バリウムスルフィド

解説BaS(169.39)．約1000 ℃ に熱した炭酸バリウムに硫化水素と水素との等モル混合気体を通じると得られる．無色の立方晶系結晶．密度4.25 g cm－3(15 ℃)．融点2200 ℃．空気中では酸化されてチオ硫酸バリウムを生じる．また，水分と二酸化炭素を吸収して硫化水素を発生する．水を加えると加水分解して硫化水素バリウムと水酸化バリウムを生じる．酸に溶けて硫化水素を発生する．エタノールに不溶．有毒．森北出版「化学辞典（第2版）

天然物の起源Barium sulfide occurs in the form of black ash, which is a gray to black impure product obtained from high temperature carbonaceous reduction of barite. It is the starting material in the manufacture of most barium compounds including barium chloride and barium carbonate. It is used in luminous paints; for dehairing hides; as a flame retardant; and for generating H2S.

使用Barium sulfide has different characters, so it is used in a variety of ways, such as in electronics, paint pigments, dehairing hides, flame retardant, luminous paints, and generating pure hydrogen sulfide. Barium sulfide can deviate X-rays and helps to give clearly image of the soft tissue. Barium sulfide is a precursor to other barium compounds and also used as a short wavelength emitters for electronic displays.

一般的な説明Barium sulfide (BaS) is an inorganic compound that is used as a precursor in the production of barium compounds. These compounds can be used in a variety of applications, such as ceramics, luminous paints, additives, and flame retardants.

使用用途硫化バリウムの使用用途は、ゴムの加硫、硫化水素の発生用試薬などとして用いられます。またと混合してリトポンと呼ばれる白色の顔料を製造するのに使用されます。硫化バリウムは、銅やその合金の表面を黒色に着色する硫化着色法と呼ばれる方法で用いる硫化物の一つとしても使用できます。 硫化バリウムの多硫化物として、黄色結晶の三硫化バリウム (BaS3)、淡赤色の斜方晶系柱状晶の四硫化バリウムなどがあります。これらの混合物は硫化バリウム華と呼ばれ、殺虫剤や皮革の脱毛剤として用いられます。 また有毒のため急性中毒や刺激性があり、酸と接触すると硫化水素ガスが発生するため注意が必要です。保護具として、保護眼鏡や保護手袋、保護衣、防じんマスクなどの使用が想定されます。

Barium sulfide is grayish-white solid, formed by heating barium sulfate and carbon, reactive with H2O to form barium hydrosulfide, Ba(SH)2, solution. The latter is also made by saturation of barium hydroxide solution with H2S. Barium polysulfides are formed by boiling barium hydrosulfide with sulfur.

製造方法Barium sulfide can be prepared by the direct reaction of the elements, calcined in an inert atmosphere, at a 1:1.05 molecular ratio: Ba＋S＋heat→BaS Barium sulfide is prepared commercially by heating barite (BaO) with coal or petroleum coke in a rotary kiln at 1000°C to 1250°C in an oxygen-free atmosphere. The product, black ash, is a gray or black powder containing carbonaceous impurities and unreacted barite. Barium sulfide is separated from impurities by extraction with hot water and filtration. Barium sulfide may also be made by high temperature reduction of barium sulfate with methane.