CN-119838264-B - Custom sequence multi-frequency ultrasonic extraction method

Abstract

The invention discloses a self-defined sequence multi-frequency ultrasonic extraction method which comprises the steps of mixing an object to be extracted with an extraction solvent, putting the mixture into a multi-frequency ultrasonic extraction device, starting the multi-frequency ultrasonic extraction device, extracting according to preset working parameters, and finishing the extraction, wherein the preset working parameters comprise a plurality of ultrasonic frequencies which are sequentially increased, and the number of the ultrasonic frequencies is more than or equal to 3. The multi-frequency ultrasonic extraction method has the advantages of high extraction precision, short time consumption and simple and convenient operation.

Inventors

• HUANG LINA
• LI SHIDONG
• WEI MEI
• LI MEITING

Assignees

• 深圳技术大学

Dates

Publication Date

20260505

Application Date

20250210

Claims (7)

1. 1. The custom sequence multi-frequency ultrasonic extraction method is characterized by comprising the following steps of: mixing an extract to be extracted with an extraction solvent, and placing the mixture into a multi-frequency ultrasonic extraction device, wherein the multi-frequency ultrasonic extraction device comprises a plurality of ultrasonic transducers arranged on the bottom surface of an ultrasonic cylinder body; Starting the multi-frequency ultrasonic extraction device, extracting according to preset working parameters, and finishing the extraction after finishing, wherein the preset working parameters comprise a plurality of ultrasonic frequencies which are sequentially increased, the number of the ultrasonic frequencies is more than or equal to 3, the preset working parameters comprise 3-6 ultrasonic frequencies which are sequentially increased along with the increase of ultrasonic time in ultrasonic frequency bands specified by f1, f2, f3, f4, f5 and f6, and the frequency ranges are more than or equal to 15kHz and less than or equal to 25kHz, 25kHz and less than or equal to f2 and less than or equal to 35kHz, 35kHz and less than or equal to f3 and less than or equal to 45kHz, 55kHz and less than or equal to f4 and less than or equal to 65kHz, 65 and less than or equal to f5 and less than or equal to 85kHz and less than or equal to 6 and less than or equal to 120kHz; The extraction method is used for extracting a forbidden chemical additive which is combined with a high polymer material in a physical adsorption mode to improve the performance of the high polymer material, wherein the forbidden chemical additive comprises one of phthalate plasticizer, polybrominated diphenyl, polychlorinated diphenyl and polycyclic aromatic hydrocarbon, and the high polymer material comprises one of polyvinyl chloride, polypropylene, polyethylene terephthalate and polyurethane.
2. 2. The custom sequential multi-frequency ultrasonic extraction method according to claim 1, wherein the number of the ultrasonic transducers is 4-8, and a parallel triangular array arrangement form can be formed among any 3 ultrasonic transducers.
3. 3. The custom sequential multifrequency ultrasonic extraction method according to claim 1, wherein the piezoelectric material of the ultrasonic transducer is a lead magnesium niobate-lead titanate piezoelectric single crystal material or a lead zirconate titanate piezoelectric ceramic material.
4. 4. The custom sequential multifrequency ultrasonic extraction method according to claim 3, wherein the piezoelectric constant of the piezoelectric material ranges from 300pC/N to 706pC/N; And/or the electromechanical coupling coefficient k 33 of the piezoelectric material is 0.57-0.75.
5. 5. The custom sequence multiple frequency ultrasonic extraction method according to claim 1, wherein the multiple frequency ultrasonic extraction device comprises an ultrasonic cylinder body, the ultrasonic cylinder body is in the shape of a cylinder, and the ultrasonic cylinder body is made of titanium alloy.
6. 6. The custom sequential multi-frequency ultrasonic extraction method according to claim 1, wherein the preset operating parameters comprise sequentially increasing 3-6 ultrasonic frequencies.
7. 7. The custom sequential multi-frequency ultrasonic extraction method according to claim 1, wherein the preset operating parameters include an extraction temperature of 50 ℃ to 65 ℃; and/or the preset working parameters comprise 400-1000 w of ultrasonic power; And/or the preset working parameters comprise extraction time of 20-40 min.

Description

Custom sequence multi-frequency ultrasonic extraction method Technical Field The invention relates to the technical field of ultrasonic extraction, in particular to a custom sequence multi-frequency ultrasonic extraction method. Background The ultrasonic technology plays an important role in the aspects of chemical reaction, biological resource extraction, biological macromolecule degradation, modification and the like. The method mainly generates local high temperature and high pressure through cavitation, strengthens chemical bond fracture, promotes molecular structure change and achieves the aim of extraction. When extracting the effective components, the ultrasonic energy obviously reduces the solvent consumption, shortens the extraction time, reduces the extraction temperature and improves the extraction rate. In chemical and biological reactions, ultrasonic waves can also obviously shorten the reaction time and improve the reaction yield. The effect of multi-frequency ultrasonic wave crest and peak superposition is utilized, so that the ultrasonic treatment effect can be further improved. However, the present ultrasonic wave generators with multiple frequencies work simultaneously and emit ultrasonic waves, the composite spectrum is very complex, and with the extension of the treatment time, peak-to-peak addition and peak-to-peak cancellation with different degrees are generated, so that it is difficult to obtain the multi-frequency ultrasonic extraction treatment method and system with controllable effect. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a custom sequence multi-frequency ultrasonic extraction method, which aims at solving the problem that a multi-frequency ultrasonic extraction treatment method and system with controllable effect are difficult to obtain. In order to achieve the above purpose, the invention provides a self-defined sequence multi-frequency ultrasonic extraction method, which comprises the following steps of mixing an object to be extracted with an extraction solvent, putting the mixture into a multi-frequency ultrasonic extraction device, starting the multi-frequency ultrasonic extraction device, extracting according to preset working parameters, and finishing the extraction, wherein the preset working parameters comprise a plurality of ultrasonic frequencies which are sequentially increased, and the number of the ultrasonic frequencies is more than or equal to 3. In some embodiments, the extraction method is used to extract forbidden chemical additives that improve the properties of the polymeric material by physically adsorbing the forbidden chemical additives to the polymeric material. In some embodiments, the polymeric material comprises one of PVC, PP, PET, PU. In some embodiments, the number of the plurality of ultrasonic transducers is 4-8, and any 3 ultrasonic transducers can form a parallel triangular array arrangement form. In some embodiments, the piezoelectric material of the ultrasonic transducer is a lead magnesium niobate-lead titanate piezoelectric single crystal material or a lead zirconate titanate piezoelectric ceramic material. In some embodiments, the piezoelectric material has a piezoelectric constant in the range of 300pC/N to 706pC/N and/or an electromechanical coupling coefficient k 33 of 0.57 to 0.75. In some embodiments, the multi-frequency ultrasonic extraction device comprises an ultrasonic cylinder in the shape of a cylinder, the material of the ultrasonic cylinder being a titanium alloy. In some embodiments, the preset working parameters include 3-6 ultrasonic frequencies that are sequentially increased. In some embodiments, the preset working parameters include 3-6 ultrasonic frequencies sequentially increasing in an ultrasonic frequency band specified by f1 (15 khz-25 khz), f2 (25 khz-35 khz), f3 (35 khz-45 khz), f4 (55 khz-65 khz), f5 (65 khz-85 khz), and f6 (85 khz-120 khz). In some embodiments, the preset working parameters include an extraction temperature of 50-65 ℃, and/or the preset working parameters include an ultrasonic power of 400-1000 w, and/or the preset working parameters include an extraction time of 20-40 min. The invention has the beneficial effects that: The self-defined sequential multi-frequency ultrasonic extraction method provided by the invention utilizes a plurality of transducers to work in parallel, provides adjustable total power and band frequency, combines the transducers uniformly arranged at the center and around the bottom surface of the cylinder body, realizes high-intensity ultrasonic output, enhances cavitation effect, and ensures uniformity of sound intensity in a cylindrical region with the bottom center as the center of a circle through transducer arrangement simulation optimization, thereby improving uniformity of a sound field, and enabling final extraction precision to be high, time consumption to be short and operation to be simple and convenient. Drawings