تفاعل #461550

معادلة التفاعل

2-butyl-2-ethyl-4-cyanobutanal

ammonia

→

2-butyl-2-ethylpentane-1,5-diamine

المردود 93.9%

المذيبات

hydrogen

ظروف التفاعل

المعالجة

1. 1
   أخرىto top at 250 bar and 80° C. through a tubular reactor
2. 2
   درجة الحرارة(diameter 16 mm, fill level 50 cm, oil-heated twin jacket) upstream of the hydrogenation reactor
3. 3
   أخرىto top at 250 bar and 110° C
4. 4
   أخرىthe ammonia was removed by distillation
5. 5
   أخرىThe product from 48.0 hours was separated by fractional distillation on a 30 cm

الإجراء التجريبي

20.0 g per hour of 2-butyl-2-ethyl-4-cyanobutanal (purity 99.3%, 0.11 mol) and 140 g (230 ml, 8.23 mol) per hour of liquid ammonia were pumped from bottom to top at 250 bar and 80° C. through a tubular reactor (diameter 16 mm, fill level 50 cm, oil-heated twin jacket) upstream of the hydrogenation reactor and filled with 70.0 g (100 ml) of γ -Al2O3 in the form of 1.5 mm pellets. 60 l(S.T.P.)/h of hydrogen were then fed in, and the product stream from the upstream imination reactor was passed through the hydrogenation reactor from bottom to top at 250 bar and 110° C. The product stream was decompressed to atmospheric pressure and the ammonia was removed by distillation. According to gas-chromatographic analysis, the hydrogenation product stream contained 95.4% of 2-butyl-2-ethylpentane-1,5-diamine and 2.3% of 3-butyl-3-ethylpiperidine. The product from 48.0 hours was separated by fractional distillation on a 30 cm packed column (3 mm glass rings), giving 920 g of 2-butyl-2-ethylpentane-1,5-diamine, corresponding to a yield of 93.9% of theory.

المصدر