炭酸水酸化鉛(亜炭酸鉛) 化学特性,用途語,生産方法
外観
白色～わずかにうすい灰色, 粉末
性質
炭酸水酸化鉛 (II) のことで，化学式 Pb3(Co3)2(OH)2 または 2PbCO3・Pb(OH)2 。鉛イオンを含む水溶液に炭酸ナトリウムを加えて熱すると白色の沈殿として得られる。比重 6.14，水に不溶だが硝酸に可溶。
溶解性
水又はエタノールにほとんど溶けない。硝酸, 酢酸に可溶。炭酸に微溶。水又はエタノールにほとんど溶けない。
解説
炭酸鉛の塩基性塩。無色の結晶。水には溶けない。水道用鉛管では表面にこの緻密な皮膜が生じ、内部を保護する。工業上は鉛白といい，古来白色顔料として用いられているが有害である。化学式2PbCO3・Pb（OH）2
小学館 デジタル大辞泉について 情報 | 凡例
用途
陶磁器、ほうろうの釉薬、塗料、塩ビ安定剤、顔料、ゴム
用途
塗料、絵具、( 塩化ビニル) 安定剤
化学的特性
dense white powder
使用
Lead(II) carbonate basic can be used as pigment in oil paints and water colors; in cements; for making putty and lead carbonate paper; in the processing of parchment.
定義
Acid-soluble, heavy, white powder or
crystalline substance, insoluble in water and alco-
hol.
調製方法
Basic Lead Carbonate is produced by several methods, in which soluble lead acetate is treated with carbon dioxide. For example, in the Thompson-Stewart process, an aqueous slurry of finely divided lead metal or monoxide, or a mixture of both, is treated with acetic acid in the presence of air and carbon dioxide. High quality, very fine particle-size basic lead carbonate is produced, ranging in carbonate content from 62 to 65% (vs 68.9% PbCO3, theoretical).
製造方法
Many commercial processes have been developed for manufacturing basic lead carbonate. These include: Thomson-Stewart process, Carter process, and Dutch process. The method of preparation involves treating lead with acetic acid vapors in the presence of carbon dioxide at 60°C. In the Thomson-Stewart process, finely divided lead monoxide or lead metal is mixed with water to give aqueous slurry, which is then mixed with acetic acid in the presence of air and carbon dioxide. All these processes are slow, taking weeks to obtain products of desired composition.
Basic lead carbonate also is precipitated by dissolving lead monoxide in lead(II) acetate solution, and treating the solution with carbon dioxide. It also is produced by electrolysis of sodium nitrate or sodium acetate using lead anode and then precipitating out the product by adding sodium carbonate.
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炭酸水酸化鉛(亜炭酸鉛) 上流と下流の製品情報
原材料
準備製品