Catalyst for preparing 1,3-cyclohexanebis(methylamine) by m-xylylenediamine hydrogenation under ammonia reaction conditions

A m-xylylenediamine and catalyst technology, applied in the field of catalysts, can solve the problem of low selectivity of the target product, only 58%

Inactive 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

Among them, USP 6,045,920, 6,215,030 and 6,245,920 disclose the use of Raney Ru as a hydrogenation catalyst to convert isophthalonitrile into 1,3-cyclohexanedimethylamine patents, but the yield is only 58%. Japanese Patent 42-26783 discloses the use of Ru is a catalyst, using water or an aqueous organic acid as a solvent to hydrogenate m-xylylenediamine to 1,3-cyclohexanedimethylamine, but the selectivity of the target product is low

Method used

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  • Catalyst for preparing 1,3-cyclohexanebis(methylamine) by m-xylylenediamine hydrogenation under ammonia reaction conditions

Examples

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Embodiment 1

[0022] The catalyst of embodiment 1 is 5%Ru-5%Ni / Al 2 o 3 . Weigh 9.0 g of Al 2 o 3 (20-40 mesh), configuration 15ml contains 1.2933 grams of RuCl 3 ·3H 2 O, 2.4647 g Ni(NO 3 ) 2 ·6H 2 O aqueous solution, impregnating the above Al with this aqueous solution 2 o 3 The carrier was air-dried, oven-dried at 120°C for 4 hours, and baked at 400°C for 4 hours.

Embodiment 2

[0024] Catalyst 5%Ru-5%Ni / coconut shell charcoal of Example 2. Except weighing 9.0 grams of coconut shell charcoal (20-40 mesh (soaked in 3% nitric acid and boiled for 4 hours before use, washed with distilled water to about pH=7.0, dried at 120°C for 6 hours) and no longer roasted, the rest of the preparation steps Same as Example 1.

Embodiment 3

[0026] Catalyst 5%Ru-5%Ni / SiO of Example 3 2 . In addition to weighing 9.0 g of SiO 2 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 1,3-cyclohexanebis(methylamine) by m-xylylenediamine hydrogenation under ammonia reaction conditions. The catalyst realizes the transformation of m-xylylenediamine and hydrogen into 1,3-cyclohexanebis(methylamine) under ammonia reaction conditions and comprises one or more main active components, one or more auxiliary agents and a carrier. The one or more main active components is / are precious metal Ru or / and Pd. The one or more auxiliary agents are selected from Ni, Cr, Co, Fe and their oxides. The carrier is Al2O3, active carbon 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 m-xylylenediamine and hydrogen into a plurality of amine products comprising 1,3-cyclohexanebis(methylamine) as a main product is realized.

Description

technical field [0001] The invention relates to a catalyst for preparing 1,3-cyclohexanedimethylamine by hydrogenation of m-xylylenediamine under the condition of ammonia, and relates in detail to a catalyst for the reaction of m-xylylenediamine and hydrogen under the condition of ammonia. A catalyst for the conversion of 1,3-cyclohexanedimethylamine under ammonia conditions. technical background [0002] 1,3-cyclohexanedimethylamine, also known as 1,3-diaminomethylcyclohexane or 1,3-bis(aminomethyl)cyclohexane, English name: 1,3-Cyclohexanebis(methylamine), is An alicyclic amine, 1,3-cyclohexanedimethylamine is a colorless transparent liquid. It is an epoxy resin curing agent with excellent performance and wide application. It has excellent yellowing resistance, good toughness and fast curing speed. It can be used in epoxy curing agent; floor paint, especially in occasions that require high color stability; civil engineering adhesives; polyamide; polyurethane chain extens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J23/652B01J37/18B01J37/08B01J35/10C07C211/18C07C209/72
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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