Diaminoalkane syntheses via selective amination of hydroxyaldehydes
First Claim
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1. A process for the production of diaminoalkanes which comprises:
- introducing into a reactor one or more by hydroxyalkanals;
reacting said hydroxyalkanal in the presence of excess ammonia and hydrogen and in the presence of a catalyst comprising at least one metal selected from nickel or cobalt, or a mixture thereof, optionally on a support or as a bulk-metal catalyst;
reacting said hydroxyalkanal at a temperature of from 140°
C. to 180°
C. at a pressure of at least 500 psi; and
separating the diaminoalkane product.
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Abstract
Disclosed is a process for producing diaminoalkanes which comprises reacting a hydroxyalkanal characterized by two to six carbons, preferably 3-hydroxypropanal, with excess ammonia and sufficient hydrogen to stabilize a nickel or cobalt-containing hydroamination catalyst, at a temperature of at least 50° C. and a pressure of at least 500 psig, until there is substantial formation of the desired diaminoalkane, wherein said catalyst comprises at least one metal selected from the group consisting of nickel and cobalt, or mixtures thereof, optionally in the presence of one or more promoters.
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Citations
27 Claims
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1. A process for the production of diaminoalkanes which comprises:
introducing into a reactor one or more by hydroxyalkanals;
reacting said hydroxyalkanal in the presence of excess ammonia and hydrogen and in the presence of a catalyst comprising at least one metal selected from nickel or cobalt, or a mixture thereof, optionally on a support or as a bulk-metal catalyst;
reacting said hydroxyalkanal at a temperature of from 140°
C. to 180°
C. at a pressure of at least 500 psi; and
separating the diaminoalkane product.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 24, 25, 26, 27)
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18. A two-step process for the production of 1,3-diaminopropane which comprises:
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a) introducing into a reactor 3-hydroxypropanal, reacting said 3-hydroxypropanal in the presence of excess ammonia and hydrogen and in the presence of a nickel catalyst at a temperature of at least 50°
C. and a pressure of at least 500 psi;
generating an intermediate comprising 3-amino-1-propanol,b) reacting said 3-amino-1-propanol in the presence of excess ammonia and hydrogen and in the presence of a cobalt catalyst, at a temperature of 140 to 200°
C. and a pressure of 1000 to 3000 psi; and
isolating said 1,3-diaminopropane. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification