DIMETHYLDINITROÖXAMIDE

1947 ◽  
Vol 25b (3) ◽  
pp. 295-300 ◽  
Author(s):  
O. C. W. Allenby ◽  
George F. Wright
Keyword(s):  
Nitric Acid ◽  
Sulphuric Acid ◽  
Low Cost ◽  
Optimum Yield ◽  
Requisite Amount ◽  
Waste Acid

A practical low-cost method is described for the preparation of the explosive dimethyldinitroöxamide. Dimethyloxamide is prepared in 94% yield from an oxalic ester and methylamine, and then is nitrated in 98% yield with slightly more than the requisite amount of nitric acid. The nitrating acid can be recovered safely. The optimum yield is obtained when the waste acid has the composition sulphuric acid monohydrate.

scholarly journals PRODUCTION OF CETANE IMPROVER FROM Jathropa curcas OIL

2010 ◽  
Vol 10 (3) ◽  
pp. 396-400 ◽  
Author(s):  
Abdullah Abdullah ◽  
D.R. Wicakso ◽  
A.B. Junaidi ◽  
Badruzsaufari Badruzsaufari
Keyword(s):  
Nitric Acid ◽  
Reaction Time ◽  
Sulphuric Acid ◽  
Jatropha Curcas ◽  
Cetane Number ◽  
Ftir Spectra ◽  
Alkyl Nitrates ◽  
Total N ◽  
Jatropha Curcas Oil ◽  
Magnetic Stirrer

Nitration of biodiesel from Jatropha curcas oil using mixture of HNO3 and H2SO4 had been done in an attempt to obtain a cetane improver or cetane number enhancer. The nitration was carried out by varying the numbers of moles of sulphuric acid, nitric acid, temperature and time. The process was conducted in a round bottom flask reactor that equipped with a magnetic stirrer and a ball cooler on a water batch. The mixture of H2SO4 and HNO3 was placed in the reactor and subsequently added slowly with biodiesel drop by drop. The results showed that increasing the mole numbers of sulphuric acid tends to reduce the yield or volume and total N of nitrated biodiesel. Increasing the number of moles of nitric acid tends to increase the yield, but decrease the value of total N. While increasing of temperature and reaction time tends to reduce the yield and total N. From FTIR spectra product was estimated as a mixture of esters of alkyl nitrates and nitro. From the testing of cetane number it can be predicted that nitrated biodiesel potentially as cetane improver.

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