CN102641724A - Method for preparing efficient adsorbent from raw mineral materials containing organic mattes through carbonization - Google Patents
Method for preparing efficient adsorbent from raw mineral materials containing organic mattes through carbonization Download PDFInfo
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Abstract
The invention relates to a method for preparing adsorbent from oil shale residues or high-ignition-loss diatomaceous earth through carbonization. The method comprises the following steps of: smashing the oil shale residues or the diatomaceous earth with high content of organic matters, adding additives and mineral powder and then uniformly mixing and grinding the smashed oil shale residues or the smashed diatomaceous earth; performing vibration or extrusion forming on the mixture after mixing the obtained mixture with water, and performing thermal treatment on the formed mixture under the atmosphere of oxygen deficiency or nitrogen, thereby obtaining the efficient adsorbent containing the carbon silicate matters. According to the adsorbent prepared from the carbonized oil shale residues and the carbonized diatomaceous earth disclosed by the invention, the organic matters in the adsorbent are utilized effectively, the carbon emission is reduced, the wastes are turned into wealth, the prepared adsorbent has the advantages of being strong in adsorbability, good in water tolerance, high in intensity, free from pollution and low in cost, the production process is simple, and the adsorbent can be loaded with ions having various functions to serve as a catalyst carrier.
Description
Technical field:
The present invention relates to a kind of inorganic non-metallic adsorbent, the adsorbent method that especially prepares with organic natural minerals raw material of association and industrial residue.
Background technology:
Sorbing material is the one type of material that in industrial and agricultural production and people's daily life, often uses; Because sorbing material is easy to use; Cheap, use and extensively, the aspect is increasing is employed in grease, pharmacy, preparation, catalyst carrier, fine chemistry industry and the depollution of environment etc.Sorbing material is of a great variety, as adopted all kinds of micropores, the mesoporous zeolite of chemical synthesis process preparation by chemical reagent; Adopt traditional potting porcelain technology, utilize the porous with adsorption filtration function, the ceramic honey comb of cheap natural material preparation; Adopt natural porous mass diatomite, natural zeolite, clay, through simply processing directly as sorbing material such as filter aid, adsorbent etc.; Adopt organic and inorganic carbonaceous material to prepare active carbon or the like through carbonization treatment.Adopt the sorbing material price of chemical synthesis process preparation higher, the preparation method is complicated, and the sewage of often following that has produces; Its performance of adsorbent that adopts natural minerals to obtain through simple processing is difficult to satisfy the requirement than high adsorption capacity; Adopt the activated carbon of organic matter preparation need consume a large amount of organic matters, the intensity of product is lower, loses efficacy easily, is prone to cause secondary pollution.
Oil shale waste is meant oil shale remaining residue after extracting organic light component wherein, and wherein the main body composition is an inorganic mineral, like clay, feldspar, quartz etc., and follows remaining organic matter, and content of organics is approximately 5%-30%; Diatomite is that the Diatomeae remains of growing in ocean or the lake are at subaqueous deposit; The biogenesis silicastone that forms through the natural environment effect and gradually; Its essential mineral composition is the amorphous state opal; But the plant and animal residues that contains different amounts simultaneously is organic, and the content of organic matter reaches about 6%-25%.The common trait of above-mentioned two kinds of natural materials is to be the main body with the inorganic silicate mineral, and contains the organic matter of different amounts, and the kind of inorganic mineral and content of organics often depend on the place of production.
At present,, storing up and taken a large amount of soils, and soil, water body are caused serious negative effect as the energy minerals mine tailings for oil shale waste, is to realize the utilization of resources, reduces environmental pollution, and researchers have carried out various utilizations researchs to it.As oil shale waste being made building block, haydite or the like, the inorganic mineral characteristics that existing achievement is primarily aimed at have wherein carried out utilizing research.
Diatomite is owing to the porous mass of nature, and in field extensive uses such as light building material, filter aids, the component of its utilization also is a cellular amorphous silicon di-oxide wherein, seldom relates to wherein organic utilization.In the past in processing and utilization above-mentioned raw materials process for removing organic component, all be employed in calcining method in the air, processing procedure is discharged great amount of carbon dioxide, and has caused the wasting of resources, considers report that organic matter is wherein utilized and rare.
The method of CN1280879 open " preparing active carbon-zeolite composition " by gangue.This method is that primary raw material adopts the sial component in the alkali activation processing gangue with the gangue, again through the synthetic silicagel-active carbon compound adsorbent of preparing.After this adsorbent prepares process and comprises the high concentration alkali active coal gangue, again through acidifying, become glue, aging, steps such as washing make.
CN1583243 discloses the method for " preparing active carbon-zeolite composition by gangue ", is high temperature alkali fuse active coal gangue under nitrogen protection, and steps such as water is aging, hydrothermal crystallizing make through adding again.This method has been accomplished the making full use of of three kinds of compositions of sial carbon in the feed coal spoil; The degree of crystallinity of gained compound mesolite is very high; This compound has the oil-wet behavior of the hydrophilic and active carbon of zeolite concurrently simultaneously, can be used as adsorbent, deodorant, release agent etc.; In environmental protection, future is widely used in daily life and the industrial and agricultural production.
CN1583243 discloses " difunctional sorbing material of active carbon/zeolite and preparation method "; This method is characterized in that feed coal spoil, alkali and water three even through mixing, and is compressed to sheet, column or spherical type body, and the type body is the high temperature alkali fuse activation under nitrogen protection; Again through aging; Hydrothermal crystallizing, washing, drying and other steps is prepared the difunctional sorbing material of active carbon/zeolite.Product can be widely used in catalyst, adsorbent, water purification agent and exhaust-gas treatment etc.
Above-mentioned three kinds of methods all are primary raw material with the gangue; Under the high concentration strong alkaline condition; Preparing the zeolite with absorption property through the chemical synthesis process is main target; Organic matter changes into carbon and synthetic zeolite coexistence in its spoil in alkali activation, chemical synthesis and pyroprocess, in this material, only helps out.
CN101632916 discloses " a kind of bamboo carbon composite adsorbent and preparation method thereof ".This method comprises: with 20 parts-90 parts of bamboo charcoal powder, 1 part-50 parts in anion mineral powder, 2 parts-25 parts of diatomites in powder, 5 parts-30 parts of binding agents; After high-temperature calcination is handled; Can obtain that intensity height, hardness are high, chemical stability is good; And water insoluble, can purify in absorption and the air cleaning absorption at water and use.
CN1864851 discloses " preparation method of modified composite absorption agent of diatomite ".This method comprises at first puts into the strong base solution that concentration is 1～6mol/L with diatomite, under 30～90 ℃ temperature, soaks 1～4h; Wash, filter diatomite dried then; Again above-mentioned diatomite is put into pH and is 1～4, concentration is the solution of magnesium salts, trivalent iron salt or the manganese salt of 0.5～3mol/L, soaks 5～12h, the pH value that remains solution in the immersion process is less than 7; Filter the diatomite taking-up dried afterwards; Diatomite after will handling is again put into the alkaline precipitating agent that concentration is 0.5～6mol/L, soaks 5～12h; Wash successively afterwards, filtration, ageing, drying or roasting, pulverising step, prepare modified composite absorption agent of diatomite.
It is raw material that these two kinds of methods have all adopted diatomite, utilization be the opaline absorption property of original porous in the diatomite, just in additional other functions and moulding, handle, do not consider wherein organic utilization.
CN101747541A discloses " method for carbonizing and modifying kieselguhr powder surface ".To contain organic diatomite in powder and be broken to＜200 orders, put into the calcining of high temperature furnace secluding air, insulation, process carbonization diatomite with the stove cooling; Utilize the nonpolar kieselguhr powder surface performance of improving of diatomite surface carbon, make it have the effect with high-molecular organic material very compatible property, for the diatomite surface modification provides new thinking.
What this method was utilized the preparation of organic matter in the diatomite is the kieselguhr powder surface that amorphous carbon coats, and be used for its surface modification, and under this preparation condition, the absorption property of carbon is limited.
Also do not see at present the report that has organic natural mineral raw oil shale waste of high-load and high loss on ignition diatomite to prepare adsorbent.
Summary of the invention:
The object of the invention just is the deficiency to above-mentioned prior art, provides a kind of pin carbonization treatment to contain the method that organic raw mineral materials prepares high-efficiency adsorbent
The objective of the invention is to realize through following technical scheme:
Carbonization treatment contains the method that organic raw mineral materials prepares high-efficiency adsorbent, is with discarded oil shale waste or the organic carbon utilization in the low-grade high loss on ignition diatomite, may further comprise the steps:
A, oil shale waste or high loss on ignition diatomite in powder are broken to less than 100 orders;
B, account for the 90wt%-100wt% of material gross mass by the mass fraction oil shale waste; Additive accounts for the 0-10wt% of material gross mass or the 85wt%-100wt% that high loss on ignition diatomite accounts for the material gross mass; Additive accounts for material gross mass 0wt%-5wt% and mineral powder 0wt%-10wt%, and mixed grinding is even;
C, the material that will add oil shale waste or high loss on ignition diatomite and mineral powder behind the additive are pressed mass fraction and are added 20-40wt% water, mixed-forming, preparation moulding in dry 4-8 hour under 70-90 ℃ of condition;
D, with the oil shale waste material or the high loss on ignition diatomite material of drying and moulding; In anoxic or nitrogen protection atmosphere, heat-treat; 200-350 ℃ of roasting, be incubated 0.5-1 hour earlier, be warming up to 600-1200 ℃ of roasting then; Be incubated 1-4 hour, cool to normal temperature afterwards with the furnace and come out of the stove and be high-efficiency adsorbent.
The described oil shale waste or the diatomaceous content of organic matter of high loss on ignition are higher than 5wt%.
Described additive is selected from one or both in silicate glass powder, Paris white, sodium carbonate or the dolomite dust.
Described mineral powder is selected from one or both in feldspar powder, gangue, kaolin powder or the bentonite in powder.
The described moulding of step c is the graininess that obtains through vibratory drilling method, spherical, or extrusion obtains column, sheet.
Beneficial effect: the present invention adopts carbonization method to prepare oil shale waste and diatomite adsorbant; Through adding additive and mineral powder; The new adsorbent that make that carbon is uniformly dispersed, adsorptivity is strong, water-tolerant, surface can compound various function ingredients, its absorption property is superior to high-grade diatomite and active carbon.These adsorbent raw material are cheap and easy to get, and production technology is simple, and is easy to use, for the utilization of low-grade diatomite and oil shale waste provides new approach.Directly utilize the organic diatomite of oil shale waste and high-load to prepare high-efficiency adsorbent; Not only effectively utilized organic matter wherein; Reduce carbon emission, turn waste into wealth, prepared product has that adsorptivity is strong, usefulness stable, intensity is high, preparation technology is simple, non-environmental-pollution, with low cost; Be easy to apply, and expanded oil shale waste and the low-grade diatomaceous space that utilizes of high loss on ignition.
Description of drawings:
Fig. 1 active carbon and carbonization diatomite adsorption effect comparison diagram
A is an active carbon, and b is the active carbon through activation processing, and c is a carbonization diatomite
The specific embodiment:
Oil shale waste and high loss on ignition diatomite prepare the method for adsorbent, may further comprise the steps:
1, the method for preparing adsorbent with oil shale waste may further comprise the steps:
A, oil shale waste is crushed to less than 100 orders, according to mass fraction oil shale waste 90wt%-100wt%, adds one or both 0-10wt% in silicate glass powder, Paris white, sodium carbonate or the dolomite dust of additive, mixed grinding is even;
B, will add oil shale waste behind the additive and press mass fraction and add 20-40wt% water, mixed-forming;
C, preparation moulding in dry 4-8 hour under 70-90 ℃ of condition;
D, the graininess oil shale waste with drying and moulding, column oil shale waste or sheet oil shale waste material are heat-treated in anoxic or nitrogen protection atmosphere; Earlier 200-350 ℃ of roasting; Be incubated 0.5-1 hour; Be warming up to 600-1200 ℃ of roasting then, be incubated 1-4 hour, cool to normal temperature afterwards with the furnace and come out of the stove and be the oil shale waste high-efficiency adsorbent.
2, the method for preparing adsorbent with high loss on ignition diatomite may further comprise the steps:
A, diatomite in powder is broken to less than 100 orders; Press the high loss on ignition diatomite of mass fraction 85wt%-100wt%; Adding is as silicate glass powder, Paris white, sodium carbonate or the dolomite 0wt%-5wt% of additive agent and one or both 0wt%-10wt% in mineral powder gangue, feldspar powder, kaolin powder or the bentonite in powder, and mixed grinding is even;
B, the powder of above-mentioned mixing is pressed mass fraction add 20%-40wt% water, mixed-forming;
C, preparation moulding in dry 4-6 hour under 70 ℃ of-90 ℃ of conditions;
D, with the graininess diatom of drying and moulding soil, column diatomite or sheet diatomite material sintering in anoxic or nitrogen atmosphere; Earlier at 200 ℃-350 ℃; Be incubated 0.5-1 hour, be warming up to 600 ℃-1200 ℃ then, be incubated 1-4 hour; Cool to normal temperature afterwards with the furnace, be the carbonization diatomite adsorbant;
Embodiment 1
Loss on ignition reached 21% diatomite 92g and be crushed to less than 100 orders, pressing mass fraction, to add silicate glass powder, the kaolinite powder of 5g, the 2g feldspar powder mixed grinding of 1g even; The powder that mixes is added 25wt% water by mass fraction, and mixing vibration becomes graininess, and drying is 2 hours under 90 ℃ of conditions; Diatomite carbonization treatment in airtight high temperature furnace with granulated dried is heated to 350 ℃ earlier, is incubated 1 hour, is heated to 800 ℃ then, is incubated 4 hours, cools to normal temperature afterwards with the furnace, is diatomite adsorbant.Carbon content is about 3% in this adsorbent.
Get adsorbent according to the 1wt% ratio of liquid quality and join (methyl orange solution concentration is 20 mg/litre) in the methyl orange solution; Stirred at normal temperatures 40 minutes; Get solution after static, adopt the absorbance of absorbance method test methyl orange solution, calculate clearance with respect to liquid before the absorption and reach 100%.Calcined diatomite sample, activated carbon powder carry out comparing experiment under the same terms in the air of quality such as other gets, and the methyl orange clearance that records calcined diatomite sample in the air is 40%, and active carbon methyl orange clearance is 97%.The diatomite that the diatomaceous adsorption effect of carbonization is superior to calcining in the air is described, and is superior to activated carbon.
Embodiment 2
Loss on ignition reached 15% diatomite 85g and be crushed to, press that mass fraction adds 5g silicate glass powder, 10g bentonite in powder mixed grinding is even less than 100 orders; The powder that mixes is sprayed into 25wt% water by the mass fraction adding, extrusion modling column diatomite, drying is 2 hours under 90 ℃ of conditions; Diatomite carbonization treatment in airtight high temperature furnace that column is dry is heated to 300 ℃ earlier, is incubated 1 hour, is heated to 900 ℃ then, is incubated 4 hours, cools to normal temperature afterwards with the furnace, is diatomite adsorbant.Carbon content is for being about 1.8% in this adsorbent.
Get adsorbent according to the 1wt% ratio of liquid quality and join (methylene blue solution concentration is 20 mg/litre) in the methylene blue solution, stirred at normal temperatures 40 minutes, the clearance of getting the solution testing methylene blue after static reaches 100%.The activated carbon of quality such as other gets is tested equally, and recording the methylene blue clearance is 98%.Explain that the diatomaceous adsorption effect of carbonization is superior to active carbon.
Embodiment 3
Loss on ignition reached 8% diatomite 90g and be crushed to, press that mass fraction adds 2g silicate glass powder, 8g colliery powder mixed grinding is even less than 100 orders; The powder that mixes is sprayed into 25wt% water by the mass fraction adding, extrusion modling sheet diatomite, drying is 2 hours under 90 ℃ of conditions; Diatomite carbonization treatment in airtight high temperature furnace that sheet is dry is heated to 300 ℃ earlier, is incubated 1 hour, is heated to 900 ℃ then, is incubated 4 hours, cools to normal temperature afterwards with the furnace, is diatomite adsorbant.Carbon content is for being about 1.8% in this adsorbent.
Get adsorbent according to the 1wt% ratio of liquid quality and join (methylene blue solution concentration is 20 mg/litre) in the methylene blue solution, stirred at normal temperatures 40 minutes, the clearance of getting the solution testing methylene blue after static reaches 100%.The activated carbon of quality such as other gets is tested equally, and recording the methylene blue clearance is 96%.
Embodiment 4
The content of organic matter reached 26% oil shale waste 95g pulverizing to less than 100 orders; Mix by powder quality mark adding 3wt calcium carbonate, 2wt% sodium carbonate; Spray 20wt% water according to mass fraction, mix and shake into graininess, drying is 2 hours under 90 ℃ of conditions; Oil shale waste carbonization treatment in airtight high temperature furnace with granulated dried is heated to 350 ℃ earlier, is incubated 1 hour, is heated to 800 ℃ then, is incubated 4 hours, cools to normal temperature afterwards with the furnace, is carbonized oil shale slag adsorbent.Carbon content is about 3.5% in this adsorbent.
Get adsorbent according to 1% ratio of liquid quality and join (methyl orange solution concentration is 20 mg/litre) in the methyl orange solution, stirred at normal temperatures 40 minutes, get solution testing methyl orange clearance after static and reach 90%.The activated carbon of quality such as other gets is tested equally, and recording the methyl orange clearance is 97%.Though the adsorption effect of carbonization oil shale waste is worse than active carbon slightly, carbon content wherein is merely one of about 1/30 of activated carbon.
Embodiment 5
The content of organic matter reached 14% oil shale waste 90g pulverizing to less than 100 orders, add 4g silicate glass powder and 6g dolomite dust by the powder quality mark, spray into 20wt% water, extrusion becomes column, drying is 2 hours under 90 ℃ of conditions; Oil shale waste carbonization treatment in airtight high temperature furnace that column is dry is heated to 350 ℃ earlier, is incubated 1 hour, is heated to 900 ℃ then, is incubated 4 hours, cools to normal temperature afterwards with the furnace, is carbonized oil shale slag adsorbent.Carbon content is about 2.0% in this adsorbent.
Get adsorbent according to 1% ratio of liquid quality and join (methylene blue solution concentration is 20 mg/litre) in the methylene blue solution, stirred at normal temperatures 40 minutes, get solution testing methylene blue clearance after static and reach 100%.The activated carbon of quality such as other gets is tested equally, and recording the methylene blue clearance is 98%.Absorption property is superior to activated carbon.
Embodiment 6
Loss on ignition reached 15% diatomite 100g and be crushed to, under the secluding air condition, be heated to 900 ℃, be incubated 2 hours, cool to normal temperature afterwards with the furnace, be diatomite adsorbant less than 100 orders.Carbon content is for being about 2% in this adsorbent.
Get adsorbent according to the 0.5wt% ratio of liquid quality and join (methylene blue solution concentration is 20 mg/litre) in the methylene blue solution, stirred at normal temperatures 40 minutes, the clearance of getting the solution testing methylene blue after static reaches 100%.The activated carbon of quality such as other gets is tested equally, and recording the methylene blue clearance is 92%.Explain that the diatomaceous adsorption effect of carbonization is superior to active carbon.
Embodiment 7
The content of organic matter reached 14% oil shale waste 90g pulverizing to less than 100 orders, under 90 ℃ of conditions dry 2 hours; Oil shale waste is heated to 800 ℃ in airtight high temperature furnace, is incubated 2 hours, cool to normal temperature afterwards with the furnace, be carbonized oil shale slag adsorbent.Carbon content is about 2.4% in this adsorbent.
Get adsorbent according to 0.5% ratio of liquid quality and join (methylene blue solution concentration is 20 mg/litre) in the methylene blue solution, stirred at normal temperatures 40 minutes, get solution testing methylene blue clearance after static and reach 96%.The activated carbon of quality such as other gets is tested equally, and recording the methylene blue clearance is 92%.Absorption property is superior to activated carbon.
Claims (5)
1. a carbonization treatment contains the method that organic raw mineral materials prepares high-efficiency adsorbent, it is characterized in that, with discarded oil shale waste or the organic carbon utilization in the low-grade high loss on ignition diatomite, may further comprise the steps:
A, oil shale waste or high loss on ignition diatomite in powder are broken to less than 100 orders;
B, press mass fraction oil shale waste 90wt%-100wt%, additive 0-10wt% mixed grinding is even, or high loss on ignition diatomite 85wt%-100wt%, additive 0wt%-5wt% and mineral powder 0wt%-10wt%, and mixed grinding is even;
C, the material that will add oil shale waste or high loss on ignition diatomite and mineral powder behind the additive are pressed mass fraction and are added 20-40wt% water, mixed-forming, preparation moulding in dry 4-8 hour under 70-90 ℃ of condition;
D, with the oil shale waste material or the high loss on ignition diatomite material of drying and moulding; In anoxic or nitrogen protection atmosphere, heat-treat; 200-350 ℃ of roasting, be incubated 0.5-1 hour earlier, be warming up to 600-1200 ℃ of roasting then; Be incubated 1-4 hour, cool to normal temperature afterwards with the furnace and come out of the stove and be high-efficiency adsorbent.
2. contain the method that organic raw mineral materials prepares high-efficiency adsorbent according to the described carbonization treatment of claim 2, it is characterized in that, the described oil shale waste or the diatomaceous content of organic matter of high loss on ignition are higher than 5wt%.
3. contain the method that organic raw mineral materials prepares high-efficiency adsorbent according to the described carbonization treatment of claim 1, it is characterized in that, described additive is selected from one or both in silicate glass powder, Paris white, sodium carbonate or the dolomite dust.
4. contain the method that organic raw mineral materials prepares high-efficiency adsorbent according to the described carbonization treatment of claim 1, it is characterized in that, described mineral powder is selected from one or both in feldspar powder, gangue, kaolin powder or the bentonite in powder.
5. contain the method that organic raw mineral materials prepares high-efficiency adsorbent according to the described carbonization treatment of claim 1, it is characterized in that, the described moulding of step c is the graininess that obtains through vibratory drilling method, spherical, or extrusion obtains column, sheet.
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| CN103055811A (en) * | 2012-12-31 | 2013-04-24 | 中国科学院兰州化学物理研究所盱眙凹土应用技术研发中心 | Method for preparing palm oil decolorizing agent by attapulgite clay soybean oil decolorized waste residues |
| CN105107456A (en) * | 2015-09-27 | 2015-12-02 | 黑龙江科技大学 | Method of using white mud and oil shale ash as raw materials to prepare compound adsorbent |
| CN105214604A (en) * | 2015-09-21 | 2016-01-06 | 韩方超 | A kind of preparation method of high adsorption diatomaceous shale material |
| CN106955660A (en) * | 2017-05-17 | 2017-07-18 | 宁波诺丁汉新材料研究院有限公司 | The preparation method and gasification process of gasification process heavy metal absorbent |
| CN107833754A (en) * | 2017-11-01 | 2018-03-23 | 吉林大学 | The method that the quick battery light anode material of diatom opal making dye is lost using high fever |
| CN108448077A (en) * | 2018-02-09 | 2018-08-24 | 武汉科技大学 | A method of preparing Si/C composite materials by raw material of oil shale residues |
| CN109054257A (en) * | 2018-09-25 | 2018-12-21 | 蚌埠创特新材料科技有限公司 | A kind of PVC Masterbatch with excellent weather resistance |
| CN109306138A (en) * | 2018-09-25 | 2019-02-05 | 蚌埠创特新材料科技有限公司 | A kind of polyvinyl chloride resin of high color stability |
| CN113731364A (en) * | 2021-09-17 | 2021-12-03 | 苏州中材非金属矿工业设计研究院有限公司 | Black talc adsorbent and preparation method and application thereof |
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| CN103055811A (en) * | 2012-12-31 | 2013-04-24 | 中国科学院兰州化学物理研究所盱眙凹土应用技术研发中心 | Method for preparing palm oil decolorizing agent by attapulgite clay soybean oil decolorized waste residues |
| CN105214604A (en) * | 2015-09-21 | 2016-01-06 | 韩方超 | A kind of preparation method of high adsorption diatomaceous shale material |
| CN105214604B (en) * | 2015-09-21 | 2018-02-16 | 潍坊泥博士新型材料有限公司 | A kind of preparation method of high adsorption diatomaceous shale material |
| CN105107456A (en) * | 2015-09-27 | 2015-12-02 | 黑龙江科技大学 | Method of using white mud and oil shale ash as raw materials to prepare compound adsorbent |
| CN106955660A (en) * | 2017-05-17 | 2017-07-18 | 宁波诺丁汉新材料研究院有限公司 | The preparation method and gasification process of gasification process heavy metal absorbent |
| CN107833754A (en) * | 2017-11-01 | 2018-03-23 | 吉林大学 | The method that the quick battery light anode material of diatom opal making dye is lost using high fever |
| CN108448077A (en) * | 2018-02-09 | 2018-08-24 | 武汉科技大学 | A method of preparing Si/C composite materials by raw material of oil shale residues |
| CN108448077B (en) * | 2018-02-09 | 2020-07-07 | 武汉科技大学 | Method for preparing Si/C composite material by using oil shale waste residues as raw materials |
| CN109054257A (en) * | 2018-09-25 | 2018-12-21 | 蚌埠创特新材料科技有限公司 | A kind of PVC Masterbatch with excellent weather resistance |
| CN109306138A (en) * | 2018-09-25 | 2019-02-05 | 蚌埠创特新材料科技有限公司 | A kind of polyvinyl chloride resin of high color stability |
| CN113731364A (en) * | 2021-09-17 | 2021-12-03 | 苏州中材非金属矿工业设计研究院有限公司 | Black talc adsorbent and preparation method and application thereof |
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Application publication date: 20120822 |