CN103754868B - The preparation method of Decoloration of Xylose granulated active carbon and using method - Google Patents
The preparation method of Decoloration of Xylose granulated active carbon and using method Download PDFInfo
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Abstract
The present invention discloses a kind of preparation method and using method of Decoloration of Xylose granulated active carbon, belong to the preparation method of gac and using method field, its preparation method is: (A) gets the raw materials ready: by with wood chip be the phosphoric acid method powdered carbon of raw material, ACRYLIC EMULSION, water by ACRYLIC EMULSION: phosphoric acid method powdered carbon: water=0.37 ~ 0.39: the weight ratio of 1: 1 takes; (B) batch mixing: mix rear by the above-mentioned raw material taken and fully stir, particle, reaches and mix simultaneously; (C) grain forming: under the weighing apparatus temperature of 90 DEG C by nodulizer by shaping for the material extruding after mixing, make the particle of particle diameter 2 ~ 5mm, be cooled to 40 ~ 50 DEG C (D) and dry; (E) sorting cooling; Granulated active carbon absorption property prepared by present method is good, the liquid phase adsorption amount of unit volume far above other granulated active carbon, intensity is higher, acid and alkali-resistance, can regeneration, improves production environment.
Description
Technical field
The present invention relates to a kind of preparation method and using method of gac, particularly a kind of preparation method of Decoloration of Xylose granulated active carbon and using method.
Background technology
The conventional production method of Xylitol has chemical method or microbial method, these two kinds of methods are all by carrying out the production of Xylitol to the hydrolysate reductive action of D-wood sugar or the hemicellulose being rich in xylan, then at high temperature under high pressure, the pure wood sugar of catalytic hydrogenation.Except hydrolysis, be decolouring, scavenging process, therefore, in the production process of Xylitol, the decolouring of hydrolyzed solution occupies extremely important status.And in Xylose a large amount of pigments, nitrogen class material, phenolic compound, furfural and iron level, mostly be macromole saccharide compound.The manufacturing enterprise of current Decoloration of Xylose granulated active carbon is a lot, these granulated active carbons to mainly contain four kinds: one by production technique classification be directly coal dust is added tar and asphalt moulding, then carry out charcoal and activate and obtain ature of coal granulated active carbon; Two is as coconut husk or apricot husk as raw material obtain active fruit shell carbon through the activation of Physical charcoal by hard shell; Three is that wood chip and pharmaceutical chemicals are obtained wooden pressed active carbon as carried out charcoal activation after phosphoric acid plasticizing forming again; Four be the gac of excellent property is added binding agent extrusion molding again drying obtain granulated active carbon; the first two kind method, starting material are in short supply, and the production cycle is long; production cost is high; because be the activation of Physical charcoal, belong to micropore prosperity, namely pore texture is less than normal; be less than the molecular diameter by the pigment in the wood sugar that adsorbs and impurity; almost do not have decoloring ability to macromolecular saccharide compound, therefore it is poor to the adsorptive power of wood sugar, at Decoloration of Xylose field result of use extreme difference.Because only have when the pore texture of gac is slightly larger than the diameter of impurity or obnoxious flavour molecule, just can reach optimal adsorption effect when impurity or obnoxious flavour molecule can be allowed to enter completely, adsorption effect of activated carbon in water that is excessive or small holes gap structure is all undesirable.The proportion of phosphoric acid method powdered carbon in all gacs that the third method is made is the lightest, specific surface area is maximum, aperture, pore volume prosperity, there is the molecule in abundant large, medium and small aperture, decoloring ability is better than the first two and plants, but the bad and acid-fast alkali-proof ability of intensity and regeneration difficulty, gac single use is just scrapped, expend larger, and when throwing in powdered carbon, dust is many, work under bad environment, employee work intensity is large, and the 4th kind of method mainly uses as artwork with Physical powdered carbon is shaping.And above four kinds of gacs, its carbon atom plane layer forming gac in a jumble and be arranged at random " spiral shell laminate structure ", and is all be combined with each other with intermolecular forces, and therefore, abrasivity, the compressive strength of gac are all very poor.
Present functional xylitol is obtained by corresponding sugared hydrogenation, decolouring requires to reach lower residual concentration, gac molasses to very high absorption capacity should be adopted, and there is the gac of enough loading capacities under relatively low residual concentration condition, need gac not only macropore enrich, and there is enough large microporosity.Therefore a kind of shaping granulated active carbon is needed in market badly, not only checks colors and have very high absorption capacity, can adapt to the requirement of severe acid or alkali environment and reprocessing cycle use simultaneously.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preparation method under Xylose pigment residual concentration condition with the Decoloration of Xylose granulated active carbon of enough loading capacities; the Decoloration of Xylose granulated active carbon macropore prepared by the method enriches; and there is enough large microporosity, and can reprocessing cycle use.
The present invention proposes a kind of preparation method of Decoloration of Xylose granulated active carbon, comprises the following steps:
(A) get the raw materials ready: by with wood chip be the phosphoric acid method powdered carbon of raw material, ACRYLIC EMULSION, water by ACRYLIC EMULSION: phosphoric acid method powdered carbon: water=0.37 ~ 0.39: the weight ratio of 1: 1 takes, described ACRYLIC EMULSION water content is no more than 35%;
(B) batch mixing: the above-mentioned raw material taken mixed rear and fully stirs, smashing the particle formed in whipping process simultaneously, reach and mix;
(C) grain forming: by nodulizer under the constant temperature of 90 DEG C, by shaping for the material extruding after mixing, makes the particle of particle diameter 2 ~ 5mm, and softly being rolled by the cooling drum of shaping granulated active carbon through rotating is cooled to 40 ~ 50 DEG C;
(D) dry: to be placed in by cooled granulated active carbon by drying machine at the temperature of 150 ± 10 DEG C dry 30 minutes, dried granulated active carbon water ratio is 9% ~ 10%;
(E) sorting cooling: the granulated active carbon after making is sieved by grain size specification, and is cooled to less than 40 DEG C.
Preferably, in described material preparation step take wood chip as the phosphoric acid method powdered carbon of raw material is adopt particle diameter >=0.4mm, the China fir wood chip of moisture≤15%, by the powdered active carbon that phosphate impregnation, charing, activation, recovery, oven dry, pulverizing are produced afterwards, its granularity is 200mesh, methylene blue number >=160ml/g, iodine sorption value 1200mg/g.
In described batch mixing step, adopt coulter type mixer smashed by particle and stir, the drying machine adopted in described baking step is Vibratingfluidbeddrier.
The using method of the Decoloration of Xylose granulated active carbon that the present invention also provides a kind of preparation method according to claim 1 to obtain, comprises the following steps:
(A1) once decolour: be 75 DEG C by temperature, concentration is 6 ~ 10%, absorbancy is 0.410 ~ 0.489, transparence is the Xylose of 5.19 ~ 5.65% and is that the phosphoric acid method powdered carbon of raw material takes by following weight ratio with wood chip, phosphoric acid method powdered carbon: Xylose=1: (300 ~ 400), fully stirred by 20 ~ 30 minutes, phosphoric acid method powdered carbon is allowed fully to adsorb pigment in wood sugar, nitrogen class material, phenolic compound, furfural and iron ion, through high-pressure filteration, to phosphoric acid method powdered carbon leaches, obtaining absorbancy is 0.28 ~ 0.38, transparence is the initial filter Xylose of 42.0 ~ 52.0%.
(B2) secondary decolourization: Decoloration of Xylose granulated active carbon and described initial filter Xylose are taken by following mass ratio; granulated active carbon: initial filter Xylose=2.8 ~ 3.2: 100; the granulated active carbon taken is added initial filter Xylose; 50min is placed in water-bath; granulated active carbon is leached, obtains the finished product Xylose that absorbancy is 0.095 ~ 0.189, transparence is 68.5 ~ 79.9%.
Preferably, the preparation method of the Xylose in a described decolorization process is, put into sulfuric acid after corn cob is smashed to soak, the weight proportion of described sulfuric acid and corn cob is 1: 4.5 ~ 5, soak time is 8 ~ 10 hours, again soak solution to be placed at the high pressure of 0.6 ~ 0.7MPa, the temperature of 100 ~ 120 DEG C boiling 8 ~ 9 hours, to obtain Xylose.
The invention has the beneficial effects as follows: granulated active carbon prepared by (1) present method has density, thermal conductivity, intensity are higher, its intensity >=90%, simultaneously can be acidproof for a long time, and through overpickling, washing, drying, can reuse, regeneration efficiency is high, economizes on resources and production cost; (2) there is certain shape, and be easy to modulation and processing, input, produce and no dust pollution in use procedure, substantially improve production environment, reduce the labour intensity of workman, do not have the pollutant emission problems such as waste water,waste gas and industrial residue, clean environment firendly is pollution-free; (3) adsorptive capacity of good, the unit volume of absorption property is far above the granulated active carbon of other classifications; (4) storage, convenient transportation, is also easy to filtered and recycled simultaneously; (5) be not only applicable to various Sugarcane juice decolorization, be also applicable to the desolventing technology of the industry such as monosodium glutamate, wine brewing.Particularly in adsorption tanks or adsorption tower, gac is used all to need granulated active carbon.(6) " phosphoric acid method powdered carbon, ACRYLIC EMULSION, water are by ACRYLIC EMULSION: phosphoric acid method powdered carbon: water=0.38: 1: 1 " this proportioning in step of the present invention (A), it is the optimum proportion taken into account production control cost, raising powdered carbon abrasivity, compressive strength and absorption property and adopt, due to the pore texture hypertrophy of powdered carbon, moulding process must reduce blocking to its pore texture, destruction as much as possible, namely reduce the addition of cakingagent, reduce forming pressure, thus improve the specific surface area of pressed active carbon; And due to powdered carbon abrasivity, compressive strength all very poor, the physical strength that improve pressed active carbon must increase again the addition of cakingagent, improve forming pressure.(7) absorbancy of the initial filter Xylose in the using method of Decoloration of Xylose granulated active carbon of the present invention once after decolouring reaches about 0.28 ~ 0.38, transmittance about 42.0 ~ 52.0%, percent of decolourization is 55 ~ 62%, finished product Xylose after Decoloration of Xylose granulated active carbon secondary decolourization obtain the finished product Xylose that absorbancy is 0.095 ~ 0.189, transparence is 68.5 ~ 79.9%, adsorption effect obviously strengthens, and quality product significantly improves; (8) " granulated active carbon: initial filter Xylose=2.8 ~ 3.2: 100 " this proportioning in secondary decolourization in the using method of Decoloration of Xylose granulated active carbon of the present invention; take into account production control cost, improve decolorizing effect and the optimum proportion that adopts; if increase granulated active carbon consumption more on this basis; its decolorizing effect can be better, but production cost is higher.(9) in step (C) grain forming in preparation method of the present invention, the cooling drum of shaping granulated active carbon through rotating softly being rolled cooling, granulated active carbon can be avoided inter-adhesive, be beneficial to sizing.(10) particle diameter >=0.4mm is adopted, the China fir wood chip of moisture≤15% is that the phosphoric acid method powdered carbon of Raw material processing can, the main of gac is containing " C ", China fir wood chip is light and vegetables are loose, and carbon molecule is flourishing, and other wooden structures is tight, be applicable to making wood sugar macromolecules adsorption charcoal, and wood chip is utilization of waste material, namely utilize " saw wood ash ", production cost is lower.(11) ACRYLIC EMULSION refers to that chemical formula is the organic compound of C3H4O2, acrylicacidandesters class self or after mixing with other monomers, can generate homopolymer or multipolymer by polymerization reaction take place, serve as tackiness agent.Its composition is butyl acrylate, methyl methacrylate, methacrylic acid, alkylbenzene polyethers sodium sulfonate etc.The ACRYLIC EMULSION water content adopted in material preparation step is no more than 35%, being to there be desirable bonding effect, reaching the intensity of granulated active carbon, shut gac hole with exceeding again.(12) in the preparation of wooden grain liquid, adopt sulfuric acid soaking corn, its speed can be made to change into grain, then high compressed steam, because steam, corn cob and sulfuric acid are all moisture, after boiling, namely obtain the Xylose that concentration is 6 ~ 10%.
Applicant has also done following granulated active carbon and has tested Xylose decoloration performance:
Get 5 250mL Erlenmeyer flasks, eachly add 50mL Xylose, here be the Xylose stoste without any desolventing technology, add 1.00 respectively, 2.00,3.00,4.00, the pressed active carbon of 5.00g, 50min is placed in 70 DEG C of water-baths, filter, under 420nm, measure absorbance A, transparence T, calculate percent of decolourization η:
Absorbancy refers to that light is by the incident intensity before solution or a certain material and this light logarithm by the transmitted intensity ratio after solution or material, affect it because have solvent, concentration, temperature etc., absorbance A=abc, wherein a is specific absorbance, unit L/ (gcm), b are liquid layer thickness (being generally the thickness of cuvette), unit cm, c is strength of solution, unit g/L; Relation formula according to transparence T and absorbance A is A=-lgT, and percent of decolourization refers to by processing front transparence T
a, process after transparence, T
bcalculate and obtain, i.e. percent of decolourization=[lg (1-T
a)/lg (1-T
b)] * 100%.
In a word, present invention improves over the present situation that wood sugar liquid phase decolorizing effect is bad, and the requirement of severe acid or alkali environment and reprocessing cycle use can be adapted to; Xylose is after secondary decolourization, and color and luster aufhellung, is become faint yellow from brown, its transmittance increases substantially.
Embodiment
Embodiment one
The present embodiment proposes a kind of preparation method of Decoloration of Xylose granulated active carbon, comprises the following steps:
(A) get the raw materials ready: by with wood chip be the phosphoric acid method powdered carbon of raw material, ACRYLIC EMULSION, water by ACRYLIC EMULSION: phosphoric acid method powdered carbon: water=0.375: the weight ratio of 1: 1 takes, described ACRYLIC EMULSION water content 34%.
(B) batch mixing: the above-mentioned raw material taken mixed rear and fully stirs, smashing the particle formed in whipping process simultaneously, reach and mix;
(C) grain forming: by nodulizer under the constant temperature of 90 DEG C, by shaping for the material extruding after mixing, makes the particle of particle diameter 3mm, and softly being rolled by the cooling drum of shaping granulated active carbon through rotating is cooled to 40 ~ 50 DEG C;
(D) dry: to be placed in by cooled granulated active carbon by drying machine at the temperature of 145 DEG C dry 30 minutes, dried granulated active carbon water ratio is 10%;
(E) sorting cooling: the granulated active carbon after making is sieved by grain size specification, and is cooled to less than 40 DEG C
In described material preparation step take wood chip as the phosphoric acid method powdered carbon of raw material is adopt particle diameter >=0.4mm, the China fir wood chip of moisture≤15%, by the powdered active carbon that phosphate impregnation, charing, activation, recovery, oven dry, pulverizing are produced afterwards, its granularity is 200mesh, methylene blue number >=160ml/g, iodine sorption value 1200mg/g.In described batch mixing step, adopt coulter type mixer smashed by particle and stir, the drying machine adopted in described baking step is Vibratingfluidbeddrier.
The present embodiment also proposes the using method of the Decoloration of Xylose granulated active carbon that a kind of above-mentioned preparation method obtains, and comprises the following steps:
(A1) once decolour: be 75 DEG C by temperature, concentration is 7%, absorbancy is 0.410 ~ 0.489, transparence is the Xylose of 5.19 ~ 5.65% and is that the phosphoric acid method powdered carbon of raw material takes by following weight ratio with wood chip, phosphoric acid method powdered carbon: Xylose=1: 335, fully stirred by 20 ~ 30 minutes, phosphoric acid method powdered carbon is allowed fully to adsorb pigment in wood sugar, nitrogen class material, phenolic compound, furfural and iron ion, through high-pressure filteration, to phosphoric acid method powdered carbon leaches, obtaining absorbancy is 0.28 ~ 0.38, transparence is the initial filter Xylose of 42.0 ~ 52.0%.
(B2) secondary decolourization: Decoloration of Xylose granulated active carbon and described initial filter Xylose are taken by following mass ratio; granulated active carbon: initial filter Xylose=2.85: 100; the granulated active carbon taken is added initial filter Xylose; 50min is placed in water-bath; granulated active carbon is leached, obtains the finished product Xylose that absorbancy is 0.095 ~ 0.189, transparence is 68.5 ~ 79.9%.
The preparation method of the Xylose in a described decolorization process is, put into sulfuric acid after corn cob is smashed to soak, the weight proportion of described sulfuric acid and corn cob is 1: 4.6, soak time is 8.5 hours, again soak solution to be placed at the high pressure of 0.6 ~ 0.7MPa, the temperature of 100 ~ 120 DEG C boiling 8 ~ 9 hours, to obtain Xylose.
Embodiment two
The present embodiment proposes a kind of preparation method of Decoloration of Xylose granulated active carbon, comprises the following steps:
(A) get the raw materials ready: by with wood chip be the phosphoric acid method powdered carbon of raw material, ACRYLIC EMULSION, water by ACRYLIC EMULSION: phosphoric acid method powdered carbon: water=0.38: the weight ratio of 1: 1 takes, described ACRYLIC EMULSION water content 33%.
(B) batch mixing: the above-mentioned raw material taken mixed rear and fully stirs, smashing the particle formed in whipping process simultaneously, reach and mix;
(C) grain forming: by nodulizer under the constant temperature of 90 DEG C, by shaping for the material extruding after mixing, makes the particle of particle diameter 4mm, and softly being rolled by the cooling drum of shaping granulated active carbon through rotating is cooled to 40 ~ 50 DEG C;
(D) dry: to be placed in by cooled granulated active carbon by drying machine at the temperature of 150 DEG C dry 30 minutes, dried granulated active carbon water ratio is 9.5%;
(E) sorting cooling: the granulated active carbon after making is sieved by grain size specification, and is cooled to less than 40 DEG C
In described material preparation step take wood chip as the phosphoric acid method powdered carbon of raw material is adopt particle diameter >=0.4mm, the China fir wood chip of moisture≤15%, by the powdered active carbon produced afterwards by phosphate impregnation, charing, activation, recovery, oven dry, pulverizing, its granularity is 200mesh, methylene blue number >=160ml/g, iodine sorption value 1200mg/g.In described batch mixing step, adopt coulter type mixer smashed by particle and stir, the drying machine adopted in described baking step is Vibratingfluidbeddrier.
The present embodiment also proposes the using method of the Decoloration of Xylose granulated active carbon that a kind of above-mentioned preparation method obtains, and comprises the following steps:
(A1) once decolour: be 75 DEG C by temperature, concentration is 8%, absorbancy is 0.410 ~ 0.489, transparence is the Xylose of 5.19 ~ 5.65% and is that the phosphoric acid method powdered carbon of raw material takes by following weight ratio with wood chip, phosphoric acid method powdered carbon: Xylose=1: 357, fully stirred by 20 ~ 30 minutes, phosphoric acid method powdered carbon is allowed fully to adsorb pigment in wood sugar, nitrogen class material, phenolic compound, furfural and iron ion, through high-pressure filteration, to phosphoric acid method powdered carbon leaches, obtaining absorbancy is 0.28 ~ 0.38, transparence is the initial filter Xylose of 42.0 ~ 52.0%.
(B2) secondary decolourization: Decoloration of Xylose granulated active carbon and described initial filter Xylose are taken by following mass ratio; granulated active carbon: initial filter Xylose=3: 100; the granulated active carbon taken is added initial filter Xylose; 50min is placed in water-bath; granulated active carbon is leached, obtains the finished product Xylose that absorbancy is 0.095 ~ 0.189, transparence is 68.5 ~ 79.9%.
The preparation method of the Xylose in a described decolorization process is, put into sulfuric acid after corn cob is smashed to soak, the weight proportion of described sulfuric acid and corn cob is 1: 4.75, soak time is 9 hours, again soak solution to be placed at the high pressure of 0.6 ~ 0.7MPa, the temperature of 100 ~ 120 DEG C boiling 8 ~ 9 hours, to obtain Xylose.
Embodiment three
The present embodiment proposes a kind of preparation method of Decoloration of Xylose granulated active carbon, comprises the following steps:
(A) get the raw materials ready: by with wood chip be the phosphoric acid method powdered carbon of raw material, ACRYLIC EMULSION, water by ACRYLIC EMULSION: phosphoric acid method powdered carbon: water=0.385: the weight ratio of 1: 1 takes, described ACRYLIC EMULSION water content 32.5%.
(B) batch mixing: the above-mentioned raw material taken mixed rear and fully stirs, smashing the particle formed in whipping process simultaneously, reach and mix;
(C) grain forming: by nodulizer under the constant temperature of 90 DEG C, by shaping for the material extruding after mixing, makes the particle of particle diameter 4.5mm, and softly being rolled by the cooling drum of shaping granulated active carbon through rotating is cooled to 40 ~ 50 DEG C;
(D) dry: to be placed in by cooled granulated active carbon by drying machine at the temperature of 158 DEG C dry 30 minutes, dried granulated active carbon water ratio is 9.5%;
(E) sorting cooling: the granulated active carbon after making is sieved by grain size specification, and is cooled to less than 40 DEG C
In described material preparation step take wood chip as the phosphoric acid method powdered carbon of raw material is adopt particle diameter >=0.4mm, the China fir wood chip of moisture≤15%, by the powdered active carbon that phosphate impregnation, charing, activation, recovery, oven dry, pulverizing are produced afterwards, its granularity is 200mesh, methylene blue number >=160ml/g, iodine sorption value 1200mg/g.In described batch mixing step, adopt coulter type mixer smashed by particle and stir, the drying machine adopted in described baking step is Vibratingfluidbeddrier.
The present embodiment also proposes the using method of the Decoloration of Xylose granulated active carbon that a kind of above-mentioned preparation method obtains, and comprises the following steps:
(A1) once decolour: be 75 DEG C by temperature, concentration is 9%, absorbancy is 0.410 ~ 0.489, transparence is the Xylose of 5.19 ~ 5.65% and is that the phosphoric acid method powdered carbon of raw material takes by following weight ratio with wood chip, phosphoric acid method powdered carbon: Xylose=1: 385, fully stirred by 20 ~ 30 minutes, phosphoric acid method powdered carbon is allowed fully to adsorb pigment in wood sugar, nitrogen class material, phenolic compound, furfural and iron ion, through high-pressure filteration, to phosphoric acid method powdered carbon leaches, obtaining absorbancy is 0.28 ~ 0.38, transparence is the initial filter Xylose of 42.0 ~ 52.0%.
(B2) secondary decolourization: Decoloration of Xylose granulated active carbon and described initial filter Xylose are taken by following mass ratio; granulated active carbon: initial filter Xylose=3.1: 100; the granulated active carbon taken is added initial filter Xylose; 50min is placed in water-bath; granulated active carbon is leached, obtains the finished product Xylose that absorbancy is 0.095 ~ 0.189, transparence is 68.5 ~ 79.9%.
The preparation method of the Xylose in a described decolorization process is, put into sulfuric acid after corn cob is smashed to soak, the weight proportion of described sulfuric acid and corn cob is 1: 4.9, soak time is 9.5 hours, again soak solution to be placed at the high pressure of 0.6 ~ 0.7MPa, the temperature of 100 ~ 120 DEG C boiling 8 ~ 9 hours, to obtain Xylose.
Claims (5)
1. a preparation method for Decoloration of Xylose granulated active carbon, is characterized in that, comprises the following steps:
(A) get the raw materials ready: by with wood chip be the phosphoric acid method powdered carbon of raw material, ACRYLIC EMULSION, water by ACRYLIC EMULSION: phosphoric acid method powdered carbon: water=0.37 ~ 0.39: the weight ratio of 1: 1 takes, described ACRYLIC EMULSION water content is no more than 35%;
(B) batch mixing: the above-mentioned raw material taken mixed rear and fully stirs, smashing the particle formed in whipping process simultaneously, reach and mix;
(C) grain forming: by nodulizer under the constant temperature of 90 DEG C, by shaping for the material extruding after mixing, makes the particle of particle diameter 2 ~ 5mm, and softly being rolled by the cooling drum of shaping granulated active carbon through rotating is cooled to 40 ~ 50 DEG C;
(D) dry: to be placed in by cooled granulated active carbon by drying machine at the temperature of 150 ± 10 DEG C dry 30 minutes, dried granulated active carbon water ratio is 9% ~ 10%;
(E) sorting cooling: the granulated active carbon after making is sieved by grain size specification, and is cooled to less than 40 DEG C.
2. the using method of Decoloration of Xylose granulated active carbon that obtains of preparation method according to claim 1, is characterized in that, comprise the following steps:
(A1) once decolour: be 75 DEG C by temperature, concentration is 6 ~ 10%, absorbancy is 0.410 ~ 0.489, transparence is the Xylose of 5.19 ~ 5.65% and is that the phosphoric acid method powdered carbon of raw material takes by following weight ratio with wood chip, phosphoric acid method powdered carbon: Xylose=1: (300 ~ 400), fully stirred by 20 ~ 30 minutes, phosphoric acid method powdered carbon is allowed fully to adsorb pigment in wood sugar, nitrogen class material, phenolic compound, furfural and iron ion, through high-pressure filteration, to phosphoric acid method powdered carbon leaches, obtaining absorbancy is 0.28 ~ 0.38, transparence is the initial filter Xylose of 42.0 ~ 52.0%,
(B2) secondary decolourization: Decoloration of Xylose granulated active carbon and described initial filter Xylose are taken by following mass ratio; granulated active carbon: initial filter Xylose=2.8 ~ 3.2: 100; the granulated active carbon taken is added initial filter Xylose; 50min is placed in water-bath; granulated active carbon is leached, obtains the finished product Xylose that absorbancy is 0.095 ~ 0.189, transparence is 68.5 ~ 79.9%.
3. the preparation method of Decoloration of Xylose granulated active carbon according to claim 1; it is characterized in that; in described material preparation step take wood chip as the phosphoric acid method powdered carbon of raw material is adopt particle diameter >=0.4mm; the China fir wood chip of moisture≤15%; by the powdered active carbon that phosphate impregnation, charing, activation, recovery, oven dry, pulverizing are produced afterwards; its granularity is 200mesh, methylene blue number >=160ml/g, iodine sorption value 1200mg/g.
4. the preparation method of Decoloration of Xylose granulated active carbon according to claim 3; it is characterized in that; in described batch mixing step, adopt coulter type mixer smashed by particle and stir, the drying machine adopted in described baking step is Vibratingfluidbeddrier.
5. the using method of Decoloration of Xylose granulated active carbon according to claim 2; it is characterized in that; the preparation method of the Xylose in a described decolorization process is; put into sulfuric acid after corn cob is smashed to soak; the weight proportion of described sulfuric acid and corn cob is 1: 4.5 ~ 5; soak time is 8 ~ 10 hours, then soak solution to be placed at the high pressure of 0.6 ~ 0.7MPa, the temperature of 100 ~ 120 DEG C boiling 8 ~ 9 hours, obtains Xylose.
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| CN106000432B (en) * | 2016-05-24 | 2019-04-12 | 湖南宇洁活性炭环保科技有限公司 | Wood substance grain active carbon of supported catalyst for air cleaning and preparation method thereof |
| CN107433183A (en) * | 2017-09-19 | 2017-12-05 | 江苏科力特环保科技有限公司 | A kind of decolouring granular activated carbon |
| CN107792853A (en) * | 2017-11-28 | 2018-03-13 | 福建省鑫森炭业股份有限公司 | A kind of high intensity granular activated carbon for liquid phase desorption and preparation method thereof |
| CN114538435B (en) * | 2022-03-14 | 2023-09-19 | 桂东县湘浙活性炭有限公司 | Preparation method of plant active carbon for oil processing |
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| CN103409565A (en) * | 2013-07-26 | 2013-11-27 | 山东福田药业有限公司 | Preparation technology of xylose |
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