Emulsion-type explosive composition and method for the preparation thereof
AssigneeE. I. Du Pont de Nemours and Company
InventorJames H. Owen, II
Life of this patent
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Abstract
Emulsion-type explosives having improved storage stability are formed by combining an aqueous solution of an inorganic oxidizing salt and an oil in the liquid phase with agitation in the presence of a fatty acid, e.g., oleic or stearic acid, and an ammonium or alkali metal hydroxide, and incorporating dispersed gas bubbles or voids in the resulting water-in-oil emulsion. An emulsifying system including a fatty acid salt is formed in situ. The product contains the fatty acid salt, fatty acid, and hydroxide in a stabilizing equilibrium which permits the product to retain its explosive properties after storage at temperatures as high as 49.degree. C. or more.
Claims23
A method of producing an emulsion-type blasting composition comprising combining an aqueous solution of an inorganic oxidizing salt and a carbonaceous fuel in the liquid phase with agitation in the presence of a fatty acid and ammonium or alkali metal hydroxide, and incorporating dispersed gas bubbles or voids in the resulting water-in-oil emulsion.
An emulsion-type explosive composition comprising:
- (a) a carbonaceous fuel forming a continuous emulsion phase;
- (b) an aqueous solution of an inorganic oxidizing salt forming a discontinuous emulsion phase dispersed within said continuous phase;
- (c) dispersed gas bubbles or voids comprising at least about 5 percent of the volume of said composition;
- (d) an ammonium or alkali metal salt of a fatty acid;
- (e) a fatty acid;
- and
- (f) an ammonium or alkali metal hydroxide in an amount in excess of that which will form by the hydrolysis of said fatty acid salt in water.
An emulsion-type explosive composition comprising:
- (a) a carbonaceous fuel forming a continuous emulsion phase;
- (b) an aqueous solution of an inorganic oxidizing salt forming a discontinuous emulsion phase dispersed within said continuous phase;
- (c) dispersed gas bubbles or voids comprising at least about 5 percent of the volume of said composition;
- (d) an ammonium or alkali metal salt of a fatty acid;
- (e) a fatty acid;
- and
- (f) an ammonium or alkali metal hydroxide;
- said composition being that which is obtained by combining said carbonaceous fuel and said aqueous solution with agitation in the presence of said fatty acid and said hydroxide so as to form said fatty acid salt in situ.
An emulsion-type explosive composition comprising:
- (a) about from 1 to 10 percent by weight of a carbonaceous fuel forming a continuous emulsion phase;
- (c) an aqueous solution of ammonium nitrate, or of ammonium nitrate and an alkali metal nitrate, forming a discontinuous emulsion phase dispersed within said continuous phase, said nitrate(s) constituting about from 50 to 95 percent, and water about from 5 to 25 percent, of the weight of said composition;
- (c) dispersed gas bubbles or voids comprising at least about 5 percent of the volume of said composition;
- (d) an ammonium and/or alkali metal oleate;
- (e) oleic acid;
- and
- (f) an ammonium and/or alkali metal hydroxide.
Dependencies are inferred from the claim text.