CN101507932A - Preparation method of material capable of removing hydrogen sulphide and thiol - Google Patents
Preparation method of material capable of removing hydrogen sulphide and thiol Download PDFInfo
- Publication number
- CN101507932A CN101507932A CNA2008100797738A CN200810079773A CN101507932A CN 101507932 A CN101507932 A CN 101507932A CN A2008100797738 A CNA2008100797738 A CN A2008100797738A CN 200810079773 A CN200810079773 A CN 200810079773A CN 101507932 A CN101507932 A CN 101507932A
- Authority
- CN
- China
- Prior art keywords
- hydrogen sulfide
- carrier
- resin
- mercaptan
- heavy metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention relates to a method for preparing a material which can remove hydrogen sulfide and mercaptan at the same time. A carrier containing one or more of functional groups of -SO3<->, -COOH, -COO<-> and -NHx is soaked in a solution of heavy metal and stirred, and the carrier is picked up, washed by waster and put in a ventilated place for natural drying to obtain the material. By adopting the ion exchange and/or chelation technology, the metal ion is fixed on the surface of the carrier to prepare the material, so that the material has the characteristics of stable active components, difficult loss of active components, big adsorption quantity and good dynamic performance, and can quickly and thoroughly remove the hydrogen sulfide and mercaptan in high efficiency.
Description
Technical field
The present invention relates to a kind ofly can be used for removing in the gas simultaneously or the preparation method of the solid material of hydrogen sulfide and mercaptan in the liquid, belong to field of material preparation.
Background technology
Hydrogen sulfide has the rotten egg smell, and mercaptan has strong garlic smell, and its threshold of feelings is respectively 0.0005mg/m
3And 0.0002mg/m
3Even gas concentration is very low in the air, also can smell strong stink.Hydrogen sulfide and mercaptan are harmful, and they all can stimulate people's central nervous system, and symptom such as can produce headache when concentration is low, feel sick is when concentration is high even also can cause the respiratory system paralysis and death.In the air that contains hydrogen sulfide and/or mercaptan, work, serious harm the health of human body.The concentration of China's workshop air sanitary standard regulation hydrogen sulfide can not surpass 10mg/m
3, and formulated relevant Chinese diagnosis of occupational disease national standard---" management of occupational acute hydrogen sulfide poisoning diagnostic criteria ".The former Soviet Union also stipulates the maximum permissible concentration 1mg/m of ethyl mercaptan in the workshop air
3Hydrogen sulfide seldom uses industrial, and the hydrogen sulfide of contact mostly is the product of chemical reaction or protein natural degradation or exists with the impurity form; Mercaptan can be used as the raw material etc. of intermediate, thiofide or the bactericide of some medicines, but in most cases, mercaptan is unwanted, the waste gas that is produced in the exploitation of base oil and refining, coal gasification and the gas extraction process often contains mercaptan, it need be removed to reach the environmental emission standard during discharging.
The methods of oxidation that adopt are removed hydrogen sulfide and/or mercaptan more in the industrial production, and sewage treatment plant adopts hypochlorous acid or potassium permanganate that hydrogen sulfide is become the higher sulfur dioxide of the threshold of feelings with mercaptan oxidation more, to reduce airborne stink.Yet sulfur dioxide is the main component of acid rain, adopts this method removing hydrogen sulfide and/or mercaptan easily to cause air secondary to pollute.
Chinese patent CN 200580018146.8, " method of removing that comprises hydrogen sulfide and mercaptan sulfides " discloses a kind of method that can remove hydrogen sulfide and mercaptan simultaneously, promptly use 2-bromo-2-nitro the third-1,3-glycol diacetate absorbing hydrogen sulphide or mercaptan sulfides, thereby with its removing.The method that this method adopts liquid to absorb is removed hydrogen sulfide and mercaptan, and absorption plant is bigger, carries absorption liquid in the exit gas easily secretly, causes secondary pollution.
The method of single clear hydrogen sulfide or mercaptan is more, disclose three kinds of methods of removing hydrogen sulfide respectively as " removing the method for hydrogen sulfide ", " by reclaiming sulphur in the hydrogen sulfide containing gas " and " hydrogen sulfide in the oxidation removal gas ", they all are to utilize the redox character of hydrogen sulfide to adopt different oxidants to remove hydrogen sulfide; " have the copper carboxylate type resin material that removes the mercaptan effect ", " polymeric material with dethiol action ", " a kind of regenerable resin material with dethiol action ", " having cellulosic material of dethiol action and preparation method thereof " four patents disclose four kinds of materials with dethiol action respectively.These four patents have similitude, and they have protected the material that can be used for removing mercaptan of the method preparation that loads bivalent cupric ion on the carrier of different shape respectively.The material or the method for seven above-mentioned patent disclosures can only be removed single material.Adopt single method to remove hydrogen sulfide and mercaptan expense height, apparatus is big, and is uneconomical.
Summary of the invention:
In order to overcome the shortcoming of prior art, the invention provides a kind of preparation methods that can remove hydrogen sulfide and mercaptan simultaneously, its stable performance, safe and reliable, simple to operate, easily realize suitability for industrialized production, can remove in the gas simultaneously or the solid material of hydrogen sulfide and/or mercaptan in the liquid.The workshop stink that this material can be used for removing that oil exploitation is refining, papermaking, chemical fertilizer manufacturing, chemical fibre manufacturing and some industrial chemicals manufacturing etc. can produce hydrogen sulfide and/or mercaptan industry; At the bottom of also available this material is done adsorbent preparation and is fit to coal mine, the mask worn of special occasions operating personnel such as sewer; Can also be that adsorbent prepares the deodorizing air purifier with this material, be used to remove the stink of indoor toilets.
The present invention is a kind of solid material that can remove hydrogen sulfide and mercaptan simultaneously that utilizes ionic bond and/or coordinate bond effect that carrier and heavy metal ion are combined and be prepared from.This material is to contain-SO
3 -,-COOH ,-COO
-And/or-NH
xThe solid of group is a carrier, is the activated centre with the heavy metal ion, and carrier is immersed in the heavy metal ion solution, after the taking-up, washes with water and dries naturally in the ventilation and be prepared from.
A kind of carrier that can remove the material of hydrogen sulfide and mercaptan simultaneously can be resin, fiber or active carbon.The resin type carrier can be that faintly acid PMA cationoid exchanger resin, faintly acid polymethyl methacrylate cationoid exchanger resin, faintly acid polyacrylonitrile resinoid, faintly acid carboxylic acid type phenolic aldehyde are ion exchange resin, strong-basicity styrene series cationic ion-exchange resin, polystyrene chelating ion exchange resin, alkalescent epoxy type anion exchange resin; The fibrous type carrier can be the faintly acid polyacrylonitrile fibre and the alkalescent polyacrylonitrile fibre of modification; Absorbent charcoal carrier can be the faintly acid active carbon and the alkalescent active carbon of chemical modification.
The resin type carrier can also be according to Chinese patent " a kind of chelating resin and the synthetic method " (patent No.: the CN02129052.0) vector resin of disclosed method preparation.This method discloses a kind of containing-COO
-With-NH
xThe preparation method of chelating resin, be about to the macroreticular resin exchange and go up heavy metal ion; Utilize the chelating ability of heavy metal ion and macromolecule amine, the macromolecule amination is adsorbed onto the macroreticular resin matrix surface; The macromolecule amine that utilizes the polyaldehyde crosslinking agent will be adsorbed on the macroreticular resin matrix surface is cross-linked with each other, securely attached on the matrix resin; Last soda acid wash-out typing, obtain to contain-COO-and-NH
xThe resin type carrier.
The fibrous type carrier can also be according to " a kind of chelating function fiber and the synthetic method " (patent No.: the CN02129051.2) carrier fibre of disclosed method preparation.This method discloses a kind of containing-COO
-With-NH
xThe preparation method of chelate fibre, promptly at matrix acrylic fiber surface chemistry coating last layer polymine, and make polymine stably anchor at fiber surface by crosslinking agent to make.
A kind of activated centre heavy metal ion that can remove the material of hydrogen sulfide and mercaptan simultaneously, its solution can be Cu
2+, Zn
2+, Fe
2+, Pb
2+, Cu
+, Ag
+, Hg
2+, or Cu
2+, Zn
2+, Fe
2+, Pb
2+, Cu
+, Ag
+, Hg
2+In any mixed solution of two or more ion arbitrary proportions.
The invention provides a kind of resin material that can remove hydrogen sulfide and mercaptan simultaneously with the preparation method, this solid material is to contain-SO
3 -,-COOH ,-COO
-,-NH
xIn the solid matter of one or more functional groups be carrier, be the activated centre with the heavy metal ion, between carrier and the heavy metal ion with ionic bond and/or coordinate bond combination.This method is that carrier is immersed in a period of time in the heavy metal solution of finite concentration and solid-to-liquid ratio, ceaselessly stirs; After the taking-up, wash resin with water, and place the ventilation to dry naturally to be prepared from.
The carrier of this material can be resin, fiber or active carbon.The resin type carrier can be that faintly acid PMA cationoid exchanger resin, faintly acid polymethyl methacrylate cationoid exchanger resin, faintly acid polyacrylonitrile resinoid, faintly acid carboxylic acid type phenolic aldehyde are ion exchange resin, strong-basicity styrene series cationic ion-exchange resin, polystyrene chelating ion exchange resin, alkalescent epoxy type anion exchange resin; The fibrous type carrier can be the faintly acid polyacrylonitrile fibre and the alkalescent polyacrylonitrile fibre of modification; Absorbent charcoal carrier can be the faintly acid active carbon and the alkalescent active carbon of chemical modification.The activated centre heavy metal ion can be Cu
2+, Zn
2+, Fe
2+, Pb
2+, Cu
+, Ag
+, Hg
2+, also can be the mixture of the arbitrary proportion of above-mentioned metal ion.The heavy metal ion solution concentration can be 0.01～35%, and concentration is lower than 0.01%, and the material activity center that is prepared into is less, removes poor-performing; Concentration is higher than 35%, then can cause unnecessary waste, and wherein Zui You concentration range is 1～15%.The time that carrier floods in heavy metal solution can be 10min～10h, contains the heavy metal ion that body can adsorb appropriate amount between at this moment, has guaranteed that material removes the performance of hydrogen sulfide and mercaptan.The ratio (solid-to-liquid ratio) of the volume of the volume of vector resin and heavy metal ion solution can be 1:15～150, and when being lower than 1:15, carrier soaks into not saturating, causes finished-product material heavy metal activated centre skewness; Be higher than 1:150, then can increase the treating capacity of waste liquid, contaminated environment.
The present invention has following advantage: (1) raw material source is abundant, and preparation technology is simple, and preparation process is controlled easily; (2) adopting heavy metal ion is the activated centre, and material is removed effect stability, and dynamic performance is better, and is safe and reliable; (3) utilize fixedly heavy metal ion of ionic bond and/or coordinate bond, activated centre stable performance, difficult drop-off; (4) product form is various, can be prepared into fibrous type, resin type or active carbon type material according to user's demand; (5) aspect air cleaning, the filter core that can be used as air purifier, oil exploitation is refining in order to remove, papermaking, chemical fertilizer manufacturing, chemical fibre manufacturing and some industrial chemicals manufacturing etc. can produce the workshop stink of hydrogen sulfide and/or mercaptan industry or the stink between domestic hygiene; (6) aspect special material prepares, this material can be used as the packing material of the mouth mask that special occasions uses.
Its carrier of material provided by the present invention can also be to contain can change into-SO
3 -,-COOH ,-COO
-And/or-NH
xThe resin of group, fiber or active carbon.
Specific embodiment
The preparation of A, material
Embodiment 1
Take by weighing 5g commercially available-COOH type D113 resin (acidulous acrylic acid's cation exchanger resin), be immersed in 35% the copper-bath, time 5h, solid-to-liquid ratio is 1:15, ceaselessly stirs; After taking out resin, water cleans and dries naturally, and obtaining copper content is the resin of copper of 3.4mmol/g.
Embodiment 2
Weighing 5g Amberlite XAD-7HP (PMA class polymeric adsorbent) puts into conical flask, and to the NaOH solution 150mL that wherein adds 5%, hydrolysis 1h under 100 ℃ of conditions, water suction filtration clean to neutral, acquisition-COO
-The type vector resin.It is in 5% the solution of zinc sulfate that this vector resin is immersed in concentration, time 3h, and solid-to-liquid ratio is 1:50, ceaselessly stirs; After taking out resin, water cleans and dries naturally, and obtaining zinc content is the zinc resin of 0.8mmol/g.
Embodiment 3
Will according to Chinese patent " a kind of chelating resin and synthetic method " preparation-COO
-,-NH
xThe type carrier is immersed in concentration and is in 0.01% the liquor argenti nitratis ophthalmicus, time 2h, and solid-to-liquid ratio is 1:150, ceaselessly stirs; After taking out resin, water cleans and dries naturally, and obtaining silver content is the silver resin of 1.0mmol/g.
Embodiment 4
Take by weighing 5g commercially available-N (COO
-)
2Type D751 resin (polystyrene chelating ion exchange resin) is immersed in 1% the copper-bath, time 10h, and solid-to-liquid ratio is 1:75, ceaselessly stirs; After taking out resin, water cleans and dries naturally, and obtaining copper content is the resin of copper of 0.25mmol/g.
Embodiment 5
Take by weighing 5g strong-basicity styrene series cationic ion-exchange resin, be immersed in 20% the cuprous chloride solution, time 5h, solid-to-liquid ratio is 1:60, ceaselessly stirs; After taking out resin, water cleans and dries naturally, and obtaining copper content is the cuprous resin of 1.8mmol/g.
Embodiment 6
With 1g according to Chinese patent " a kind of chelating function fiber and synthetic method " preparation-COO
-,-NH
xThe type carrier fibre is immersed in concentration and is in 3% the copper-bath, time 10min, and solid-to-liquid ratio is 1:100, ceaselessly stirs; After taking out fiber, water cleans and dries naturally, and obtaining copper content is the copper fiber of 0.45mmol/g.
Embodiment 7
Take by weighing 1g and contain-the faintly acid polyacrylonitrile fibre of COOH functional group, be immersed in concentration and be in 15% the solution of zinc sulfate, time 8h, solid-to-liquid ratio is 1:50, ceaselessly stirs; After taking out fiber, water cleans and dries naturally, and obtaining zinc content is the zinc fiber of 2.5mmol/g.
Embodiment 8
Take by weighing 3g faintly acid active carbon, be immersed in concentration and be in 8% the solution of ferrous chloride, time 10h, solid-to-liquid ratio is 1:120; After taking out active carbon, water cleans and dries naturally, and obtaining iron-holder is the ferrous active carbon of 3.1mmol/g.
Embodiment 9
Take by weighing 3g faintly acid active carbon, be immersed in concentration and be in 5% the lead acetate solution, time 6h, solid-to-liquid ratio is 1:100; After taking out active carbon, water cleans and dries naturally, and obtaining lead tolerance is the plumbous active carbon of 1.2mmol/g.
Embodiment 10
Take by weighing 3g faintly acid active carbon, be immersed in concentration and be in 0.5% the mercuric nitrate solution, time 8h, solid-to-liquid ratio is 1:90; After taking out active carbon, water cleans and dries naturally, and obtaining mercury content is the mercury active carbon of 0.6mmol/g.
Embodiment 11
Take by weighing 3g alkalescent active carbon, be immersed in copper ion concentration and be 3%, zinc ion concentration is in 2% the solution, time 5h, solid-to-liquid ratio is 1:30; After taking out active carbon, water cleans and dries naturally, and the acquisition copper content is that 0.3mmol/g, zinc content are the active carbon of 0.2mmol/g.
B, foul smell are removed experiment
1 in the airtight glass container of 30L, injects 10mL/m
3Foul smell, and measure the concentration of residual gas.Be blank constituent concentration.
2 materials that 5g is prepared according to A are placed in the airtight glass container of 30L, inject 10mL/m
3Foul smell, open agitation fan operation 10min, in container, gas is sampled behind the 30min, and measures residual gas concentration.Be remaining constituent concentration.
Deodorizing rate (%)=[(the blank constituent concentration of foul smell-remaining foul smell constituent concentration)/blank constituent concentration of foul smell] * 100%
Table 1 has provided the effect of different kind of material removing hydrogen sulfide and mercaptan.
Table 1
Claims (8)
1, a kind of preparation methods that can remove hydrogen sulfide and mercaptan simultaneously is characterized in that: will contain-SO
3 -,-COOH ,-COO
-,-NH
xIn the carrier of one or more functional groups be immersed in the heavy metal solution, stir, take out carrier, wash with water and place the ventilation to dry naturally and get final product.
2, the preparation methods of removing hydrogen sulfide and mercaptan simultaneously according to claim 1 is characterized in that: described carrier is for containing-SO
3 -,-COOH ,-COO
-,-NH
xIn resin, fiber or the active carbon of one or more functional groups.
3, the preparation methods of removing hydrogen sulfide and mercaptan simultaneously according to claim 2 is characterized in that: described resin type carrier is that faintly acid PMA cationoid exchanger resin, faintly acid polymethyl methacrylate cationoid exchanger resin, faintly acid polyacrylonitrile resinoid, faintly acid carboxylic acid type phenolic aldehyde are ion exchange resin, strong-basicity styrene series cationic ion-exchange resin, polystyrene chelating ion exchange resin or alkalescent epoxy type anion exchange resin; Faintly acid polyacrylonitrile fibre that described fibrous type carrier is modification or weakly alkaline polyacrylonitrile fibre; Described absorbent charcoal carrier is the faintly acid active carbon or the alkalescent active carbon of chemical modification.
4, the preparation methods of removing hydrogen sulfide and mercaptan simultaneously according to claim 1 is characterized in that: described heavy metal ion is Cu
2+, Zn
2+, Fe
2+, Pb
2+, Cu
+, Ag
+, Hg
2+In any one or multiple.
5, according to claim 1 or the 4 described preparation methods of removing hydrogen sulfide and mercaptan simultaneously, it is characterized in that: described heavy metal ion solution concentration is 0.01～35%.
6, the preparation methods of removing hydrogen sulfide and mercaptan simultaneously according to claim 5 is characterized in that: described heavy metal ion solution concentration is 1～15%.
7, the preparation methods of removing hydrogen sulfide and mercaptan simultaneously according to claim 1, it is characterized in that: the time that described carrier floods in heavy metal solution is 10min～10h.
8, the preparation methods of removing hydrogen sulfide and mercaptan simultaneously according to claim 1 is characterized in that: the volume of described carrier is that solid-to-liquid ratio is 1:15～150 with the ratio of the volume of heavy metal ion solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100797738A CN101507932A (en) | 2008-11-09 | 2008-11-09 | Preparation method of material capable of removing hydrogen sulphide and thiol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100797738A CN101507932A (en) | 2008-11-09 | 2008-11-09 | Preparation method of material capable of removing hydrogen sulphide and thiol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101507932A true CN101507932A (en) | 2009-08-19 |
Family
ID=41000559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100797738A Pending CN101507932A (en) | 2008-11-09 | 2008-11-09 | Preparation method of material capable of removing hydrogen sulphide and thiol |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101507932A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101874981B (en) * | 2009-12-10 | 2012-06-06 | 攀钢集团钢铁钒钛股份有限公司 | Method for regenerating desulfurizer |
| CN102617281A (en) * | 2011-01-28 | 2012-08-01 | 株式会社大赛璐 | Method for removing sulfur compound from alcohol |
| CN102711954A (en) * | 2010-11-15 | 2012-10-03 | 康宁股份有限公司 | Carboxylic acid salt articles and methods of making and using them |
| CN103459561A (en) * | 2011-03-24 | 2013-12-18 | 贝克休斯公司 | Synergistic H2S/mercaptan scavengers using glyoxal |
| CN103506071A (en) * | 2012-06-19 | 2014-01-15 | 中国石油化工股份有限公司 | Purificant used for absorbing hydrogen sulfide and carbonyl sulfide in tail gas of natural gas and preparation method thereof |
| CN109310982A (en) * | 2016-06-28 | 2019-02-05 | 株式会社可乐丽 | For removing the composition of sulfur-containing compound |
| CN110475598A (en) * | 2017-06-11 | 2019-11-19 | Msa技术有限公司 | Filter for sulphur compound |
| CN111715031A (en) * | 2020-06-24 | 2020-09-29 | 江西师范大学 | Carbon dioxide absorption medium and optimization process thereof |
| CN115301297A (en) * | 2022-08-02 | 2022-11-08 | 陕西海斯夫生物工程有限公司 | Cation exchange resin loaded with nano silver particles, preparation method and application thereof |
-
2008
- 2008-11-09 CN CNA2008100797738A patent/CN101507932A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101874981B (en) * | 2009-12-10 | 2012-06-06 | 攀钢集团钢铁钒钛股份有限公司 | Method for regenerating desulfurizer |
| CN102711954A (en) * | 2010-11-15 | 2012-10-03 | 康宁股份有限公司 | Carboxylic acid salt articles and methods of making and using them |
| CN102711954B (en) * | 2010-11-15 | 2014-12-10 | 康宁股份有限公司 | Carboxylic acid salt articles and methods of making and using them |
| CN102617281A (en) * | 2011-01-28 | 2012-08-01 | 株式会社大赛璐 | Method for removing sulfur compound from alcohol |
| US9260669B2 (en) | 2011-03-24 | 2016-02-16 | Baker Hughes Incorporated | Synergistic H2S/mercaptan scavengers using glyoxal |
| CN103459561A (en) * | 2011-03-24 | 2013-12-18 | 贝克休斯公司 | Synergistic H2S/mercaptan scavengers using glyoxal |
| CN103459561B (en) * | 2011-03-24 | 2016-03-30 | 贝克休斯公司 | Use oxalic dialdehyde collaborative H 2s/ mercaptan scavenging agent |
| CN103506071B (en) * | 2012-06-19 | 2015-09-16 | 中国石油化工股份有限公司 | For the purificant and preparation method thereof of hydrogen sulfide and cos in absorbed natural gas tail gas |
| CN103506071A (en) * | 2012-06-19 | 2014-01-15 | 中国石油化工股份有限公司 | Purificant used for absorbing hydrogen sulfide and carbonyl sulfide in tail gas of natural gas and preparation method thereof |
| CN109310982A (en) * | 2016-06-28 | 2019-02-05 | 株式会社可乐丽 | For removing the composition of sulfur-containing compound |
| US11291947B2 (en) | 2016-06-28 | 2022-04-05 | Kuraray Co., Ltd. | Composition for removing sulfur-containing compound |
| CN110475598A (en) * | 2017-06-11 | 2019-11-19 | Msa技术有限公司 | Filter for sulphur compound |
| CN111715031A (en) * | 2020-06-24 | 2020-09-29 | 江西师范大学 | Carbon dioxide absorption medium and optimization process thereof |
| CN115301297A (en) * | 2022-08-02 | 2022-11-08 | 陕西海斯夫生物工程有限公司 | Cation exchange resin loaded with nano silver particles, preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101507932A (en) | Preparation method of material capable of removing hydrogen sulphide and thiol | |
| Qu et al. | Multi-component adsorption of Pb (II), Cd (II) and Ni (II) onto microwave-functionalized cellulose: Kinetics, isotherms, thermodynamics, mechanisms and application for electroplating wastewater purification | |
| Deng et al. | Biosorption of copper (II) and lead (II) from aqueous solutions by nonliving green algae Cladophora fascicularis: equilibrium, kinetics and environmental effects | |
| CN105032151B (en) | Air purification method and device | |
| Hegde et al. | Bio-inspired materials for defluoridation of water: a review | |
| CN105056882A (en) | Preparation method of modified charcoal-based adsorbent for removing hydrogen sulfide | |
| CN100389869C (en) | Process for preparing bean skin biosorption | |
| Yusuff et al. | ZnCl2-modified eucalyptus bark biochar as adsorbent: preparation, characterization and its application in adsorption of Cr (VI) from aqueous solutions | |
| CN104888748A (en) | Modified meerschaum, preparation method and application thereof | |
| CN108970397A (en) | A kind of air purifying composition, preparation and preparation method thereof | |
| CN1850637A (en) | Method for preparing efficient heavy metalion adsorbent carbon hydroxy apatite | |
| CN110330091A (en) | Magnetic green material function Carbon fibe and its preparation method and application based on the catalysis of light Fenton | |
| CN111362746A (en) | Repairing agent and repairing method for heavy metal contaminated soil | |
| US20210170361A1 (en) | Starch-based carbon composite and use thereof in selective and efficient adsorption of mercury ion and methylene blue | |
| CN110711485A (en) | Waste gas purification device for sewage treatment station of sterile raw material medicine production line | |
| CN106362701A (en) | Biomass-based heavy metal porous chelate fiber, and preparation method, application and application method thereof | |
| CN106076248A (en) | A kind of preparation method of rare earth modified flyash | |
| CN106861642A (en) | A kind of preparation and application of the biomass-based hydrogel with high absorption capacity | |
| CN104941573A (en) | Manganite-loaded adsorbent and preparation method thereof as well as application of manganite-loaded adsorbent in treating chemical nickel plating waste liquid | |
| CN108772038B (en) | Adsorbent for removing lead ions in water and preparation method and application thereof | |
| CN109759024A (en) | A kind of preparation method of the light sorbent based on plant cellulose | |
| CN104906616B (en) | A kind of preparation method of environment-friendly type deodorant | |
| CN103990435A (en) | Tourmaline/graft modification sulfur-containing graphene oxide composite adsorption material and preparation method thereof | |
| CN103990436A (en) | Tourmaline/graft modified sulfur-containing reduction-oxidation graphene composite adsorbing material and preparation method thereof | |
| CN103212390B (en) | In-situ regeneration method of trichloromethane-adsorbed saturating activated carbon |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20090819 |