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Preparation method of phenylmethylamine

A technology for benzylamine and benzonitrile, applied in the field of preparation of benzylamine, can solve the problems of high catalyst loss, low production efficiency, high labor intensity, etc., and achieves avoiding high catalyst loss, meeting environmental protection requirements, and achieving good technical effects. Effect

Active Publication Date: 2015-04-29
SHANGHAI HUAYI GRP CO
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is the problem of high catalyst loss, low production efficiency and high labor intensity of intermittent operation in the prior art, and a new preparation method of benzylamine is provided

Method used

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  • Preparation method of phenylmethylamine
  • Preparation method of phenylmethylamine
  • Preparation method of phenylmethylamine

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Catalyst preparation: Weigh 3.33g of palladium chloride, add 100g of deionized water to make solution A, take 5g of the above solution and add it into deionized water, add concentrated hydrochloric acid dropwise to adjust the pH of the solution to 0, impregnate until 20g has been broken to 30-50 mesh γ-Al 2 o 3 On the aluminum oxide carrier of type, make the content of metal palladium in the catalyst be 0.5wt%. The support impregnated with the palladium component was dried at 120° C. for 12 h. The dried catalyst was calcined at 500° C. for 4 h in an air atmosphere to obtain a catalyst precursor. Save for later.

[0025] Put the prepared catalyst into a stainless steel fixed-bed reactor with an inner diameter of φ12mm, control the reaction temperature at 40-130°C, and the mass space velocity of benzonitrile at 0.5-3.6h -1 , the weight ratio of the benzonitrile to the solvent is 99:1, and the weight ratio of the part of the product material entering the mixing unit to...

Embodiment 2

[0029] According to the conditions and steps described in Example 1, the weight ratio of the part of the product material entering the mixing unit to benzonitrile is 1:1, and the reaction results are shown in Table 1.

Embodiment 3

[0031] According to the conditions and steps described in Example 1, the solvent is ethanol, and the weight ratio of benzonitrile to ethanol is 1:1. The reaction results are shown in Table 1.

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Abstract

The invention relates to a preparation method of phenylmethylamine. The technical scheme adopted by the invention for mainly solving the problems of high catalyst loss, low production efficiency and high intermittent operation labor intensity is as follows: the preparation method of the phenylmethylamine comprises the following steps: mixing the raw material of cyanobenzene with a solvent material or at least one of one part of product materials in a mixing unit, introducing the mixture into a fixed bed hydrogenation reactor to be in contact with hydrogen and a catalyst and carry out multi-phase continuous hydrogenation reaction to obtain a product material containing phenylmethylamine, separating the product material to obtain a phenylmethylamine product, wherein the catalyst is a metal loaded catalyst; and the metal is selected from at least one of Pd, Pt, Cu, Ni, Mo and Fe. The preparation method can be used for preparing phenylmethylamine.

Description

technical field [0001] The present invention relates to a kind of preparation method of benzylamine. Background technique [0002] In modern industrial production, aromatic primary amines are a class of important chemical intermediates, and benzylamine (benzylamine) is one of the most important products. [0003] Benzylamine has strong basicity, and can interact with phenol, formic acid, p-cresol, etc. to form addition products; Benzylamine can also react with acid chloride, acid anhydride or ester, aldehyde, ketone, halogenated hydrocarbon, , anhydrides or esters react to generate N-benzylamide, react with halogenated hydrocarbons to generate N-substituted benzylamine, and react with aldehydes and ketones to generate N-benzyl imine; at the same time, benzylamine is an important organic chemical raw material and fine Chemical intermediates, can be widely used in synthetic drugs (medicine and pesticides), dyes, artificial resins, anti-corrosion inhibitors and functional addi...

Claims

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Application Information

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IPC IPC(8): C07C211/27C07C209/48B01J23/44B01J23/89
Inventor 戴成勇朱舒雅宁春利李永刚廖湘洲张春雷
Owner SHANGHAI HUAYI GRP CO
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