PURIFICATION OF CYCLOTETRAMETHYLENE TETRANITRAMINE

1. A process for the purification of cyclotetramethylene tetranitramine which comprises heating a portion of crude cyclotetramethylene tetranitramine in the presence of linear nitramines in acetic acid, the acid concentration being at least 98 percent, to a temperature of from about 50 to 98 DEG C., maintaining the resulting slurry for a period of about 15-45 minutes at said temperature from about 50 to 98 DEG C., cooling the slurry to a temperature of about 30 to 40 DEG C., adding to said slurry a new increment of said crude cyclotetramethylene tetranitramine, repeating the same cycle for a series of from 5 to 10 increment additions, and recovering a cyclotetramethylene tetranitramine product of high purity.