CN107684825A - A kind of preparation method of purification of nitrogen oxides agent - Google Patents

A kind of preparation method of purification of nitrogen oxides agent Download PDF

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Publication number
CN107684825A
CN107684825A CN201711105962.3A CN201711105962A CN107684825A CN 107684825 A CN107684825 A CN 107684825A CN 201711105962 A CN201711105962 A CN 201711105962A CN 107684825 A CN107684825 A CN 107684825A
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parts
pyridiniujm
purification
aluminum oxide
nitrogen oxides
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魏亮
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Ningbo Hi Tech Zone Xia Yuan Technology Co Ltd
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Ningbo Hi Tech Zone Xia Yuan Technology Co Ltd
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Priority to CN201711105962.3A priority Critical patent/CN107684825A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B01D53/8628—Processes characterised by a specific catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/104—Alumina
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/106—Silica or silicates

Abstract

The present invention proposes a kind of preparation method of purification of nitrogen oxides agent, and intermediate product is made by the component of following parts by weight first：Pyridiniujm [C8H10NO]+Cl‑10 parts, silica gel mSiO2·nH2O or 15 30 parts of aluminum oxide, 4.0 parts of KOH2.5 or K2CO37.5 8.5 parts, 45 150 parts of chloroform, then by the intermediate product being prepared and ion-exchanger NaBH4Or NaHSO3Or CF3SO3Na solution carries out ion exchange and is prepared, the pyridiniujm [C8H10NO]+Cl‑It is prepared by the quantitative response of the materials such as epoxychloropropane and pyridine.Stronger physical absorption function and pyridiniujm [C of the purification of nitrogen oxides agent produced by the present invention with silica gel or aluminum oxide8H10NO]+[BH4]‑Or [C8H10NO]+[HSO3]‑Or [C8H10NO]+[CF3SO3]‑Chemical catalysis purification function, not using expensive noble metal catalyst, it is cheap to prepare cost, prepares simple, and silica gel or aluminum oxide and pyridiniujm [C8H10NO]+[BH4]‑Or [C8H10NO]+[HSO3]‑Or [C8H10NO]+[CF3SO3]‑By chemical key connection, be advantageous to the scattered of particulate, specific surface area is big, and detergent power is strong.

Description

A kind of preparation method of purification of nitrogen oxides agent
The application is divisional application, original bill Patent No.：201610268042.2 the applying date is on April 22nd, 2016, hair It is bright entitled：A kind of preparation method of purification of nitrogen oxides agent.
Technical field
The invention belongs to pollutant purification field, and in particular to a kind of preparation method of purification of nitrogen oxides agent.
Background technology
In recent years, with the continuous social and economic development, people's living condition constantly improves, and the quantity of motor vehicles is more next More, motor vehicles are brought conveniently to our traffic trip, but atmosphere pollution caused by the discharge of motor-vehicle tail-gas The health of human body is had a strong impact on.
One of major pollutants of motor-vehicle tail-gas are nitrogen oxides, and nitrogen oxides has certain danger to people and animals and plants Evil, it can stimulate the organs such as eye, nose, larynx and the lung of people, cause respiratory disease.On the other hand, nitrogen oxides can also be led Cause the environmental problems such as photochemical fog, acid rain, greenhouse effects and ozone hole.
At present, to purify air, the main method for administering nitrogen oxides pollution has：Liquid absorption method, solid absorption method, life Thing facture and catalytic reduction method.
Liquid absorption method technique is simple, small investment, and shortcoming is that clean-up effect is poor, serious to equipment corrosion and inevitable Meeting cause secondary pollution.
Solid absorption method is strong to the adsorption capacity of nitrogen oxides, although before with good economic benefit and commercial Application Scape, but prevent it from obtaining the shortcomings of adsorbent adsorbance is small, occupation area of equipment is big, adsorbent reactivation is difficult, short life It is widely applied.
Biological treatment cost is low, but can cause secondary pollution, and treating capacity is small.
NO in catalytic reduction methodxIt is reduced directly to N2, secondary pollution is not produced, but its used catalyst is often The noble metals such as platinum, palladium, rhodium, it is costly, and the temperature that preparation process needs are higher, energy consumption are big.
Therefore, to overcome present in above method the defects of, propose a kind of preparation method of purification of nitrogen oxides agent.
The content of the invention
Efficiently and the preparation method of simple purification of nitrogen oxides agent is prepared it is an object of the invention to provide a kind of.
The present invention uses following technical scheme：A kind of preparation method of purification of nitrogen oxides agent, by the group of following parts by weight Divide and be made：Pyridiniujm [C8H10NO]+Cl-10 parts, silica gel mSiO2·nH2O or aluminum oxide 15-30 parts, KOH2.5-4.0 parts or K2CO37.5-8.5 parts, chloroform 45-150 parts, the pyridiniujm [C8H10NO]+Cl-By the amount of the materials such as epoxychloropropane and pyridine Reaction is prepared；Comprise the following steps：
1) pyridiniujm [C8H10NO]+Cl-Preparation：A certain amount of epoxychloropropane is weighed in two mouthfuls of flasks, in ice-water bath Middle mechanic whirl-nett reaction 0.5h, the then amount of material such as addition and epoxychloropropane pyridine, in being added in 1h, continue in frozen water 0.5h is reacted in bath, removes ice-water bath afterwards, in 25 DEG C of stirring reaction 4-8h at room temperature, after reaction terminates, is evaporated under reduced pressure immediately, Cool down rapidly, filter in ice-water bath, product dries 12-24 hours after being washed with acetone at 60 DEG C of vacuum；
2) silica gel or aluminum oxide activating：By silica gel mSiO2·nH2O or aluminum oxide are ground with mortar, are 0.30mm with aperture Sieved with 0.63mm sieves, take diameter to be placed in 0.3-0.63mm particles in crucible, 3-4 hours are calcined at 500 DEG C, are put It is standby to enter drier；
3) preparation of pyridiniujm modified silica-gel or aluminum oxide：By 10 parts of pyridiniujm [C obtained by step 1)8H10NO]+Cl-Add Obtained to 15-30 part steps 2) are suspended with 45-150 part chloroforms of gained activation products silica gel or alumina nanoparticles, so The KOH or 7.5-8.5 of 2.5-4.0 parts K are separately added into afterwards2CO3Under the atmosphere of nitrogen, the return stirring 24h at 60-90 DEG C, Products therefrom is centrifuged, after isolated solid is cleaned repeatedly with chloroform, then is washed to neutrality with absolute ethyl alcohol, put Put and dry 10-20 hours in vacuum drying chamber at a temperature of 60-80 DEG C；
4) preparation of purification of nitrogen oxides agent：Pyridiniujm modified silica-gel or alumina dispersion that step 3) is prepared are existed Mechanical agitation 4-6 hours in ion-exchanger, ion exchange is carried out, is then filtered, dried in a vacuum at a temperature of 60-80 DEG C 10-20 hours.
As a further improvement on the present invention, it is made by the component of following parts by weight：Pyridiniujm [C8H10NO]+Cl-10 parts, Silica gel mSiO2·nH220 parts of 20 parts of O or aluminum oxide, 3 parts of KOH or K2CO38 parts, 90 parts of chloroform.
As a further improvement on the present invention, it is made by the component of following parts by weight：Pyridiniujm [C8H10NO]+Cl-10 parts, Silica gel mSiO2·nH215 parts of O or aluminum oxide, K2CO32.5 parts or K2CO37.5th, 45 parts of chloroform.
As a further improvement on the present invention, it is made by the component of following parts by weight：Pyridiniujm [C8H10NO]+Cl-10 parts, Silica gel mSiO2·nH230 parts of O or aluminum oxide, K2CO34 parts or K2CO38.5 parts, 150 parts of chloroform.
As a further improvement on the present invention, above-mentioned steps 4) in the ion-exchanger be：NaBH4Or NaHSO3Or CF3SO3Na solution.
Purification of nitrogen oxides agent produced by the present invention is with the stronger physical absorption function of silica gel or aluminum oxide and pyridine Salt [C8H10NO]+[BH4]-Or [C8H10NO]+[HSO3]-Or [C8H10NO]+[CF3SO3]-Chemical catalysis purification function, do not make With expensive noble metal catalyst, preparation cost is cheap, prepares simply, and silica gel or aluminum oxide and pyridiniujm [C8H10NO ]+[BH4]-Or [C8H10NO]+[HSO3]-Or [C8H10NO]+[CF3SO3]-By chemical key connection, be advantageous to the scattered of particulate, than Surface area is big, and detergent power is strong.
Brief description of the drawings
Fig. 1 is the schematic arrangement of the gained purification of nitrogen oxides agent of the inventive method embodiment 1.
Fig. 2 is the schematic arrangement of the gained purification of nitrogen oxides agent of the inventive method embodiment 2.
Embodiment
In order that those skilled in the art more fully understands technical scheme, and make the present invention features described above, Purpose and advantage become apparent from understandable, and with reference to embodiment, the present invention is described further.Embodiment is only used for The bright present invention rather than limitation the scope of the present invention.
Chemical reagent comes from Haiquan sunrise foreign trade Co., Ltd used in the following embodiments of the present invention.
The concentration of nitrogen oxides is to detect what is obtained using chemiluminescent NOx detector in the rear end of cleanser, The purification of nitrogen oxides agent sample that 12.00g is passed through with 1.00 liters/min of flow velocity using the gas of 700ppm nitrogen oxides simultaneously Product.Measure is when exit concentration is identical with entrance concentration, saturation purification capacity, i.e., the nitrogen oxides of every gram cleanser purification Amount.
Embodiment 1
Silica gel (molecular formula mSiO2·nH2O it is) chemicals with stronger physical absorption ability, pyridiniujm [C8H10NO]+[BH4]-Or [C8H10NO]+[HSO3]-Or [C8H10NO]+[CF3SO3]-It is with stronger chemical catalysis purification work( Energy.Both are bonded by the present embodiment using certain chemical reaction, prepare purification of nitrogen oxides agent.
The agent of the present embodiment purification of nitrogen oxides is made by the component of following parts by weight：Pyridiniujm [C8H10NO]+Cl-30g, silicon Glue 60g, KOH 9g or K2CO324g, chloroform 270g, pyridiniujm [C8H10NO]+Cl-By 50g epoxychloropropane and 42.7g pyrrole Pyridine reaction is prepared.
The preparation method of purification of nitrogen oxides agent comprises the following steps：
(1) pyridiniujm [C8H10NO]+Cl-Preparation：Weighing 50g epoxychloropropane, (molecular formula is [C8H10NO]+Cl-, rub Your quality is 92.52g/mol) in two mouthfuls of flasks, the mechanic whirl-nett reaction 0.5h in ice-water bath, then add 42.7g pyridines (molecular formula C5H5N, molal weight 79.1g/mol), add in 1h, continue to react 0.5h in ice-water bath, remove frozen water Bath, in 25 DEG C of stirring reaction 8h of room temperature, after reaction terminates, it is evaporated under reduced pressure, is cooled down rapidly in ice-water bath immediately, filter, product Dried 12 hours at 60 DEG C of vacuum after being washed with acetone；
(2) silica gel activating：By 60g silica gel (molecular formula mSiO2·nH2O) ground with mortar, with 0.30mm and 0.63mm Sieve is sieved, and takes diameter to be placed in 0.3-0.63mm particles in crucible, is calcined 4 hours at 500 DEG C, it is standby to be put into drier With；
(3) preparation of pyridiniujm modified silica-gel：By pyridiniujm [C obtained by step (1)8H10NO]+Cl-30g, which is added to, to be suspended with 270g chloroforms (the molecular formula CHCl of the silica obtained activation products silica gel nano-particle of step 2)3, molal weight 119.38g/ Mol in), 9g KOH or 24g K are then added under the atmosphere of nitrogen2CO3, the return stirring 24h at 90 DEG C, by products therefrom Centrifuge, after isolated solid is cleaned repeatedly with chloroform, then washed to neutrality, placement and be dried in vacuo with absolute ethyl alcohol Dried 20 hours at 80 DEG C in case；
(4) preparation of purification of nitrogen oxides agent：The pyridiniujm modified silica-gel that step (3) is prepared is dispersed in 2mol NaBH4Ion-exchanger in mechanical agitation 6 hours, carry out ion exchange, then filter, it is small to dry 20 at 80 DEG C in a vacuum When.
Ion-exchanger in the present embodiment can use NaHSO containing 2mol3Or CF3SO3Na solution replaces, the present embodiment In 60g silica gel can be replaced with 60g aluminum oxide.
The chemical constitution of the preparation-obtained purification of nitrogen oxides agent of the present embodiment please join shown in Fig. 1, after tested, this technology The purification of nitrogen oxides agent saturation purification capacity that scheme is prepared is 140mg/g, far above the purification of general purification agent for treating waste gas Capacity.
Embodiment 2
Aluminum oxide (Al2O3, molal weight 101.96g/mol) and it is the chemicals with stronger physical absorption ability, pyridine Salt [C8H10NO]+[BH4]-Or [C8H10NO]+[HSO3]-Or [C8H10NO]+[CF3SO3]-It is to be purified with stronger chemical catalysis Function.Both are bonded by the present embodiment using certain chemical reaction, prepare purification of nitrogen oxides agent.
The agent of the present embodiment purification of nitrogen oxides is made by the component of following parts by weight：Pyridiniujm [C8H10NO]+Cl-30g, silicon Glue 45g, KOH 4.5g or K2CO322.5g, chloroform 135g, pyridiniujm [C8H10NO]+Cl-By 50g epoxychloropropane and 42.7g Pyridine reaction be prepared.
The preparation method of the purification of nitrogen oxides agent of the present embodiment comprises the following steps：
(1) pyridiniujm [C8H10NO]+Cl-Preparation：50g epoxychloropropane is weighed in two mouthfuls of flasks, the machine in ice-water bath Tool stirring reaction 0.5h, 42.7g pyridines are then added, is added in 1h, is continued to react 0.5h in ice-water bath, remove ice-water bath, In 25 DEG C of stirring reaction 8h at room temperature, after reaction terminates, it is evaporated under reduced pressure, is cooled down rapidly in ice-water bath immediately, filter, product is used Dried 24 hours at 60 DEG C of vacuum after acetone washing；
(2) aluminum oxide activating：By 45g aluminum oxide (Al2O3, molal weight 101.96g/mol), ground, used with mortar 0.30mm and 0.63mm sieves are sieved, and take diameter to be placed in 0.3-0.6mm particles in crucible, and it is small that 3-4 is calcined at 500 DEG C When, it is standby to be put into drier；
(3) preparation of pyridiniujm modification aluminum oxide：By pyridiniujm [C obtained by step (1)8H10NO]+Cl-30g is added to suspension Have in the 135g chloroforms of activation products alumina nanoparticles obtained by step (2), then add 7.5gKOH under the atmosphere of nitrogen Or 22.5g K2CO3, return stirring 20h, products therefrom is centrifuged at 80 DEG C, and isolated solid chloroform is anti- After multiple cleaning, then washed to neutrality with absolute ethyl alcohol, place in vacuum drying chamber and dried 15 hours at 80 DEG C；
(4) preparation of cleanser：The pyridiniujm that step (3) is prepared modifies alumina dispersion comprising 2mol NaHSO3Solution in mechanical agitation 6 hours, carry out ion exchange, then filter, dry 20 hours i.e. at 80 DEG C in a vacuum Can.
The chemical constitution of the preparation-obtained purification of nitrogen oxides agent of the present embodiment please join shown in Fig. 2, after tested, this technology The purification of nitrogen oxides agent saturation purification capacity that scheme is prepared is 134mg/g, far above the purification of general purification agent for treating waste gas Capacity.
Ion-exchanger in the present embodiment can use NaBH containing 2mol4Or CF3SO3Na solution replaces, the present embodiment In 45g aluminum oxide can be replaced with 45g silica gel.
Embodiment 3
Aluminum oxide and silica gel are the chemicals with stronger physical absorption ability, pyridiniujm [C8H10NO]+[BH4]-Or [C8H10NO]+[HSO3]-Or [C8H10NO]+[CF3SO3]-With stronger chemical catalysis purification function.The present embodiment is using necessarily Chemical reaction both are bonded, prepare purification of nitrogen oxides agent.
The agent of the present embodiment purification of nitrogen oxides is made by the component of following parts by weight：Pyridiniujm [C8H10NO]+Cl-30g, oxygen Change aluminium (or silica gel) 90g, KOH 12g or K2CO325.5g, chloroform 450g, pyridiniujm [C8H10NO]+Cl-By 50g epoxy chloropropionate The reaction of alkane and 42.7g pyridine is prepared.
(1) pyridiniujm [C8H10NO]+Cl-Preparation：50g epoxychloropropane is weighed in two mouthfuls of flasks, the machine in ice-water bath Tool stirring reaction 0.5h, 42.7g pyridines are then added, is added in 1h, is continued to react 0.5h in ice-water bath, remove ice-water bath, In 25 DEG C of stirring reaction 8h at room temperature, after reaction terminates, it is evaporated under reduced pressure, is cooled down rapidly in ice-water bath immediately, filter, product is used Dried 24 hours at 60 DEG C of vacuum after acetone washing；
(2) aluminum oxide activating：90g aluminum oxide is ground with mortar, sieved with 0.30mm and 0.63mm sieves, cut-off Footpath is placed in crucible in 0.3-0.6mm particles, and 3-4 hours are calcined at 500 DEG C, it is standby to be put into drier；
(3) preparation of pyridiniujm modification aluminum oxide：By pyridiniujm [C obtained by step (1)8H10NO]+Cl-30g is added to suspension Have in the 450g chloroforms of activation products alumina nanoparticles obtained by step (2), then add 12gKOH under the atmosphere of nitrogen Or 25.5g K2CO3, return stirring 20h, products therefrom is centrifuged at 80 DEG C, and isolated solid chloroform is anti- After multiple cleaning, then washed to neutrality with absolute ethyl alcohol, place in vacuum drying chamber and dried 15 hours at 80 DEG C；
(4) preparation of purification of nitrogen oxides agent：The pyridiniujm modification alumina dispersion that step (3) is prepared comprising 2mol CF3SO3Mechanical agitation 6 hours in Na solution, ion exchange is carried out, is then filtered, dry 20 at 80 DEG C in a vacuum Hour.
The chemical constitution of the preparation-obtained purification of nitrogen oxides agent of the present embodiment please join shown in Fig. 2 (or Fig. 1), through surveying Examination, the purification of nitrogen oxides agent saturation purification capacity that the technical program is prepared is 150mg/g, far above general tail gas clean-up The purification capacity of agent.
Ion-exchanger in the present embodiment can use NaHSO containing 2mol3Or NaBH4Solution replace.
Purification of nitrogen oxides agent produced by the present invention is with the stronger physical absorption function of silica gel or aluminum oxide and pyridine Salt [C8H10NO]+[BH4]-Or [C8H10NO]+[HSO3]-Or [C8H10NO]+[CF3SO3]-Chemical catalysis purification function, do not make With expensive noble metal catalyst, preparation cost is cheap, prepares simply, and silica gel or aluminum oxide and pyridiniujm [C8H10NO ]+[BH4]-Or [C8H10NO]+[HSO3]-Or [C8H10NO]+[CF3SO3]-By chemical key connection, be advantageous to the scattered of particulate, than Surface area is big, and detergent power is strong.
Above-mentioned embodiment is used for illustrative purposes only, and is not limitation of the present invention, relevant technical field Those of ordinary skill, can be so that various changes can be made and modification without departing from the spirit and scope of the present invention, therefore institute There is equivalent technical scheme also to belong to scope of the invention.

Claims (4)

  1. A kind of 1. preparation method of purification of nitrogen oxides agent, it is characterised in that：It is made by the component of following parts by weight：Pyridiniujm [C8H10NO]+Cl-10 parts, silica gel mSiO2·nH2O or aluminum oxide 15-30 parts, KOH 2.5-4.0 parts or K2CO37.5-8.5 parts, Chloroform 45-150 parts, the pyridiniujm [C8H10NO]+Cl-It is prepared by the quantitative response of the materials such as epoxychloropropane and pyridine；Bag Include following steps：
    1) pyridiniujm [C8H10NO]+Cl-Preparation：A certain amount of epoxychloropropane is weighed in two mouthfuls of flasks, the machine in ice-water bath Tool stirring reaction 0.5h, the then amount of material such as addition and epoxychloropropane pyridine, in being added in 1h, continue in ice-water bath 0.5h is reacted, removes ice-water bath afterwards, in 25 DEG C of stirring reaction 4-8h at room temperature, after reaction terminates, is evaporated under reduced pressure immediately, in ice Cool down rapidly, filter in water-bath, product dries 12-24 hours after being washed with acetone at 60 DEG C of vacuum；
    2) silica gel mSiO2·nH2O or aluminum oxide activating：By silica gel mSiO2·nH2O or aluminum oxide are ground with mortar, are with aperture 0.30mm and 0.63mm sieves are sieved, and take diameter to be placed in 0.3-0.63mm particles in crucible, and 3-4 is calcined at 500 DEG C Hour, it is standby to be put into drier；
    3) pyridiniujm modified silica-gel mSiO2·nH2O or aluminum oxide preparation：By 10 parts of pyridiniujm [C obtained by step 1)8H10NO]+ Cl-It is added to and is suspended with 45-150 part chloroforms of activation products silica gel or alumina nanoparticles obtained by the step 2) of 15-30 parts In, it is then respectively adding the KOH or 7.5-8.5 of 2.5-4.0 parts K2CO3Under the atmosphere of nitrogen, flow back and stir at 60-90 DEG C Mix 24h, products therefrom centrifuged, after isolated solid is cleaned repeatedly with chloroform, then with absolute ethyl alcohol wash to Neutrality, place and dry 10-20 hours in vacuum drying chamber at a temperature of 60-80 DEG C；
    4) preparation of purification of nitrogen oxides agent：The pyridiniujm modified silica-gel or alumina dispersion that step 3) is prepared are in ion Mechanical agitation 4-6 hours in exchanger, ion exchange is carried out, is then filtered, dry 10-20 at a temperature of 60-80 DEG C in a vacuum Hour；The ion-exchanger is：NaBH4Or NaHSO3Or CF3SO3Na solution.
  2. A kind of 2. preparation method of purification of nitrogen oxides agent according to claim 1, it is characterised in that：By following parts by weight Component be made：Pyridiniujm [C8H10NO]+Cl-10 parts, silica gel mSiO2·nH220 parts of 20 parts of O or aluminum oxide, 3 parts of KOH or K2CO38 parts, 90 parts of chloroform.
  3. A kind of 3. preparation method of purification of nitrogen oxides agent according to claim 1, it is characterised in that：By following parts by weight Component be made：Pyridiniujm [C8H10NO]+Cl-10 parts, silica gel mSiO2·nH215 parts of O or aluminum oxide, K2CO32.5 parts or K2CO37.5th, 45 parts of chloroform.
  4. A kind of 4. preparation method of purification of nitrogen oxides agent according to claim 1, it is characterised in that：By following parts by weight Component be made：Pyridiniujm [C8H10NO]+Cl-10 parts, silica gel mSiO2·nH230 parts of O or aluminum oxide, K2CO34 parts or K2CO3 8.5 parts, 150 parts of chloroform.
CN201711105962.3A 2016-04-22 2016-04-22 A kind of preparation method of purification of nitrogen oxides agent Withdrawn CN107684825A (en)

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