JP3840038B2 - Method for producing adsorptive ceramics - Google Patents
Method for producing adsorptive ceramics Download PDFInfo
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- JP3840038B2 JP3840038B2 JP2000152169A JP2000152169A JP3840038B2 JP 3840038 B2 JP3840038 B2 JP 3840038B2 JP 2000152169 A JP2000152169 A JP 2000152169A JP 2000152169 A JP2000152169 A JP 2000152169A JP 3840038 B2 JP3840038 B2 JP 3840038B2
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse ; Residues
- C04B33/135—Combustion residues, e.g. fly ash, incineration waste
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
- C04B35/62209—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse using woody material, remaining in the ceramic products
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
- C04B38/0635—Compounding ingredients
- C04B38/0645—Burnable, meltable, sublimable materials
- C04B38/067—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Combustion & Propulsion (AREA)
- Environmental & Geological Engineering (AREA)
- Dispersion Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Description
【０００１】
［発明の属する技術分野］
本発明は、吸着性セラミックスの製造方法に関するものである。
【０００２】
［従来の技術］
従来の吸着性セラミックスは、例えば特公平３−６３５７８号に示されているようにポリアミドイミド樹脂を熱硬化性有機バインダーに用いているが、無機質が充分でなく、再燃焼しても満足できる吸着性セラミックスは得られていない。
【０００３】
［発明が解決しようとする課題］
更に例えば特開平５−１３９８０９号公報にみられるように、酸化ジルコニウムや酸化アルミニウムを主原料にして焼成する方法が示されているが、これは原料コストが高い割に吸着力は落ちると言う欠点がある。
【０００４】
そこで、本発明は安価に製造が可能で、環境問題に適合した各種物質を効率良く吸着するセラミックスの製造方法を提供する事を目的とする。
【０００５】
[課題を解決するための手段] そこで、本発明者は、上記目的を達成するための手段の一つとして、杉の燃焼灰１００重量部に対し、酸化鉄を３５重量部、有機バインダーを３０重量部を加えて混練して乾燥せしめ、しかる後、焼成炉の中で７００〜９００℃の温度で１時間程の時間をかけて昇温させ、５〜８時間保持して、自然放冷させることによって、比表面積が７９ｍ２/g、細孔容積が0.9ml/gの多孔質セラミックスを得る方法を完成したのである。
【０００６】
本発明で針葉樹の燃焼灰を用いる理由は、木灰の粒子が微細で硬質で、吸着能力を高める効果があるからである。
【０００７】
金属酸化物としては酸化鉄が安価で結晶構造上からも吸着能力は優れているが、焼成後、表面が赤褐色に変色する事がある。その場合は焼成温度を下げるか、他の金属酸化物、チタン、マンガン，ニッケル、コバルトなどを用いる事ができる。
【０００８】
好ましい有機バインダーとしては、ポリビニルアルコール樹脂及び尿素樹脂が挙げられる。これらは各原料との混練が容易で焼成に関しても品質のむらが少ないという長所がある。
【０００９】
焼成温度は少なくとも７００℃以上が必要で、これ以下で焼成すると充分な吸着力が得られない。又、９００℃以上で焼成すると表面がガラス質になり易く、吸着性は著しく低下する。
【００１０】
本発明により得られた焼成体は淡黄色ないし淡褐色の多孔性のセラミックスで吸着性に優れている。本発明品を空気中で振動させるとマイナスイオンの発生が認められた。これは燃焼灰のセラミックスを多孔性により、空気中の水分を分解してヒドロキシルイオン（マイナスイオン）を発生するものと考えられる。
【００１１】
セラミックス供給体としての木灰は混合体中５０〜７０重量％が望ましく、５０重量％以下になると全体が脆くなり、７０重量％より多くなると吸着能力は減少する。
【００１２】
［発明の実施の形態］
実施例１
杉の燃焼灰１００重量部、酸化鉄３５重量部、ポリビニルアルコール樹脂３０重量部を混練し、乾燥させた後、焼成炉内で常温から８５０℃まで１時間かけて昇温する。この温度を５〜８時時間維持してから自然放冷する。淡褐色の吸着性セラミックスが得られる。
この吸着性セラミックスの物性は下記の通りである。
【００１３】
参考例
実施例２ヒノキの燃焼灰１００重量部、酸化マンガン３０重量部、尿素樹脂３０重量部を混練し、乾燥後、焼成炉内で常温から９００℃まで１時間かけて昇温する。この温度を６〜７時時間維持する。その後自然放冷すると、淡黒色の吸着性セラミックスが得られる。この物体の物性は下記の通りである。
【００１４】
［発明の効果］
本発明によってセラミックス性の優れた吸着性を持つ安価なものが得られた。また、マイナスイオン発生をも確認できた。
吸着力は市販活性炭より優れたものであった。[0001]
[Technical field to which the invention belongs]
The present invention relates to a method for producing adsorptive ceramics.
[0002]
[Conventional technology]
Conventional adsorptive ceramics use polyamide-imide resin as a thermosetting organic binder, as shown in, for example, Japanese Patent Publication No. 3-63578, but the adsorption is not sufficient and is satisfactory even after re-burning. Ceramics have not been obtained.
[0003]
[Problems to be solved by the invention]
Further, as shown in, for example, Japanese Patent Laid-Open No. 5-139809, there is shown a method of firing using zirconium oxide or aluminum oxide as a main raw material, but this has the disadvantage that the adsorptive power decreases for a high raw material cost. There is.
[0004]
Accordingly, an object of the present invention is to provide a method for producing a ceramic that can be produced at low cost and that efficiently adsorbs various substances suitable for environmental problems.
[0005]
[Means for Solving the Problems] Therefore, as one of means for achieving the above object, the present inventor has 35 parts by weight of iron oxide and 30 parts of organic binder with respect to 100 parts by weight of burned ash of cedar. Add parts by weight, knead and dry, then raise the temperature in a firing furnace at 700-900 ° C. over 1 hour, hold for 5-8 hours, let it cool naturally Thus, a method for obtaining a porous ceramic having a specific surface area of 79 m 2 / g and a pore volume of 0.9 ml / g was completed.
[0006]
The reason for using the coniferous combustion ash in the present invention is that the wood ash particles are fine and hard and have the effect of increasing the adsorption capacity.
[0007]
As a metal oxide, iron oxide is inexpensive and has an excellent adsorption ability in terms of crystal structure. However, the surface may change to reddish brown after firing. In that case, the firing temperature can be lowered, or other metal oxides such as titanium, manganese, nickel, and cobalt can be used.
[0008]
Preferred organic binders include polyvinyl alcohol resins and urea resins. These have the advantages that they can be easily kneaded with each raw material and have little quality unevenness in terms of firing.
[0009]
The calcining temperature needs to be at least 700 ° C., and if it is calcined below this temperature, sufficient adsorption power cannot be obtained. Moreover, when it bakes at 900 degreeC or more, the surface becomes glassy easily and adsorbability falls remarkably.
[0010]
The fired body obtained by the present invention is a pale yellow or light brown porous ceramic and is excellent in adsorptivity. Generation of negative ions was observed when the product of the present invention was vibrated in air. This is thought to be due to the fact that the combustion ash ceramics are porous, so that moisture in the air is decomposed to generate hydroxyl ions (minus ions).
[0011]
The wood ash as the ceramic supplier is desirably 50 to 70% by weight in the mixture. When the amount is 50% by weight or less, the whole becomes brittle, and when it exceeds 70% by weight, the adsorption capacity decreases.
[0012]
[Embodiment of the Invention]
Example 1
After 100 parts by weight of cedar combustion ash, 35 parts by weight of iron oxide and 30 parts by weight of polyvinyl alcohol resin are kneaded and dried, the temperature is raised from room temperature to 850 ° C. over 1 hour in a firing furnace. This temperature is maintained for 5-8 hours and then allowed to cool naturally. A light brown adsorptive ceramic is obtained.
The physical properties of this adsorptive ceramic are as follows.
[0013]
Reference Example Example 2 100 parts by weight of cypress combustion ash, 30 parts by weight of manganese oxide, and 30 parts by weight of urea resin are kneaded, dried, and then heated from room temperature to 900 ° C. over 1 hour in a firing furnace. This temperature is maintained for 6-7 hours. Then, when allowed to cool naturally, a light black adsorptive ceramic is obtained. The physical properties of this object are as follows.
[0014]
[The invention's effect]
According to the present invention, an inexpensive product having excellent ceramics adsorptivity was obtained. Moreover, negative ion generation was also confirmed.
The adsorptive power was superior to commercially available activated carbon.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000152169A JP3840038B2 (en) | 2000-04-13 | 2000-04-13 | Method for producing adsorptive ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000152169A JP3840038B2 (en) | 2000-04-13 | 2000-04-13 | Method for producing adsorptive ceramics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001354484A JP2001354484A (en) | 2001-12-25 |
| JP3840038B2 true JP3840038B2 (en) | 2006-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000152169A Expired - Fee Related JP3840038B2 (en) | 2000-04-13 | 2000-04-13 | Method for producing adsorptive ceramics |
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| Country | Link |
|---|---|
| JP (1) | JP3840038B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7489812B2 (en) * | 2020-03-31 | 2024-05-24 | 株式会社フジタ | Method for producing adsorbent |
| JP2021171691A (en) * | 2020-04-23 | 2021-11-01 | 株式会社フジタ | Adsorbent |
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2000
- 2000-04-13 JP JP2000152169A patent/JP3840038B2/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| JP2001354484A (en) | 2001-12-25 |
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