CN109187126B - Laboratory prepares the micro device and method of sulfur dioxide - Google Patents

Laboratory prepares the micro device and method of sulfur dioxide Download PDF

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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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sulfur dioxide
sample injector
tripe pipe
tripe
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CN109187126A (en
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李海志
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/28Preparing 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

Laboratory prepares the micro device and method of sulfur dioxide
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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