ChemicalBook CAS DataBase List Dicyclohexylamine

Dicyclohexylamine synthesis

13synthesis methods

Product Name:Dicyclohexylamine
CAS Number:101-83-7
Molecular formula:C12H23N
Molecular Weight:181.32

Several methods are employed for the manufacture of dicyclohexylamine. It can be manufactured by hydrogenation of equimolar amounts of cyclohexanone and cyclohexylamine. Alternatively, dicyclohexylamine can be prepared by vapor phase catalytic hydrogenation of aniline at elevated temperature and pressure. Fractionation of the crude reaction product yields cyclohexylamine, unreacted aniline, and a high boiling residue comprised of N-phenylcyclohexylamine and dicyclohexylamine (Windholz et al 1983).

62-53-3 Synthesis

62-53-3
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110-82-7 Synthesis

110-82-7
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108-91-8 Synthesis

108-91-8
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101-83-7
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110-83-8
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Yield:108-91-8 98.4% ，101-83-7 0.08%

Reaction Conditions:

with ammonia;hydrogen at 180 - 200;

Steps:

6 Example 6

The hydrogenation was carried out as described in Example 5 except that additionally anhydrous ammonia was continuously metered in. Based on 100 wt.-% of aniline 10 parts by weight of ammonia were added. As a function of reaction temperature the following product compositions were attained under steady-state reaction conditions:18099.30.08-0.0720098.40.8-0.091)CHA = cyclohexylamine; 2)DCHA = dicyclohexylamine

References:

US6388149,2002,B2 Location in patent:Page column 18