CN217384833U

CN217384833U - A airtight sampling device for trimethylchlorosilane

Info

Publication number: CN217384833U
Application number: CN202221117160.0U
Authority: CN
Inventors: 张容; 高旭勇; 饶建秋; 兰榆坤
Original assignee: Sichuan Jiabi New Material Technology Co ltd
Current assignee: Sichuan Jiabi New Material Technology Co ltd
Priority date: 2022-05-11
Filing date: 2022-05-11
Publication date: 2022-09-06
Anticipated expiration: 2032-05-11

Abstract

The utility model discloses an airtight sampling device for trimethylchlorosilane belongs to chemistry and chemical industry auxiliary device technical field, include first pipeline (12) that forms airtight route with sample pipeline (A), still include several three-way valve, several needle valve, first container (7), second container (9) to and first sample connection (6), second sample connection (10) etc. adopt the utility model discloses a sampling device can ensure that the trimethylchlorosilane sample is in airtight state all the time in sample and analytic process, has not only protected the sample personnel healthy, and the sample still can not contact with the air when also ensuring the analysis, has guaranteed the true reliability of sample testing result.

Description

A airtight sampling device for trimethylchlorosilane

Technical Field

The utility model relates to a chemistry and chemical industry auxiliary device technical field especially relates to an airtight sampling device for trimethylchlorosilane.

Background

Chlorotrimethylsilane of formula C ₃ H ₉ ClSi, widely used in the synthesis of perfumes and organic drugs. Trimethylchlorosilane is a colorless transparent liquid, has the characteristics of low boiling point, easy volatilization, strong corrosivity, pungent odor of hydrogen chloride and the like, and is easy to hydrolyze in humid air to free hydrochloric acid.

Trimethylchlorosilane is used as a base material for the synthesis of hexamethyldisiloxane, hexamethyldisilazane, and is generally purchased and then used for the production of hexamethyldisiloxane, hexamethyldisilazane. Before feeding, the raw material trimethylchlorosilane is generally sampled to detect the purity, the types and the content of impurities contained in the trimethylchlorosilane, so as to facilitate the control of the process.

Because trimethylchlorosilane has the characteristics of irritation, easy volatilization, easy deliquescence and the like, a general petroleum special closed sampler is generally adopted at present when the trimethylchlorosilane is used for sampling, and the sampler often causes the problems of environmental pollution, blockage of a sampling port due to dampness, harm to the health of sampling personnel and the like in the sampling process. More importantly, even if the operations such as emptying and cleaning are carried out for multiple times before sampling, a sampling bottle cap still needs to be opened during analysis, the sample still contacts with air at the moment, so that the repeatability and the representativeness of the sample cannot be guaranteed, the reliability of data analysis is influenced, and the sample purity measurement result is greatly different from the detection result of a raw material manufacturer, wherein the larger difference is mainly reflected in that the purity marked on a report list of a trimethylchlorosilane sample manufacturer purchased by an applicant is basically more than 99.5%, and the purity measured by the applicant by adopting a universal special petroleum closed sampler is concentrated to 98.0-99.0%.

Disclosure of Invention

An object of the utility model is to provide an airtight sampling device for trimethylchlorosilane to solve above-mentioned problem.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a trimethylchlorosilane sampling device comprises a first pipeline forming a closed passage with a sample pipeline, the first pipeline is respectively provided with a first ball valve and a second ball valve, and also comprises a first container and a connecting pipe, the second ball valve is also communicated with the upper end of the first container through the connecting pipe, a first valve is arranged at an inlet at the upper end of the first container, a first sampling port is arranged at the upper end of the first container, a second container is arranged below the first container, the lower part of the first container is communicated with the second container through a second pipeline, a second valve is arranged on the second pipeline, the lower end of the second pipeline extends into the second container, the upper end of the second container is also provided with a second sampling port, the lower end of the second container is also provided with a third valve, and the first sampling port and the second sampling port are both detachably connected with a sealing cover.

As a preferred technical scheme: the first ball valve and the second ball valve are both three-way valves. Different passages are convenient to adjust and control.

As a preferred technical scheme: the main body of the first container is made of stainless steel, and the upper end of the first container is transparent. The transparent top is convenient for observing the liquid level condition in the container.

As a preferred technical scheme: the first valve, the second valve and the third valve are needle valves. The control is simple and convenient, and the price is low.

As a preferred technical scheme: the second container is a transparent separating funnel made of FEP.

As a preferred technical scheme: the sealing cover is made of polytetrafluoroethylene. The bottle cap is similar to a bottle cap of an ampere-doubling bottle, so that a trace sample injection needle can be conveniently inserted and taken out during analysis, and the whole system is ensured to be in a sealed state;

the sealing cover is further preferably a replaceable detachable connection.

As a preferred technical scheme: the upper end of the first container is provided with an exhaust pipe, the tail end of the exhaust pipe, which is far away from the first container, is immersed in an alkaline solution for absorbing trimethylchlorosilane tail gas, so that the environment is not polluted, and the health of sampling operators is not influenced.

As a preferred technical scheme: the connecting pipe is a polytetrafluoroethylene hose, the polytetrafluoroethylene hose has the characteristics of strong corrosion resistance and resistance to various organic solvents, and the hose has good flexibility and is convenient for connection among the samplers.

Compared with the prior art, the utility model has the advantages of: adopt the utility model discloses a sampling device can ensure that the trimethylchlorosilane sample is in airtight state all the time in sample and analytic process, has not only protected the sampling personnel healthy, and the sample still does not contact with the air when also guaranteeing the analysis, has guaranteed sample testing result's true reliability, and the purity of actual survey after the sample is less than 0.1% with outsourcing producer mark purity error.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

in the figure: 1. a first ball valve; 1-1, connecting a nitrogen end; 2. a second ball valve; 3. A connecting pipe; 4. a first valve; 5. an exhaust pipe; 6. a first sampling port; 7. a first container; 7-1, a first container connecting pipe; 8. a second valve; 9. a second container; 10. a second sampling port; 11. a third valve; 12. a first pipeline; 13. a sealing cover; 14. a support frame; 15. a handle; A. a sample conduit.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Example 1

Referring to fig. 1, a closed sampling device for trimethylchlorosilane comprises a first pipeline 12 forming a closed passage with a sample pipeline a, a first ball valve 1 and a second ball valve 2 are respectively arranged on the first pipeline 12, a first container 7 and a connecting pipe 3 are further included, the second ball valve 2 is further communicated with the upper end of the first container 7 through the connecting pipe 3, a first valve 4 is further arranged at an inlet at the upper end of the first container 7, a first sampling port 6 is arranged at the upper end of the first container 7, a second container 9 is further arranged below the first container 7, the lower end of the first container 7 is communicated with the second container 9 through a second pipeline 13, a second valve 8 is arranged on the second pipeline 13, the lower end of the second pipeline 13 extends into the second container 9, a second sampling port 10 is further arranged at the upper end of the second container 9, a third valve 11 is further arranged at the lower end of the second container 9, and the first sampling port 6 and the second sampling port 10 are both detachably connected with a sealing cover 13 made of polytetrafluoroethylene;

in this embodiment, the first ball valve 1 and the second ball valve 2 are three-way valves, wherein the first ball valve 1 can be respectively communicated with two ends of the first pipeline 12 and the nitrogen connection end 1-1, and the second ball valve can be respectively communicated with two ends of the first pipeline 12 and the connection pipe 3; the first valve 4, the second valve 8 and the third valve 11 are needle valves;

in this embodiment: the main body of the first container 7 is made of stainless steel, and the upper end of the first container is transparent;

the second container 9 is a transparent separating funnel made of FEP;

in this embodiment: an exhaust pipe 6 is arranged at the upper end of the first container 7, and the tail end of the exhaust pipe 6 far away from the first container 7 is immersed in the alkaline solution;

in this embodiment: the connecting pipe 3 is a polytetrafluoroethylene hose; the first container 7 is provided with a first container connecting pipe 7-1, the first valve 4 is arranged on the first container connecting pipe 7-1, the upper end of the first container connecting pipe 7-1 is connected with the connecting pipe 3, and the lower end is inserted into the first container;

as known to those skilled in the art, the present embodiment employs the prior art to seal all the joints, such as rubber plugs.

In addition, in the embodiment, a support frame 14 and a handle 15 are further arranged, the support frame 14 is mainly used for supporting and fixing the sampler, and the handle 15 is used for facilitating transportation during sampling;

during sampling, the first ball valve 1 and the second ball valve 2 are firstly opened to be in the same passage with the sample pipeline A, so that a sample to be sampled in the sample pipeline A enters the first pipeline 12 and is always in a flowing state, then the second valve 8 and the third valve 11 of the sampling device are closed, the second ball valve 2 is rotated, so that trimethylchlorosilane in the first pipeline 12 firstly enters the first container 7 through the first valve 4, when the liquid level reaches 1/2 volume of the first container 7, the first ball valve 1 is rotated, one end connected with the sample pipeline A is closed, the second ball valve 2 is kept still, nitrogen is connected with the nitrogen connecting end 1-1 of the first ball valve 1, all the residual samples in the pipeline are blown into the first container 7, and the continuously-blown nitrogen can ensure that no sample is in the pipeline when the connecting pipe 3 is disassembled to protect personnel safety, it is also ensured that no air in the line enters the first container 7. Blowing the trimethylchlorosilane sample in the first pipeline 12 into the first container 7, stopping introducing nitrogen, closing the first valve 4, and taking down the connecting pipe 3;

when analyzing and detecting the original sample, namely trimethylchlorosilane, a 10 mu l sample injection needle is used for sucking a sample from the first sampling port 6 for analysis;

when analyzing and detecting the content of the hydrolyzed sample, the second valve 8 is opened, the sample flows into a second container 9 (a transparent separating funnel in the embodiment) filled with about 300ml of water in advance for hydrolysis, and the upper organic layer is sampled and detected from a second sampling port 10;

during the treatment of the remaining highly corrosive trimethylchlorosilane in the first container 7, the remaining highly corrosive trimethylchlorosilane can be put into the second container 9 to be hydrolyzed into non-corrosive hexamethyldisiloxane for recycling, and the remaining trimethylchlorosilane sample can be also put into the second container 9 to be hydrolyzed, so that the tightness of the whole sampling and detecting process is ensured.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A closed sampling device for trimethylchlorosilane is characterized in that: the sampling device comprises a first pipeline (12) forming a closed passage with a sample pipeline (A), a first ball valve (1) and a second ball valve (2) are respectively arranged on the first pipeline (12), a first container (7) and a connecting pipe (3) are further included, the second ball valve (2) is further communicated with the upper end of the first container (7) through the connecting pipe (3), a first valve (4) is further arranged at an inlet at the upper end of the first container (7), a first sampling port (6) is arranged at the upper end of the first container (7), a second container (9) is further arranged below the first container (7), the lower end of the first container (7) is communicated with the second container (9) through a second pipeline, a second valve (8) is arranged on the second pipeline, the lower end of the second pipeline extends into the second container (9), and a second sampling port (10) is further arranged at the upper end of the second container (9), the lower end of the second container (9) is also provided with a third valve (11), and the first sampling port (6) and the second sampling port (10) are both provided with a sealing cover (13).

2. A closed sampling device for trimethylchlorosilane according to claim 1, characterized in that: the first ball valve (1) and the second ball valve (2) are both three-way valves.

3. A closed sampling device for trimethylchlorosilane according to claim 1, comprising: the main body of the first container (7) is made of stainless steel, and the upper end of the first container is transparent.

4. A closed sampling device for trimethylchlorosilane according to claim 1, characterized in that: the first valve (4), the second valve (8) and the third valve (11) are needle valves.

5. A closed sampling device for trimethylchlorosilane according to claim 1, characterized in that: the second container (9) is a transparent separating funnel made of FEP.

6. A closed sampling device for trimethylchlorosilane according to claim 1, characterized in that: the sealing cover (13) is made of polytetrafluoroethylene.

7. A closed sampling device for trimethylchlorosilane according to claim 1, characterized in that: an exhaust pipe (5) is arranged at the upper end of the first container (7), and the tail end of the exhaust pipe (5) far away from the first container (7) is immersed in the alkaline solution.

8. A closed sampling device for trimethylchlorosilane according to claim 1, characterized in that: the connecting pipe (3) is a polytetrafluoroethylene hose.