Coating knowledge: sulfide application

It is suggested that the application of hydrogen sulfide system in analytical chemistry is a traditional and widely used method for the analysis of cations The common cations are divided into five groups according to the significant differences in the solubility of each ion sulfide Because of the toxicity of H2S and the inconvenience of storage, thioacetamide (ch3csnh2, TAA) aqueous solution is usually used as precipitant In acid solution, TAA hydrolyzes to produce H2S, which can replace H2S: ch3csnh2 + H + 2H2O CH3COOH + NH4 + H2S ↑ hydrolyzes to generate HS in ammonia solution, which can replace（ Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Home of coatings news: the application of hydrogen sulfide system in analytical chemistry is a traditional and widely used method for the analysis of cations The common cations are divided into five groups according to the significant differences in the solubility of each ion sulfide Because of the toxicity of H2S and the inconvenience of storage, thioacetamide (ch3csnh2, TAA) aqueous solution is usually used as precipitant In acid solution, TAA can hydrolyze to generate H2S, which can replace H2S: ch3csnh2 + H + 2H2O ⇌ CH3COOH + NH4 + H2S ↑ in ammonia solution to generate HS, which can replace (NH4) 2S: ch3csnh2 + 2nh3 ⇌ ch3-c (- NH2) = NH + NH4 + HS to hydrolyze to generate s in alkaline solution Other applications that can replace Na2S: ch3csnh2 + 3OH ⇌ CH3COO + NH3 + H2O + s sulfide include: Molybdenum disulfide is a catalyst in organic synthesis Because sulfur-containing organic compounds (such as thiophene) will poison the common hydrogenation catalyst, molybdenum disulfide can be used to catalyze the hydrogenation of sulfur-containing organic substances Cadmium sulfide can be used to make photocells Lead sulfide is used to make infrared sensors Calcium polysulfide, barium polysulfide and ammonium polysulfide are fungicides and insecticides Carbon disulfide is used as a solvent in industry In addition, carbon disulfide is also used to produce carbon tetrachloride In organic chemistry, carbon disulfide is used to insert - C (= s) - s-group Zinc sulfide and cadmium sulfide are used to make phosphors High purity cadmium sulfide is a good semiconductor Phosphorus trisulfide is used to make matches and fireworks Tetraphosphorus decasulfide is used to make insecticides, lubricant additives and flotation agents Sodium sulfide is widely used in the manufacture of sulfurized dyes, organic drugs and pulp Calcium sulfide and barium sulfide are used to make luminescent paints Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,