JPS60171222A - Manufacture of zinc oxide by wet process - Google Patents
Manufacture of zinc oxide by wet processInfo
- Publication number
- JPS60171222A JPS60171222A JP2514384A JP2514384A JPS60171222A JP S60171222 A JPS60171222 A JP S60171222A JP 2514384 A JP2514384 A JP 2514384A JP 2514384 A JP2514384 A JP 2514384A JP S60171222 A JPS60171222 A JP S60171222A
- Authority
- JP
- Japan
- Prior art keywords
- zinc oxide
- zinc
- soln
- solution
- reaction
- 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.)
- Pending
Links
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は亜鉛酸塩を含むアルカリ溶液に酸を加えること
によって直接酸化亜鉛を生成させる酸化亜鉛の製造方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing zinc oxide, in which zinc oxide is directly produced by adding an acid to an alkaline solution containing zincate.
従来の酸化亜鉛の製造法としては乾式法および湿式法の
.2地類がある。乾式法の代表的なものとして、金ハ亜
鉛を高温でカス化し、これを空気などで酸化するヒュー
ム法がある。この方法は原料に金属亜鉛を用いること、
高温加熱のため多量の熱工坏ルギーな必要とするなどの
ため金属亜鉛より高価となる。湿式法としては、Ii1
i鉛塩を含む水溶液を中和して塩基性炭酸亜鉛として回
収し、これを高温で熱分解して酸化亜鉛を生成させる。The conventional methods for producing zinc oxide are dry method and wet method. There are two earth classes. A typical dry method is the fume method, in which gold and zinc are turned into scum at high temperatures, and then oxidized with air. This method uses metallic zinc as the raw material,
It is more expensive than metal zinc because it requires a large amount of heat engineering due to high-temperature heating. As a wet method, Ii1
i An aqueous solution containing a lead salt is neutralized and recovered as basic zinc carbonate, which is thermally decomposed at high temperature to produce zinc oxide.
これ以外の方法として亜鉛塩を含む水溶液を中和し、温
度、pHコントロールを正確に行い、長時間保持するこ
とによって酸化亜鉛を生戎する方法もあるが、これらの
方法は高温加熱や反応温度、pH値の制御と長時間の反
応時間を要するなどの欠点を有している。Another method is to neutralize an aqueous solution containing zinc salts, accurately control temperature and pH, and hold it for a long time to produce zinc oxide, but these methods require high temperature heating or reaction temperature. However, it has drawbacks such as requiring control of pH value and long reaction time.
本発明はこれら従来の製造法の欠点を除去し、簡単な操
作で経済的に安価な酸化亜鉛を供給する方法である。The present invention eliminates the drawbacks of these conventional production methods and provides an economically inexpensive method of supplying zinc oxide with simple operations.
すなわち本発明は、亜鉛または亜鉛化合物を酸で溶解し
中和によって生じた水酸化亜鉛を更に過剰アルカリで溶
解した、あるいは亜鉛または亜鉛化合物をアルカリで溶
解した亜鉛酸塩を含むpH / .2J以上のアルカリ
性溶液に、酸を加えてpH t 2.3−pH gまで
中和することにより直接酸化亜鉛を生成させることを特
徴とする湿式法による酸化亜鉛の製造方法である。That is, the present invention provides a pH/. This is a method for producing zinc oxide by a wet method, which is characterized in that zinc oxide is directly produced by adding an acid to an alkaline solution of 2 J or more and neutralizing it to pH t 2.3-pH g.
次に硫酸亜鉛を用いる場合について、本発明の酸化亜鉛
の製造方法を説明する。Next, the method for producing zinc oxide of the present invention will be described in the case where zinc sulfate is used.
硫酸亜鉛の水溶液に苛性ソーダを加えると一度半透明の
水酸化亜鉛が沈澱するが、更に過剰の苛性ソーダを添加
すると、水酸化亜鉛は完全に再溶解して亜鉛酸ナトリウ
ムと力る。この時のpHは13〜/4’である。この溶
液に硫酸を加えると白色の微細な沈澱が生成し、pHざ
〜pHt Oで反応が完結し、沈降性のすぐれた沢過性
の良い白色の沈澱が得られる。この白色沈澱をX線回折
分析したところ酸化亜鉛であることが確認された。続い
て亜鉛濃度を変化させた溶液について同様の方法で酸化
亜鉛を回収したところ、99.9%以上の収率で酸化亜
鉛が得られた。When caustic soda is added to an aqueous solution of zinc sulfate, translucent zinc hydroxide precipitates, but when an excess of caustic soda is added, the zinc hydroxide completely redissolves and forms sodium zincate. The pH at this time is 13-/4'. When sulfuric acid is added to this solution, a fine white precipitate is formed, and the reaction is completed at a pH of 0 to pH t O, yielding a white precipitate with excellent sedimentation properties and good flowability. X-ray diffraction analysis of this white precipitate confirmed that it was zinc oxide. Subsequently, when zinc oxide was recovered in the same manner using solutions with varying zinc concentrations, zinc oxide was obtained with a yield of 99.9% or more.
助錯濃度の高い溶液を中和する場合、生成する水酸化亜
鉛のために攪拌などの扱いが困難となるときは一1亜鉛
含有溶液をアルカリ液中に滴下して行ってもよい。When neutralizing a solution with a high auxiliary complex concentration, if handling such as stirring is difficult due to the zinc hydroxide produced, the zinc-11-containing solution may be dropped into the alkaline solution.
本発明の方法によれ―:亜鉛濃度の高いものから低いも
のまで収率よく回収することが可能であり、曲鉛酸塩を
含むアルカリ溶液に酸を加えることのみで容易に酸化亜
鉛が生成するもので、アルカリ溶液中に溶解した亜鉛に
対してアルカリの種類によらずすべて適応できろ。本発
明の方法で特に規制すべきことは、酸化亜鉛生成反応の
終了時点でのpHで、pH値が高いと(pH72、S以
上)反応が完全に終了しないこと、生成酸化亜鉛の沈降
性が悲くなることから上限をpH/ 2.!;とし、p
H値が低いと生成した酸化亜鉛が再溶解することから下
限をpHg、0とする。According to the method of the present invention, zinc oxide can be easily recovered from high to low zinc concentrations with high yield, and zinc oxide can be easily produced simply by adding acid to an alkaline solution containing curvedate. It can be applied to zinc dissolved in an alkaline solution regardless of the type of alkali. What should be particularly regulated in the method of the present invention is the pH at the end of the zinc oxide production reaction.If the pH value is high (pH 72, S or higher), the reaction will not be completed completely, and the produced zinc oxide will have a tendency to settle. The upper limit should be set to pH/2. ! ; Toshi, p
If the H value is low, the generated zinc oxide will be redissolved, so the lower limit is set to pHg, 0.
温度については特に規制すべきことはないが、酸化亜鉛
の生成反応は常温以−ヒが望ましく、温度の高い方が反
応性なども良く加温することも可能である。Although there is no particular restriction on temperature, it is preferable that the reaction for producing zinc oxide be performed at room temperature or higher, and it is also possible to heat the zinc oxide as the higher the temperature, the better the reactivity.
亜鉛塩を含む溶液を用いて本発明方法を実施する場合、
中和反応はすみやかに行うことが望ましい。中和を除々
に行うと過剰アルカリに不溶性の物質を生じ不都合であ
り必要以上のアルカリを消費する恐れがある。特に伸鉛
濃度が高い場合はこれらの弊害を防止するために、唾鉛
塩含有溶液をアルカリ溶液中に滴下するのが良い。When carrying out the method of the present invention using a solution containing a zinc salt,
It is desirable to carry out the neutralization reaction promptly. If neutralization is carried out gradually, the excess alkali will produce insoluble substances, which is inconvenient and may consume more alkali than necessary. In order to prevent these disadvantages, especially when the elongation lead concentration is high, it is preferable to drop the salivary lead salt-containing solution into the alkaline solution.
酸化亜鉛の生成反応については詳細は不明であるが、こ
れは過剰アルカリに溶解生成する亜鉛酸塩の加水分解反
応と考えられる。しかし、この反応は過剰のアルカリに
溶解する他の金属には認められず、亜鉛に限られた特異
な反応である。The details of the zinc oxide production reaction are unknown, but it is thought to be a hydrolysis reaction of zincate dissolved in excess alkali. However, this reaction is not observed in other metals that dissolve in excess alkali, and is a unique reaction limited to zinc.
以下に実施例および比較例に基つき本発明を、説明する
。The present invention will be explained below based on Examples and Comparative Examples.
実施例1
0、/、9/lの亜鉛を含む硫酸亜鉛を硫酸中に溶解し
た浴液な苛性ソーダで中和しpH/ J、s〜147.
0にすると、中和時に生成しまた水酸化「也鉛は完全に
再溶解する。この溶液に硫酸を加えるとpH73付近か
ら白色の沈澱を生じpH9,3でほぼ反応を終結し、沈
降分離性の良い酸化亜鉛を生成した。酸化!1p、鉛の
収率はqq、9%以上であった。Example 1 Zinc sulfate containing 0, 9/l of zinc was neutralized with caustic soda, a bath solution dissolved in sulfuric acid, to pH/J, s~147.
If the value is 0, the lead hydroxide produced during neutralization will be completely redissolved. When sulfuric acid is added to this solution, a white precipitate will form from around pH 73, and the reaction will almost complete at pH 9.3. Zinc oxide with good oxidation yield was 1 p, lead yield was qq, 9% or more.
実施例−
5g/eの!1+r−鉛を含む塩化亜鉛塩を塩酸に溶解
した浴液を苛性ソーダで中和しpI−I / 、、?J
〜/ダ、Oにすると、中和時に生成した水酸化刑鉛は完
全に溶解する。この溶液に塩酸を加えるとpH/J付近
から白色の沈澱を生じpH9Jでほぼ反応を終結し、沈
降分離性の良い酸化亜鉛を生成した。Example - 5g/e! A bath solution in which zinc chloride salt containing 1+r-lead was dissolved in hydrochloric acid was neutralized with caustic soda to give pI-I / , ? J
When the concentration is ~/Da, O, lead hydroxide produced during neutralization is completely dissolved. When hydrochloric acid was added to this solution, a white precipitate was formed at around pH/J, and the reaction was almost completed at pH 9J, producing zinc oxide with good sedimentation separation properties.
酸化亜鉛の収率は99.9%以上であった。The yield of zinc oxide was 99.9% or more.
実施例3
/ o o g/13の亜鉛を含む塩化亜鉛を硫酸に溶
解した溶液を苛性ソーダ溶液中に滴下し、白色の沈澱が
生成し始めるところで滴下を中止した。Example 3 / o o A solution of zinc chloride dissolved in sulfuric acid containing 13 g/g of zinc was dropped into a caustic soda solution, and the dropping was stopped when a white precipitate began to form.
この溶液に塩酸を加えpH9,3−/ 0.0にすると
沈降分離性の良い酸化亜鉛が得られた。酸化亜鉛の収率
はqq、9%以上であった。When hydrochloric acid was added to this solution to adjust the pH to 9.3-/0.0, zinc oxide with good sedimentation and separation properties was obtained. The yield of zinc oxide was qq, 9% or more.
実施例q
!; 0 &/lの亜鉛を含む+に、酸原鉛を塩酸に溶
解した溶液を苛性ソーダ溶液中Vこ加え、生成する水酸
化物を完全に溶解させた後硫酸で処理すると、pH8,
0〜9.θで沈降分離性の良い酸化亜鉛が得られた。酸
化亜鉛の収率ばqq、9%以上であった。Example q! When a solution of lead dissolved in hydrochloric acid in a caustic soda solution is added to + containing 0 &/l of zinc, and after the hydroxide formed is completely dissolved, it is treated with sulfuric acid, the pH becomes 8,
0-9. Zinc oxide with good sedimentation separation property was obtained at θ. The yield of zinc oxide was 9% or more.
比較例/
実施例−の東件により再溶解した亜鉛酸ソ−ダ溶液に硫
酸を加えるとpH9,!;でほぼ反応が終結するが、更
に硫酸を加えpH7,3とした後の酸化亜鉛の収率は8
7%であった。Comparative Example/Example - When sulfuric acid is added to the redissolved sodium zincate solution according to the Tokyo case, the pH becomes 9! ; the reaction is almost complete, but after adding sulfuric acid to adjust the pH to 7.3, the yield of zinc oxide is 8.
It was 7%.
比較例コ
実施例コの条件により再溶解した亜鉛酸ソーダ溶液に塩
酸を加えpHl3で反応を中断させた場合の酸化亜鉛の
収率はlチ以下であった。When hydrochloric acid was added to the sodium zincate solution redissolved under the conditions of Comparative Example and Example C and the reaction was interrupted at pH 13, the yield of zinc oxide was less than 1.
以上述べたように、本発明の酸化亜鉛の製造方法は操作
も簡単であり、特に精密なpHコントロールを必要とせ
ず、また、生成する酸化亜鉛は沈降分離性が良く簡単な
1過操作で容易に回収され、必要なエイ・ルギーも酸化
亜鉛の乾燥程度であり従来法に比較して省エネルギーで
安価な酸化亜鉛の製造法である。As described above, the method for producing zinc oxide of the present invention is easy to operate, does not require particularly precise pH control, and the zinc oxide produced has good sedimentation and separation properties and can be easily carried out by a simple one-pass operation. It is a method of producing zinc oxide that is energy-saving and inexpensive compared to conventional methods, as the amount of energy required is only that of dry zinc oxide.
本発明の方法によれば、亜鉛の湿式製練における電解液
より直接高純度の酸化亜鉛を製造することが可能となり
、本発明の適用によって安価な酸化亜鉛を提供できるた
め、酸化亜鉛の需要増など当業界に貢献する。According to the method of the present invention, it is possible to directly produce high-purity zinc oxide from the electrolyte in wet smelting of zinc, and by applying the present invention, it is possible to provide inexpensive zinc oxide, which increases the demand for zinc oxide. Contribute to this industry.
Claims (1)
液に、酸を加えてpH/ユ..t−pH gまで中和す
ることにより直接酸化亜鉛を生成させることを特徴とす
る湿式法による酸化亜鉛の製造方法。pH i with zincate 2. ! ; Add an acid to the above alkaline solution to adjust the pH/Y. .. A method for producing zinc oxide by a wet method, characterized in that zinc oxide is directly produced by neutralizing to t-pH g.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2514384A JPS60171222A (en) | 1984-02-15 | 1984-02-15 | Manufacture of zinc oxide by wet process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2514384A JPS60171222A (en) | 1984-02-15 | 1984-02-15 | Manufacture of zinc oxide by wet process |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60171222A true JPS60171222A (en) | 1985-09-04 |
Family
ID=12157760
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2514384A Pending JPS60171222A (en) | 1984-02-15 | 1984-02-15 | Manufacture of zinc oxide by wet process |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60171222A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012513370A (en) * | 2008-12-23 | 2012-06-14 | ポスコ | Method for producing high purity zinc oxide using secondary dust |
KR101334261B1 (en) * | 2011-11-25 | 2013-11-29 | 한국생산기술연구원 | A preparation method of zinc oxide by wet precipitation |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5510546A (en) * | 1978-07-11 | 1980-01-25 | Asahi Glass Co Ltd | Immunity sensor |
-
1984
- 1984-02-15 JP JP2514384A patent/JPS60171222A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5510546A (en) * | 1978-07-11 | 1980-01-25 | Asahi Glass Co Ltd | Immunity sensor |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012513370A (en) * | 2008-12-23 | 2012-06-14 | ポスコ | Method for producing high purity zinc oxide using secondary dust |
KR101334261B1 (en) * | 2011-11-25 | 2013-11-29 | 한국생산기술연구원 | A preparation method of zinc oxide by wet precipitation |
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