CN106587058B - A kind of KOH activation method prepares the recycling of the KOH in super-activated carbon technique and absorbent charcoal fine purification method - Google Patents
A kind of KOH activation method prepares the recycling of the KOH in super-activated carbon technique and absorbent charcoal fine purification method Download PDFInfo
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Abstract
The invention discloses a kind of KOH activation methods to prepare the recycling of the KOH in super-activated carbon technique and absorbent charcoal fine purification method, it include: the high concentration of KOH and its derivative recycling in activated material, KOH, the rinsing of water, the rinsing of pickle processing and deionized water are recycled in boiling in autoclave.KOH recycling and absorbent charcoal fine purification method of the invention, can solve the Safety production questions of super-activated carbon；After activation, the KOH of the overwhelming majority can be recycled by washing, greatly reduces the production cost of super-activated carbon；May finally make the content of ashes of super-activated carbon be reduced to 0.5% hereinafter, solve KOH activation process in high-purity activity charcoal manufacturing technology problem, for super-activated carbon production capacitor electrode material industrial production technology is provided.
Description
Technical field
The invention belongs to chemical production technical fields, and in particular to a kind of KOH activation method is prepared in super-activated carbon technique
KOH recycling with absorbent charcoal fine purification method.
Background technique
Super-activated carbon is that a kind of specific surface area is greater than 2000m2The novel porous matter Carbon Materials of/g, it is in super electric double layer
There is wide application in the fields such as capacitor electrode material, catalyst carrier, gas separation, hydrogen and natural gas storing material
Prospect.Therefore, super-activated carbon has become the novel charcoal material competitively developed in world's Carbon Materials industry in the past 20 years.System at present
The main method of standby active carbon with high specific surface area is chemistry for activation method, and chemical reagent mainly includes alkali metal compound, such as
KOH, NaOH and K2CO3, wherein activation effect is best for KOH.Therefore when preparing super-activated carbon, KOH is mostly used to activate greatly
Method.Currently, the super-activated carbon of KOH activation method preparation is mainly as electrode material for super capacitor, the application requirement electrode material
Expect that active carbon has very high purity, content of ashes requires to be lower than 0.5%, and some even requires to be lower than 0.1%, compares ash content
Content is much lower in the ash content of the normal activated carbon of 4-10% or so, therefore, is preparing the same of active carbon with high specific surface area
When, the purification of active carbon is to improve one of the key technology of active carbon electrochemical applications performance.Due to the industrialization of KOH activation method
Production still belongs to the starting stage at present, therefore, recycling and the purification of active carbon of the KOH largely used in activation process etc.
Postprocessing working procedures are not all resolved, and the application of the industrialized production and activated carbon product that constrain KOH activation method significantly pushes away
Extensively.
During KOH activation prepares active carbon with high specific surface area, it usually needs using 3-4 times of KOH of material quantity, because
This, develops the K generated containing a large amount of KOH and KOH in activated material2O、K2CO3With simple substance potassium, they are all dissolved in water, can adopt
It is recycled with the dissolution mechanism of water.KOH is activated in active carbon obtained containing raw material charcoal bring ash content and in KOH activation process
In due to components such as KOH and silica react the ash content ingredient generated, after causing KOH to activate, the ash content of active carbon have compared with
It is significantly raised.And the purpose of preparation high-purity activity charcoal is unable to reach using single acid cleaning process.And due to being activated in KOH
In the process, the simple substance potassium and its oxide of generation may penetrate into the inside configuration of charcoal, increase the difficulty of absorbent charcoal fine purification.Cause
This, needs to develop special recycling and purification techniques, can be only achieved preferable effect.
Summary of the invention
The KOH in super-activated carbon technique is prepared technical problem to be solved by the invention is to provide a kind of KOH activation method
Recycling and absorbent charcoal fine purification method not only recycle KOH, but also prepare high-purity active carbon with high specific surface area.
Technical principle of the invention is as follows:
Studies have shown that reacting for (1) and (2) mainly occurs with raw material charcoal for KOH in KOH activation process:
6KOH+2C=2K2CO3+2K+3H2 (1)
2KOH=K2O+H2O (2)
Therefore, KOH and its derivative are recycled, can be realized using the method for water dissolution, but since the dosage of KOH is very big,
And repeatedly recycling is needed, it can be only achieved preferable recovery efficiency.
Ash impurities in active carbon, composition is with the position in carbon structure with raw material sources and manufacturing equipment and work
The difference of skill and have different.But they mainly contain the metallic compounds such as metal oxide and carbonate and dioxy
The nonmetallic compounds such as SiClx.And since ash content is in inside carbon structure, the difficulty of removal is considerably increased.
In order to solve the above technical problems, The technical solution adopted by the invention is as follows:
A kind of KOH activation method prepares the recycling of the KOH in super-activated carbon technique and absorbent charcoal fine purification method, including following step
It is rapid:
(1) by low concentration KOH solution and activated material mixed dissolution, stirring, be isolated by filtration, obtain solid carbon with it is highly concentrated
KOH solution is spent, the high concentration KOH solution is recycled and obtains solid KOH；
(2) low concentration KOH solution is mixed with the activated material being obtained by filtration, 100 DEG C or more is warming up in autoclave, is stirred
It mixes, is then separated by filtration to obtain solid carbon and KOH solution, KOH solution is recycled in next group activated material treatment process and uses；So
The remaining low concentration KOH solution of solid carbon is rinsed into filtering for several times afterwards, successively obtains the KOH of solid carbon and serial low concentration
Solution；The KOH solution of serial low concentration is recycled in next group activated material treatment process and uses；
(3) after rinsing solid carbon with water again, sulfuric acid or the hydrochloric acid solution rinsing of low concentration, filtering is then added；
(4) for several times with deionized water rinsing solid carbon, filtering is dried to obtain high-purity activity charcoal product.
The KOH activation method prepares the recycling of the KOH in super-activated carbon technique and absorbent charcoal fine purification method, continuous more
Secondary KOH is recycled in removal process, forms KOH concentration gradient from high to low, and the KOH solution of maximum concentration passes through evaporation water
Divide and realize recycling, remaining KOH solution from high to low successively becomes the dip lotion of next group activated material, final to realize whole return
It receives.
In step (1), the volume ratio 1.3-2:1 of low concentration KOH solution and charcoal.
In step (2), the volume ratio 1.3-2:1 of KOH solution and charcoal.
In step (2), for the pressure that autoclave uses for 2-10 kilograms, temperature is 100-150 DEG C.
In step (3), used acid is 0.5~2% hydrochloric acid or sulfuric acid.
In step (3), the volume ratio of low concentration acid solution and charcoal is 1.5-3.0:1.
In step (3), low concentration acid rinse temperature is at 50-90 DEG C.
It in step (4), is rinsed using deionized water, the volume ratio 1.0-2:1 of deionized water and charcoal.
In step (4), deionized water rinsing times 2-4 times.
The utility model has the advantages that compared with prior art, KOH activation method of the invention prepares the KOH in super-activated carbon technique and returns
Receipts and absorbent charcoal fine purification method, have the advantage that
1) KOH and its derivative in activated material are continuously recycled by the low concentration KOH solution of concentration gradient, may be implemented
KOH frontal convolution is received.
2) high pressure hydration for using low concentration KOH solution can substantially reduce the ash content of active carbon to 1-4%.
It 3), can be by the ash of active carbon using the high-pressure impregnation of low concentration KOH solution, washing, pickling and deionization washing
Divide and be reduced to 0.1%, prepares high-purity active carbon with high specific surface area.
4) the KOH recycling and process for refining that this technology provides are easy, are convenient for continuous operation, are conducive to the production of KOH activation method
The industrialized production of super-activated carbon.
Specific embodiment
According to following embodiments, the present invention may be better understood.However, as it will be easily appreciated by one skilled in the art that real
It applies specific material proportion, process conditions and its result described in example and is merely to illustrate the present invention, without that should will not limit
The present invention described in detail in claims processed.
In order to implement foregoing invention scheme, tested using the activated material that KOH activation is prepared, the following examples
The preparation condition of used KOH activated material is: KOH and the alkali charcoal ratio of coconut husk charcoal are 4:1, and activation phenomenon is nitrogen, heating speed
Rate 5K/min, constant temperature 1 hour, is cooled to 100 DEG C or less taking-up activated materials under a nitrogen by 800 DEG C of activation temperature.
In order to be best understood from the following examples, in first activated material that recycling is activated using above-mentioned KOH
KOH during, all recycled using water.The KOH for all using water to replace various concentration i.e. first, second, third and fourth ...
Solution, by filtering, they successively obtain the KOH solution of concentration from high to low, i.e. the concentration gradient liquid of KOH solution.Work as beginning
When the recycling of next group activated material, successively using recycle that this mass products material obtains second and third, four ... KOH solution it is dense
Spend gradient liquid.Last consignment of activated material i.e. in the following examples is it can be understood that this activated material.
It is usually recycled in the removal process of a collection of activated material 5 times, that is, forms the KOH solution gradient of 5 kinds of various concentrations
Liquid, the sequence of their concentration range from high to low is successively: the high concentration KOH solution concentration formed for the first time is greater than 80%
(mass percent, similarly hereinafter), concentration depend on the dosage of activator KOH in activation process；Second and third, four and five KOH
Solution concentration is 20-30%, 10-20%, 5-10%, 1-5% respectively, less than 1%.
Embodiment 1
Activated material and last consignment of are recycled into obtained low concentration KOH solution for the second time according to the ratio that volume ratio is 1.5:1
Mixed dissolution stirs, is separated by filtration charcoal and KOH solution, obtains high concentration KOH solution and solid carbon；The high concentration KOH solution can
To recycle to obtain solid KOH using evaporation mode.Then last consignment of third time is recycled into the low concentration that KOH is obtained in activated material
KOH solution is successively mixed with the activated material being obtained by filtration, and 110 DEG C are warming up in autoclave, and is forced into 5 kilograms of pressure, is stirred
It mixes, is then separated by filtration to obtain solid carbon and low concentration KOH solution；Then successively last consignment of fourth, fifth ... is recycled to obtain
Low concentration KOH solution, according to the volume ratio of KOH solution and solid carbon be 1.5:1 ratio mixing impregnate solid carbon 3 times, often
Secondary soaking time 2 hours, is separated by filtration solid carbon and low concentration KOH solution；After KOH recovery process, rinsed with water primary
Then solid carbon is the hydrochloric acid that 1.5:1 is added that mass percent is 1% according to the volume of acid solution and solid carbon in solid carbon
Solution is rinsed, filtering；Finally rinsed charcoal 3 times according to the ratio deionized water that the volume ratio of water and solid carbon is 1.5:1,
Filtering, is dried to obtain activated carbon product.According to national standards with the content of ashes and potassium of atomic absorption spectrometry active carbon
Constituent content, the result is shown in tables 1.
Embodiment 2
Activated material and last consignment of are recycled into obtained low concentration KOH solution for the second time according to the ratio that volume ratio is 1.5:1
Mixed dissolution stirs, is separated by filtration charcoal and KOH solution, obtains high concentration KOH solution and charcoal；The high concentration KOH solution can adopt
It is recycled to obtain solid KOH with evaporation mode.Then it is molten last consignment of third time to be recycled into the low concentration KOH that KOH is obtained in activated material
Liquid is successively mixed with the activated material being obtained by filtration, and 120 DEG C are warming up in autoclave, and is forced into 5 kilograms of pressure, stirring, so
After be separated by filtration to obtain solid carbon and low concentration KOH solution；Then successively last consignment of fourth, fifth ... is recycled low dense
KOH solution is spent, the ratio mixing for being 1.5:1 according to KOH solution and the volume ratio of charcoal is impregnated active carbon 3 times, each soaking time 2
Hour, it is separated by filtration charcoal and low concentration KOH solution；After KOH recovery process, a charcoal is rinsed with water, is then pressed in charcoal
Volume according to acid solution and charcoal is that the hydrochloric acid solution that 2.0:1 addition mass percent is 1% is rinsed, and is filtered；Finally according to
The ratio deionized water that the volume ratio of water and charcoal is 1.5:1 rinses charcoal 3 times, and filtering is dried to obtain activated carbon product.According to state
The content of ashes and Determination of Potassium of family standard and atomic absorption spectrometry active carbon, the result is shown in tables 1.
Embodiment 3
Activated material and last consignment of are recycled into obtained low concentration KOH solution for the second time according to the ratio that volume ratio is 1.5:1
Mixed dissolution stirs, is separated by filtration charcoal and KOH solution, obtains high concentration KOH solution and charcoal；The high concentration KOH solution can adopt
It is recycled to obtain solid KOH with evaporation mode.Then it is molten last consignment of third time to be recycled into the low concentration KOH that KOH is obtained in activated material
Liquid is successively mixed with the activated material being obtained by filtration, and 120 DEG C are warming up in autoclave, and is forced into 8 kilograms of pressure, stirring, so
After be separated by filtration to obtain solid carbon and low concentration KOH solution；Then successively last consignment of fourth, fifth ... is recycled low dense
KOH solution is spent, the ratio mixing for being 1.5:1 according to KOH solution and the volume ratio of charcoal is impregnated active carbon 3 times, each soaking time 2
Hour, it is separated by filtration charcoal and low concentration KOH solution；After KOH recovery process, a charcoal is rinsed with water, is then pressed in charcoal
Volume according to acid solution and charcoal is that the hydrochloric acid solution that 2.5:1 addition mass percent is 1% is rinsed, and is filtered；Finally according to
The ratio deionized water that the volume ratio of water and charcoal is 2.0:1 rinses charcoal 3 times, and filtering is dried to obtain activated carbon product.According to state
The content of ashes and Determination of Potassium of family standard and atomic absorption spectrometry active carbon, the result is shown in tables 1.
Embodiment 4
Activated material and last consignment of are recycled into obtained low concentration KOH solution for the second time according to the ratio that volume ratio is 1.5:1
Mixed dissolution stirs, is separated by filtration charcoal and KOH solution, obtains high concentration KOH solution and charcoal；The high concentration KOH solution can adopt
It is recycled to obtain solid KOH with evaporation mode.Then it is molten last consignment of third time to be recycled into the low concentration KOH that KOH is obtained in activated material
Liquid is successively mixed with the activated material being obtained by filtration, and 120 DEG C are warming up in autoclave, and is forced into 5 kilograms of pressure, stirring, so
After be separated by filtration to obtain solid carbon and low concentration KOH solution；Then successively last consignment of fourth, fifth ... is recycled low dense
KOH solution is spent, the ratio mixing for being 1.5:1 according to KOH solution and the volume ratio of charcoal is impregnated active carbon 3 times, each soaking time 2
Hour, it is separated by filtration charcoal and low concentration KOH solution；After KOH recovery process, a charcoal is rinsed with water, is then pressed in charcoal
Volume according to acid solution and charcoal is that the hydrochloric acid solution that 2.5:1 addition mass percent is 1% is rinsed, and is filtered；Finally according to
The ratio deionized water that the volume ratio of water and charcoal is 1.5:1 rinses charcoal 3 times, and filtering is dried to obtain activated carbon product.According to state
The content of ashes and Determination of Potassium of family standard and atomic absorption spectrometry active carbon, the result is shown in tables 1.
Embodiment 5
Activated material and last consignment of are recycled into obtained low concentration KOH solution for the second time according to the ratio that volume ratio is 1.5:1
Mixed dissolution stirs, is separated by filtration charcoal and KOH solution, obtains high concentration KOH solution and charcoal；The high concentration KOH solution can adopt
It is recycled to obtain solid KOH with evaporation mode.Then it is molten last consignment of third time to be recycled into the low concentration KOH that KOH is obtained in activated material
Liquid is successively mixed with the activated material being obtained by filtration, and 140 DEG C are warming up in autoclave, and is forced into 8 kilograms of pressure, stirring, so
After be separated by filtration to obtain solid carbon and low concentration KOH solution；Then successively last consignment of fourth, fifth ... is recycled low dense
KOH solution is spent, the ratio mixing for being 1.5:1 according to KOH solution and the volume ratio of charcoal is impregnated active carbon 3 times, each soaking time 2
Hour, it is separated by filtration charcoal and low concentration KOH solution；After KOH recovery process, a charcoal is rinsed with water, is then pressed in charcoal
Volume according to acid solution and charcoal is that the hydrochloric acid solution that 2.5:1 addition mass percent is 1.5% is rinsed, and is filtered；Finally press
It is rinsed charcoal 3 times according to the ratio deionized water that the volume ratio of water and charcoal is 1.5:1, filtering is dried to obtain activated carbon product.According to
The content of ashes and Determination of Potassium of national standard and atomic absorption spectrometry active carbon, the result is shown in tables 1.
Embodiment 6
Activated material and last consignment of are recycled into obtained low concentration KOH solution for the second time according to the ratio that volume ratio is 1.5:1
Mixed dissolution stirs, is separated by filtration charcoal and KOH solution, obtains high concentration KOH solution and charcoal；The high concentration KOH solution can adopt
It is recycled to obtain solid KOH with evaporation mode.Then it is molten last consignment of third time to be recycled into the low concentration KOH that KOH is obtained in activated material
Liquid is successively mixed with the activated material being obtained by filtration, and 120 DEG C are warming up in autoclave, and is forced into 5 kilograms of pressure, stirring, so
After be separated by filtration to obtain solid carbon and low concentration KOH solution；Then successively last consignment of fourth, fifth ... is recycled low dense
KOH solution is spent, the ratio mixing for being 2.0:1 according to KOH solution and the volume ratio of charcoal is impregnated active carbon 3 times, each soaking time 2
Hour, it is separated by filtration charcoal and low concentration KOH solution；After KOH recovery process, a charcoal is rinsed with water, is then pressed in charcoal
Volume according to acid solution and charcoal is that the hydrochloric acid solution that 2.5:1 addition mass percent is 0.5% is rinsed, and is filtered；Finally press
It is rinsed charcoal 3 times according to the ratio deionized water that the volume ratio of water and charcoal is 1.5:1, filtering is dried to obtain activated carbon product.According to
The content of ashes and Determination of Potassium of national standard and atomic absorption spectrometry active carbon, the result is shown in tables 1.
Embodiment 7
Activated material and last consignment of are recycled into obtained low concentration KOH solution for the second time according to the ratio that volume ratio is 1.8:1
Mixed dissolution stirs, is separated by filtration charcoal and KOH solution, obtains high concentration KOH solution and charcoal；The high concentration KOH solution can adopt
It is recycled to obtain solid KOH with evaporation mode.Then it is molten last consignment of third time to be recycled into the low concentration KOH that KOH is obtained in activated material
Liquid is successively mixed with the activated material being obtained by filtration, be warming up in autoclave 130 DEG C with, and be forced into 8 kilograms of pressure, stir,
Then it is separated by filtration to obtain solid carbon and low concentration KOH solution；Then successively last consignment of fourth, fifth ... is recycled low
The ratio mixing that concentration KOH solution is 1.5:1 according to KOH solution and the volume ratio of charcoal is impregnated active carbon 3 times, when impregnating every time
Between 2 hours, be separated by filtration charcoal and low concentration KOH solution；After KOH recovery process, a charcoal is rinsed with water, then in charcoal
Volume according to acid solution and charcoal is that the hydrochloric acid solution that 2.5:1 addition mass percent is 1.5% is rinsed, and is filtered；Finally
It is rinsed charcoal 3 times according to the ratio deionized water that the volume ratio of water and charcoal is 2.0:1, filtering is dried to obtain activated carbon product.It presses
According to the content of ashes and Determination of Potassium of national standard and atomic absorption spectrometry active carbon, the result is shown in tables 1.
Comparative example 1
Activated material and last consignment of are recycled into obtained low concentration KOH solution for the second time according to the ratio that volume ratio is 1.5:1
Mixed dissolution stirs, is separated by filtration charcoal and KOH solution, obtains high concentration KOH solution and charcoal；The high concentration KOH solution can adopt
It is recycled to obtain solid KOH with evaporation mode.Then by last consignment of third and fourth, KOH is obtained not in five ... recycling activated materials
Active carbon, stirring, mistake are impregnated in the ratio mixing that KOH solution with concentration gradient is 1.5:1 according to KOH solution and the volume ratio of charcoal
Filter；After KOH recovery process, a charcoal is rinsed with water, is then 2.0:1 addition according to the volume of acid solution and charcoal in charcoal
The hydrochloric acid solution that mass percent is 1% is rinsed, and is filtered；Finally used according to the ratio that the volume ratio of water and charcoal is 1.5:1
Deionized water rinses charcoal 3 times, and filtering is dried to obtain activated carbon product.It is living with atomic absorption spectrometry according to national standards
The content of ashes and Determination of Potassium of property charcoal, the result is shown in tables 1.
Comparative example 2
Activated material and last consignment of are recycled into obtained low concentration KOH solution for the second time according to the ratio that volume ratio is 1.5:1
Mixed dissolution stirs, is separated by filtration charcoal and KOH solution, obtains high concentration KOH solution and charcoal；The high concentration KOH solution can adopt
It is recycled to obtain solid KOH with evaporation mode.Then it is molten last consignment of third time to be recycled into the low concentration KOH that KOH is obtained in activated material
Liquid is successively mixed with the activated material being obtained by filtration, and 120 DEG C are warming up in autoclave, and is forced into 5 kilograms of pressure, stirring, so
After be separated by filtration to obtain solid carbon and low concentration KOH solution；Then successively last consignment of fourth, fifth ... is recycled low dense
Spend KOH solution, impregnated active carbon 3 times according to the ratio mixing that KOH solution and the volume ratio of charcoal are 1.5:1, be separated by filtration charcoal with
Low concentration KOH solution；It after KOH recovery process, is rinsed charcoal 2-3 times with water, filtering is dried to obtain activated carbon product.According to
The content of ashes and Determination of Potassium of national standard and atomic absorption spectrometry active carbon, the result is shown in tables 1.
Comparative example 3
According to the ratio that volume ratio is 1.5:1 by activated material and water mixed dissolution, stir, be separated by filtration charcoal and KOH solution,
It repeats above operation 4 times, is separated by filtration to obtain active carbon；It then is 2.0:1 addition according to the volume of acid solution and charcoal in charcoal
The hydrochloric acid solution that mass percent is 1% is rinsed, and is filtered；Finally used according to the ratio that the volume ratio of water and charcoal is 1.5:1
Deionized water rinses charcoal 3 times, and filtering is dried to obtain activated carbon product.It is living with atomic absorption spectrometry according to national standards
The content of ashes and Determination of Potassium of property charcoal, the result is shown in tables 1.
Ash content, potassium content, specific surface area and the specific pore volume product of 1 active carbon of table
It can be seen that the step of not using increase pressure to embathe from the result of embodiment 2 and comparative example 2 and result in activity
The potassium content of charcoal ash content and active carbon obviously increases, and shows that the increase pressure in this method embathes returning for the highly beneficial KOH of step
The purification of receipts and later active charcoal.Meanwhile not implementing the step of pickling, cause the ash content of active carbon and potassium content to increase respectively
Add 12 times and 7 times, shows that acid pickling step has remarkable result for the purification of active carbon in this method.
Very little is differed with potassium content from embodiment 2 with the ash content that the result of comparative example 3 can be seen that active carbon.But due to
All it is the KOH solution using water instead of series of concentrations gradient in comparative example 3, not only creates a large amount of low concentration KOH solution
Waste water, and the dosage of water is considerably increased, the carrying capacity of environment of production process is considerably increased, and be the industrial production of serialization
Bring very big drawback.Therefore, do not have industrialized production meaning using the processing step of comparative example 3.
Claims (6)
1. a kind of KOH activation method prepares the recycling of the KOH in super-activated carbon technique and absorbent charcoal fine purification method, which is characterized in that
Step are as follows:
(1) it by low concentration KOH solution and activated material mixed dissolution, stirring, is isolated by filtration, obtains solid carbon and high concentration
KOH solution recycles the high concentration KOH solution and obtains solid KOH；
(2) low concentration KOH solution is mixed with the activated material being obtained by filtration, 100 DEG C or more is warming up in autoclave, stirred,
Then it is separated by filtration to obtain solid carbon and KOH solution, KOH solution is recycled in next group activated material treatment process and uses；Then
The remaining low concentration KOH solution of solid carbon is rinsed into filtering for several times, solid carbon is successively obtained and the KOH of serial low concentration is molten
Liquid；The KOH solution of serial low concentration is recycled in next group activated material treatment process and uses；
(3) after rinsing solid carbon with water again, the hydrochloric acid solution rinsing of low concentration, filtering is then added；
(4) for several times with deionized water rinsing solid carbon, filtering is dried to obtain high-purity activity charcoal product；
In the step (2), for the pressure that autoclave uses for 5~10 kilograms, temperature is 120~150 DEG C；
In the step (3), used acid is 1~2wt% hydrochloric acid；
In the step (3), the hydrochloric acid solution of low concentration and the volume ratio of charcoal are 2.5:1；
It in the step (4), is rinsed using deionized water, the volume ratio 1.5:1 of deionized water and charcoal.
2. KOH activation method according to claim 1 prepares the recycling of the KOH in super-activated carbon technique and absorbent charcoal fine purification side
Method forms KOH concentration gradient from high to low it is characterized in that: being recycled in removal process in continuous several times KOH, most highly concentrated
The KOH solution of degree realizes by evaporation water and recycles that remaining KOH solution from high to low successively becomes next group activated material
Dip lotion, it is final to realize all recycling.
3. KOH activation method according to claim 1 prepares the recycling of the KOH in super-activated carbon technique and absorbent charcoal fine purification side
Method, which is characterized in that in step (1), the volume ratio 1.3-2:1 of low concentration KOH solution and activated material.
4. KOH activation method according to claim 3 prepares the recycling of the KOH in super-activated carbon technique and absorbent charcoal fine purification side
Method, which is characterized in that in step (2), the volume ratio 1.3-2:1 of KOH solution and activated material.
5. KOH activation method according to claim 1 prepares the recycling of the KOH in super-activated carbon technique and absorbent charcoal fine purification side
Method, which is characterized in that in step (3), the hydrochloric acid rinse temperature of low concentration is at 50~90 DEG C.
6. KOH activation method according to claim 1 prepares the recycling of the KOH in super-activated carbon technique and absorbent charcoal fine purification side
Method, which is characterized in that in step (4), deionized water rinsing times 2~4 times.
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| CN102344136A (en) * | 2011-04-15 | 2012-02-08 | 山东轻工业学院 | Method for preparing active carbon by waste water sludge from chemical pulping and paper mill |
| CN102502621A (en) * | 2011-11-28 | 2012-06-20 | 中南大学 | Post-treatment process for preparing super-capacitor active carbon with super-low ash content |
| CN103641118A (en) * | 2013-12-26 | 2014-03-19 | 南京林业大学 | Production method of producing active carbon with high specific surface area by composite activator |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102344136A (en) * | 2011-04-15 | 2012-02-08 | 山东轻工业学院 | Method for preparing active carbon by waste water sludge from chemical pulping and paper mill |
| CN102502621A (en) * | 2011-11-28 | 2012-06-20 | 中南大学 | Post-treatment process for preparing super-capacitor active carbon with super-low ash content |
| CN103641118A (en) * | 2013-12-26 | 2014-03-19 | 南京林业大学 | Production method of producing active carbon with high specific surface area by composite activator |
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Effective date of registration: 20191210 Address after: 313200 No. 926 Changhong East Street, Fuxi Street, Deqing County, Huzhou City, Zhejiang Province (Mogan Mountain National High-tech Zone) Patentee after: Zhejiang Rui Neng charcoal Mstar Technology Ltd Address before: Longpan road Xuanwu District of Nanjing city of Jiangsu Province, No. 159 210037 Patentee before: Nanjing Forestry University |