CN109187126B - Laboratory prepares the micro device and method of sulfur dioxide - Google Patents
Laboratory prepares the micro device and method of sulfur dioxide Download PDFInfo
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- CN109187126B CN109187126B CN201811037002.2A CN201811037002A CN109187126B CN 109187126 B CN109187126 B CN 109187126B CN 201811037002 A CN201811037002 A CN 201811037002A CN 109187126 B CN109187126 B CN 109187126B
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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Abstract
The present invention provides the micro device and method that a kind of laboratory prepares sulfur dioxide, belongs to laboratory and prepares sulfur dioxide technical field.First sample injector and the second sample injector are used to be connected to one end of reaction unit, and the other end of reaction unit is connected to one end of property experiment device, and the other end of property experiment device is connected to exhaust gas processing device.The method that laboratory prepares sulfur dioxide, the device of sulfur dioxide is prepared using above-mentioned laboratory, include the following steps: that the sodium sulfite, the benzene sulfonic acid and the ethanol water haptoreaction generate sulfur dioxide, the property of the detection of character of use experimental provision and verifying sulfur dioxide, and completely removed sulfur dioxide by the exhaust gas processing device.This preparation method uses above-mentioned preparation facilities, can very easily prepare sulfur dioxide, controls the preparation amount of sulfur dioxide, the property of detection and verifying sulfur dioxide, and be able to carry out vent gas treatment, avoids pollution environment.
Description
Technical field
The present invention relates to laboratories to prepare sulfur dioxide and its property experiment technical field, in particular to a kind of reality
Test micro device and method that room prepares sulfur dioxide.
Background technique
" property of sulfur dioxide " is highly important content in middle school chemistry teaching material.In general, laboratory prepares titanium dioxide
Sulphur is using sodium sulfite and 70% sulfuric acid reaction, but sodium sulfite is solid soluble easily in water, generally at pulverulence, instead
It should be not easy effectively to control and only stop；And the concentrated sulfuric acid has strong corrosive, and it is inconvenient to carry, and sulfur dioxide is toxic, strong and stimulating
Gas is easy pollution air, abnormally dangerous.
Summary of the invention
The purpose of the present invention is to provide the micro devices that a kind of laboratory prepares sulfur dioxide, can easily prepare two
Sulfur oxide controls the preparation amount of sulfur dioxide, the property of detection and verifying sulfur dioxide, and is able to carry out vent gas treatment, keeps away
Exempt to pollute environment.
Another object of the present invention is to provide a kind of methods that laboratory prepares sulfur dioxide, use above-mentioned apparatus, energy
It is enough easily to prepare sulfur dioxide, the property of detection and verifying sulfur dioxide, and it is able to carry out vent gas treatment, avoid pollution ring
Border.
Realization that the present invention adopts the following technical solutions:
A kind of laboratory prepares the micro device of sulfur dioxide, including first for placing sodium sulfite and benzene sulfonic acid into
Sample device, the property experiment device for detecting and verifying sulfur dioxide, is used for the second sample injector for placing ethanol water
The exhaust gas processing device and reaction unit of sulfur dioxide absorption；
First sample injector and the second sample injector are used to be connected to one end of reaction unit, the other end and property of reaction unit
One end of matter experimental provision is connected to, and the other end of property experiment device is connected to exhaust gas processing device.
Further, in preferred embodiments of the present invention, above-mentioned reaction unit includes tee tube, and the first end of tee tube is used
It is connected in the first sample injector, the second end of tee tube with the second sample injector for being connected to, and the third end of tee tube is used for and property
One end of matter experimental provision is connected to.
Further, in preferred embodiments of the present invention, above-mentioned property experiment device includes for being sequentially communicated setting
For placing the first pinkish red big tripe pipe, the second largest tripe pipe for placing liquor potassic permanganate, for sodium sulfide solution to be arranged
The third-largest tripe pipe and the fourth-largest tripe pipe for sodium hydroxide solution to be arranged, one far from the second largest tripe pipe of the first big tripe pipe
End is connected to for the third end with tee tube, and one end far from the third-largest tripe pipe of the fourth-largest tripe pipe is used for and exhaust gas processing device
Connection, is arranged first switch, sets between the third-largest tripe pipe and the fourth-largest tripe pipe between the first sample injector and the first end of tee tube
Second switch is set, third switch is arranged in parallel on the fourth-largest tripe pipe.
Further, in preferred embodiments of the present invention, above-mentioned first sample injector includes the first injection device, the second sample introduction
Device includes the second injection device, and exhaust gas processing device includes third injection device.
A kind of method that laboratory prepares sulfur dioxide uses the above-mentioned device that sulfur dioxide is prepared for laboratory, packet
Include following steps:
Sodium sulfite and benzene sulfonic acid are placed in the first sample injector, ethanol water is placed in the second sample injector, by first into
Sample device and the second sample injector are connected to one end of reaction unit, and property experiment device is connected to the another of reaction unit
The one end at end, the separate reaction unit of property experiment device connects exhaust gas processing device；
Sodium sulfite, benzene sulfonic acid and ethanol water haptoreaction generate sulfur dioxide, and character of use experimental provision is detected and tested
The property of sulfur dioxide is demonstrate,proved, and is completely removed sulfur dioxide by exhaust gas processing device.
Further, in preferred embodiments of the present invention, above-mentioned sodium sulfite first will before being placed in the first sample injector
Tabletting obtains sodium sulfite piece after the sodium sulfite of 2.5mmol is mixed with the starch of 0.1-0.2g.
Further, in preferred embodiments of the present invention, above-mentioned benzene sulfonic acid first will before being placed in the first sample injector
Tabletting obtains benzene sulfonic acid piece after the benzene sulfonic acid of 2.5mmol is mixed with the starch of 0.1-0.2g.
Further, in preferred embodiments of the present invention, above-mentioned ethanol water is the ethyl alcohol that percentage by volume is 75%-85%
Water.
Further, in preferred embodiments of the present invention, above-mentioned reaction unit includes tee tube, and property experiment device includes
First big tripe pipe, the second largest tripe pipe, the third-largest tripe pipe and the fourth-largest tripe pipe；
Method includes: that pinkish red sample is placed in the first big tripe pipe, places potassium permanganate sample, third in the second largest tripe pipe
Vulcanized sodium sample is placed in big tripe pipe, places sodium hydroxide absorbent in the fourth-largest tripe pipe, by the first sample injector and tee tube
The second end of first end connection, the second sample injector and tee tube connects, the third end of tee tube, the first big tripe pipe, the second largest tripe
Pipe, the third-largest tripe pipe, the fourth-largest tripe pipe and exhaust gas processing device are sequentially communicated；
Sodium sulfite, benzene sulfonic acid and ethanol water haptoreaction generate sulfur dioxide, and character of use experimental provision verifies dioxy
Change sulphur property, sulfur dioxide is made successively to pass through magenta, potassium permanganate, vulcanized sodium and sodium hydroxide.
Further, in preferred embodiments of the present invention, above-mentioned magenta, potassium permanganate, vulcanized sodium and sodium hydroxide make
With before, it is each configured to solution, hydroscopic substance is soaked in solution, dry hydroscopic substance；
Before experiment, distilled water is added and soaks pinkish red hydroscopic substance, potassium permanganate hydroscopic substance, vulcanized sodium hydroscopic substance and hydroxide
Sodium hydroscopic substance.
Compared with prior art, the laboratory that presently preferred embodiments of the present invention provides prepares the beneficial of the device of sulfur dioxide
Effect includes:
First sample injector and the second sample injector are used to be connected to one end of reaction unit, property experiment device be used for it is anti-
The other end of device is answered to be connected to, the first sample injector and the second sample injector are connected to after one end of reaction unit, the first sample injector
Ethanol water contact in interior sodium sulfite, benzene sulfonic acid and the second sample injector, thus react to obtain sulfur dioxide, meanwhile,
The detection of character of use experimental provision and the property of verifying sulfur dioxide are kept away using exhaust gas processing device assist absorption sulfur dioxide
Exempt from it and pollute air, furthermore, it is possible to control sodium sulfite and benzene sulfonic acid and ethanol water by the first sample injector and the second sample injector
Exposure, to control the preparation amount of sulfur dioxide.
Laboratory provided by the invention prepare the method for sulfur dioxide beneficial effect include: before preparation, first will be sub-
Sodium sulphate and benzene sulfonic acid are placed in the first sample injector, and ethanol water is placed in the second sample injector, then all parts are connected
Come, do not connected before use, is convenient for storage and transport, then make sodium sulfite, the benzene sulfonic acid in the first sample injector
It is contacted with the ethanol water in the second sample injector, to react to obtain sulfur dioxide.Wherein, due to sodium sulfite, benzene sulfonic acid
It can be dissolved in water with sulfur dioxide, the degree of ionization of benzene sulfonic acid in ethanol is very weak, so, in order to obtain more dioxy
Change sulphur, and avoid sulfur dioxide it is excessive be dissolved in water, so, use ethanol water as solvent, the preparation amount of sulfur dioxide is more,
Preparation is convenient, and by the first sample injector of control and the second sample injector, can control sodium sulfite and benzene sulfonic acid and connect with ethanol water
Touching amount, to control the preparation amount of sulfur dioxide.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings and also belong to protection scope of the present invention.
Fig. 1 is the structural schematic diagram for the device that the laboratory that the embodiment of the present invention 1 provides prepares sulfur dioxide.
Icon: the first sample injector of 110-；The second sample injector of 120-；130- reaction unit；140- exhaust gas processing device；131-
Tee tube；132- property experiment device；1311- first end；1312- second end；1313- third end；The big tripe pipe of 1321- first；
The second largest tripe pipe of 1322-；The third-largest tripe pipe of 1323-；The fourth-largest tripe pipe of 1324-；133- first switch；134- second switch；
135- third switch.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
Embodiment 1
The device and method for preparing sulfur dioxide to the laboratory of the embodiment of the present invention below is specifically described.
Referring to Fig. 1, laboratory prepare the device of sulfur dioxide include the first sample injector 110, it is the second sample injector 120, anti-
Answer device 130, property experiment device 132 and exhaust gas processing device 140.It is placed in first sample injector 110 and the second sample injector 120
The reactant of sulfur dioxide is generated, reaction unit 130 is the reactor for generating sulfur dioxide, and property experiment device 132 is for examining
The property with verifying sulfur dioxide is surveyed, exhaust gas processing device 140 is used for sulfur dioxide absorption.
In the present embodiment, the first sample injector 110 is for placing sodium sulfite and benzene sulfonic acid, and the second sample injector 120 is for putting
Ethanol water is set, exhaust gas processing device is used for auxiliary absorbing sulfur dioxide, and the first sample injector 110 and the second sample injector 120 are
For being connected to one end of reaction unit 130, the other end of reaction unit 130 is connected to one end of property experiment device 132, property
The other end of matter experimental provision 132 is connected to exhaust gas processing device 140.
First sample injector 110 is detachably connected with reaction unit 130, and the second sample injector 120 and reaction unit 130 are detachable
Connection, property experiment device 132 are detachably connected with reaction unit 130, the first sample injector 110 and the connection of the second sample injector 120
The second in sodium sulfite, benzene sulfonic acid and the second sample injector 120 after one end of reaction unit 130, in the first sample injector 110
The contact of alcohol water, thus react to obtain sulfur dioxide, meanwhile, the detection of character of use experimental provision 132 and verifying sulfur dioxide
Property, and by 140 assist absorption sulfur dioxide of exhaust gas processing device, sulfur oxide avoids its from polluting air, moreover, first
Sample injector 110 can be detached from reaction unit 130, and the second sample injector 120 can be detached from reaction unit 130, pass through the first sample injector
110 and second sample injector 120 control sodium sulfite and benzene sulfonic acid and ethanol water exposure, to control titanium dioxide magister of sulfur
Amount.
Optionally, reaction unit 130 includes tee tube, and the first end 1311 of tee tube 131 is used for and the first sample injector 110
Connection, the second end 1312 of tee tube 131 for be connected to the second sample injector 120, the third end 1313 of tee tube 131 for
One end of property experiment device 132 is connected to, and one end of the separate tee tube 131 of property experiment device 132 is used for and vent gas treatment
Device 140 is connected to.
By the setting of tee tube 131, keep the first sample injector 110, the second sample injector 120 and property experiment device 132 equal
Connection, the first sample injector 110 and the second sample injector 120 and property experiment device 132 are detachably connected with tee tube 131, just
In use later storage and cleaning, meanwhile, tee tube 131 is set, the first sample injector 110, the second sample injector 120 and property are convenient for
The connection of matter experimental provision 132 be connected to, be arranged it is more convenient.
Property experiment device 132 includes for being sequentially communicated the first big tripe pipe 1321 for placing magenta of setting, using
In the second largest tripe pipe 1322 of placement liquor potassic permanganate, the third-largest tripe pipe 1323 for sodium sulfide solution to be arranged and for setting
Set the fourth-largest tripe pipe 1324 of sodium hydroxide solution, one end far from the second largest tripe pipe 1322 of the first big tripe pipe 1321 be used for
The third end 1313 of tee tube 131 is connected to, and one end far from the third-largest tripe pipe 1323 of the fourth-largest tripe pipe 1324 is used for and tail gas
Processing unit 140 is connected to, and first switch 133, the third-largest tripe are arranged between the first sample injector 110 and the first end of tee tube 131
Second switch 134 is set between pipe 1323 and the fourth-largest tripe pipe 1324, third switch is arranged in parallel on the fourth-largest tripe pipe 1324
135。
By the setting of four big tripe pipe, the property with verifying sulfur dioxide can detecte, if successfully preparing titanium dioxide
Sulphur, then the magenta in the first big tripe pipe 1321 is faded, and the potassium permanganate in the second largest tripe pipe 1322 fades, the third-largest tripe pipe 1323
Interior to generate flaxen substance, the fourth-largest tripe pipe 1324 is interior without discoloration, and illustrate to generate is sulfur dioxide.
First sample injector 110 includes the first injection device, and the second sample injector 120 includes the second injection device, vent gas treatment
Device 140 includes third injection device.Optionally, the first injection device is the first syringe, and the second injection device is the second note
Emitter, third injection device are third syringe, the first big tripe pipe 1321, the second largest tripe pipe 1322, the third-largest tripe pipe 1323, the
Four big tripe pipes 1324 and tee tube 131 are glass apparatus, to be observed.
First switch 133 is opened, second switch 134 and third switch 135 are closed, pushes the second syringe, pulls first
Syringe enters the ethanol water injection in the second syringe in the first syringe, make sodium sulfite in the first syringe and
Benzene sulfonic acid is contacted with the ethanol water for entering the first syringe, so that so that sodium sulfite and benzene sulfonic acid is reacted generates titanium dioxide
Sulphur, due to the setting of the first syringe and the second syringe, sulfur dioxide can only be from 1313 entering of third end of tee tube 131
In matter experimental provision 132, third syringe is slowly pulled, while pushing the first syringe, make sulfur dioxide to the first big tripe pipe
1321, diffusion in the second largest tripe pipe 1322, the third-largest tripe pipe 1323, the fourth-largest tripe pipe 1324 and third syringe, wait react
After 1min, the piston of third syringe is pushed, pulls the first syringe, pushes or pull on the first syringe and third injection repeatedly
Device can make SO2It is sufficiently reacted, when the first big tripe pipe 1321, the second largest tripe pipe 1322, the third-largest tripe pipe 1323 and the fourth-largest tripe
Second switch 134 and third switch 135 are opened in fully reacting in pipe 1324, repeat the piston for pushing third syringe, pulling the
One syringe can remove sulfur dioxide, avoid pollution air so that remaining sulfur dioxide is sufficiently absorbed by sodium hydroxide.
The method that laboratory prepares sulfur dioxide is operated using the device that above-mentioned laboratory prepares sulfur dioxide.It will
Sodium sulfite and benzene sulfonic acid are placed in the first syringe, and ethanol water is placed in the second syringe, and pinkish red sample is placed in first
In big tripe pipe 1321, potassium permanganate sample is placed in the second largest tripe pipe 1322, vulcanized sodium sample is placed in the third-largest tripe pipe
In 1323, sodium hydroxide absorbent is placed in the fourth-largest tripe pipe 1324, respectively by the of the first syringe insertion tee tube 131
One end 1311, by the second end 1312 of the second syringe insertion tee tube 131, by the third end 1313 of tee tube 131 and first
Big tripe pipe 1321, the second largest tripe pipe 1322, the third-largest tripe pipe 1323, the fourth-largest tripe pipe 1324 and third syringe are sequentially communicated company
It connects.
The second syringe is pushed, the first syringe is pulled, flows into the ethanol water in the second syringe in the first syringe,
First syringe is not inserted into injection needle, enters ethanol water in the first syringe, and sodium sulfite, benzene sulfonic acid and ethanol water contact are anti-
Sulfur dioxide should be generated, third syringe is twitched, third syringe is made constantly to generate suction, sulfur dioxide is drawn, makes dioxy
Potassium permanganate, the third-largest tripe pipe in pinkish red, the second largest tripe pipe 1322 in the first big tripe pipe 1321 can be passed sequentially through by changing sulphur
The sodium hydroxide in vulcanized sodium and the fourth-largest tripe pipe 1324 in 1323, detection with verify sulfur dioxide property and will be remaining
Sulfur dioxide is absorbed, and air is avoided pollution.
In the present embodiment, before sodium sulfite and benzene sulfonic acid are placed in the first syringe, tabletting is carried out to it respectively.?
Before ethanol water is placed in the second syringe, the configuration of ethanol water is first carried out.
Specifically, sodium sulfite is before being placed in the first syringe, and tabletting obtains after first mixing sodium sulfite with starch
Sodium sulfite piece.Tabletting obtains sodium sulfite piece after the sodium sulfite of 2.5mmol is mixed with the starch of 0.1-0.2g.It is optional
Ground after mixing 0.3g sodium sulfite (2.5mmol) with 0.1g starch, is pressed into diameter and is with PC-5 (5 tons) tablet press machine
The sodium sulfite circular piece of 10mm.It adds starch and carries out tabletting, tabletting effect is more preferable, so that sodium sulfite forms laminated structure.
Benzene sulfonic acid is before being placed in the first syringe, and tabletting obtains benzene sulfonic acid piece after first mixing benzene sulfonic acid with starch.It will
Tabletting obtains benzene sulfonic acid piece after the benzene sulfonic acid of 2.5mmol is mixed with the starch of 0.1-0.2g.Optionally, by 0.4g benzene sulfonic acid
After (2.5mmol) is mixed with 0.1g starch, it is round that the benzene sulfonic acid that diameter is 10mm is pressed into using PC-5 (5 tons) tablet press machine
Piece.It adds starch and carries out tabletting, tabletting effect is more preferable, so that benzene sulfonic acid forms laminated structure.
Ethanol water is the ethanol water that percentage by volume is 75%-85%.By the dehydrated alcohol of 75-85ml and 15-25ml
Water is mixed to get ethanol water.
Magenta, potassium permanganate, vulcanized sodium and sodium hydroxide before the use, are each configured to solution, and hydroscopic substance is impregnated
In in solution, dry hydroscopic substance is added distilled water and soaks pinkish red hydroscopic substance, potassium permanganate hydroscopic substance, vulcanized sodium suction before experiment
Water object and sodium hydroxide hydroscopic substance.Optionally, hydroscopic substance can be cotton or sponge etc..
The preparation of the cotton of sodium hydroxide: weighing 6g sodium hydrate solid first, after 30ml water solvent soln is added, is added
Spherical cotton mass 20 that diameter is about 5cm after immersion, are dried, and closed preservation in 70 DEG C of convection ovens.
The preparation of pinkish red cotton: weighing 0.03g magenta powder first, and after 30ml water solvent soln is added, diameter is added
The spherical cotton mass of about 5cm 30 after immersion, is dried, and closed preservation in 70 DEG C of convection ovens.
The preparation of the cotton of potassium permanganate: weighing 0.003g potassium permanganate crystals first, after 40ml water solvent soln is added,
Spherical cotton mass 30 that diameter is about 5cm are added, after immersion, are dried in 70 DEG C of convection ovens, and closed preservation.
The preparation of the cotton of vulcanized sodium: weighing 0.04g vulcanized sodium solid first, after 40ml water solvent soln is added, is added
Spherical cotton mass 30 that diameter is about 5cm after immersion, are dried, and closed preservation in 70 DEG C of convection ovens.
The preparation of sodium sulfite circular piece, benzene sulfonic acid circular piece and dry cotton, easy to carry and placement are direct by tablet
Be placed in the first syringe, before the use, dripped on dry cotton it is several drip, reality can be carried out in putting it into big tripe pipe
Test operation.
Laboratory operating procedures are as follows: the sodium sulfite piece and benzene sulfonic acid piece for being first separately added into n are in (sulfurous in the first syringe
Sour sodium piece is consistent with the molal weight of benzene sulfonic acid piece, and the piece number is consistent, and experimental implementation is more convenient, does not have after experiment reaction residual
It stays, avoids pollution air, and a piece of or multi-disc sodium sulfite piece and benzene sulfonic acid piece can be selected to carry out with experimental demand
Preparation), ethanol water 50ml is being added in the second syringe, to dry state magenta cotton balls, potassium permanganate cotton balls, vulcanized sodium cotton balls and
Be added dropwise respectively on sodium hydroxide cotton balls 2ml water sufficiently infiltrate after, slowly fill in the first big tripe pipe 1321, respectively with glass bar
In two big tripe pipes 1322, the third-largest tripe pipe 1323 and the fourth-largest tripe pipe 1324, by the first syringe, the second syringe, tee tube
131, the first big tripe pipe 1321, the second largest tripe pipe 1322, the third-largest tripe pipe 1323, the fourth-largest tripe pipe 1324 and third syringe are used
Rubber tube connects.
The ethanol water of 5ml 80% is corresponded to according to each benzene sulfonic acid piece, pushes the piston of the second syringe, is pulled
The piston of first syringe enters addition ethanol water in the first syringe, dissolves benzene sulfonic acid piece, and anti-with sodium sulfite
Sulfur dioxide should be prepared.And rapidly a large amount of bubbles to be generated when, slowly pull third syringe piston, while push the first note
The piston of emitter makes gas to the first big tripe pipe 1321, the second largest tripe pipe 1322, the third-largest tripe pipe 1323, the fourth-largest tripe pipe
1324 and the diffusion of third syringe, and the color change of each cotton mass is observed, quantitative reaction is complete within about 8~10 minutes.
Obtain result: pinkish red cotton balls slowly fades, and phenomenon is obvious；Potassium permanganate cotton balls slowly fades, and phenomenon is obvious；Vulcanization
Sodium cotton balls has yellowish color substance to generate, and phenomenon is obvious；Sodium hydroxide cotton balls is unchanged, to detect the property of sulfur dioxide simultaneously
Extra sulfur dioxide is fully absorbed.
Experimental example 1
The ethanol water of various concentration is respectively configured, 1 sodium sulfite piece and 1 benzene sulfonic acid are added in the first syringe
5ml solvent is added in piece inside the second syringe, carries out laboratory and prepares sulfur dioxide, detects the gas flow of generation, tied
Fruit such as table 1:
Table 1 prepares the comparison of sulfur dioxide with different solvents with benzene sulfonic acid and sodium sulfite reaction
| Solvent | Generate the speed of gas | Generate gas time | Generate gas flow |
| Pure water | Slowly → in → slow | 5 minutes | 23ml |
| 50% ethyl alcohol | Slowly → slightly fast → slow | 7 minutes | 41ml |
| 75% ethyl alcohol | Fastly → slow | 8 minutes | 49ml |
| 80% ethyl alcohol | Fastly → slow | 9 minutes | 52ml |
| 85% ethyl alcohol | Fastly → slow | 10 minutes | 48ml |
| Dehydrated alcohol | Slowly → slow → slow | 45 minutes | It ignores |
As it can be seen from table 1 the time for testing generation gas when just starting is very slow when solvent is pure water, this is because generating
Sulfur dioxide it is less be dissolved in water, with the progress of reaction and SO2Dissolution be gradually saturated, generate rate gradually add
Fastly, finally due to the reduction of reaction reagent concentration, reaction rate slows down, and the entire reaction time is 5 minutes, generates gas gross
23ml reduces half compared with theoretical value 56ml, this is because a large amount of sulfur dioxide gas is dissolved in water.With ethyl alcohol
Concentration increase, since the solubility of sulfur dioxide in a solvent is gradually reduced, generate gas rate component accelerate,
Time increases, and gas gross increases.But when solvent is dehydrated alcohol, the essentially insoluble solution of sodium sulfite, the electricity of benzene sulfonic acid
It is very weak from degree, therefore do not react substantially, therefore the ethanol water of final choice 75%-85% does solvent preparation titanium dioxide
Sulphur.
Experimental example 2
In this experimental example, first switch 133 is set between the first syringe and the first end 1311 of tee tube 131,
Second switch 134 is set between the third-largest tripe pipe 1323 and the fourth-largest tripe pipe 1324, is arranged in parallel on the fourth-largest tripe pipe 1324
Third switch 135 adds second as shown in Figure 1, containing sodium sulfite piece and benzene sulfonic acid piece in the first syringe in the second syringe
Alcohol aqueous solvent generates sulfur dioxide for starting, and when experiment, opens first switch 133, closes second switch 134 and third is opened
135 are closed, the piston of the second syringe is pushed, pulls the piston of the first syringe, makes to be added ethanol water into the first injection
In device, benzene sulfonic acid piece is dissolved, and react with sodium sulfite and prepare sulfur dioxide, and when rapid a large amount of bubbles to be generated, slowly drawn
The piston of dynamic third syringe, while the piston of the first syringe is pushed, make gas to the first big tripe pipe 1321, the second largest tripe pipe
1322, the third-largest tripe pipe 1323, the fourth-largest tripe pipe 1324 and the diffusion of third syringe push third injection after reacting 1min
The piston of device pulls the first syringe, pushes or pull on the first syringe and third syringe repeatedly, can make SO2By sufficiently anti-
It answers, when fully reacting in the first big tripe pipe 1321, the second largest tripe pipe 1322, the third-largest tripe pipe 1323 and the fourth-largest tripe pipe 1324,
Second switch 134 and third switch 135 are opened, the piston for pushing third syringe is repeated, pulls the first syringe, so that residual
Sulfur dioxide sufficiently absorbed by sodium hydroxide, sulfur dioxide can be removed, avoid pollution air.
Embodiments described above is a part of the embodiment of the present invention, instead of all the embodiments.Reality of the invention
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
Claims (7)
1. the micro device that a kind of laboratory prepares sulfur dioxide, which is characterized in that including for placing sodium sulfite and benzene sulphur
First sample injector of acid, the second sample injector for placing ethanol water, the property for detecting and verifying sulfur dioxide are real
Experiment device, exhaust gas processing device and reaction unit for sulfur dioxide absorption；
First sample injector and second sample injector are used to be connected to one end of the reaction unit, reaction unit it is another
One end is connected to one end of the property experiment device, and the other end and the exhaust gas processing device of the property experiment device connect
It is logical；
First sample injector includes the first injection device, and second sample injector includes the second injection device, at the tail gas
Managing device includes third injection device；
The property experiment device includes the fourth-largest tripe pipe for sodium hydroxide solution to be arranged, the fourth-largest tripe pipe with it is described
One end far from the reaction unit of reaction unit connection, the fourth-largest tripe pipe is connected to third syringe.
2. the apparatus according to claim 1, which is characterized in that the reaction unit includes tee tube, the tee tube
First end with first sample injector for being connected to, and the second end of the tee tube with second sample injector for being connected to, institute
The third end of tee tube is stated for being connected to one end of the property experiment device.
3. the apparatus of claim 2, which is characterized in that the property experiment device includes for being sequentially communicated setting
For placing the first pinkish red big tripe pipe, the second largest tripe pipe for placing liquor potassic permanganate, molten for vulcanized sodium to be arranged
The third-largest tripe pipe of liquid and the fourth-largest tripe pipe for sodium hydroxide solution to be arranged, the first big tripe pipe far from described
One end of the second largest tripe pipe with the third end of the tee tube for being connected to, the separate the third-largest tripe of the fourth-largest tripe pipe
One end of pipe is arranged between first sample injector and the first end of the tee tube for being connected to the exhaust gas processing device
Second switch, parallel connection on the fourth-largest tripe pipe is arranged in first switch between the third-largest tripe pipe and the fourth-largest tripe pipe
Third is arranged to switch.
4. a kind of method that laboratory prepares sulfur dioxide prepares sulfur dioxide for laboratory using described in claim 1
Device, which comprises the steps of:
Sodium sulfite and benzene sulfonic acid are placed in first sample injector, ethanol water is placed in second sample injector, by
One sample injector and the second sample injector are connected to one end of the reaction unit, the property experiment device are connected to described
The other end of reaction unit, one end far from the reaction unit of the property experiment device connect the vent gas treatment dress
It sets；
Sodium hydroxide solution, the sodium sulfite, the benzene sulfonic acid and ethanol water contact are placed in the fourth-largest tripe pipe
Reaction generates sulfur dioxide, the property of the detection of character of use experimental provision and verifying sulfur dioxide, and passes through the vent gas treatment
Device completely removes sulfur dioxide,
The sodium sulfite is before being placed in first sample injector, first by the shallow lake of the sodium sulfite of 2.5mmol and 0.1-0.2g
Tabletting obtains sodium sulfite piece after powder mixing, and the sodium sulfite is before being placed in first sample injector, first by 2.5mmol's
Tabletting obtains sodium sulfite piece after sodium sulfite is mixed with the starch of 0.1-0.2g.
5. according to the method described in claim 4, it is characterized in that, it is 75%-85%'s that the ethanol water, which is percentage by volume,
Ethanol water.
6. according to the method described in claim 4, it is characterized in that, the reaction unit includes tee tube, the property experiment
Device includes the first big tripe pipe, the second largest tripe pipe, the third-largest tripe pipe and the fourth-largest tripe pipe；
The described method includes: placing pinkish red sample in the described first big tripe pipe, potassium permanganate is placed in the second largest tripe pipe
Sample, the third-largest tripe pipe is interior to place vulcanized sodium sample, sodium hydroxide absorbent is placed in the fourth-largest tripe pipe, by first
Sample injector is connected to the first end of the tee tube, and the second sample injector is connect with the second end of the tee tube, the tee tube
Third end, the first big tripe pipe, the second largest tripe pipe, the third-largest tripe pipe, the fourth-largest tripe pipe and the tail
Flash Gas Compression Skid System is sequentially communicated；
The sodium sulfite, the benzene sulfonic acid and the ethanol water haptoreaction generate sulfur dioxide, character of use experimental provision
Sulfur dioxide property is verified, the sulfur dioxide is made successively to pass through pinkish red, the described potassium permanganate, the vulcanized sodium and described
Sodium hydroxide.
7. according to the method described in claim 6, it is characterized in that, pinkish red, the described potassium permanganate, the vulcanized sodium and institute
It states sodium hydroxide before the use, is each configured to solution, hydroscopic substance is soaked in the solution, the dry hydroscopic substance；
Before experiment, distilled water is added and soaks pinkish red hydroscopic substance, potassium permanganate hydroscopic substance, vulcanized sodium hydroscopic substance and sodium hydroxide suction
Water object.
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| CN205984067U (en) * | 2016-05-17 | 2017-02-22 | 段正 | Experimental device for inspection sulfur dioxide nature |
| CN206075668U (en) * | 2016-08-03 | 2017-04-05 | 林师龙 | A kind of environment-friendly type experimental provision of checking sulfur dioxide property |
| CN206649802U (en) * | 2016-08-30 | 2017-11-17 | 齐恩林 | A kind of all-in-one micro experimental provision for being used to examine sulfur dioxide property |
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