US3923565A

US3923565A - Sensitized slurry explosive composition

Info

Publication number: US3923565A
Application number: US531070A
Authority: US
Inventors: Hiroshi Sakai; Fumio Takeuchi; Tsutomu Hanake
Original assignee: Nippon Oil and Fats Co Ltd
Current assignee: NOF Corp
Priority date: 1973-12-10
Filing date: 1974-12-09
Publication date: 1975-12-02
Anticipated expiration: 1992-12-02

Abstract

A slurry explosive composition comprising an inorganic oxidizing acid salt, water, a combustible material, a thickner and a sensitizer selected from the group consisting of alkali metal salts of alkyldiphenyl ether disulfonic acid, dimethylalkylbetaines and fatty acid esters of 1-hydroxyethyl-2alkylimidazoline. The slurry explosive composition can be initiated by a detonator and has an improved storage stability.

Description

United States atent [191 Sakai et al.

SENSITIZED SLURRY EXPLOSIVE COMPOSITION Inventors: Hiroshi Sakai; Fumio Takeuchi;

Tsutomu Hanake, all of Aichi. Japan Assignee: Nippon Oils and Fats Company Limited, Tokyo, Japan Filed: Dec. 9, 1974 Appl. No.: 531,070

Foreign Application Priority Data Dec. 10, 1973 Japan 48-138008 Dec. 10, 1973 Japan 48-13800) Dec. 10, 1973 Japan 48-138010 US. Cl. 149/60; 149/61; 149/70;

lnt. Cl. C06B 31/30 Field of Search 149/61, 70, 71, 72, 73,

[ 1 Dec. 2, 1975 [56] References Cited UNITED STATES PATENTS 3,816,191 6/1974 Wilson ct a1 149/44 X Primary Examiner-Stephen J. Lechert. Jr. Attorney, Agent, or FirmStevens, Davis, Miller & Mosher 10 Claims, N0 Drawings SENSITIZED SLURRY EXPLOSIVE COMPOSITION The present invention relates to a slurry explosive composition capable of being initiated by the detonator and having an improved storage stability, which is compounded with a novel sensitizer.

Conventional slurry explosive compositions are composed of -30% by weight of water; a sensitizer of high explosive, such as TNT, trimethylenetrinitramine, etc. or powder of metal, such as aluminum, Mg-Al alloy, ferrosilicon, etc.; an inorganic oxidizing acid salt, such as ammonium nitrate, sodium nitrate, ammonium perchlorate or the like, and a thickener, such as guar gum. However, when a high explosive is used as a sensitizer, there is a danger in the production and in the use of explosive compositions, and the production cost is high. While, when powdery metal, for example, powdery aluminum, is used as a sensitizer, there is a tendency that aluminum reacts with aqueous solutions of ammonium nitrate to decompose the ammonium nitrate, and the resulting explosive composition decomposes during its production and storage.

Moreover, water compounded to the slurry explosive cannot completely dissolve inorganic oxidizing acid salts, for example, ammonium nitrate, at a temperature lower than room temperature, particularly at low temperature. Therefore, the ammonium nitrate is repeatedly crystallized and dissolved due to the temperature change during the storage of the slurry explosive and deposits coarse crystals. Further, the separation of inorganic oxidizing acid salt from sensitizer is accelerated with the lapse of time. As the results, the detonability of the slurry explosive becomes unstable and the low temperature detonability thereof decreases.

In order to obviate these drawbacks of slurry explosives containing high explosive sensitizer or powdery metal sensitizer, various methods for giving sensitivity to a slurry explosive by introducing fine foams into the explosive without adding high explosive sensitizer or powdery metal sensitizer have recently been investigated. For example, in US. Pat. No. 3,582,411, the amount of fine foam to be introduced is controlled by varying the production condition. In US. Pat. No. 3,507,718, the density (g/cc) of slurry explosive is adjusted to 0965-1 .36 by compounding a foam-introducing agent of porous carbonaceous materials, such as beet pulp, alfalfa, wood fiber, etc. Further, in Japanese Patent Laid Open Specification No. 4,895/72, slurry explosive is sensitized by a mechanical stirring method and a chemical method. For example, slurry explosive is sensitized by introducing foams into the explosive by gas generating agents, such as hydrogen peroxide, N,N'-dinitrosopentamethylenetetramine, sodium borohydride, etc., or by foam-retaining agents, such as phenol-formaldehyde, glass microballoon, etc. However, in any of these methods, the slurry explosives are not sensitized to such an extent that the slurry explosives can be initiated by the detonator, and further drawbacks of the ignitabilities at low temperature and in small diameter are not solved at all. Further, methods for preventing the separation and decomposition of sensitizers, such as TNT and like, contained in a slurry explosive due to the lapse of time, and for improving the detonability of the explosive at low temperature have been investigated. For example, in Japanese Patent Application Publication No. 15,800/71, a small amount of surfactants, such as trimethylalkylammonium chloride,

2 etc., is compounded to a slurry explosive containing a high explosive sensitizer, such as TNT or the like, whereby the separation of the sensitizer in the slurry explosive is retarded, and the detonability of the explosive at low temperature is improved.

Further, methods, wherein sensitizers other than powdery metal and high explosive are used for preventing the deterioration of low temperature detonability of slurry explosive and the deterioration of detonability of the explosive due to the lapse of time, have been investigated. For example, in Japanese Patent Application Publication No. 34,957/70, a small amount of alkali metal salt of sulfuric acid ester of aliphatic alcohol is compounded to a slurry explosive, whereby the low temperature detonability of the explosive is improved. In Japanese Patent Laid Open Specification No. 1,345/71, a small amount of hydrophobic emulsifier, such as alkali metal salt of straight chain fatty acid, sorbitan ester, aromatic sulfonic acid, alkyolamide and the like, is mixed into a slurry explosive, whereby the low temperature detonability of the explosive is improved. In Japanese Patent Application Publication No. 9,118/72, simple proteins and conjugated proteins. such as albumin, globulin, glycoprotein and the like. are mixed to a slurry explosive, whereby the consistency and low temperature detonability of the explosive are improved.

The above described surfactants and proteins serve to improve the dispersions of organic fuel sensitizer, inorganic oxidizing acid salt and combustible material and to improve the consistency of slurry explosive. However, the surfactant and protein are still insufficient in the improvement of ignitability of slurry explosive in small diameter and the slurry explosive cannot be initiated by the detonator only.

The present invention aims to solve the above described drawbacks of conventional slurry explosives.

The inventors have made various investigations in order to produce a slurry explosive which can be initiated by the detonator alone without the use of conventional sensitizers and is free from the deterioration of performances due to the lapse of time, and found out that, when alkali metal salt of alkyldiphenyl ether disulfonic acid, dimethylalkylbetaine or fatty acid salt of lhydroxyethyl-2-alkylimidazoline is used as a sensitizer and mixed with an inorganic oxidizing acid salt, such as ammonium nitrate, water, a combustible material and a thickener, the ammonium nitrate is dispersed uniformly in the mixture, formation of coarse crystals of ammonium nitrate is prevented, uniform fine foams are introduced into the mixture, and further the sensitizer co-operates with the thickener to maintain stably the uniform fine foams for a long period of time, whereby a slurry explosive composition capable of being initiated by the detonator only and having a high detonation velocity and further having high performance, which is free from the deterioration of performance due to the lapse of time, can be obtained.

That is, the slurry explosive composition of the present invention comprises an inorganic oxidizing acid salt, water, a combustible material, a thickener and ODS-5.0% by weight, based on the total amount of the explosive composition, of a novel sensitizer selected from the group consisting of alkali metal salts of alkyldiphenyl ether disulfonic acid, dimethylalkylbetaines and fatty acid salts of l-hydroxyethyl-2-alkylimidazoline.

3 The novel sensitizer to be used in the slurry explosive composition of the present invention will be explained in more detail hereinafter.

The alkali metal salts of alkyldiphenyl ether disulfonic acid are compounds having the following general formula:

wherein R represents an alkyl group having 8-24 carbon atoms and M represents an alkali metal, such as sodium, potassium or the like. Among the compounds, sodium dodecyldiphenyl ether disulfonate is preferably used in the present invention.

The dimethylalkylbetaines are compounds having the following general formula:

wherein R represents an alkyl group having 8-24 carbon atoms. Among the compounds, dimethylalkyl(- coconut oil)-betaine is preferably used in the present invention.

The fatty acid salts of l-hydroxyethyl-2- alkylimidazoline are compounds having the following general formula:

wherein R represents an alkyl group having 8-24 atoms and R represents a hydrogen atom or an alkyl group having 1 or 2 carbon atoms. Among the compounds, l-hydroxyethyl-2-alkyl( tallow )-imidazoline acetate, l-hydroxyethyl-2-alkyl(tallow )-imidazoline formate and the like are preferably used in the present invention.

In the present invention, the above described novel sensitizer is used in an amount of ODS-5.0% by weight, preferably 0.l-3.0% by weight, based on the total amount of the explosive composition.

The inorganic oxidizing acid salt to be used in the present invention includes ammonium, alkali metal and alkaline earth metal salts of inorganic oxidizing acids, such as nitric acid, chloric acid, hypochlorous acid, perchloric acid and the like. The inorganic oxidizing acid salt can be used alone or in admixture.

The thickener to be used in the present invention includes natural and synthetic high polymers, such as guar gum, polyacrylamide and the like. The thickener can be used alone or in admixture.

The combustible material to be used in the present invention includes liquid combustible materials, such as ethylene glycol, and light oil and other fuel oils, and solid combustible materials, such as powdery sulfur,

urea, powdery coal and the like. The combustible material can be used alone or in admixture.

The slurry explosive composition of the present invention need not contain conventional sensitizers, such as high explosives, for example, TNT, trimethylenetrinitramine, pentaerithrite tetranitrate, etc.; powdery metals such as powdery alumiumum, powdery Al-Mg alloy, powdery ferrosilicon, etc; and inorganic oxidizing acid salts of nitrogen-containing base, such as monomethylamine nitrate, ethylenediamine nitrate, hydrazinium nitrate, etc. However, these conventional sensitizers may be added to the slurry explosive composition of the present invention in order to improve the explosive strength of the composition.

The slurry explosive composition of the present invention is prepared as follows. An inorganic oxidizing acid salt and, if desired, a water-soluble solid combustible material are dissolved in water at 50-60C under stirring in a mixer equipped with a stirrer. Then, a water-insoluble solid combustible material and, if desired, a water-insoluble liquid combustible material are added to the solution at 50C under stirring. The resulting mixture, while stirring at 50C, added with an alkali metal salt of alkyldiphenyl ether disulfonic acid and then a thickener impregnated in a liquid combustible material to obtain the slurry explosive composition.

The sensitizing mechanism of the novel sensitizer to be used in the slurry explosive composition of the present invention has not yet been clarified, but it is clear that the sensitizer serves to prevent the deposition of coarse crystals of ammonium nitrate in the explosive composition, to introduce uniform fine forms thereinto, and to improve the sensitivity and detonability thereof.

The slurry explosive composition of the present invention has the following performances. That is, slurry explosive compositions which do not contain the novel sensitizer of the present invention cannot be initiated by using a primer even just after the preparation. On the contrary, the slurry explosive composition of the present invention can be initiated by the primer, and can be initiated by the detonator alone in the case when the mixing ratio of the ingredients is properly selected. Further, the detonability of the explosive composition does not substantially decrease even after 3-month storage. Moreover, the explosive composition does not decompose during storage contrary to conventional slurry explosive composition containing aluminum, and is not dangerous due to the absence of high explosive. Therefore, the slurry explosive composition of the present invention can be handled safely and simply and produced inexpensively, and is very useful for industrial purpose.

The following examples are given for the purpose of illustration of this invention and are not intended as limitations thereof.

EXAMPLES l to 5 AND COMPARATIVE EXAMPLE Slurry explosive compositions were prepared according to the compounding recipe as shown in the follow- Table l-continued Comparative Example 1 Example primer at 20C (m/s) Note:

'. Detonation x: N ondetonation EXAMPLES 6 to 10 Slurry explosive compositions were prepared according to the compounding recipe as shown in the following Table 2 in the following manner. Ammonium nitrate and urea were dissolved in water at 50C under stirring in a mixer equipped with a stirrer. Powdery sulfur and dimethylalkyl(coconut oil)-betaine were added to the solution and then guar gum impregnated in ethylene glycol was added thereto under stirring. The stirring was continued for 3-4 minutes to obtain 5 kinds of slurry explosive compositions having different bulk densities and consistencies as shown in Table 2.

The slurry explosive compositions of Examples 6 to containing dimethylalkyl(coconut oil)-betaine had bulk densities of 0.94, 0.81, 0.89. 0.84 and 1.10 just after the preparation, and had a smooth appearance containing uniform fine foams. These explosive compositions charged into iron tubes having a diameter of 35 mm were satisfactorily detonated by the plain detonator or electric detonator alone. In this case, when the explosive compositions were initiated by using 50 g of dynamite, the explosive compositions were detonated at detonation velocities of 3,860, 3,720, 3,740, 4,000 and 3,030 m/s.

It was found from the above obtained results that dimethylalkyl(coconut oil)-betaine is effective for improving the sensitivity and detonability of a slurry explosive composition even when a very small amount. i.e., 0.05% by weight of'dimethylalkyKcoconut oil)- betaine was contained in the explosive composition, and that, when 1-5% by weight of dimethylalkyl(- coconut oil)-betaine was contained in a slurry explosive composition, the explosive composition was sensitized to such an extent that the explosive composition can be initiated by the plain detonator or electric detonator alone. and further the detonation velocity of the explosive composition was improved.

Table 2 Example 6 7 8 9 10 Ingredient (71 by weight) Ammonium nitrate 68.86 50.6 72.5 68.6 68.75

Potassium nitrate 15.0 Urea 4.0 4.0 4.0 4.0 4.0 Powdery sulfur 3.0 3.0 3.0 3.0 3.0 Powdery coal 0.74 l.l 1.8 Ethylene glycol 1.4 1.4 1.4 1.4 1.4 Guar gum 1.0 1.0 1.0 1.0 1.0 Water 20.0 20.0 15.0 20.0 20.0 Dimethylalkyl- (coconut oil)-betaine 1.0 5 0 2.0 2 0 0.05

Performance Just after the preparation Bulk Density 0.94 0.81 0.89 0.84 1.10

Detonation velocity in the initiation by the 2.900 3.300 3.120 2.780 x detonator at 25C (m/s) Detonation velocity 3,530 3.690 3.330 3.850 x in the initiation by the primer 75 4.400 3.400

at 25C (m/s) 1251b After 3-month storage Bulk density 0.96 0.84 0.91 0.88 1.15

Initiation by the detonator at 20C x o o o x Detonation velocity in the initiation by the 3.860 3.720 3.740 4.000 3.030

primer at 20C (m/s) mm were completely detonated by the plain detonator or electric detonator alone at detonation velocities (m/s) as shown in Table 2. In this case, when the explosive compositions were initiated by using g of dynamite as a primer, the explosive compositions were detonated at detonation velocities (m/s) as shown in Table 2. Even after 3-month storage, the appearances of the explosive compositions did not change, coarse crystals of ammonium nitrate did not form, and the bulk densities of the explosive compositions did not substantially increase. After 3-month storage, the explosive compo sitions charged into iron tubes having a diameter of 35 EXAMPLES 11 to 15 Slurry explosive compositions were prepared according to the compounding recipe as shown in the following Table 3 in the following manner. Ammonium ni-.

kinds of slurry explosive compositions having different bulk densities and consistencies as shown in Table 1.

The slurry explosive compositions of Examples 1 to 5 containing sodium dodecyldiphenyl ether disulfonate 6 tion can be initiated by the plain detonator or electric detonator alone, and further the detonation velocity of the explosive composition was improved.

On the contrary, the slurry explosive composition of had bulk densities of 0.90, 0.85, 0.87, 0.80 and 1.12 5 the Comparative Example had a bulk density of 1.27 just after the preparation, and had a smooth appearjust after the preparation, and had not an appearance ance containing uniform fine foams. These explosive containing fine foams. This explosive composition compositions charged into iron tubes having a diameter charged into an iron tube having a diameter of 35 mm of 35 mm were completely detonated by the plain detowas not detonated not only in the initiation by the plain nator or electric detonator alone at detonation veloci- 10 detonator or electric detonator alone, but also in the ties (m/s) as shown in Table 1. In this case, when the initiation by using 50 g of dynamite as a primer. After explosive compositions were initiated by using 50 g of 3-mor1th storage, the appearance of the explosive comdynamite as a primer, the explosive compositions were position did not change, but coarse crystals of ammodetonated at detonation velocities (m/s) as shown in nium nitrate were observed in the interior of the com- Table 1. Even after 3-month storage, the appearances position, and the bulk density of the composition inof the explosive compositions did not change and creased to 1.37. The explosive composition charged coarse crystals of ammonium nitrate did not form. Alinto an iron tube having a diameter of 35 mm was not though the bulk densities of the explosive compositions detonated even when the composition was initiated by increased to 0.92, 0.88, 0.88, 0.85 and 1.15 after 3- using 50 g of dynamite as a primer. month storage, the explosive compositions charged Conventional sensitizers, TNT, powdery aluminum into iron tubes having a diameter of 35 mm were satisand monomethylamine nitrate, were used in place of factorily detonated by the plain detonator or electric sodium dodecyldiphenyl ether disulfonate of the presdetonator alone. In this case, when the explosive coment invention, and slurry explosive compositions conpositions were initiated by using 50 g of dynamite, the taining 5% by weight of the conventional sensitizer explosive compositions were detonated at detonation were prepared in the same recipe as described in Examvelocities of 3,630, 3,860, 4,160, 3,650 and 2,570 m/s. ple 3, and the detonation velocities (m/s) of the explo- It was found from the above obtained results that sosive compositions in the case when explosive composidium dodecyldiphenyl ether disulfonate is effective for tions were initiated at 25C in an iron tube with a diamimproving the sensitivity and detonability ofa slurry exeter of mm by using a plain detonator or an electric plosive composition even when a very small amount, 30 detonator together with g of dynamite as a primer, i.e., 0.05% by weight of sodium dodecyldiphenyl ether were measured. However, it was found that, even when disulfonate was contained in the explosive composia conventional sensitizer, TNT, powdery aluminum or tion, and the explosive composition was detonated at a monomethylamine nitrate, was added to a slurry explodetonation velocity of 2,930 m/s in an iron tube diamesive composition in an amount as high as 5% by weight, ter of 125 mm by the primer initiation. Further, it was 35 the sensitivity of the resulting slurry explosive composifound that, when 15% by weight of sodium dodecyltions was not improved, and the explosive strength of diphenyl ether disulfonate was contained in a slurry exthe compositions at the detonation was merely implosive composition, the explosive composition was proved. sensitized to such an extent that the explosive composi- Table l Compara- Example tive Example 1 2 3 4 5 Ingredient by weight) Ammonium nitrate 68.8 68.7 73.3 50.6 68.6 68.75 Potassium nitrate 15.0 Urea 4.0 4.0 4.0 4.0 4.0 4.0 Powdery sulfur 3.0 3.0 3.0 3.0 3.0 3.0 Powdery coal 1.8 0.9 0.3 1.8 Ethylene glycol 1.4 1.4 1.4 1.4 1.4 1.4 Guar gurn 1.0 1.0 1.0 1.0 1.0 1 0 Water 20.0 20.0 15.0 20.0 20.0 20.0 Sodium dodecyldiphenyl ether disulfonate 1 2 5 2 0.05

Performance Just after the preparation Bulk density 1.27 0.90 0.85 0.87 0.80 1.12 Detonation velocity in the initiation by the x 2,900 3.300 3,120 3,290 x detonator at 25( (m/s) Detonation velocity 35 x 3,540 3,900 3.700 3,590 x in the initiation by the primer x 4,400 at 25C (in/s) 125, x 2,930

After 3-month storage Bulk density 1.37 0.92 0.88 0.88 0.85 1.15 Initiation by the detonator at 20 x o o o o x Detonation velocity in the initiation by the x 3.630 3,860 4,160 3,650 2,570

different bulk densities and consistencies as shown in Table 3.

The slurry explosive compositions of Examples that the explosive composition can be initiated by the plain detonator or electric detonator alone, and further the detonation velocity of the explosive composition 1 1-15 containing l-hydroxyethyl-2-alkyl(tallow)- was improved.

Table 3 Example 1 1 12 13 14 15 Ingredient by weight) Ammonium nitrate 68.9 50.6 73.6 68.6 68.75

Potassium nitrate 15.0 Urea 4.0 4.0 4.0 4.0 4.0 Powdery sulfur 3.0 3.0 3.0 3.0 3.0 Powdery coal 0.7 1.8 Ethylene glycol 1.4 1.4 1.4 1.4 1.4 Guar gum 1.0 1.0 1.0 1.0 1.0 Water 20.0 20.0 15.0 20.0 20.0 1Hydroxyethy1-2- alkyl(tallow)-imidazoline 1 5 2 2 0.05 acetate Performance Just after the preparation Bulk Density 0.92 0.86 0.91 0.86 1.20

Detonation velocity in the initiation by the 2.900 3.300 3.120 2.780 x detonator at C (m/s) Detonation velocity 3,780 3.690 3.870 3.640 x in the initiation by the primer 75 4,400

at 25C (m/s) 1254: 3.300

After 3-month storage Bulk density 0.95 0.90 0.96 0.88 1.25

Initiation by the detonator at 20C x o o o x Detonation velocity in the initiation by the 3,630 3,890 3.920 3.630 3.860

primer at 20C (m/s) imidazoline acetate had bulk densities of 0.92, 0.86, 0.91, 0.86 and 1.20 just after the preparation, and had a smooth appearance containing uniform fine foams. These explosive compositions charged into iron tubes having a diameter of 35 mm were completely detonated by the plain detonator or electric detonator alone at detonation velocities (m/s) as shown in Table 3. In this case, when the explosive compositions were initiated by using 50 g of dynamite as a primer, the explosive compositions were detonated at detonation velocities (m/s) as shown in Table 3. Even after 3-month storage, the appearances of the explosive compositions did not change, and coarse crystals of ammonium nitrate did not form. Althouh the bulk densities of the explosive compositions increased to 0.95, 0.90, 0.96, 0.88 and 1.25 after 3-month storage, the explosive compositions charged into iron tubes having a diameter of 35 mm were satisfactorily detonated by the plain detonator or electric detonator alone. In this case, when the explosive compositions were initiated by using 50 g of dynamite, the explosive compositions were detonated at detonation velocities of 3,630, 3,890, 3,920, 3,630 and 2,860 m/s.

It was found from the above obtained results that lhydroxyethyl-2-alkyl(tallow)-imidazoline acetate is effective for improving the sensitivity and detonability of a slurry explosive composition even when a very small amount, i.e., 0.05% by weight of l-hydroxyethy1-2- alkyl(tallow)-imidazoline acetate was contained in the explosive composition, and the explosive composition was detonated at a detonation velocity of 3,300 m/s in an iron tube diameter of 125 mm by the primer initiation. Further, it was found that, when l-5% by weight of l-hydroxyethyl-2-alkyl(tallow)-imidazoline acetate was contained in a slurry explosive composition, the explosive composition was sensitized to such an extent What is claimed is:

l. A slurry explosive composition comprising an inorwherein R represents an alkyl group having 8-24 carbon atoms and M represents an alkali metal,

2. dimethylalkylbetaines having the following general formula wherein R represents an alkyl group having 8-24 carbon atoms, and 3. fatty acid salts of 1-hydroxyethyl-2-alkylimidazoline having the following general formula 1 1 wherein R represents an alkyl group having 8-24 carbon atoms and R represents a hydrogen atom or an alkyl group having 1 or 2 carbon atoms.

2. The explosive composition according to claim 1, wherein the amount of said sensitizer is ODS-5.0% by weight based on the total amount of the explosive composition.

3. The explosive composition according to claim 1, wherein the amount of said sensitizer is O.l-3.0% by weight based on the total amount of the explosive composition.

4. The explosive composition according to claim 1, wherein said alkali metal salt of alkyldiphenyl ether disulfonic acid is sodium dodecyldiphenyl ether disulfonate.

5. The explosive composition according to claim 1, wherein said dimethylalkylbetaine is dimethylalkyl(- coconut oil)-betaine.

6. The explosive composition according to claim 1, wherein said fatty acid salt of l-hydroxyethyl-Z- 12 alkylimidazoline is l-hydroxyethyl-2-alkyl(tallow)- imidazoline acetate or l-hydroxyethyl-2-alkyl(tallow)- imidazoline formate.

7. The explosive composition according to claim 1, wherein said inorganic oxidizing acid salt includes ammonium, alkali metal and alkaline earth metal salts of nitric acid, chloric acid, hypochlorous acid and perchloric acid and mixtures thereof.

8. The explosive composition according to claim 1, wherein said combustible material comprises a combustible material selected from the group consisting of: ethylene glycol, light oil, fuel oils, powdery sulfur, urea, powdery coal, and mixtures thereof.

9. The explosive composition according to claim 1, wherein said thickener comprises a natural or synthetic high polymers.

10. The explosive composition according to clain 9, wherein said thickener comprises a material selected from the group consisting of guar gum, polyacrylamide and mixtures thereof.

Claims

1. ALKALI METAL SALTS OF ALKYLDIPHENYL ETHER DISULFONIC ACID HAVING THE FOLLOWING GENERAL FORMULA

1. A SLURRY EXPLOSIVE COMPOSITION COMPRISING AN INORGANIC OXIDIZING ACID SALT, WATER, A COMBUSTIBLE MATERIAL SELECTED FROM THE GROUP CONSISTING OF LIQUID OR POWDERED ORGANIC COMBUSTIBLE MATERIALS AND POWDERED INORGANIC COMBUSTIBLE MATERIALS, A THICKENER AND A SENSITIZER SELECTED FROM THE GROUP CONSISTING OF

2. dimethylalkylbetaines having the following general formula

2. DIMETHYLALKYLBETAINES HAVING THE FOLLOWING GENERAL FORMULA

2. The explosive composition according to claim 1, wherein the amount of said sensitizer is 0.05-5.0% by weight based on the total amount of the explosive composition.

3. The explosive composition according to claim 1, wherein the amount of said sensitizer is 0.1-3.0% by weight based on the total amount of the explosive composition.

3. fatty acid salts of 1-hydroxyethyl-2-alkylimidazoline having the following general formula

5. The explosive composition according to claim 1, wherein said dimethylalkylbetaine is dimethylalkyl(coconut oil)-betaine.

6. The explosive composition according to claim 1, wherein said fatty acid salt of 1-hydroxyethyl-2-alkylimidazoline is 1-hydroxyethyl-2-alkyl(tallow)-imidazoline acetate or 1-hydroxyethyl-2-alkyl(tallow)-imidazoline formate.