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Ultrasonic technologies

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In this section you can take a closer look at the main applications of high-intensity ultrasound in chemical industry, in medicine, etc. If you know a little about ultrasonic technologies, you can study the operating factors of ultrasonic influence here (in Russian)…> >

If your technological problem cannot be solved in a traditional way, the application of ultrasound lets you successfully solve it.

Dissolution. Application of high-intensity ultrasound helps to speed up the dissolution processes, to reduce fraction of undissolved settling. Ultrasonic dissolution mainly proceeds without special solvents. Comparative table of dissolution processes with ultrasound and without it is shown here. For further information you can see here (in Russian)…>.
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Extraction. The application of high-intensity ultrasound allows to speed up the process (in 10-100 times), to increase the output of extractable substance, to provide the extraction, which is not possible in other methods, to realize the extraction at room temperature, to avoid the usage of extraction agent (alcohol, benzene, etc.). Ultrasonic extraction (especially of biologically active substances) is profitable in industry and has no alternatives at home and obtained medicines satisfy the requirements of State pharmacopeia. The main technologies are following:

  • Preparation of herbal medicines (see more (in Russian)…>).
  • Hop extraction in brewing industry.
  • Preparation of vegetable substances extracts in food industry.

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Acoustic drying. The influence of ultrasonic vibrations helps to remove moisture and to accelerate the drying process in many times. A lot of contradictory information on problems connected with practical realization of acoustic (ultrasound) drying recently appeared. The Laboratory staff has great experience in development and creation of equipment for acoustic (ultrasonic) drying; you can find further information in section "Articles"
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Salting and pickling of food (fish, meat, vegetables and mushrooms). Application: ultrasound lets to speed up the process and simultaneously improve the quality (see more (in Russian)...>)
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Emulsification. It is difficult or even impossible to mix some liquids, for example: water and fats, water and essential oils, water and petroleum derivatives. Mixtures of such liquids are called emulsions and they are in a great demand. Immiscibility barrier can be surmounted due to cavitational processes in ultrasonic field and emulsion with 1…5 micromicron particles can be obtained. Emulsions with such particles are stable for a long time and they aren’t divided into layers during several days or even months. For more information on ultrasonic emulsification you can see here…> . Ultrasonic emulsification is often used for:

  • Preparation of aromatic emulsions.
  • Preparation of food emulsions.
  • Milk treatment (for more details see…>)
  • Preparation of technological emulsions.
  • Preparation of fuel-oil emulsions.

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Fine-particle suspensions.The obtaining of fine-particle materials (particles with 1 or less size) is very important, as many properties of material depend on size reduction range. There are many methods of solid size reduction, but they can be broken up to 100 micromicron. Only ultrasonic size reduction lets get 1 micromicron or even less particles .(see more (in Russian) ...>). Typical cases of application are:

  • Preparation of creams and ointments.
  • Production of industrial suspensions.

Impregnation. In producing articles from composite materials (fiberglass, black-reinforced plastic, and basalt fiber) it is always a great problem to impregnate fiber filling material having capillar structure with viscous binder (as a rule epoxy one). Due to high viscosity of binder the process of air and other gasses removing from capillar structure occurs slowly, and gas cannot be completely removed. As a result, material characteristics (especially dielectric) worsen. Local cavitational influence lets effectively remove residual gas and easily fill capillar with binder. Impregnation process greatly accelerates, and gas content in articles diminishes. You can read more details on impregnation technology and equipment here…>.
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Washing and cleaning. Ultrasonic washing helps to clean hard-to-get-to areas of surface. It can be internal cavities, surfaces of intricate profile.The main factors of influence are cavitation and liquid flowing in ultrasonic influence area. The efficiency of ultrasonic cleaning is in many times higher than of traditional one (by brushes, sponges, sheet of water). Ultrasonic cleaning let easily remove fat and oil impurities, leavings of epoxy resin, carbon deposit, oxides, paint coatings ((for more details (in Russian) see…>)) Ultrasonic cleaning is more frequently used for:

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Preplant seed treatment. Ultrasonic seed treatment in nutritious and disinfectant solution before sowing promotes their germinability even in unfavorable conditions and further growth (for more details (in Russian) see…>).
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Welding of thermoplastic materials. The advantage of ultrasonic welding is that welded seam can be formed at lower temperature than melting point of polymer. Ultrasonic influence is inertialless in contrast to thermal one that lets precisely set welding time and mode. Juncture obtained by ultrasonic welding has high strength, tightness, low-temperature resistance. Welded area preserves the polymer elasticity ((see more information…>))

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Gluing. Ultrasonic influence on the gluing area helps to accelerate the gluing process, provide tightness and improve strength of juncture.
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Mechanical dimensional processing of hard and fragile materials. During ultrasonic dimensional processing working tool with high frequency (18-25kHz) strikes on abrasive material grains supplied with water in processing area. In turn abrasive grains strike the processed material and destroy it. In such a way hard and fragile materials such as glass, granite, marble, glaze and ceramic tiles, porcelain, concrete, silicon plates, precious jewels and semi-precious stones can be processed. Obtained hole has form of working tool. Ultrasonic processing can be characterized by the absence of internal stress. There is not any danger of crack initiation. (See more information...>)

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Decrease of tool tip wear-out. Feeding of ultrasonic vibrations on tool tip helps to decrease friction in the cutting area (on some materials for example fiber glass the friction decreases in 8-10 times) and as a result it let decrease tool tip wear-out, improve surface smoothness, and increase feeding.

Insects deterrence. As is well known insects feel vibration (in such a case sense body is their legs) and they try to leave such place. For protection from destructive insects it is necessary to supply low-amplitude ultrasonic vibrations on the surfaces where insects are undesirable.
This method can be used where it is not possible to utilize insecticides (in shops, storehouses, cheese store, vegetable store and others).(see more information..>).
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Fine-dispersed liquid atomization.. While ultrasonic vibrating system working liquid, which gets on radiating surface of working tool, is atomized. The more frequency the finer atomization will be. This method is widely used in throat sprayers, for fuel atomization, liquid drying, etc.
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