Catalyst for preparing m-xylylenediamine by isophthalonitrile hydrogenation under ammonia reaction conditions

A technology of isophthalonitrile and catalysts, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, amino compound preparation, physical/chemical process catalysts, etc., and can solve the problems of catalyst coking and deactivation

Active Publication Date: 2012-09-26
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

A lot of research on this process has been carried out at home and abroad, and it is found that in the hydrogenation process, it undergoes an intermediate step of hydrogenation to generate imines, and imines have high reactivity and are easy to further react with reaction intermediates and products. Through condensation, Ammonolysis, cross-linking and other reactions generate a variety of by-products with high boiling points, which often lead to coking and deactivation of the catalyst

Method used

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  • Catalyst for preparing m-xylylenediamine by isophthalonitrile hydrogenation under ammonia reaction conditions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The catalyst of Example 1 is 10%Ni-5%Cu-5%Cr / diatomaceous earth. Weigh 8.0 grams of diatomite (20-40 mesh), configure 12ml containing 4.9550 grams of Ni (NO 3 ) 3 .6H 2 O, 1.9010 g Cu(NO 3 ) 2 .3H 2 O and 3.8479 g Cr(NO 3 ) 3 .9H 2 O aqueous solution, use this aqueous solution to impregnate the above-mentioned diatomite carrier, air dry naturally, oven dry at 120°C for 4 hours, and bake at 400°C for 4 hours.

Embodiment 2

[0024] Catalyst of Example 2 10%Ni-5%Cu-5%Cr / activated carbon. In addition to weighing 8.0 grams of coconut shell charcoal (20-40 mesh, soaking and boiling in 3% nitric acid for 4 hours before use, washing with distilled water to about pH=7.0, and drying at 120°C for 6 hours) and no longer roasting, the rest of the preparation steps Same as Example 1.

Embodiment 3

[0026] Catalyst 10%Ni-5%Cu-5%Cr / Al of embodiment 3 2 o 3 . In addition to weighing 8.0 g of Al 2 o 3 Except, all the other preparation steps are the same as in Example 1.

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Abstract

The invention discloses a catalyst for preparing m-xylylenediamine by isophthalonitrile hydrogenation under ammonia reaction conditions. The catalyst realizes the transformation of isophthalonitrile and hydrogen into m-xylylenediamine under ammonia reaction conditions and comprises a main active component, one or more auxiliary agents and a carrier. The main active component is a transition metal Ni or Co. The one or more auxiliary agents are selected from Re, Cu, Cr, Ru, Fe and their oxides. The carrier is diatomite, Al2O3 or SiO2. In a fixed bed reactor, at a certain temperature, under the action of ammonia pressure and the catalyst, the high activity and high selectivity transformation of isophthalonitrile and hydrogen into a plurality of amine products comprising m-xylylenediamine as a main product is realized.

Description

technical field [0001] The invention relates to a catalyst for preparing m-xylylenediamine by hydrogenation of isophthalonitrile under the condition of ammonia, and relates in detail to a catalyst for converting isophthalonitrile and hydrogen into m-xylylenediamine under the condition of ammonia. catalyst for methylamine. technical background [0002] M-xylylenediamine is a colorless liquid with an almond smell. It is an epoxy resin curing agent with excellent performance and a wide range of uses. It is also an important fine chemical intermediate and can be used to synthesize polyurethane and xylene nylon resins. 1,3 -Bis(aminomethyl)cyclohexane, serialized epoxy resins, rubber additives, lubricants, paper processing agents, pesticides, fiber finishing agents, rust inhibitors, chelating agents and electronic chemicals, etc. [0003] M-xylylenediamine is prepared by liquid-phase hydrogenation of isophthalonitrile, and isophthalonitrile is prepared by ammoxidation of m-xylen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/86B01J23/889B01J23/89B01J23/755C07C211/51C07C209/48
Inventor 丁云杰王涛严丽吕元马立新
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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