed by Bayer requires high temperature and high pressure. Air Products and Chemicals has developed a gas phase method, but the selectivity is too poor. Nobert (EP53819, DE 3425629) of BASF Company has developed gas-phase amination method to prepare 2,6-diisopropylaniline, adopts Pd / spinel catalyst, and reaction temperature is 200 ℃, product 2...

Claims

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Application Information

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IPC IPC(8): B01J23/44
Inventor 谢在库姜瑞霞陆贤陈庆龄
Owner CHINA PETROLEUM & CHEM CORP
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