Preparation method of special composite wax suitable for medium and low temperature production line

Abstract

The invention relates to the technical field of preparation of composite wax, in particular to a preparation method of special composite wax suitable for a medium-low temperature production line, which comprises the following steps: preparing the following materials in percentage by mass: 30-45% of vacuum four-line wax oil, 25-35% of vacuum four-line deoiled wax, 15-25% of propane light dewaxing paste and 5-17% of microcrystalline wax; the raw materials are placed in a blending tank and fully mixed and stirred through a stirrer, and the stirred raw materials are poured into a high-level tank to be settled and dehydrated; pouring the composite wax into a forming machine, and cooling in a cooling-water machine; the cooled composite wax forms solid composite wax for packaging; according to the invention, through mixing of the vacuum four-line wax oil, the vacuum four-line deoiled wax, the propane light dewaxing paste and the microcrystalline wax, it is ensured that an oil film has enough strength, so that the oil film is prevented from being deformed or broken when ammonium nitrate and other inorganic oxidizing agent salts are crystallized.

Description

Technical Field

[0001] The present invention relates to the technical field of composite wax preparation, and in particular to a preparation method of a special composite wax applicable to medium and low temperature production lines. Background Art

[0002] The composite wax is compounded with oil-containing waxes of different distillation ranges and a variety of additives, and is an important component in the production of emulsion explosives, thereby ensuring the stability of physical and chemical properties during storage, ensuring the continuity and stability of the production line, improving the performance of the product, increasing its use safety, and reducing potential safety hazards and accident risks during production.

[0003] When preparing existing emulsion explosives, the emulsion explosives prepared by using ordinary oil and wax as the outer phase materials are mostly in the form of soft grease, which is easy to adhere to the container wall, bringing some inconveniences to use. At the same time, the oil film strength is weak. When inorganic oxidizer salts such as ammonium nitrate crystallize, the oil film is easily deformed or broken, and the water resistance and sensitivity resistance are poor.

[0004] Therefore, in view of the problem of weak oil film strength and the easy deformation or rupture of the oil film when inorganic oxidizer salts such as ammonium nitrate crystallize, a preparation method of a special composite wax applicable to medium and low temperature production lines can be designed. Summary of the Invention

[0005] In order to overcome the problem of weak oil film strength and the easy deformation or rupture of the oil film when inorganic oxidizer salts such as ammonium nitrate crystallize.

[0006] The technical solution of the present invention is: a preparation method of a special composite wax applicable to medium and low temperature production lines, including the following steps:

[0007] S1: Prepare the following materials by mass percentage: 30% - 45% of the reduced four-line wax bottom oil, 25% - 35% of the reduced four-line dewaxed wax, 15% - 25% of the propane light dewaxing paste, and 5% - 17% of the microcrystalline wax;

[0008] S2: Place several raw materials in a blending tank and fully mix and stir them with a stirrer, and then pour them into a high-level tank for sedimentation and dehydration.

[0009] S3: Pour the composite wax into a molding machine and perform a cooling treatment in a chiller;

[0010] S4: The cooled composite wax forms a solid composite wax for packaging.

[0011] Preferably, the kinematic viscosity of the composite wax reaches 7.0 - 10.0 mm 2 / s at 100 °C, and the melting point of the composite wax is 58 - 75 °C.

[0012] Preferably, the oil content of the composite wax is 25% - 30%, and the flash point (open cup) temperature of the composite wax is not lower than 200°C.

[0013] Preferably, the mechanical impurities of the composite wax are lower than 0.05%, and the melting operation temperature of the composite wax is 65 - 85°C.

[0014] Preferably, the stirring temperature is 65 - 90°C, and the stirring time is 8h.

[0015] The beneficial effects of the present invention: By mixing the reduced fourth-line wax bottom oil, reduced fourth-line dewaxed wax, propane light dewaxing paste, and microcrystalline wax, their viscosities, chain lengths, molecular structures, and emulsifiers are matched and coupled to ensure that the continuously connected oil film has sufficient strength, thereby preventing the deformation or rupture of the oil film during the salting out of inorganic oxidizing salts such as ammonium nitrate. The droplets of the oxidant aqueous solution are dispersed finely and evenly, making the oil films of the composite wax combine tightly and fully with each other during the preparation of the emulsified bomb; the composite wax acts as a combustion aid and quickly participates in the reaction during the explosion reaction, which is beneficial to the initiation and transmission of detonation; the composite wax encapsulates the water-soluble oxidant salt, which not only prevents liquid-liquid stratification but also blocks the erosion and leaching effects of external water, so it has good water resistance; at the same time, under the action of the oil content and kinematic viscosity of the composite wax, the sliding contact between its particles is increased, its toughness is increased, and the resistance is reduced, thereby improving its safety performance. Detailed implementation manners

[0016] The present invention will be further described below in conjunction with embodiments.

[0017] Embodiment 1

[0018] Take 41% of the reduced fourth-line wax bottom oil, 30% of the reduced fourth-line dewaxed wax, 19% of the propane light dewaxing paste, and 10% of the microcrystalline wax. Place the materials in a blending tank and stir with a stirrer at a temperature of 65°C for 8h to fully mix and stir the composite wax. After stirring, pour it into a high-level tank for sedimentation and dehydration to obtain the composite wax; pour the composite wax into a molding machine and perform cooling treatment in a chiller; the cooled composite wax forms a solid composite wax for packaging.

[0019] Embodiment 2

[0020] Take 35% of the reduced fourth-line wax bottom oil, 28% of the reduced fourth-line dewaxed wax, 23% of the propane light dewaxing paste, and 15% of the microcrystalline wax. Place the materials in a blending tank and stir with a stirrer at a temperature of 75°C for 8h to fully mix and stir the composite wax. After stirring, pour it into a high-level tank for sedimentation and dehydration to obtain the composite wax; pour the composite wax into a molding machine and perform cooling treatment in a chiller; the cooled composite wax forms a solid composite wax for packaging.

[0021] Embodiment 3

[0022] Mix 30% of the reduced-four-line wax bottom oil, 25% of the reduced-four-line dewaxed wax, 15% of the propane light dewaxing paste, and 5% of the microcrystalline wax. Place the materials in a blending tank and stir with a stirrer at a temperature of 90°C for 8 hours to fully mix and stir the composite wax. After stirring, pour it into a high-level tank for sedimentation and dehydration to obtain the composite wax; pour the composite wax into a molding machine and perform a cooling treatment in a chiller; the cooled composite wax forms a solid composite wax for packaging.

[0023] The method for preparing a special composite wax applicable to medium and low temperature production lines described in Examples 1, 2, and 3 can ensure that the continuously connected oil film has sufficient strength, thereby preventing the oil film from deforming or breaking when inorganic oxidants such as ammonium nitrate salting out. The droplets of the oxidant aqueous solution are dispersed finely and evenly, making the oil films of the composite wax bind tightly and fully with each other during the preparation of emulsified bombs.

[0024] The above has described the embodiments of the present invention in detail, but the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the gist of the present invention.

Claims

1. A preparation method of a special composite wax applicable to medium and low temperature production lines, comprising the following steps: S1: Prepare the following materials by mass percentage: 30% - 45% of the reduced fourth-line wax bottom oil, 25% - 35% of the reduced fourth-line dewaxed wax, 15% - 25% of the propane light dewaxing paste, and 5% - 17% of the microcrystalline wax; S2: Place several raw materials in a blending tank and mix them thoroughly with a stirrer, and then pour them into a high-level tank for sedimentation and dehydration. S3: Pour the composite wax into a molding machine and perform a cooling treatment in a chiller; S4: The cooled composite wax forms a solid composite wax for packaging.

2. The preparation method of the special composite wax applicable to medium and low temperature production lines according to claim 1, characterized in that: The kinematic viscosity of the composite wax reaches 7.0 - 10.0 mm 2 / s at 100 °C, and the melting point of the composite wax is 58 - 75 °C.

3. The preparation method of the special composite wax applicable to medium and low temperature production lines according to claim 1, characterized in that: The oil content of the composite wax is 25% - 30%, and the flash point (open cup) temperature of the composite wax is not lower than 200°C.

4. The preparation method of the special composite wax applicable to medium and low temperature production lines according to claim 1, characterized in that: The mechanical impurities of the composite wax are lower than 0.05%, and the melting operation temperature of the composite wax is 65 - 85°C.

5. The preparation method of the special composite wax applicable to medium and low temperature production lines according to claim 1, characterized in that: The stirring temperature is 65 - 90°C, and the stirring time is 8 hours.