CN105944699A - Composite absorbent resin - Google Patents

Composite absorbent resin Download PDF

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CN105944699A
CN105944699A CN201610539518.1A CN201610539518A CN105944699A CN 105944699 A CN105944699 A CN 105944699A CN 201610539518 A CN201610539518 A CN 201610539518A CN 105944699 A CN105944699 A CN 105944699A
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acrylamide
total monomer
adsorbent
lpas
solution
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CN105944699B (en
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谢建军
姚庆鑫
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Central South University of Forestry and Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26—Synthetic macromolecular compounds
    • B01J20/265—Synthetic macromolecular compounds modified or post-treated polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
    • B01J20/3206—Organic carriers, supports or substrates
    • B01J20/3208—Polymeric carriers, supports or substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
    • B01J20/3242—Layers with a functional group, e.g. an affinity material, a ligand, a reactant or a complexing group
    • B01J20/3285—Coating or impregnation layers comprising different type of functional groups or interactions, e.g. different ligands in various parts of the sorbent, mixed mode, dual zone, bimodal, multimodal, ionic or hydrophobic, cationic or anionic, hydrophilic or hydrophobic
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F289/00—Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds not provided for in groups C08F251/00 - C08F287/00
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

The invention discloses composite absorbent resin. The composite absorbent resin is prepared through subjecting an adsorbent BLPAS, which serves as a raw material, to the following treatments: (1) putting 5g of the adsorbent BLPAS into 150mL to 250mL of 0.5mol/L to 2.0mol/L sodium hydroxide solution, and carrying out soaking for 1 to 3 hours at the temperature of 10 DEG C to 40 DEG C, thereby obtaining a mixed soaked substance; (2) heating the mixed soaked substance to the temperature of 70 DEG C to 100 DEG C, carrying out a reaction for 0.5 to 2.0 hours, carrying out filtration so as to obtain a reaction product, and rinsing the reaction product with distilled water until the rinsing effluent is neutral; (3) drying the reaction product at the temperature of 65 DEG C to 75 DEG C, crushing the reaction product, sieving the powder with a sieve with the pore size of 60 to 100 meshes, thereby obtaining the composite absorbent resin. By the treatment method, the ratio of chelation groups and ion exchange groups in a lignin-based adsorbent structure can be modified in a coordinated manner, and thus the performance of adsorption to heavy-metal ions is remarkably improved.

Description

A kind of composite adsorption resin
Technical field
The invention belongs to adsorbent preparing technical field, be specifically related to a kind of low cost, high-performance Lignin-base adsorbent for heavy metal.
Background technology
At present, it is relatively common that modified lignin resin is used as adsorbent for heavy metal, but existing modification It is modified that method is mostly low-molecular-weight, and product adsorption effect promotes the most notable.Solution Free Radical connects Branch copolymerization method can introduce a large amount of adsorption group in lignin structure, improves lignin simultaneously Relative molecular mass also improves space structure, significantly improves the absorption of lignin heavy metal ion Performance.
Inventor has a kind of lignin graft copolymerization compound adsorption resin of research and preparation side thereof in early days Method, is shown in Chinese invention patent, ZL 201310278489.4, and this adsorbent resin is to use this method Prepare lignin graft copolymerization with the common modification such as acrylamide, maleic anhydride and chitosan to be combined Adsorbent resin (hereinafter referred BLPAMA), achieves certain technique effect.But by horse The carboxylic group carrying out the introducing of anhydride modified lignin is weak ion-exchange group, to modified lignin resin The absorption property of heavy metal ion has certain restriction.
At present, it is relatively common for using chemical method modified lignin resin to be used as adsorbent for heavy metal , but existing lignin modification product is mostly gel-type adsorbent, and interior microcellular structure is poor, ratio Surface area is less, and adsorption group utilization rate is low in actual applications, and absorption property is poor.
On the basis of the studies above, inventor goes through research and the improvement of several years again, it is intended to Propose a kind of more excellent composite adsorption resin, can reduce while there is good adsorbent effect Composition, stable performance.
Summary of the invention
For the deficiencies in the prior art, it is contemplated that propose a kind of more excellent composite adsorption tree Fat, the method for the present invention, by processing original adsorbent, can coordinate modification after process Chelation group and the ratio of ion-exchange group in lignin-base sorbent structure, it is right to significantly improve The absorption property of heavy metal ion, obtains the composite adsorption resin of a kind of function admirable.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is:
A kind of composite adsorption resin, with adsorbent B LPAS as raw material, carries out following place by raw material Reason prepares:
(1) taking 5g adsorbent B LPAS and being placed in 150-250mL concentration is 0.5-2.0mol/L Sodium hydroxide solution at 10 DEG C～40 DEG C soak 1-3 hour, obtain mixing soak；
(2) then described mixing soak is heated to 70-100 DEG C of reaction 0.5-2.0h, filters Obtain product, with distilled water flushing, until washing effluent is neutrality；
(3) described product be dry, pulverize at 65 DEG C～75 DEG C, cross 60-100 mesh Sieve obtains composite adsorption resin (hereinafter referred BLPAS-S)；
Wherein, described adsorbent B LPAS is according to acrylamide and 2-acrylamide-2-methyl-prop Sulfonic acid is that total monomer calculates, and formula and content thereof is:
Acrylamide is (1-2.8) 2 with the mass ratio of 2-acrylamide-2-methyl propane sulfonic, Sodium lignin sulfonate is (0.5-2.0) 10 with the mass ratio of total monomer, The mass content of potassium peroxydisulfate is the 0.2%-0.5% of total monomer quality, N, N ' 0.1%-0.25% that mass content is total monomer quality of-methylene-bisacrylamide, Bentonitic mass content is the 2%-4% of total monomer quality.
Described room temperature is preferably 15 DEG C～30 DEG C.
Preferred version, described adsorbent B LPAS is according to acrylamide and 2-acrylamide-2-first Base propane sulfonic acid is that total monomer calculates, and formula and content thereof is:
Acrylamide is (1-2) 2 with the mass ratio of 2-acrylamide-2-methyl propane sulfonic, Sodium lignin sulfonate is (0.5-1.0) 10 with the mass ratio of total monomer, The mass content of potassium peroxydisulfate is the 0.25%-0.45% of total monomer quality, N, N ' 0.15%-0.25% that mass content is total monomer quality of-methylene-bisacrylamide, Bentonitic mass content is the 3% of total monomer quality.
Further preferably scheme, described adsorbent B LPAS is prepared by following methods:
1) weigh by above-mentioned formula that quantitative sodium lignin sulfonate is molten and acrylamide dissolves respectively In distilled water, obtain lignin sulfonic acid sodium water solution and acrylamide aqueous solution respectively；
2) be sequentially added in acrylamide aqueous solution 2-acrylamide-2-methyl propane sulfonic, Bentonite, N, N '-methylene-bisacrylamide, stirring, mix homogeneously, obtain solution A；
3) then solution A being joined in lignin sulfonic acid sodium water solution, regulation pH is 1.0-4.0, adds potassium peroxydisulfate, seals, and reacts 1.5h-2.5h at 60 DEG C-65 DEG C, At 70 DEG C-80 DEG C, react 1.5h-2.5h again, then react at 85 DEG C-90 DEG C 1.5h-2.5h, after having reacted at 90 DEG C-100 DEG C ripening 0.5h-2.5h, obtain product；
4) described product is cooled down, wash, finally by methanol or soak with ethanol after shredding Dry, pulverize at 65 DEG C～75 DEG C, cross 60 mesh～100 mesh sieves, obtain adsorbent B LPAS.
Described adsorbent B LPAS is the adsorbent after a kind of improvement, and it eliminates original two Plant main component chitosan and maleic anhydride, introduce a kind of new composition 2-acrylamide-2-first After base propane sulfonic acid, not only there is relatively low cost, and there is more preferable adsorption effect, And character is more stable.
Compared with prior art, the advantage of the present invention is as follows:
1, the preparation of composite adsorption resin of the present invention makes uncharged amide groups in BLPAS structure Hydrolysis generates electronegative carboxylic acid sodio, makes sulfonic group be changed into sodium sulfonate group, coordinate chelating with The ratio of ion-exchange group, increases lignin three-dimensional space network repulsion, improves water absorption and swelling Performance, enables absorbent interior a large amount of activated adoption group to participate in heavy metal ion adsorbed, aobvious Write the absorption property improving heavy metal ion.
2, composite adsorption resin of the present invention is preferable to hybrid piles adsorption effect, 2.0mmol/L binary Pb (NO3)2/Cu(NO3)2To Pb in solution2+、Cu2+Adsorbance is respectively 1.225,1.047mmol/g, Pb2+To Cu2+Selective absorption coefficient be 2.623.
3, composite adsorption resin-made of the present invention is standby simple, easy to operate, the highest to equipment requirements, Easily industrialized production.
Accompanying drawing explanation
Fig. 1 is the XPS wide range comparison diagram of BLPAS Yu BLPAS-S.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described further.
The preparation of described adsorbent B LPAS:
Embodiment 1
Weigh 4.156g sodium lignin sulfonate and 11.083g acrylamide is dissolved separately in 30mL distillation In water.Acrylamide solution is sequentially added into 22.167g 2-acrylamide-2-methyl propane sulfonic, 1g bentonite, 0.0582g N, N '-methylene-bisacrylamide, stirring, mix homogeneously obtain A liquid.Being joined by A liquid in lignin sulfonic acid sodium solution, regulation pH value of solution is 4.0, then Add 0.116g potassium peroxydisulfate, seal, 65 DEG C, 75 DEG C, after 85 DEG C of each reaction 2h, 95 DEG C Ripening 0.5h, cooling, use methanol washing by soaking after shredding, dry in 65-75 DEG C of vacuum drying oven Dry, pulverize, cross 60-100 mesh sieve and obtain bentonite/sodium lignin sulfonate g acrylamide 2- Acrylamide-2-methyl propane sulfonic composite adsorption resin (BLPAS).Under room temperature, BLPAS exists Binary Pb (the NO of 100mL, 2.0mmol/L3)2/Cu(NO3)2To Pb in solution2+、Cu2+ Adsorbance is respectively 0.593,0.604mmol/g, Pb2+To Cu2+Selective absorption coefficient be 1.265。
Embodiment 2
Operational approach is with embodiment 1.
Preparation condition is m (sodium lignin sulfonate): m (total monomer)=1.5:10, m (acrylamide): m (2- Acrylamide-2-methyl propane sulfonic)=2:2, m (potassium peroxydisulfate)=0.40%, m (N, N '-methylene Base bisacrylamide)=0.15%, pH=2.0 time, gained composite adsorption resin B LPAS exists Binary Pb (NO3)2/Cu(NO3)2To Pb in solution2+、Cu2+Adsorbance is respectively 0.570, 0.487mmol/g, Pb2+To Cu2+Selective absorption coefficient be 1.355.:
Embodiment 3
Operational approach is with embodiment 1.
Preparation condition is m (sodium lignin sulfonate): m (total monomer)=1.25:10, m (acrylamide): m (2- Acrylamide-2-methyl propane sulfonic)=2.5:2, m (potassium peroxydisulfate)=0.35%, m (N, N '-sub- Bisacrylamide)=0.18%, pH=1.0 time, gained composite adsorption resin B LPAS At binary Pb (NO3)2/Cu(NO3)2To Pb in solution2+、Cu2+Adsorbance is respectively 0.558, 0.496mmol/g, Pb2+To Cu2+Selective absorption coefficient be 1.342.
Embodiment 4:
Operational approach is with embodiment 1.
Preparation condition is m (sodium lignin sulfonate): m (total monomer)=1.25:10, m (acrylamide): m (2- Acrylamide-2-methyl propane sulfonic)=1:2, m (potassium peroxydisulfate)=0.35%, m (N, N '-methylene Base bisacrylamide)=0.18%, pH=2.5 time, gained composite adsorption resin B LPAS exists Binary Pb (NO3)2/Cu(NO3)2To Pb in solution2+、Cu2+Adsorbance is respectively 0.544, 0.467mmol/g, Pb2+To Cu2+Selective absorption coefficient be 1.287.
Embodiment 5
Operational approach is with embodiment 1.
Preparation condition is m (sodium lignin sulfonate): m (total monomer)=1.5:10, m (acryloyl Amine): m (2-acrylamide-2-methyl propane sulfonic)=2.8:2, m (potassium peroxydisulfate)=0.40%, m (N, N '-methylene-bisacrylamide)=0.20%, pH=3.0 time, gained composite adsorption resin BLPAS is at binary Pb (NO3)2/Cu(NO3)2To Pb in solution2+、Cu2+Adsorbance is respectively 0.375,0.363mmol/g, Pb2+To Cu2+Selective absorption coefficient be 1.084.
The preparation of composite adsorption resin B LPAS-S:
Embodiment 6
First configure the sodium hydroxide solution of 200mL 1.85mol/L, then take 5g BLPAS and put In above-mentioned sodium hydroxide solution, 30 DEG C are soaked 2.0h, are then heated in constant temperature water bath 80 ± 2 DEG C of DEG C of reaction 1.75h, are filtrated to get product, use a large amount of distilled water flushing, until Washing effluent is neutrality；Product dry, pulverize at 75 DEG C ± 2 DEG C, crosses 60-100 Mesh sieve obtains reaction wood quality basic weight metal ion adsorbent BLPAS-S.That is: reaction condition is: Naoh concentration 1.85mol/L, reaction temperature 80 DEG C, response time 1.75h.Gained BLPAS-S is at 2.0mmol/L binary Pb (NO3)2/Cu(NO3)2To Pb in solution2+、Cu2+ Adsorbance is respectively 1.225,1.047mmol/g, Pb2+To Cu2+Selective absorption coefficient be 2.623。
Under identical adsorption conditions, before reaction, BLPAS is to Pb2+、Cu2+Adsorbance is respectively 0.593,0.604mmol/g, Pb2+To Cu2+Selective absorption coefficient be 1.265.Reaction It is respectively increased 2.07,1.73,2.07 times afterwards than before reaction.
The elementary analysis of table 1 BLPAS Yu BLPAS-S
After reaction, N1s track absworption peak significantly reduces as shown in Figure 1, and Na1s absworption peak shows Write and strengthen, illustrate that amide groups hydrolysis generates carboxylic acid sodium；As shown in Table 1, N is compared after reaction Constituent content reduces by 5.78% so that adsorption group-CONH in BLPAS-S2、-COONa、 -SO3The ratio of Na is approximately 1:1:1；BLPAS-S swelling ratio in distilled water after reaction For 244.95g/g, it is 127.29g/g before reaction；Illustrate that this processing method significantly improves adsorbent The swelling behavior of BLPAS, enables a large amount of adsorption group of absorbent interior to participate in an absorption huge sum of money Belong to ion, improve the absorption property of adsorbent.
Embodiment 7
Operational approach is substantially with embodiment 1, but operating condition change is as follows:
Soaking conditions is: soak time 1.5h, soaking temperature 35 DEG C；
Reaction condition is: naoh concentration 1.25mol/L, reaction temperature 100 DEG C, response time 0.5h；
Drying condition is: 70 DEG C ± 2 DEG C；
Gained BLPAS-S is at 2.0mmol/L binary Pb (NO3)2/Cu(NO3)2To Pb in solution2+、 Cu2+Adsorbance is respectively 1.516,1.691mmol/g, Pb2+To Cu2+Selective absorption system Number is 1.527.
Embodiment 8
Soaking conditions is: soak time 2.0h, soaking temperature 35 DEG C；
Reaction condition is: naoh concentration 0.5mol/L, reaction temperature 90 DEG C, response time 0.5h； Drying condition is: 65 DEG C ± 2 DEG C；
Gained BLPAS-S is at 2.0mmol/L binary Pb (NO3)2/Cu(NO3)2To Pb in solution2+、 Cu2+Adsorbance is respectively 1.231,1.040mmol/g, Pb2+To Cu2+Selective absorption system Number is 2.227.
Embodiment 9
Operational approach is with embodiment 1.
Soaking conditions is: soak time 1.0h, soaking temperature 40 DEG C；
Reaction condition is: naoh concentration 1.25mol/L, reaction temperature 100 DEG C, response time 2.0h；
Drying condition is: 75 DEG C ± 2 DEG C；
Gained BLPAS-S is at 2.0mmol/L binary Pb (NO3)2/Cu(NO3)2To Pb in solution2+、 Cu2+Adsorbance is respectively 1.069,0.677mmol/g, Pb2+To Cu2+Selective absorption system Number is 3.235.
Embodiment 10
Operational approach is with embodiment 1.
Soaking conditions is: soak time 1.5h, soaking temperature 40 DEG C；
Reaction condition is: naoh concentration 1.25mol/L, reaction temperature 70 DEG C, response time 0.5h； Drying condition is: 75 DEG C ± 2 DEG C；
Gained BLPAS-S is at 2.0mmol/L binary Pb (NO3)2/Cu(NO3)2In solution right Pb2+、Cu2+Adsorbance is respectively 1.109,0.781mmol/g, Pb2+To Cu2+Selectivity Adsorption coefficient is 2.877.

Claims (3)

1. a composite adsorption resin, is characterized in that, with adsorbent B LPAS as raw material, by raw material Carry out following process to prepare:
(1) taking 5g adsorbent B LPAS and being placed in 150-250mL concentration is 0.5-2.0mol/L Sodium hydroxide solution at 10 DEG C～40 DEG C soak 1-3 hour, obtain mixing soak；
(2) then described mixing soak is heated to 70-100 DEG C of reaction 0.5-2.0h, filters Obtain product, with distilled water flushing, until washing effluent is neutrality；
(3) described product be dry, pulverize at 65 DEG C～75 DEG C, cross 60-100 mesh Sieve obtains composite adsorption resin；
Wherein, described adsorbent B LPAS is according to acrylamide and 2-acrylamide-2-methyl propane sulfonic Calculating for total monomer, formula and content thereof is: acrylamide and 2-acrylamide-2-methyl-prop The mass ratio of sulfonic acid is (1-2.8) 2,
Sodium lignin sulfonate is (0.5-2.0) 10 with the mass ratio of total monomer,
The mass content of potassium peroxydisulfate is the 0.2%-0.5% of total monomer quality,
N, N ' 0.1%-0.25% that mass content is total monomer quality of-methylene-bisacrylamide,
Bentonitic mass content is the 2%-4% of total monomer quality.
The most according to claim 1, composite adsorption resin, is characterized in that, described adsorbent B LPAS It is that total monomer calculates according to acrylamide and 2-acrylamide-2-methyl propane sulfonic, preferential formula And content is:
Acrylamide is (1-2) 2 with the mass ratio of 2-acrylamide-2-methyl propane sulfonic,
Sodium lignin sulfonate is (0.5-1.0) 10 with the mass ratio of total monomer,
The mass content of potassium peroxydisulfate is the 0.25%-0.45% of total monomer quality,
N, N ' 0.15%-0.25% that mass content is total monomer quality of-methylene-bisacrylamide,
Bentonitic mass content is the 3% of total monomer quality.
Composite adsorption resin the most according to claim 1 or claim 2, is characterized in that, described adsorbent BLPAS is prepared by following methods:
1) weigh by above-mentioned formula that quantitative sodium lignin sulfonate is molten and acrylamide is dissolved separately in steaming In distilled water, obtain lignin sulfonic acid sodium water solution and acrylamide aqueous solution respectively；
2) in acrylamide aqueous solution, 2-acrylamide-2-methyl propane sulfonic, swelling it are sequentially added into Soil, N, N '-methylene-bisacrylamide, stirring, mix homogeneously, obtain solution A；
3) then solution A being joined in lignin sulfonic acid sodium water solution, regulation pH is 2.5, then Add potassium peroxydisulfate, seal, at 60 DEG C-65 DEG C, react 1.5h-2.5h, then at 70 DEG C React 1.5h-2.5h at-80 DEG C, at 85 DEG C-90 DEG C, then react 1.5h-2.5h, reaction After complete at 90 DEG C-100 DEG C ripening 0.5h-2.5h, obtain product；
4) described product is cooled down, washs by methanol or soak with ethanol after shredding, finally in Dry, pulverize at 65 DEG C～75 DEG C, cross 60 mesh～100 mesh sieves, obtain adsorbent B LPAS.
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