发明名称 |
Process for preparing piperazine |
摘要 |
Process for preparing piperazine of the formula I;
by reacting diethanolamine (DEOA) of the formula II
;
with ammonia in the presence of hydrogen and a supported, metal-containing catalyst has been found, wherein the catalytically active mass of the catalyst, prior to its reduction with hydrogen, comprises oxygen-containing compounds of aluminum, copper, nickel and cobalt and in the range from 0.2 to 5.0% by weight of oxygen-containing compounds of tin, calculated as SnO, and the reaction is carried out in the liquid phase at an absolute pressure in the range from 160 to 220 bar, a temperature in the range from 180 to 220° C., using ammonia in a molar ratio to DEOA used of from 5 to 25 and in the presence of 0.2 to 9.0% by weight of hydrogen, based on the total amount of DEOA used and ammonia. |
申请公布号 |
US8981093(B2) |
申请公布日期 |
2015.03.17 |
申请号 |
US201313910554 |
申请日期 |
2013.06.05 |
申请人 |
BASF SE |
发明人 |
Bou Chedid Roland;Melder Johann-Peter;Abel Ulrich;Dostalek Roman;Challand Nina;Stein Bernd;Jödecke Michael |
分类号 |
C07D295/023;C07D241/04;C07C209/28;C07C213/04;C07D295/027 |
主分类号 |
C07D295/023 |
代理机构 |
Drinker Biddle & Reath LLP |
代理人 |
Drinker Biddle & Reath LLP |
主权项 |
1. A process for preparing piperazine of the formula I by reacting diethanolamine (DEOA) of the formula II with ammonia in the presence of hydrogen and a supported, metal-containing catalyst,wherein the catalytically active mass of the catalyst, prior to its reduction with hydrogen, comprises
a) oxygen-containing compounds of cobalt, b) 0.2 to 5.0% by weight of oxygen-containing compounds of tin, calculated as SnO, c) 15 to 80% by weight of oxygen-containing compounds of aluminum, calculated as Al2O3, d) 1.0 to 20% by weight of oxygen-containing compounds of copper, calculated as CuO, and e) 5.0 to 35% by weight of oxygen-containing compounds of nickel, calculated as NiO;wherein the reaction is carried out in the liquid phase at an absolute pressure in the range from 160 to 220 bar, a temperature in the range from 180 to 220° C.,wherein the molar ratio of ammonia to DEOA is from 5 to 25, andwherein hydrogen is present at from 0.2 to 9.0% by weight based on the total weight of DEOA and ammonia. |
地址 |
Ludwigshafen DE |