Accession Number : ADD014366

Title :   Synthesis of Dimethylmethylene Dinitramine.

Descriptive Note : Patent filed 1 Jul 82, patented 9 Oct 84,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Shang, Marguerite S ; Oradoff, Robert R

Report Date : 09 Oct 1984

Pagination or Media Count : 5

Abstract : This invention relates to propellants and more particularly to energetic nitramine plasticizers for propellants. One object of this invention is to provide an improved process for preparing 2,4-dinitro-2,4-diazapentane. Other objects of this invention are to provide a safer method of preparing 2,4-dinitro-2,4-diazapentane, to provide a more economical method of preparing 2,4-dinitro-2,4-diazapentane, and to provide a large-scale process for preparing 2,4-dinitro-2,4-diazapentane. These and other objects are accomplished by providing a process comprising the following steps in order: 1) adding N,N-dimethylurea in an organic solvent (e.g., methylene chloride) to mixed acid which is maintained at a temperature which is above the freezing point of mixed acid up to 5 C to produce N,N-dimethyl-N,N-dinitrourea and then drowning the mixed acid solution in ice water; 2) using an organic solvent to extract the N,N-dimethyl-N,N-dinitrourea from the mixed acid-water mixture; 3) hydrolyzing the N,N-dimethyl-N,N-dinitrourea to form methylnitramine by adding the N,N-dimethyl-N,N-dinitrourea-organic solvent solution to water which is at a temperature of from 37 C to 100 C; and 4) isolating the product methylnitramine. Keywords: Patents, Evaporation, Reduction chemistry, Addition reactions. (aw)

Descriptors :   *PATENTS, *PLASTICIZERS, *PROPELLANTS, *NITRAMINES, *SYNTHESIS(CHEMISTRY), METHYL RADICALS, METHYLENES, PENTANES, NITRO RADICALS, METHODOLOGY, UREA, ORGANIC SOLVENTS, HYDROLYSIS, EVAPORATION, REDUCTION(CHEMISTRY), ADDITION REACTIONS

Subject Categories : Organic Chemistry
      Industrial Chemistry and Chemical Processing
      Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE