JPH10324933A - Production of high-purity tellurium and production apparatus therefor - Google Patents
Production of high-purity tellurium and production apparatus thereforInfo
- Publication number
- JPH10324933A JPH10324933A JP9151509A JP15150997A JPH10324933A JP H10324933 A JPH10324933 A JP H10324933A JP 9151509 A JP9151509 A JP 9151509A JP 15150997 A JP15150997 A JP 15150997A JP H10324933 A JPH10324933 A JP H10324933A
- Authority
- JP
- Japan
- Prior art keywords
- tellurium
- purity
- raw material
- crucible
- vacuum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、純度９９．９％程
度の市販金属テルル等から真空蒸留精製により、純度９
９．９９９９％以上の高純度テルルを製造する方法とそ
の装置に関する。BACKGROUND OF THE INVENTION The present invention relates to a method for purifying a pure metal having a purity of about 99.9% by vacuum distillation purification from commercially available metal tellurium or the like.
The present invention relates to a method and apparatus for producing high-purity tellurium of 9.9999% or more.
【０００２】[0002]
【従来の技術】一般に金属テルルは、テルルソウエン鉱
の粉末を炭酸アルカリやオリーブ油と混ぜ合わせ、強熱
処理した後に水で抽出し、得られた抽出液に空気を吹き
込むことによってテルルの沈殿物を得ている。更に別な
手段としては、テルルを含む粗銅を陽極として銅の電解
精製を行い、テルルを金、銀、鉛等とともに沈殿させ電
解槽の底部に沈殿物として分離する。2. Description of the Related Art In general, tellurium metal is obtained by mixing tellurium ore powder with alkali carbonate or olive oil, subjecting it to a strong heat treatment, extracting with water, and blowing air into the resulting extract to obtain a tellurium precipitate. I have. As still another means, electrolytic purification of copper is performed using blister copper containing tellurium as an anode, and tellurium is precipitated together with gold, silver, lead, etc., and separated as a precipitate at the bottom of the electrolytic cell.
【０００３】このようにして得た沈殿物を水洗・乾燥さ
せた後、精製処理を施して粉末、インゴット、棒状体と
して純度９９．０％以上のものを市販している。[0003] The precipitate thus obtained is washed with water and dried, and then subjected to a purification treatment, and powders, ingots, and rods having a purity of 99.0% or more are commercially available.
【０００４】[0004]
【発明が解決しようとする課題】上述のように市販品
は、不純物としてＦｅやＳｅを１ｐｐｍ以上含まれてい
ることから、この金属を更にゾーン精製法によって精製
する手段もあるが、精製後の切断加工の必要性と汚染の
危険があることから、精製時の処理量の制約や精製テル
ルをインゴットにする場合には鋳造時の不純物の混入に
よる汚染の問題があった。As described above, since commercially available products contain Fe and Se as impurities in an amount of 1 ppm or more, there is a means for further purifying this metal by a zone purification method. Because of the necessity of the cutting process and the danger of contamination, there have been problems of restrictions on the amount of processing at the time of refining and contamination due to the incorporation of impurities at the time of casting when refining tellurium is used as an ingot.
【０００５】したがって本発明の目的は、従来の精製法
ではテルルとの完全分離が困難であったＦｅ、Ｓｅ等を
分離できる新規な精製手段を開発することによって純度
９９．９９９９％以上の高純度テルルを直接インゴット
状で製造できる製造方法と製造装置を提供することにあ
る。Accordingly, an object of the present invention is to develop a novel purification means capable of separating Fe, Se, etc., which has been difficult to completely separate from tellurium by the conventional purification method, thereby achieving high purity of 99.9999% or more. An object of the present invention is to provide a manufacturing method and a manufacturing apparatus capable of directly manufacturing tellurium in an ingot shape.
【０００６】[0006]
【課題を解決するための手段】本発明者らは上記目的を
達成すべく鋭意研究の結果、外筒と内筒からなる二重の
石英筒で封体した内部に原料テルルが装入される原料る
つぼとこれに連接して設けられる回収鋳型を配置して真
空蒸留を行い、蒸発したテルルを石英筒面に凝縮させ、
これを回収鋳型に回収するようにすれば、従来よりも簡
易な構造でしかも精製から鋳造までを一回の連続工程で
処理できる上、汚染が少ないので、含有する不純物が１
ｐｐｍ未満の純度９９．９９９９％以上の高純度テルル
が得られることを見いだし本発明に到達した。Means for Solving the Problems The inventors of the present invention have conducted extensive studies to achieve the above object, and as a result, a raw material tellurium is charged inside a double quartz tube composed of an outer cylinder and an inner cylinder. A raw material crucible and a collection mold provided in connection with the crucible are arranged and vacuum distillation is performed, and the evaporated tellurium is condensed on the quartz cylinder surface,
If this is collected in a recovery mold, it has a simpler structure than conventional ones, and processing from refining to casting can be performed in one continuous process, and since there is little contamination, it contains less impurities.
The inventors have found that high-purity tellurium having a purity of less than 9 ppm and less than 99.9999% can be obtained, and the present invention has been achieved.
【０００７】すなわち本発明の第１は、テルル原料を真
空溶解して高純度テルルを製造する方法において、原料
るつぼに装入された原料テルルを温度５００℃以上、真
空度１×１０-2Ｔｏｒｒ以下で真空蒸留することによ
り、蒸発させたテルルを原料るつぼに連接する回収鋳型
に回収してインゴットとし、不純物として金属の含有量
がそれぞれ０．１ppm 以下で、かつガス成分以外の不純
物量が１ppm 未満である純度９９．９９９９％以上の高
純度テルルを得ることを特徴とする高純度テルルの製造
方法；第２に、真空精製部と、これを加熱する電気炉を
備えた加熱部とを主要構成部とする高純度テルルの製造
装置であって、上記真空精製部がそれぞれ脱着可能に連
接する原料るつぼと回収鋳型、冷却トラップおよび水冷
フランジとからなり、かつ上記原料るつぼと回収鋳型が
耐熱材からなる二重の筒で封体されていることを特徴と
する高純度テルルの製造装置を提供するものである。That is, a first aspect of the present invention is a method for producing high-purity tellurium by vacuum-melting tellurium raw material, wherein the raw material tellurium charged in the raw material crucible is heated to a temperature of 500 ° C. or more and a degree of vacuum of 1 × 10 −2 Torr. By vacuum distillation below, the evaporated tellurium is recovered in a recovery mold connected to the raw material crucible to form an ingot, and the content of metals as impurities is 0.1 ppm or less and the amount of impurities other than gas components is 1 ppm. A method for producing high-purity tellurium, characterized in that high-purity tellurium having a purity of less than 99.9999% is obtained; secondly, a vacuum purification section and a heating section provided with an electric furnace for heating the section. A manufacturing apparatus for high-purity tellurium to be a constituent part, the vacuum purifying part comprises a raw material crucible and a collecting mold, each of which is detachably connected, a cooling trap and a water-cooled flange, One the raw material crucible and recovery template is to provide an apparatus for producing high-purity tellurium, characterized in that it is sealed body double cylinder consisting of heat-resistant material.
【０００８】[0008]
【発明の実施の形態】本発明の高純度テルルの製造装置
は、一例として図１の概略図に示す構造とすることがで
きる。すなわち電気炉１内に配置された石英製外筒３内
を真空排気装置２により真空排気を行えるよう、上記外
筒３内に原料るつぼ５、回収鋳型６、鋳型中央部に設け
た吸入台９、吸入台下の冷却トラップ８、これを冷却す
る水冷フランジ７を脱着可能に連接し、さらに原料るつ
ぼ上面に石英製内筒４を設けて外筒３と共に二重構造と
なって封体されている。BEST MODE FOR CARRYING OUT THE INVENTION The apparatus for producing high-purity tellurium of the present invention can have a structure shown in the schematic diagram of FIG. 1 as an example. That is, the raw material crucible 5, the recovery mold 6, and the suction table 9 provided at the center of the mold are placed in the outer cylinder 3 so that the inside of the outer cylinder 3 made of quartz placed in the electric furnace 1 can be evacuated by the evacuation device 2. A cooling trap 8 below the suction table and a water-cooling flange 7 for cooling the same are detachably connected, and a quartz inner cylinder 4 is further provided on the upper surface of the raw material crucible to form a double structure with the outer cylinder 3 and sealed. I have.
【０００９】この場合、原料テルルとして市販金属テル
ル（純度９９．９％程度）を原料るつぼ５に適量入れ、
電気炉で５００℃以上、好ましくは５００〜６００℃の
温度範囲にすると共に、真空度を１×１０-2Ｔｏｒｒ以
下、好ましくは１×１０-2〜１×１０-3Ｔｏｒｒの範囲
に制御すると原料るつぼ内の原料テルルが融解・蒸発
し、該るつぼ５と上部の内筒４との間に落下して、るつ
ぼ底部に連接する回収鋳型６の中に回収される。In this case, as a raw material tellurium, a suitable amount of commercially available metal tellurium (purity of about 99.9%) is put into the raw material crucible 5,
When the temperature is controlled to 500 ° C. or more, preferably 500 to 600 ° C. in an electric furnace, and the degree of vacuum is controlled to 1 × 10 −2 Torr or less, preferably 1 × 10 −2 to 1 × 10 −3 Torr. The raw material tellurium in the raw material crucible melts and evaporates, falls between the crucible 5 and the upper inner cylinder 4, and is recovered in the recovery mold 6 connected to the bottom of the crucible.
【００１０】原料テルル中に含有される不純物のうち、
テルルより蒸気圧の低いアルミニウム、ケイ素、カルシ
ウム、鉄、ニッケル、銅、鉛、ビスマスは原料るつぼ５
内に残留し、逆に蒸気圧の高い硫黄、塩素、カリウム、
カドミウム、セレン、亜鉛は凝縮することなく気体状で
真空排気装置２によってるつぼ底部に設けられた吸入孔
を通って冷却トラップ８内に吸収され、水冷フランジ７
の働きにより冷却されて固化する。Among the impurities contained in the raw material tellurium,
Aluminum, silicon, calcium, iron, nickel, copper, lead and bismuth with lower vapor pressure than tellurium
Sulfur, chlorine, potassium,
Cadmium, selenium, and zinc are absorbed in the cooling trap 8 in a gaseous state without condensing through the suction hole provided at the bottom of the crucible by the vacuum evacuation device 2,
It is cooled and solidified by the action of.
【００１１】本発明においては、予め、回収用の鋳型の
形状を精製後の次工程で用いる鋳型の形状にしてあるた
め、従来法のように精製されたテルルを再度鋳造する必
要はなく、このため汚染の少ない高純度テルル製品を精
製・鋳造の工程を区別することなく一回の処理で製造で
きる。In the present invention, since the shape of the mold for recovery is set in advance to the shape of the mold used in the next step after purification, it is not necessary to recast the purified tellurium as in the conventional method. Therefore, a high-purity tellurium product with little contamination can be manufactured in one process without discriminating between the refining and casting processes.
【００１２】このようにして得られた高純度テルルをグ
ロー放電質量分析装置で分析したところ、ナトリウム、
アルミニウム、ケイ素、硫黄、塩素、カリウム、カルシ
ウム、鉄、ニッケル、銅、カドミウム、セレン、鉛、ビ
スマス、亜鉛がそれぞれ０．１ｐｐｍ以下で、かつガス
成分以外の不純物が１ｐｐｍ未満の値を示していた。The high-purity tellurium thus obtained was analyzed by a glow discharge mass spectrometer.
Aluminum, silicon, sulfur, chlorine, potassium, calcium, iron, nickel, copper, cadmium, selenium, lead, bismuth, and zinc were each 0.1 ppm or less, and impurities other than gas components showed values of less than 1 ppm. .
【００１３】したがって、本発明においては測定対象元
素をＮａ、Ａｌ、Ｓｉ、Ｓ、Ｃｌ、Ｋ、Ｃａ、Ｆｅ、Ｎ
ｉ、Ｃｕ、Ｃｄ、Ｓｅ、Ｐｂ、Ｂｉ、Ｚｎとし、グロー
放電質量分析装置により定量分析を行い、得られた不純
物含有量の総和を１００％から差し引いて得られた数値
が９９．９９９９％以上の場合をもって純度９９．９９
９９％以上の高純度テルルと定義した。Therefore, in the present invention, the elements to be measured are Na, Al, Si, S, Cl, K, Ca, Fe and N.
i, Cu, Cd, Se, Pb, Bi, and Zn were quantitatively analyzed by a glow discharge mass spectrometer, and the total value of the obtained impurity contents was subtracted from 100%, and the numerical value obtained was 99.9999% or more. In case of 99.99
It was defined as high-purity tellurium of 99% or more.
【００１４】以下、実施例により本発明をさらに説明す
るが、本発明の範囲はこれらに限定されるものではな
い。Hereinafter, the present invention will be further described with reference to examples, but the scope of the present invention is not limited thereto.
【００１５】[0015]
【実施例１】図１の高純度テルル製造装置を参照して以
下説明する。先ず、純度９９．９９％の市販金属テルル
１００ｇを原料るつぼ５に入れ、回収鋳型６中央部に設
置した吸入台９上に固定した後、図１に示すように電気
炉１内に装入した。Embodiment 1 A description will be given below with reference to a high-purity tellurium manufacturing apparatus shown in FIG. First, 100 g of commercially available metal tellurium having a purity of 99.99% was placed in a raw material crucible 5, fixed on a suction table 9 provided at the center of a recovery mold 6, and then charged into the electric furnace 1 as shown in FIG. 1. .
【００１６】この場合、原料るつぼ５と回収鋳型６の上
面には、石英製の外筒３と内筒４とが設けられ、真空排
気装置２によって内筒４内部が真空状態となる構造であ
る。In this case, an outer cylinder 3 and an inner cylinder 4 made of quartz are provided on the upper surfaces of the raw material crucible 5 and the recovery mold 6, and the inside of the inner cylinder 4 is evacuated by the vacuum exhaust device 2. .
【００１７】真空排気装置２で排気して内筒４の真空度
を１×１０-2Ｔｏｒｒとすると共に炉温を５００℃一定
で５時間精製したところ、原料中のテルルはいったん蒸
発した後、原料るつぼ５上の内筒４の面に接触して次第
に凝縮し始め、粒状になって原料るつぼ５の底部に設け
た回収鋳型６の中に落下した。この粒状テルル９９ｇを
回収し、その品位を表１に示した。When the vacuum was exhausted by the vacuum evacuation device 2 and the degree of vacuum of the inner cylinder 4 was adjusted to 1 × 10 -2 Torr and the furnace temperature was kept constant at 500 ° C. for 5 hours, tellurium in the raw material was once evaporated. The powder gradually came into contact with the surface of the inner cylinder 4 on the raw material crucible 5, began to condense, and fell into granular form into the collecting mold 6 provided at the bottom of the raw material crucible 5. 99 g of the granular tellurium was recovered, and the quality is shown in Table 1.
【００１８】一方、テルルより蒸気圧の高いものはガス
状のまま排気装置で吸引され、吸入台９の上部に設けら
れた吸入孔を通過して冷却トラップ８上で固化した。こ
の固化物を分析したところ、その主成分はナトリウム、
硫黄、塩素、カリウム、カドミウム、セレン、亜鉛など
いずれも蒸気圧の高い物質であることがわかった。併せ
て原料るつぼ内に残っている金属を分析したところ、そ
の主成分はアルミニウム、ケイ素、カルシウム、鉄、ニ
ッケル、銅、鉛、ビスマスなどの蒸気圧の低い物質であ
ることがわかった。On the other hand, the gas having a higher vapor pressure than tellurium is sucked by the exhaust device in a gaseous state, passes through a suction hole provided in the upper part of the suction table 9, and solidifies on the cooling trap 8. When this solid was analyzed, its main component was sodium,
It was found that sulfur, chlorine, potassium, cadmium, selenium, zinc and the like were all substances with high vapor pressure. In addition, analysis of the metal remaining in the raw material crucible revealed that the main component was a substance having a low vapor pressure, such as aluminum, silicon, calcium, iron, nickel, copper, lead, and bismuth.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【実施例２】純度９９．９９％の市販金属テルル１００
ｇを原料るつぼ５に入れて、真空度を１×１０-3Ｔｏｒ
ｒ、加熱温度を５５０℃として実施例１と同様に精製を
行い、精製テルル９９ｇを得た。この品位を表１に併せ
て示した。Example 2 Commercially available metal tellurium 100 having a purity of 99.99%
g into the raw material crucible 5 and reduce the degree of vacuum to 1 × 10 −3 Torr.
The purification was performed in the same manner as in Example 1 except that the heating temperature was changed to 550 ° C. to obtain 99 g of purified tellurium. The quality is also shown in Table 1.
【００２１】[0021]
【比較例１】比較のため、純度９９．９％の市販金属テ
ルルの品位を表１に併せて示した。Comparative Example 1 For comparison, Table 1 also shows the grade of commercially available metal tellurium having a purity of 99.9%.
【００２２】[0022]
【発明の効果】上述のように、本発明の方法に基づく製
造装置によれば、原料るつぼで溶解したテルルは蒸発し
て内筒表面に凝縮し、鋳型に回収されてインゴットを形
成するので、従来必要とされていた鋳造や後処理等の複
雑な工程に代わって、本発明の簡易な構造の製造装置を
用いることにより、精製から鋳造までの一連の工程を汚
染の危険が少ない一回の工程で行なえるようになり、従
来よりも分離精度が高くしかもコスト低減可能な精製手
段を提供できる。As described above, according to the manufacturing apparatus based on the method of the present invention, tellurium dissolved in the raw material crucible evaporates and condenses on the inner cylinder surface, and is collected in the mold to form an ingot. By using the manufacturing apparatus having a simple structure of the present invention instead of the complicated steps such as casting and post-treatment that have been conventionally required, a series of steps from refining to casting can be performed once with less risk of contamination. It is possible to provide a purification means which can be carried out in steps and which has higher separation accuracy and cost reduction than ever before.
【図１】本発明に係る高純度テルルの製造装置の概要を
示す概略断面図である。FIG. 1 is a schematic cross-sectional view showing an outline of an apparatus for producing high-purity tellurium according to the present invention.
１ 電気炉 ２ 真空排気装置 ３ 石英製外筒 ４ 石英製内筒 ５ 原料るつぼ ６ 回収鋳型 ７ 水冷フランジ ８ 冷却トラップ ９ 吸入台 DESCRIPTION OF SYMBOLS 1 Electric furnace 2 Vacuum exhaust device 3 Quartz outer cylinder 4 Quartz inner cylinder 5 Raw material crucible 6 Recovery mold 7 Water cooling flange 8 Cooling trap 9 Suction stand
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【手続補正書】[Procedure amendment]
【提出日】平成９年５月２７日[Submission date] May 27, 1997
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】発明の名称[Correction target item name] Name of invention
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【発明の名称】 高純度テルルの製造方法及び製造装置Patent application title: Method and apparatus for producing high-purity tellurium
Claims (2)
を製造する方法において、原料るつぼに装入された原料
テルルを温度５００℃以上、真空度１×１０-2Ｔｏｒｒ
以下で真空蒸留することにより、蒸発させたテルルを原
料るつぼに連接する回収鋳型に回収してインゴットと
し、不純物としての金属の含有量がそれぞれ０．１ｐｐ
ｍ以下で、かつガス成分以外の不純物量が１ｐｐｍ未満
である純度９９．９９９９％以上の高純度テルルを得る
ことを特徴とする高純度テルルの製造方法。1. A method for producing high-purity tellurium by vacuum-melting tellurium raw material, wherein the raw material tellurium charged in the raw material crucible is heated to a temperature of 500 ° C. or more and a degree of vacuum of 1 × 10 −2 Torr.
By vacuum distillation below, the evaporated tellurium is recovered in a recovery mold connected to the raw material crucible to form an ingot, and the content of metals as impurities is 0.1 pp each.
m. The method for producing high-purity tellurium, characterized in that high-purity tellurium having a purity of 99.9999% or more and an impurity amount other than gas components of less than 1 ppm is obtained.
備えた加熱部とを主要構成部とする高純度テルルの製造
装置であって、上記真空精製部がそれぞれ脱着可能に連
接する原料るつぼ、回収鋳型、冷却トラップおよび水冷
フランジからなり、かつ上記原料るつぼと回収鋳型が耐
熱材からなる二重の筒で封体されていることを特徴とす
る高純度テルルの製造装置。2. A high-purity tellurium manufacturing apparatus comprising a vacuum purification section and a heating section having an electric furnace for heating the vacuum purification section as main components, wherein the vacuum purification section is detachably connected to each other. An apparatus for producing high-purity tellurium, comprising a crucible, a recovery mold, a cooling trap, and a water-cooled flange, wherein the raw material crucible and the recovery mold are sealed by a double cylinder made of a heat-resistant material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15150997A JP3768332B2 (en) | 1997-05-26 | 1997-05-26 | High purity tellurium manufacturing method and manufacturing apparatus thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15150997A JP3768332B2 (en) | 1997-05-26 | 1997-05-26 | High purity tellurium manufacturing method and manufacturing apparatus thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10324933A true JPH10324933A (en) | 1998-12-08 |
| JP3768332B2 JP3768332B2 (en) | 2006-04-19 |
Family
ID=15520075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15150997A Expired - Fee Related JP3768332B2 (en) | 1997-05-26 | 1997-05-26 | High purity tellurium manufacturing method and manufacturing apparatus thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3768332B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101408661B1 (en) * | 2012-08-29 | 2014-06-19 | 충남대학교산학협력단 | Apparatus for Manufacturing of Tellurium Powder by Vacuum Distillation and Controlling Particle Size |
| CN107585745A (en) * | 2017-07-31 | 2018-01-16 | 成都中建材光电材料有限公司 | A kind of 5N telluriums production technology |
| RU2687403C1 (en) * | 2018-10-08 | 2019-05-13 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Российский химико-технологический университет имени Д.И. Менделеева" (РХТУ им. Д.И. Менделеева) | Method for producing high-purity tellure by distillation with low content of selenium |
| CN110042246A (en) * | 2019-04-24 | 2019-07-23 | 紫金矿业集团股份有限公司 | A kind of method of high tellurium silver selenium slag short route recycling selenium |
| US10378084B2 (en) | 2012-08-31 | 2019-08-13 | Hosei University | Method for concentrating metal compound by reduction and oxidation |
| CN110894065A (en) * | 2019-12-18 | 2020-03-20 | 中南大学 | Equipment and method for preparing high-purity tellurium |
| CN112408338A (en) * | 2020-11-17 | 2021-02-26 | 昆明理工大学 | Method and device for purifying crude tellurium |
| CN115724411A (en) * | 2022-12-02 | 2023-03-03 | 成都中建材光电材料有限公司 | Preparation method of high-purity tellurium |
-
1997
- 1997-05-26 JP JP15150997A patent/JP3768332B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101408661B1 (en) * | 2012-08-29 | 2014-06-19 | 충남대학교산학협력단 | Apparatus for Manufacturing of Tellurium Powder by Vacuum Distillation and Controlling Particle Size |
| US10378084B2 (en) | 2012-08-31 | 2019-08-13 | Hosei University | Method for concentrating metal compound by reduction and oxidation |
| CN107585745A (en) * | 2017-07-31 | 2018-01-16 | 成都中建材光电材料有限公司 | A kind of 5N telluriums production technology |
| RU2687403C1 (en) * | 2018-10-08 | 2019-05-13 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Российский химико-технологический университет имени Д.И. Менделеева" (РХТУ им. Д.И. Менделеева) | Method for producing high-purity tellure by distillation with low content of selenium |
| CN110042246A (en) * | 2019-04-24 | 2019-07-23 | 紫金矿业集团股份有限公司 | A kind of method of high tellurium silver selenium slag short route recycling selenium |
| CN110894065A (en) * | 2019-12-18 | 2020-03-20 | 中南大学 | Equipment and method for preparing high-purity tellurium |
| CN110894065B (en) * | 2019-12-18 | 2023-04-07 | 中南大学 | Equipment and method for preparing high-purity tellurium |
| CN112408338A (en) * | 2020-11-17 | 2021-02-26 | 昆明理工大学 | Method and device for purifying crude tellurium |
| CN115724411A (en) * | 2022-12-02 | 2023-03-03 | 成都中建材光电材料有限公司 | Preparation method of high-purity tellurium |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3768332B2 (en) | 2006-04-19 |
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