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A Rotary Evaporator for Automatic Vacuum Extraction and Continuous Feed

A rotary evaporator and vacuum technology, applied in vacuum distillation, evaporation, solvent extraction, etc., can solve the problems that the vacuum state cannot be maintained for a long time, the process of repeated operations is cumbersome, human and financial resources are wasted, and the structure is simple and the work is reduced Quantitative, easy-to-handle effects

Active Publication Date: 2021-08-27
HUBEI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are certain defects in the existing rotary evaporator process: after the rotary evaporator is started, it takes a certain amount of time to heat up and depressurize. When the vacuum established in the system meets the requirements, the condensing device is also in a state of high efficiency. Due to the volume limit, the vacuum state in the system cannot be maintained for a long time. When the solvent contained in the receiving bottle reaches a certain volume, it is necessary to open the feed valve to break the vacuum, release the received extract, and replace the receiving bottle with a new one.
Especially when concentrating and separating a large amount of solutions, the process of repeated operations is cumbersome, the workload is large and the efficiency is low, causing unnecessary waste of human and financial resources

Method used

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  • A Rotary Evaporator for Automatic Vacuum Extraction and Continuous Feed

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Experimental program
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Effect test

Embodiment 1

[0039] Such as figure 1 As shown, the rotary evaporator of this embodiment includes a rotary flask 22 , a condenser 21 , a reservoir 12 , an extractor 9 , and a feed valve 1 . Wherein, the rotary flask 22 is used to contain the liquid to be distilled, and it rotates at a constant speed under the drive of the driving device 23; The solvent that drips down; specifically, the reservoir 12 is designed using the principle of siphon automatic flushing, which includes a glass bulb cap 13, a glass cover plate 17, and a first conduit 18 and a second conduit 25. Wherein, a left hole and a right hole are respectively arranged on both sides of the glass spherical crown, and the diameter of the left hole is smaller than that of the right hole. The right port is connected by a first conduit 18 to the outlet 16 of the reservoir.

[0040] The upper part of the first conduit 18 is n-shaped, the highest point of the n-shape is higher than the highest point of the glass spherical cap, and the ...

Embodiment 2

[0046] The rotary evaporator operating steps of embodiment 1 are as follows:

[0047] Pour the extract to be extracted into the extractor 9, the extract to be extracted must be between the first glass partition 5 with holes and the second glass partition 6 with holes, pour an appropriate amount of solvent for extraction, turn on the agitator 10, and pass The speed governor 7 adjusts the speed of the agitator 10, adjusts to a suitable speed, and allows the solvent to fully contact with the extract; turn on the vacuum device (not shown in the figure), the heating device 24, and the driving device 23 in sequence, and open the feed valve 1. Under vacuum conditions, the extract in the extractor 9 is sucked into the feed valve 1 through the feed pipe 2, and then flows into the rotary flask 22 through the conduit for rotary evaporation. Under vacuum and heating conditions, the liquid in the rotary flask 22 is The solvent will evaporate and enter the condenser 21, and the condensed st...

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Abstract

The invention relates to a rotary evaporator for vacuum automatic extraction and continuous feeding. The invention has simple structure, easy operation and strong practicability. The storage device of the invention can not only temporarily store the recovered solvent, but also allow the solvent to flow out automatically when the solvent reaches the rated volume. At the same time, the design of two glass partitions in the extractor can effectively separate the extraction phase from the raffinate phase. The extract in the extractor can be sucked into the spinner flask under vacuum condition. The invention not only improves the problem of unloading the recovery bottle to destroy the vacuum in the device, but also realizes the automation of extraction and feeding. At the same time, when the extraction phase is basically absorbed, the solvent stored in the storage device flows into the extractor, avoiding The two extraction phases before and after are mixed and extracted to improve the extraction efficiency. The invention aims at concentrating the extract, especially when concentrating a large amount of solution, can reduce the workload of experimenters and greatly improve the working efficiency of the rotary evaporator.

Description

technical field [0001] The invention relates to a rotary evaporator, in particular to a rotary evaporator for vacuum automatic extraction and continuous feeding, and belongs to the technical field of chemical equipment. Background technique [0002] The rotary evaporator is a commonly used instrument in the laboratory. It is mainly composed of a feeding device, a heating device, a rotating device, a condensing device, a recovery device and a vacuum device. The rotary evaporator is mainly used for rapid concentration and separation of volatile solvents, especially for the concentration and separation of extracts and the recovery of column chromatographic fractions. Evaporate, the vapor reaches the condensing device to condense and then returns to the receiving bottle. Taking a large amount of concentrated extract in natural product research as an example, the existing rotary evaporator workflow is to manually open the feed valve, and the extract is sucked into the rotary fla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01L3/16
CPCB01D1/00B01D1/222B01D1/30B01D3/10B01D11/00
Inventor 田从魁莫勇于光荣龙久思段添然刘雨李月菲
Owner HUBEI UNIV FOR NATITIES