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Ultrasonic field and rectangular pulsed electric field parallel coupling extraction method and device

A rectangular pulse, parallel coupling technology, applied in separation methods, chemical instruments and methods, solvent extraction, etc., can solve the problems of remarkable parallel coupling effect, insufficient ultrasonic-electrostatic field orthogonal coupling, cavitation bubble collapse, etc. Extraction time, improving extraction yield, and the effect of low extraction temperature

Active Publication Date: 2019-01-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The combination of ultrasonic field and high-voltage pulsed electric field will not deform the cavitation bubbles, but will only cause some cavitation bubbles to collapse prematurely. Moreover, the pulsed electric field belongs to alternating current, so the shell cannot be grounded, and there is a risk of electric shock
[0004] The existing patent No. "200910214229.4" discloses a device for extracting effective plant components by ultrasonic and electrostatic fields, but the device disclosed in this patent uses orthogonal coupling, so it cannot fully reflect the advantages of ultrasonic and electrostatic field extraction. According to foreign Scholars have conducted studies on the influence of DC electric fields on the amplitude of ultrasonic signals, showing that: ultrasonic-electrostatic field orthogonal coupling is not as effective as parallel coupling

Method used

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Effect test

Embodiment 1

[0032] The extraction by the parallel coupling extraction device of the ultrasonic field and the rectangular pulsed electric field is carried out as follows: the day lily is dried, crushed, and passed through a 60-mesh sieve for pretreatment. Weigh 2 g of daylily coarse powder, put it into a large flat-bottomed test tube, add 50 mL of 70% ethanol solution, fix the central electrode in the center of the large flat-bottomed test tube with a rubber stopper, and fix the large flat-bottomed test tube on the hexagonal cylinder with an iron stand In the center of the extraction tank, the constant temperature water temperature is 55°C, the ultrasonic frequency is 20kHz, and the ultrasonic power density is 3.5W / cm 2 , Rectangular pulsed electric field voltage ±7kV duty cycle 50%, ultrasonic field and rectangular pulsed electric field parallel coupling treatment for 30min, shutdown, filtrate sampling analysis, day lily flavonoids extraction rate was 1.62%.

Embodiment 2

[0034]Dry the daylily, crush it, and pass through a 60-mesh sieve for pretreatment. Weigh 2 g of daylily coarse powder, put it into a large flat-bottomed test tube, add 50 mL of 60% ethanol solution, fix the central electrode in the center of the large flat-bottomed test tube with a rubber stopper, and fix the large flat-bottomed test tube on the hexagonal cylinder with an iron stand In the center of the extraction tank, the constant temperature water temperature is 35°C, the ultrasonic frequency is 40kHz, and the power density is 5W / cm 2 , Rectangular pulse electric field voltage ±15kV, duty cycle 10%, ultrasonic field and rectangular pulse electric field parallel coupling treatment for 20min, shutdown, filtrate sampling analysis, day lily flavonoids extraction rate 1.48%.

Embodiment 3

[0036] Dry the daylily, crush it, and pass through a 60-mesh sieve for pretreatment. Weigh 2 g of daylily coarse powder, put it into a large flat-bottomed test tube, add 50 mL of 60% ethanol solution, fix the central electrode in the center of the large flat-bottomed test tube with a rubber stopper, and fix the large flat-bottomed test tube on the hexagonal cylinder with an iron stand In the center of the extraction tank, the constant temperature water temperature is 75°C, the ultrasonic frequency is 20kHz, and the power density is 1W / cm 2 , Rectangular pulsed electric field voltage ±20kV duty cycle 90%, ultrasonic field and rectangular pulsed electric field parallel coupling treatment for 50min, shut down, filtrate sampling analysis, day lily flavonoids extraction rate was 1.38%.

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Abstract

The invention discloses an ultrasonic field and rectangular pulsed electric field parallel-coupling and extracting method and device. According to the method, parallel coupling between an ultrasonic field and a rectangular pulsed electric field is adopted for extracting effective components of natural products. The device comprises an ultrasonic extracting groove, a rectangular pulsed electric field generator, a central electrode and a constant-temperature water device. The extracting groove is a hexagonal column body groove. An ultrasonic energy converter is installed on each side face. A flat-base boiling tube is adopted as an extracting container, and extracted materials and solvent are contained in the extracting container. The central electrode is sleeved with a silica gel insulating sleeve and fixed to the center of the flat-base boiling tube through a rubber plug, and then the flat-base boiling tube is fixed to the center in the extracting groove through an iron stand table. A voltage output electrode of a rectangular pulse electric field generator is electrically connected with the central electrode. The grounding end of the rectangular pulse electric field generator is electrically connected with the side wall of the extracting groove. The constant-temperature water tank and the extracting groove are connected to form circulation. By means of the method and the device, polarity components and non-polarity components can be extracted, the extracting yield is high, the extracting time is short, and the extracting temperature is low.

Description

technical field [0001] The invention relates to the technical field of extracting effective components of natural products, in particular to a parallel coupling extraction method and device of an ultrasonic field and a rectangular pulsed electric field. Background technique [0002] The traditional methods for extracting effective components of natural products mainly include: water decoction, solvent extraction, and steam distillation, etc., which have the advantages of simple process and easy operation, but there are disadvantages such as long extraction time, low extraction yield, and high energy consumption. question. When ultrasound propagates in the medium, it will produce a series of effects such as mechanical, thermal and cavitation, which can destroy the cell wall tissue of natural products, increase the penetration of cells, and promote the target substance to flow out of the cell quickly and fully. It plays an important role in the extraction process of natural pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D11/02B01J19/10B01J19/08
CPCB01D11/0211B01D11/0265
Inventor 杨日福范晓丹陆海勤耿琳琳
Owner SOUTH CHINA UNIV OF TECH
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