| http://www.w3.org/ns/prov#value | - According to the invention, the first step (step 1) involves heating at least one aminonitrile with water at a temperature from about 90 to about 400??? C., preferably about 180 to about 310??? C., especially about 220 to about 270??? C., to which a pressure from about 0.1 to about 15???106 Pa, preferably about 1 to about 10???106 Pa, especially about 4 to about 9???106 Pa, is set.
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