Agents, blasting type

Explosive, blasting, type E or Agent blasting, Type E 0332... 

In the manufacture of explosives, sodium nitrate is used mainly in blasting agents. In slurries and emulsions, sodium nitrate improves stabiUty and sensitivity. It also improves the energy balance because sodium nitrate replaces water, so that more fuel can be added to the formulation. Sodium nitrate reduces crystal size of slurries, which in turn increases detonating speed. In dynamites sodium nitrate is used as an energy modifier. Typical content of sodium nitrate is 20—50 wt % in dynamites, 5—30 wt % in slurries, and 5—15 wt % in emulsions. Sodium nitrate is used also in permissible dynamites, a special type of dynamite for coal (qv) mining. 

Slurry explosives, also known as water-gel explosives or dense blasting agents, resulted from the work of M. A. Cook and others in North America and have now found world-wide application particularly for large scale operations. Whilst slurries are made in many forms to suit almost all types of use, they may be divided into two essentially distinct types ... 

With respect to five-membered lactones fused to hexopyranose units, some approaches have been reported so far and the exploitation of their synthetic potential has led to the access of new carbohydrate derivatives. Bicyclic derivatives of this type are key intermediates in the synthesis of the epimer at C-3 of the sugar moiety contained in miharamycins [212, 213]. The latter are antibiotics known to inhibit strongly Pyricularia oryzae, which produces the rice blast disease. These compounds are also considered to be a potential bioterrorism agent (Scheme 42). Hence, the 3,3-spiroepoxide 176 was converted into the 3-C-cyanomethyl derivative 177, the hydrolysis of which led to spontaneous cyclization in the presence of... 

The first-generation slurries were called Dense Blasting Agents, or DBA s, and comprised two types slurries sensitized primarily with coarse Pelletol TNT and slurries sensitized with aluminum. Second-generation slurries, designated the IREGEL 300 series, were introduced in 1969 as a replacement for the DBA s except for DBA-22M, the first and only slurry yet to be completely qualified by the US Military... 

R.B. Clay L.L. Udy, USP 3249476(1966) CA 65, 2059(1966) and its USReissue 26804(1970) CA 72, 123587r(1970) [The crystn point of the AN soln used to prep AN-soln-based slurry type expl compns is lowered without substantial loss of energy in the final slurry and a more detenable blasting agent is provided by substituting a portion of 39—85%... 

H.R.Fee R.W. Lawrence, LTSP 3318740 (1967) CA 67, 55844s (1967) [An aqueous slurry-type blasting agent is provided by a mixt of 12—20% water, 1-118 (preferably 5-14%) sensitizer such as hexamethylenetetramine mononitrate (I), dinitrate or a mixt of the two, 45-65% AN, 5-20% NaNOa and 0.2-5.0 (preferably 0.5—2.0%) guar-gum thickener in cross-linked form. A supplemental sensitizer such as fine Al, Mg AI or C (or hydrocarbon oil) may be used, especially if less than 5% of... 

EX duPont deNemours and Company Water-In-Oil Emulsion Type Blasting Agent... 

Commercial Solvents Corp Ammonium Nitrate-Nitromethane Type Blasting Agent Containing Urea as a Crystallization Inhibitor... 

Tritex 2. Trade name for a powder form blasting agent of the Nitrocarbonitrate (NON) type (AN based) distributed in the USA by Hercules Inc. 

The first-generation slurries were called Dense Blasting Agents, or DBA s, and comprised two types slurries sensitized primarily with coarse Pelletol TNT and slurries sensitized with... 

---