CN212092339U

CN212092339U - Simple device integrating buffering and drying in laboratory reduced pressure distillation

Info

Publication number: CN212092339U
Application number: CN201922244086.3U
Authority: CN
Inventors: 侯海云; 师浩军; 周辛梓; 杨凯; 蔺鑫璐; 牛淑佳; 张静涵
Original assignee: Xian Polytechnic University
Current assignee: Xian Polytechnic University
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-12-08
Anticipated expiration: 2029-12-13

Abstract

The utility model discloses a simple device integrating buffering and drying into a whole in vacuum distillation in a laboratory, which comprises a drying bottle, wherein the lower end of the drying bottle is connected with the upper end of a buffer bottle, and a porous partition plate is arranged between the drying bottle and the buffer bottle; a first connecting port is arranged on one side face of the buffer bottle and connected with a differential pressure gauge through a pipeline, and a second connecting port is arranged on the other side face of the buffer bottle and connected with a vacuum pump through a pipeline; the upper end of the drying bottle is provided with a ground plug which is connected with a distillation system through a T-shaped pipe; the drying bottle is internally provided with a gas absorbent. The utility model has the advantages that: the laboratory reduced pressure distillation device integrates buffering and drying, reduces the volume of the buffering and drying device, has a segmented leakage detection function, improves the vacuum degree of the whole system, and effectively reduces the boiling point of a distilled sample.

Description

Simple device integrating buffering and drying in laboratory reduced pressure distillation

Technical Field

The utility model belongs to the technical field of laboratory vacuum distillation device, concretely relates to collect buffering and dry simple and easy device as an organic whole in laboratory vacuum distillation.

Background

At present, a laboratory decompression buffer device generally adopts a glass bottle with thick wall and high pressure resistance. The buffer bottle can prevent pump oil from being sucked into the receiving bottle reversely to pollute distillation products, in addition, in order to prevent water vapor from damaging the vacuum pump after entering the vacuum pump, a cold trap or a drying bottle is arranged between the pump and the distillation system, usually, the buffer bottle and a plurality of drying bottles respectively filled with gas absorbents such as granular silica gel, anhydrous calcium chloride and the like are jointly used for absorbing the gases in a laboratory, and the buffer and drying combined device has the characteristics of large volume, poor system tightness, complex operation and the like.

SUMMERY OF THE UTILITY MODEL

The utility model provides a simple and easy device as an organic whole is buffered and dry in laboratory reduced pressure distillation to collection, the laboratory buffering that exists among the prior art is with dry allies oneself with the device bulky, the system seal nature is poor, the operation is complicated scheduling problem with.

The utility model adopts the technical proposal that a simple device integrating the functions of buffering and drying in the vacuum distillation of the laboratory comprises a drying bottle, the lower end of the drying bottle is connected with the upper end of a buffer bottle, and a porous clapboard is arranged between the drying bottle and the buffer bottle; a first connecting port is arranged on one side face of the buffer bottle and connected with a differential pressure gauge through a pipeline, and a second connecting port is arranged on the other side face of the buffer bottle and connected with a vacuum pump through a pipeline; the upper end of the drying bottle is provided with a ground plug which is connected with a distillation system through a T-shaped pipe; the drying bottle is filled with gas absorbent.

The utility model discloses a characteristics still lie in:

the T-shaped pipe comprises a first port, a second port and a third port, a through hole is formed in the grinding plug, the third port penetrates through the through hole, the second port is connected with a distillation system through a pipeline, the first port is connected with a first piston valve, and the second port is connected with a second piston valve; and a third piston valve is arranged on a pipeline between the second connecting port and the vacuum pump.

The drying bottle and the buffer bottle are arranged integrally.

The differential pressure meter is a precise digital differential pressure meter.

The T-shaped pipe, the first piston valve, the second piston valve, the grinding plug and the third piston valve are all made of glass with thick wall and pressure resistance.

The utility model has the advantages that: the buffer function of the buffer bottle and the gas absorption function of the drying bottle are combined into a whole, so that the function of the device is diversified, and the volume of the device is reduced; 1 piston valve is designed at the second connecting port of the glass buffer bottle for checking the air tightness of the buffer drying integrated device and the air tightness of the distillation system in sections.

Drawings

Fig. 1 is a schematic structural diagram of a simple device for integrating buffering and drying in laboratory vacuum distillation.

In the figure, 1, a distillation system, 2, a T-shaped pipe, 201, a first port, 202, a second port, 203, a third port, 301, a first piston valve, 302, a second piston valve, 4, a ground plug, 5, a drying bottle, 6, a gas absorbent, 7, a porous partition, 8, a buffer bottle, 901, a first connecting port, 902, a second connecting port, 10, a third piston valve, 11, a differential pressure gauge, 12 and a vacuum pump are arranged.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

The utility model relates to a simple device integrating buffering and drying into a whole in laboratory reduced pressure distillation, as shown in figure 1, comprising a drying bottle 5, wherein the lower end of the drying bottle 5 is connected with the upper end of a buffer bottle 8, a porous partition plate 7 is arranged between the drying bottle 5 and the buffer bottle 8, one side surface of the buffer bottle 8 is provided with a first connecting port 901, the first connecting port 901 is connected with a differential pressure gauge 11 through a pipeline, the other side surface of the buffer bottle 8 is provided with a second connecting port 902, and the second connecting port 902 is connected with a vacuum pump 12 through a pipeline; the upper end of the drying bottle 5 is provided with a ground plug 4; a T-shaped pipe 2 penetrates through a ground plug 4, the T-shaped pipe 2 comprises a first port 201, a second port 202 and a third port 203, a through hole is formed in the ground plug 4, the third port 203 penetrates through the through hole, the second port 202 is connected with a distillation system 1 through a pipeline, the first port 201 is connected with a first piston valve 301, and the second port 202 is connected with a second piston valve 302; a third piston valve 10 is provided in the conduit between the second connection port 902 and the vacuum pump 12.

Wherein, a gas absorbent 6 is arranged in the drying bottle 5; the T-shaped pipe 2, the first piston valve 301, the second piston valve 302 and the third piston valve 10 are all made of glass; the drying bottle 5 and the buffer bottle 8 are arranged integrally; the differential pressure gauge 11 is a precision digital differential pressure gauge.

The utility model relates to a collect buffering and dry simple and easy device as an organic whole in laboratory vacuum distillation, its working process as follows: before carrying out the reduced pressure distillation experiment, check the gas tightness of whole system earlier, the concrete operation is: the grinding plug 4 is opened, the granular gas absorbent 6 is charged into the drying bottle, then a small amount of vacuum ester is applied to the grinding plug 4 to improve sealability, and then the grinding plug 4 is closed, and the condensate water of the distillation system 1 is opened. Before the leak detection operation is started, a capillary tube of a distillation system is closed, a first piston valve 301, a second piston valve 302 and a third piston valve 10 are opened, the whole system is communicated with the atmosphere, the reading of a differential pressure gauge 11 is 0 at the moment, and if the reading is not 0, the whole system is manually reset; then the first piston valve 301 is closed, the vacuum pump 12 is opened for vacuum pumping, the indication number of the differential pressure gauge 11 is observed, after the indication number reaches a certain value and is stable and unchanged, the third piston valve 10 is closed, and then the vacuum pump is closed rapidly. If the indication of the differential pressure gauge 11 is stable at this time, the sealing performance between the distillation system and the buffer drying system is good. If the indication number of the differential pressure gauge 11 is changed at this time, it indicates that there is a gas leakage portion. The leak detection method is that the second piston valve 302 is closed, if the indication number of the differential pressure gauge 11 is stable and unchanged at the moment, the sealing performance of the buffer drying system is good, and the distillation system 1 has air leakage; and (3) checking the distillation system 1, after the problem of gas leakage is solved, checking the whole system by using the leak detection method until no gas leakage exists, and starting reduced pressure distillation operation.

When the reduced pressure distillation is started, after a sample to be distilled is added into the distillation system 1, the condensed water of the distillation system 1 is opened, the first piston valve 301, the second piston valve 302 and the third piston valve 10 are opened, the indication number of the precise digital differential pressure gauge 11 is ensured to be 0, the first piston valve 301 is closed, then the vacuum pump 12 is opened for vacuumizing, after the indication number of the precise digital differential pressure gauge 11 is stabilized, the bubbling speed of the capillary tube is adjusted by controlling the tightness degree of a spiral clamp of the capillary tube of the distillation system 1, the capillary tube is bubbled at a constant speed, and then the temperature of the distillation system 1 is slowly increased to start the reduced pressure distillation.

After the experiment is finished, the heating source of the distillation system 1 is removed firstly, after the whole system is cooled slightly, the screw clamp on the capillary tube of the distillation system 1 is opened slowly, then the first piston valve 301 is opened slowly to release the pressure, after the indication number of the differential pressure gauge 11 is 0, the vacuum pump 12 is closed, and finally the condensed water is closed.

The utility model relates to a collect buffering and dry simple and easy device as an organic whole in laboratory vacuum distillation, its beneficial effect lies in: the laboratory reduced pressure distillation device integrates buffering and drying, reduces the volume of the buffering and drying device, has a segmented leakage detection function, improves the vacuum degree of the whole system, and effectively reduces the boiling point of a distilled sample.

Claims

1. A simple device integrating buffering and drying into a whole in laboratory reduced pressure distillation is characterized by comprising a drying bottle (5), wherein the lower end of the drying bottle (5) is connected with the upper end of a buffer bottle (8), and a porous partition plate (7) is arranged between the drying bottle (5) and the buffer bottle (8);

a first connecting port (901) is arranged on one side face of the buffer bottle (8), the first connecting port (901) is connected with a differential pressure meter (11) through a pipeline, a second connecting port (902) is arranged on the other side face of the buffer bottle (8), and the second connecting port (902) is connected with a vacuum pump (12) through a pipeline; a grinding plug (4) is arranged at the upper end of the drying bottle (5), and a T-shaped pipe (2) is penetrated in the grinding plug (4); the drying bottle (5) is internally provided with a gas absorbent (6).

2. The simple device integrating buffering and drying into a whole in laboratory reduced pressure distillation is characterized in that the T-shaped pipe (2) comprises a first port (201), a second port (202) and a third port (203), a through hole is formed in the ground plug (4), the through hole penetrates through the third port (203), the second port (202) is connected with the distillation system (1) through a pipeline, the first port (201) is connected with a first piston valve (301), and the second port (202) is connected with a second piston valve (302); a third piston valve (10) is arranged on a pipeline between the second connecting port (902) and the vacuum pump (12).

3. The simple device for integrating buffering and drying in laboratory reduced pressure distillation as claimed in claim 1, wherein the drying bottle (5) and the buffering bottle (8) are integrated.

4. The simple device for integrating buffering and drying in laboratory reduced pressure distillation as claimed in claim 1, wherein said differential pressure gauge (11) is a precision digital differential pressure gauge.